vacancies advertise contact news tip The Vault
facebook rss twitter

AMD Radeon HD 6970 and HD 6950 2GB graphics card review

by Tarinder Sandhu on 15 December 2010, 18:49 3.5

Tags: AMD (NYSE:AMD), HiS Graphics

Quick Link:

Add to My Vault: x

Overclocking Cayman

We now know all about stock-clocked performance. So just how much headroom does Cayman have? First on the testbench is the Radeon HD 6950. There's no voltage adjustment, so it's a case of ramping up the clocks until the card fails to complete a single loop of either Aliens vs. Predator or Just Cause 2, run at 2,560x1,600 settings. We ramp the fan-speed up to 60 per cent of maximum.

Click to enlarge

Healthy rises for both the core and memory, jumping from the default 800MHz/5,000MHz to 900MHz/5,500MHz without issue. That's over 10 per cent on both lines.

Click to enlarge

Switching cards and putting the HD 6970 on the rack, the card tops out at 948MHz core and 5,800MHz memory - representing a slightly lower jump in percentages above stock.

Here's how the overclocked cards play out in the two above-mentioned games:

The overclocked HD 6950 is able to almost catch the stock HD 6970 - the lack of shaders and texture units compromising higher frequencies - while the overclocked HD 6970 gets closer to GTX 580.

Just Cause 2 is more partial to frequency changes, as the HD 6950 OC just about overtakes the bone-stock HD 6970. What we can say is that AMD will not regain the single-GPU crown with pre-overclocked HD 6970s; GTX 580 is just too far ahead.