PNY XLR8 8800 GTX OC

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Overclocking

Before we concluded our testing, we spent a little time overclocking the PNY XLR8 8800 GTX OC using the clock frequency slider available within the NVIDIA control panel after the nTune utility had been installed. 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. nTune currently doesn't allow individual modification of the shader clock.

After some time, we finally arrived at a final overclock of 630 MHz for the core (up from 621 MHz) and 1100 MHz for the memory (up from 1000 MHz). This was the highest overclock we were able to achieve with perfect stability. Attempting to raise the core or memory frequency higher, even by 2-3MHz resulted in crashs and lock-ups during full-load scenarios such as benchmarking. Overall, we are quite impressed with the overclock we achieved.

Overclocking t he PNY XLR8 8800 GTX OC
Faster Than a 8800 Ultra

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PNY XLR8 8800 GTX OC Overclocked: 630MHz GPU / 1.1GHz Memory
PNY XLR8 8800 GTX OC Stock: 621MHz GPU / 1.0GHz Memory

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PNY XLR8 8800 GTX OC Overclocked:630MHz GPU / 1.1GHz Memory
PNY XLR8 8800 GTX OC Stock: 621MHz GPU / 1.0GHz Memory

While we had the card overclocked, we re-ran a coupe of benchmarks to see how the higher clocks affected performance. Despite having already recieved a substantial overclock at the factory, the XLR8 still had quite a bit of headroom left. Our final overclock gave us core, shader and memory frequencies that were all substantially higher than those possessed by the vanilla 8800 GTX. The overclock even allowed the XLR8 to overtake the Ultra in clock frequency. Since there are no differences between the 8800 GTX and the 8800 Ultra, besides frequency, our overclocked XLR8 is superior in every way. The overclock allowed it to overtake the much more expensive 8800 Ultra in our Prey test, where it had previously lost to the Ultra. The XLR8 also consolidates its lead on the Ultra in our synthetic 3DMark test. 
Tags:  GTX, pny, XLR8, GT

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