Legit Processor Reviews

Intel Pentium G850 Sandy Bridge 2.9GHz CPU Review

Manufacturer: Intel
Product: Intel G850 w/ PN: BX80623G850
Date: Mon, Aug 08, 2011 - 12:00 AM
Written By: Nathan Kirsch -
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Total System Power Consumption

CPU Power Consumption

Since power consumption is a big deal these days, we ran some simple power consumption tests on our test beds. The systems ran with identical power supplies, Solid-Sate Drives, Memory kits and motherboards from the same company. To measure idle usage, we ran the system at idle for one hour on the desktop with no screen saver and took the measurement. For load measurements, Prime95's in-place large FFT's were run on all cores to make sure each and every processor was at 100% load for maximum power consumption and heat. Curious about other test  scenarios, we decided to 3DMark Vantage the performance preset and took the maximum power consumption during the first GPU test. We also tested a video transcode using HandBrake 0.95 to see how the power draw on that was.

ASUS F1A75-M Pro System Power Consumption

Benchmark Results: We expected the Intel Pentium G620 and G850 to be nearly identical on power conumption as both are 65W TDP processors and share the same core design and idle clock speeds. We found exactly that in our power tests and even saw that the Intel Pentium G850 was more power efficient than the Intel Pentium G620 that is 300MHz slower. No two chips are the same and the efficiency of the processor varies due to their location on the wafer when they were produced.  Some areas on the wafer have more leakage than others and that is why no two processors have the same temperatures as well. The Intel Pentium G850 was likely screened with tighter tolerances and just happened to have less leakage on a transistor or gate level than the G620 that we have.  It's also safe to assume that the Intel Pentium G620 was fallout that didn't pass the testing to become an Intel Pentium G850 processor!

Next Page - Intel Pentium G850 Temperature Testing


Review Index
Page 1 - Intel Pentium G850 Processor Review
Page 2 - The Test System
Page 3 - CPU-Z, GPU-Z and Windows Index Score
Page 4 - SiSoftware Sandra 2011 SP3
Page 5 - x264 HD Encoding
Page 6 - CyberLink MediaEspresso 6.5
Page 7 - Handbrake
Page 8 - POV-Ray 3.7 RC3
Page 9 - Cinebench R11.5
Page 10 - PCMark 7
Page 11 - 3DMark Vantage
Page 12 - Resident Evil 5
Page 13 - H.A.W.X. 2 Benchmark
Page 14 - S.T.A.L.K.E.R.: Call of Pripyat
Page 15 - Discrete Graphics Card Performance
Page 16 - Total System Power Consumption
Page 17 - Intel Pentium G850 Temperature Testing
Page 18 - Intel Pentium G850 Overclocking
Page 19 - Final Thoughts and Conclusions