Intel Core i7-3770 Ivy Bridge CPU

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GPU Performance

In the last three versions of 3DMark using the default settings, Intel's HD 4000 graphics scored in the same range as the Radeon HD 6550D, the better half of AMD's A8-3850 APU. We tested the HD 4000 with both DDR3-1333 and DDR3-1600 memory, but the faster RAM didn't make as much of an impact as it did with the HD 6550D.

At 1366x768 resolution and details set to low, the HD 4000 slaughtered its predecessor, the HD 3000. It delivered an impressive 65% increase in frame rate in Lost Planet 2 and a 53% boost in H.A.W.X 2. Using DDR3-1333, the HD 4000 was more or less a match for the HD 6550D, but faster DDR3-1600 memory favored AMD's chip greatly, giving it a substantial lead in two of the three games.

We encountered new lows in CPU usage during Flash and VC-1 Blu-ray playback, but disappointingly high results with an H.264-encoded Blu-ray and Quicktime trailer. The solution, at least for the Quicktime clip, was to switch software. We tried a few different playback apps (we use PowerDVD by default), but only XBMC helped, bringing CPU utilization down to 3%. Unfortunately this didn't help with Blu-ray playback as it's not supported by XBMC.

Our H.264 difficulties caused a 7W increase in power consumption by our estimation, and the energy efficiency during playback was higher than the Core i5-2500K Sandy Bridge, closer to that of AMD's A8-3850 APU.

GPU/Platform Power Consumption

Running on integrated graphics, the power consumption of our i7-3770K / DZ77GA-70K combination was rather poor at idle. Most H67 motherboards we've tested idle at ~20W when paired with an i5-2500K (the i7-2600K is similar), but the Ivy Bridge platform consumed 7W more. With the CPU on full load, stressing the GPU increased power consumption by 15W, about 5W more than the HD 3000. It's not a lot in absolute terms, but in the world of integrated graphics, it's substantial.

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