ATI Radeon X1650 XT with Native CrossFire
For our next set of performance metrics, we spent a little time overclocking the Radeon X1650 XT using the clock frequency sliders available within ATI's drivers, under the "Overdrive" tab.
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To find the card's peak core and memory frequencies, we slowly raised their respective sliders until we begun to see visual artifacts on-screen while running a game or benchmark, or until our test system was no longer stable.
Radeon X1650 XT - Overclocked Speeds: 601MHz Core / 759MHz (1.57GHz DDR) Memory
Radeon X16950 XT - Default Clock Speeds: 574MHz Core / 672MHz (1.34GHz DDR) Memory
Radeon X1650 XT - Overclocked Speeds: 601MHz Core / 759MHz (1.57GHz DDR) Memory
Radeon X16950 XT - Default Clock Speeds: 574MHz Core / 672MHz (1.34GHz DDR) Memory
When all was said and done, we were able to take the Radeon X1650 XT up from its default GPU core and memory clock speeds of 574MHz / 672MHz, to 601MHz / 759MHz, increases of 27MHz and 87MHz or 4.7% and 13%, respectively. With the card overclocked, we re-ran a couple of benchmarks to see what kind of performance had been gained. As you can see, F.E.A.R.'s framerate went up by 2 FPS and Prey's went up by 2.4 FPS. Nothing earth-shattering, but you won't hear us complain about free performance gains very often.
