ATI Radeon X850XT Platinum Edition AGP (R481)
Test configuration
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Test bench<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /> |
AGP |
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CPU |
AMD Athlon64 4000+ |
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MB |
ASUS A8V Deluxe BIOS 1009 |
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Memory |
DDR400 2x512MB
in the dual-channel mode
Latency timings – 2.5-8-4-4 |
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OS |
WinXP + SP2 + DirectX 9.0c |
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PSU |
ThermalTake Purepower 480W |
For benchmarking ATI RX850XT PE and RX800XT PE we used the most recent WHQL-drivers - Catalyst 5.4, and beta version of ForceWare 76.50 for GeForce 6800Ultra.
Overclocking
We overclocked the card with ATI Tray Tools.
Initially, we didn't build much hope for the card's overclocking capability because even without that top-end solutions normally run at the breaking point, and the default frequency of the chip is mostly dependent on the yield rate of chips able operating at a certain frequency. We relied more upon overclocking of the video memory - it runs initially at 1180 MHz DDR, while the memory default frequency at 1.6 ns is 1250 MHz DDR.
On the other hand, remembering our experiments on overclocking R480-based boards whose results proved not to be the most impressive (up to 570 MHz on Gigabyte RX850XT PE GPU, and up to 585 MHz on ASUS EAX850XT PE, whereas the video memory failed to overclock at all, in none of the cards), we took overclocking of this RX850XT PE specimen with a large part of skepticism.
However, the overclocking capabilities of this board surpassed all our boldest expectations. Without use of additional blowing or other modifications to the standard cooling (except for the replacement of the thermal interface with "Alsyl-3"), we were able to overclock ATI RX850XT PE on our regular open test bench (ambient temperature = 28 C) to as high as 587/1290 (!!!)MHz. The video memory offers simply fantastic overclocking, and the chip performs not worse. But note that our overclocking results do not apply to other similar boards. So, let's not refrain your curiosity and get down to the most interesting part - the benchmarking.
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