Intel Core i7-5775C - Broadwell Gives 9 Series Boards Last Shot At GloryEarlier this month Intel launched their 5th Generation Core 'Broadwell' processors for both desktop and laptop solutions. This processor series is the first to be built on the 14nm manufacturing process and is a 'tick' in Intel's tick-tock cadence that they have been doing for many years. Broadwell was supposed to launch last year with the Intel 9 series of chipsets, but for reasons unknown to us, Intel delayed the launch of Broadwell. Intel came out with the Haswell refresh along with the Intel 9 series boards in 2014, but we all knew that Broadwell was supposed to be launching then. After much delay, Intel finally announced Broadwell processors on June 2nd with the announcement of ten Broadwell processors all at once. The only problem is that nearly three weeks later the processors still haven't made it to the channel in any significant volume. Since Intel delayed Broadwell by nearly a year, Broadwell processors are coming out just a couple months ahead of Intel's upcoming Skylake processors that are 'tock' in the launch cycle. This means that the manufacturing process will remain at 14nm, but there were major architecture change. Rumor has it that Intel will be launching Skylake in August at Gamescom. Intel Skylake processors will be launched in conjunction with the Intel 100 series of chipsets that feature new LGA1151 sockets and support for DDR4 dual-channel memory among other things. This creates an interesting situation as Intel will have two different mainstream platforms to pick from summer if you are building a brand new system. You'll be able to pick between using Broadwell with an Intel 9 series chipset board or you can go with Skylake with an Intel 100 series chipset board. The obvious choice for enthusiasts would be to go Skylake, but keep in mind that Skylake will likely be using DDR4 memory and that will drive the cost of a platform up. If you already have an Intel 8 series board and have been waiting on Broadwell to come out to upgrade your current platform, we might have some bad news for you. Most all of the board manufacturers that we talked to will not be updating their Intel 8 series boards UEFI/BIOS to support Broadwell. To be honest, even the latest Intel 9 series boards have really sketchy UEFI/BIOS revisions this very second and is likely one of the reasons now that Intel hasn't opened the flood gates and let Broadwell out into the wild. The problem is that the board makers have moved on to develop the next-generation boards for that impending launch and are struggling to go back and update all the old boards. Broadwell has had an extremely rough time getting to market, but it is coming. Intel announced ten Broadwell processors earlier this month and while that sounds like a ton of processors, only two are socketed LGA1150 Broadwell. The two Broadwell LGA desktop processors are the Intel Core i7-5775C and the Core i5-5675C. Both parts are unlocked like the 'K' processors have been in the past. Intel never told us why they changed from 'K' to 'C' for these processors, but it's likely because the Iris Pro Graphics 6200 solution was codename Crystal Well internally. Those processors were announced over two weeks ago, but they won't be readily available in the channel until July. Since they are only now starting to become available for purchase and the reviews on those processors are few and far between.
- Intel Core i7-5775C – $366 – 4 physical cores with 8 total threads, a base clock speed of 3.3GHz and 3.7GHz Turbo, 6MB of L3 cache, and Iris Pro 6200 graphics
- Intel Core i5-5675C – $276 – 4 physical cores with 4 total threads, a base clock speed of 3.1GHz and 3.6GHz Turbo, 6MB of L3 cache, and Iris Pro 6200 graphics
Intel Z97 Test System For Broadwell 5775CBefore we look at the numbers, let's take a brief look at the test system that was used. All testing was done on a fresh install of Windows 8.1 Pro 64-bit and benchmarks were completed on the desktop with no other software programs running. These platforms are aimed at mainstream users and all feature integrated graphics, so it will be interesting to see how the systems compare. We will use an NVIDIA GeForce GTX 780 Ti reference card for discrete gaming performance tests. The Intel Z97 platform that we used to test the Intel 1150 processors was running the ASUS Z97-A motherboard with BIOS 2401 that came out on 04/24/2015. The Corsair Dominator Platinum 8GB 2133MHz memory kit was set to XMP 1.3 memory profile settings, which is 1.65v with 9-11-11-31 1T memory timings. The Corsair Neutron GTX 240GB SSD uses 19nm NAND and was using M311 firmware.
|Intel LGA1150 Test Platform|
Intel Pentium G3258
|ASUS Z97-A||Click Here|
|8GB Dominator 2133MHz||Click Here|
|Corsair Neutron GTX 240GB SSD||Click Here|
|Corsair H105||Click Here|
|Corsair K95||Click Here|
|Corsair M95||Click Here|
|Corsair AX860i||Click Here|
|Windows 8.1 64-Bit||Click Here|
Intel Core i7-5775C Processor Overclocking
The Intel Core i7-5775C is capable of hitting 3.7 GHz by default thanks to the Intel Turbo boost mode.
We overclocked the Intel Core i7-5775C processor by simply increasing the multiplier and raising the voltage on the processor when needed. The UEFI microcode for enabling eDRAM selections and overclocking was not available in the build for the board that we have, so we left that alone for the time being (We'll do an article on that later). By just raising the multiplier we were able to get to 4.1 GHz without needing to increase the voltage. To hit 4.2 GHz we had to increase the voltage to 1.3V and then to hit 4.3GHz we had to increase it again to 1.35V. We were able to get 4.4 GHz up and running on the desktop, but it would crash in very CPU intensive benchmarks. We went up to 1.425V on the processor and couldn't get it stable at 4.4 GHz before calling it quits and we just benchmarked everything in our test suite at 4.3GHz.
We later learned that you can put more voltage to the processor without blowing it up right away and was able to get 4.4GHz stable at 1.475V. If you want to run 4.6-4.7GHz on one of these processors you need to run around 1.6V on the core and that is something we weren't interested in doing and you'll see why when we get to the power consumption section!
Intel Core i7-5775 Overclocking Expectations:
- 4.1 GHz - 1.225V
- 4.2 GHz - 1.3V
- 4.3 GHz - 1.35V
- 4.4 GHz - 1.475V
- 4.6 GHz and beyond - 1.6V (not recommended for normal use)
With the Intel Core i7-5775C processor running 4.3GHz we were able to score 899 on the CPU test in Cinebench. We got a score of 785 stock, so this is a nice 14.5% performance gain from this 600MHz clock frequency boost that equates to a 16% overclock. All of the performance charts in the review show the Intel Core i7-5775C at both stock and overclocked (4.3GHz), so please reference those in the pages ahead to see how the chip performs in a wider variety of benchmarks.
With the Intel Core i7-5775C running at 4.3 GHz with 1.35V to the core we hit 68C on the Corsair Hydro Series H105 CPU Water Cooler that we were using on the test bench. Not a bad temperature at all for this overclock!
Let's see how the Intel Core i7-5775C Broadwell processor performs at both stock speeds and at 4.3GHz!
SiSoftware Sandra 2015 SP2
The Sisoft Sandra 2015 SP2 benchmark utility measures pretty much all of your system components, but we'll be using it to focus on memory and CPU performance! As you can see from our memory testing chart above all the processors with dual channel memory kits perform roughly the same since we are using the same Corsair 2133MHz DDR3 memory kit. The Intel Core i7-5775C had 27.42 GB/s of memory bandwidth at default clock speeds and then 27.45 GB/s when overclocked to 4.3GHz. We didn't expect any change on the memory bandwidth when we overclocked this processor as we just raised the multiplier and didn't touch the base clock or memory divider to alter the effective memory clock frequency. The Intel Core i7-5775C scored 228.90 MPixels/s in stock form and that jumped up by 14% to 261.53 MPixels/s when overclocked to 4.3 GHz on all cores. Results: All the new mainstream and high-end desktop processors support AES-NI and the Core i7 5775C scored 8.17 GB/s for this AES benchmark test, which is pretty damn good! Results: In the Sandra 2015 SP2 CPU Arithmetic Benchmark the Intel Core i7-5775C Broadwell processor scored 117.20 GOPS in stock form and when overclocked we were able to get 141.67 GOPS. This is an improvement of 20.8% due to the overclock.
x264 HD Encoding
Euler3d CFD BenchmarkNext up is the STARS Euler3d CFD benchmark. The benchmark is intended to provide information about the relative speed of different processor, operating system, and compiler combinations for a multi-threaded, floating point, computationally intensive CFD code. The benchmark test case is the AGARD 445.6 aeroelastic test wing. The wing uses a NACA 65A004 airfoil section and has a panel aspect ratio of 1.65, a taper ratio of 0.66, and a 45 degree quarter-chord sweep angle. This AGARD wing was tested at the NASA Langley Research Center in the 16-foot Transonic Dynamics Tunnel and is a standard aeroelastic test case used for validation of unsteady, compressible CFD codes.
HandbrakeHandBrake is an open-source, GPL-licensed, multiplatform, multithreaded video transcoder, available for MacOS X, Linux and Windows. It is popular today as it allows you to transcode multiple input video formats to h.264 output format and is highly multithreaded.
PCMark 8We ran the PCMark 8 Home benchmark, which includes workloads that reflect common tasks for a typical home user. These workloads have low computational requirements making PCMark 8 Home suitable for testing the performance of low-cost tablets, notebooks and desktops. Home includes workloads for web browsing, writing, gaming, photo editing, and video chat. The results are combined to give a PCMark 8 Home score for your system. PCMark 8 Home Accelerated Test Results:
|Web Browsing - JunglePin||0.315s||0.353s||0.351s||0.310s||0.310s||0.305s|
|Web Browsing - Amazonia||0.134s||0.139s||0.139s||0.134s||0.134s||0.133s|
|Photo Editing V2||0.704s||0.331s||0.304s||0.350s||.321s||0.128s|
|Video Chat Playback||30 fps||30 fps||30 fps||30 fps||30 fps||30 fps|
|Video Chat Encoding||133.3ms||49.7ms||37.7ms||48.0ms||43.0ms||37.0ms|
|Casual Gaming||23.0 fps||34.8 fps||35.1 fps||35.9 fps||36.4 fps||67.1 fps|
POV-Ray 3.7Processor Performance on Pov-Ray 3.7: The Persistence of Vision Ray-Tracer was developed from DKBTrace 2.12 (written by David K. Buck and Aaron A. Collins) by a bunch of people (called the POV-Team) in their spare time. It is a high-quality, totally free tool for creating stunning three-dimensional graphics. It is available in official versions for Windows, Mac OS/Mac OS X and i86 Linux. The POV-Ray package includes detailed instructions on using the ray-tracer and creating scenes. Many stunning scenes are included with POV-Ray so you can start creating images immediately when you get the package. These scenes can be modified so you do not have to start from scratch. In addition to the pre-defined scenes, a large library of pre-defined shapes and materials is provided. You can include these shapes and materials in your own scenes by just including the library file name at the top of your scene file and by using the shape or material name in your scene. Since this is free software feel free to download this version and try it out on your own. The most significant change from the end-user point of view between versions 3.6 and 3.7 is the addition of SMP (symmetric multiprocessing) support, which, in a nutshell, allows the renderer to run on as many CPU's as you have installed on your computer. This will be particularly useful for those users who intend on purchasing a dual-core CPU or who already have a two (or more) processor machine. On a two-CPU system the rendering speed in some scenes almost doubles. For our benchmarking we used version 3.7 RC5, which is the most recent version available. The benchmark used all available cores to their fullest extent to complete the render.
Once rendering on the object we selected was completed, we took the elapsed time from the dialog box, which indicates the exact time it took for the benchmark to finish the benchmark and a score in PPS. We are using the final CPU score for our benchmarks and a higher value indicates faster system performance.
MAXON; CINEBENCH R15:MAXON CINEBENCH Release 15 is an advanced hardware testing suite that assesses a computer's performance capabilities. CINEBENCH is based on the same powerful technology as MAXON's award-winning animation software CINEMA 4D, which is used extensively by studios and production houses worldwide for 3D content creation. MAXON software has been used in blockbuster movies such as Iron Man 3, Oblivion, Life of Pi or Prometheus and many more. The new version of CINEBENCH includes the ability to more accurately test the industry’s latest hardware, including systems with up to 64 processor threads, and the testing environment better reflects the expectations of today’s production demands. A more streamlined interface makes testing systems and reading results incredibly straightforward. Again, higher Frames/Second and point score equal better performance.
Cinebench R15 was able to put a 100% load across all the cores on all of the processors, which makes this a great benchmark to look at multi-core platforms. Benchmark Results: When it comes to OpenGL graphics performance the Intel Core i7-5775C Broadwell processor with Intel Iris Pro Graphics 6200 dominated the other processors in the OpenGL Benchmark by a mile. The new graphics solution with 128MB of eDRAM finally put Intel ahead of Intel with regards to integrated graphics performance for the first time since Legit Reviews started in-depth hardware reviews way back in 2002. For those that are wondering why we don't have Intel Core i7 2700K results, it is because the Intel HD 3000 graphics on that processor are not supported by the OpenGL benchmark. Benchmark Results: The fifth generation Intel Core i7-5775C processor scored 785 points when using all of the available cores and had a score of 151 on just one. With the Intel Core i7-5775C Broadwell processor overclocked the multi processor test score went up to 899 and the single processor score jumped up to 176! This put the performance of the 5775K right next to that of the 4790K!
TrueCryptTrueCrypt is sort of discontinued, but it was once a widely available freeware utility used for on-the-fly encryption (OTFE). It can create a virtual encrypted disk within a file or encrypt a partition or (under Microsoft Windows except Windows 8 with GPT) the entire storage device (pre-boot authentication). On 28 May 2014, the TrueCrypt website announced that the project was no longer maintained and recommended users to find alternate solutions. Since that announcement was made Thomas Bruderer and Joseph Doekbrijder have stepped forward with plans to revive the project through the truecrypt.ch site, which is offering downloads of TrueCrypt 7.1a – which can encrypt and decrypt data, and was the latest version prior to 7.2. We are using the benchmark built-in TrueCrypt 7.1a with default settings to figure out the mean AES speed for each of the processors being tested with a 50MB buffer size. Benchmark Results: The Intel Core i7-5775C does well on the Advanced Encryption Standard (AES) benchmark test and scored 4.3 GB/s in stock form and 5.2 GB/s when overclocked up to 4.3GHz. The Intel Core i7-5775C overclocked to 4.3GHz had the same level of performance as the Intel Core i7-4790K!
3DMark 2013 w/ Integrated Graphics
Futuremark 3DMark has three primary benchmark tests that you can run and which test you should be running depends on the system that you are benchmarking on.
- Ice Storm - For mobile devices and entry-level PCs
- Cloud Gate - For notebooks and home PCs
- Fire Strike - For gaming PCs (extreme mode for those with multiple GPUs)
Metro Last Light w/ Integrated Graphics
Metro: Last Light is a first-person shooter video game developed by Ukrainian studio 4A Games and published by Deep Silver. The game is set in a post-apocalyptic world and features action-oriented gameplay with a combination of survival horror elements. It uses the 4A Game engine and was released in May 2013. Metro: Last Light was benchmarked with low image quality settings with the SSAA set to off, Tesselation disabled and and 4x AF. We used the game titles built-in benchmark (seen above) and ran it 3 times at each screen resolution to ensure accurate results. Benchmark Results: We Metro: Last Light at Metro Last Light at 1920x1080 with low image quality settings and the Intel Core i7-5775C was leaps and bounds faster than the Intel Core i7-4790K. In fact, the 5775C was found to be nearly 2.4x faster than the Intel Core i7-4790K! It was also faster than the AMD A10-7800 APU, so Intel now appears to be leading the pack when it comes to integrated graphics performance. We were a actually able to play Metro Last Light at a normal 1080P display and have it playable, albeit we were on low image quality settings with all the eye candy disabled.
Metro Last Light w/ GeForce GTX 780 Ti
Metro: Last Light is a first-person shooter video game developed by Ukrainian studio 4A Games and published by Deep Silver. The game is set in a post-apocalyptic world and features action-oriented gameplay with a combination of survival horror elements. It uses the 4A Game engine and was released in May 2013. Metro: Last Light was benchmarked with very high image quality settings with the SSAA set to off, Tesselation on normal and 4x AF. We used the game titles built-in benchmark (seen above) and ran it 3 times at each screen resolution to ensure accurate results. Benchmark Results: In Metro: Last Light with the NVIDIA GeForce GTX 780 Ti discrete desktop graphics card installed in the system we found a rather small difference between the Intel Core i7-4770K, 4790K and 5775C. All were similar when it came to the average FPS, which is a good thing for the Core i7-5775C Broadwell processor as it has a base clock of 3.3GHz versus the 4.0GHz base clock on the 4790K. It looks like the Core i7-5775C is able to hang in game titles with the other big boy processors despite have a significantly lower base clock and less L3 cache. (6MB versus 8MB on the 4770K & 4790K). The one thing that might be really helping the Core i7-5775C keep up is the 128MB of eDRAM that it has! We'll be looking at gaming performance more in-depth once we get a newer UEFI/BIOS version as the one we have now wouldn't work with a discrete graphics card with the system being overclocked. Our platform wouldn't post when overclocked with a discrete GPU installed, so we'll have to save that testing for another day. Benchmark Results: With the screen resolution bumped up to 1920x1080 we found that the average FPS dropped down to the mid 80's, but the game was still playable as the minimum frame rate never dropped below 35 FPS on and of the quad-core processors. The differences between the Haswell and Broadwell processors is negligible at 1080P and we couldn't tell a difference when gaming on the Core i7-5775C and Core i7-4790K on the handful of games we tried out with a discrete graphics card.
Intel Core i7-5775C CPU Temperature TestingIntel no longer comments on the Thermal Interface Material (TIM) material that they use on processors, but we are confident in saying that it would be safe to assume the Intel Core i7-5775C processor use Next-Generation Polymer Thermal Interface Material (NGPTIM) like the Core i7-4790K Devil's Canyon processor uses. The lid isn't soldered down like it once was, but at least Intel is using the better TIM on this processor! We used the Intel Extreme Tuning Utility v5.2 to monitor the temperatures on our test system with the Corsair H105 water cooler along with Gelid Extreme Thermal Compound. The Intel Core i7-5775C processor sitting on the desktop at an idle was at 30-31C and the voltage was at 0.6780V. This is a great idle temperature as the room temperature was pushing 26C here in the summer with all the test systems running. When we ran a run of POV-Ray 3.7 across all the CPU cores we saw that it the processor temperature topped out at 52C and the voltage jumped up to 1.1840V. That isn't a bad load temperature at all! We really debated on if this temperature chart should be used or not since the ambient temperature is tough to keep consistent in our lab during the summer. Despite being 1-2C at most different in ambient temperature, you can still see huge differences between the processors at load on the same board, CPU cooler and thermal compound.
Power ConsumptionPower efficiency remains important to PC users and Intel and AMD have both made great strides to improve power efficiency. There are nearly a dozen processors in our power chart, but keep in mind some of the TDP's of the processors:
- Intel Pentium G3258 - 53 Watts
- AMD A10-7800 - 65W
- Intel Core i7-5775C - 65W
- Intel Core i7-3770K - 77W
- Intel Core i7-4770K - 84W
- Intel Core i7-4970K - 88 W
- Intel Core i7-2700K - 95W
Final Thoughts and ConclusionsAfter using the Intel Core i7-5775C 'Broadwell' processor for the past week it really is a shame that Intel couldn't have launched this processor last year. The Core i7-5775C processor is stock form isn't clocked high enough to give the Intel Core i7-4770K or Core i7-4790K 'Haswell' processors anything to worry about, but the integrated graphics performance is nothing short of amazing. The Intel Iris Pro Graphics 6200 solution was able to dramatically improve the graphics performance that one can expect from Intel. Intel really boosted the graphics performance with this design as they went from having 20 EU's on the 4790K to having 48 EU's along with 128MB of eDRAM on the Core i7-5775C. If you were building a platform right now and was going to run integrated graphics, this is the processor for you. If you were running discrete graphics and looking to build a new system it's a little tougher as Haswell performs better thanks to the higher clock speeds and both the 4770K and 4790K are priced lower than the 5775C. When it comes to overclocking we were easily able to take the Intel Core i7-5775C up to 4.3GHz by simply increasing the CPU multiplier up to 43 and bumping the voltage up to 1.35V. The overclock was rock solid and out CPU temperature never broke 70C, but the negative was that it threw the power efficiency all to heck. Our 16.2% overclock from the Turbo clock rating had us using 54.4% more power at load. It also used more at idle and since we were using more power it was running hotter and that increases the fan noise as everything ramps up to compensate. So, overclocking is easy on the Core i7-5775C, but you basically take your 65W TDP processor and turn it into one that is likely pushing 80W or more depending on the clock speeds and voltage you end up using. That sounds bad, but you basically just end up where the high-end Haswell parts are at. At the end of the day Intel 8 series motherboard owners likely won't be able to upgrade to Broadwell and current Intel 9 series owners already have a Haswell processor. That limits Broadwell buyers to those that don't have a system and are looking to build one this year on a mature platform. The Intel Core i7-5775C processor is a very nice processor, but many will likely skip it and build a new system with Skylake later this summer. That really is a shame as the Intel Core i7-5775C is a solid processor that shows where Intel is headed. Intel has now proven that they can put a beefy integrated graphics solution into an unlocked socketed desktop processor. Now that they have graphics power to play games it will be interesting to see how their drivers support new game titles as they come out. Intel hasn't had to worry about day one drivers for games in the past, but with graphics like this those days might be coming to an end!
Legit Bottom Line: The Intel Core i7-5775C Processor shows that Intel is the company to beat with regards to integrated graphics performance!