For testing power consumption, we took our test system and plugged it into a Seasonic Power Angel. For idle numbers, we allowed the system to idle on the desktop for 15 minutes and took the reading. For load numbers, we measured the peak wattage used by the system while running the game S.T.A.L.K.E.R. – Clear Sky at 1280×1024 resolutions with high image quality.
Power Consumption Results: The Radeon HD 4770 slightly more power when overclocked, but that is to be expected. At idle the card uses 9W more powere, which is 5% more than the default results. At load the difference is 13W, which again comes out to be a 5% higher power draw. So, for 5% more power consumption you get roughly 20% more performance. Not a bad as the Radeon HD 4770 512MB graphics card doesn’t comsume that much power at load anyway.
The ATI Radeon HD 4770 512MB video card is no slouch when it comes to overclocking performance, but the trick is that you will need to use RivaTuner in order to get great overclocks as Catalyst Control Center really limits how high you can reach. Since the Radeon HD 4770 512MB graphics card has only been out for two days we contacted Sami Makkinen this week for some Radeon HD 4770 overclocking tips in case we were missing something, but alas he hadn’t tried overclocking the card yet.
“Sorry but I didn’t have a chance to try 4770 overclocking yet. Based on what I hear from the GPG guys the 931MHz Core clock you mention is a good result!” – Sami Makkinen (AMD Professional Overclocker and creator of AMD Overdrive)
The 931MHz overclock that we were able to reach was only stable for 3DMark Vantage overclocking, but the 915MHz clock frequency was 100% stable for all games and benchmarks. We are happy with the overclock as 915MHz/1000MHz sure sounds and performs better than the default clocks of 750MHz/800MHz. The only thing really holding back the ATI Radeon HD 4770 is the number of stream processors and texture units. Sure you can crank the snot out of the clock frequencies, but you just don’t have the stream processors needed to compete with the higher-end graphics cards that run slower, yet have more stream processors. In the end who cares because this $99 graphics card just got much more interesting!
Legit Bottom Line: The Radeon HD 4770 comes out of the box running 750MHz/800MHz, but a little overclocking got that up to 915MHz/1000MHz with 100% stability!