Thermal Performance
To thermally test the cards we recorded GPU temperatures for each individual core using RivaTuner. Idle readings were taken at the desktop in Windows Vista 64-bit Home Premium with Windows Aero enabled, while the load reading taken while the GPU configuration was running our
Crysis benchmark at 1,920 x 1,200 with 0xAA.
This is one of the most demanding tests in our benchmarking suite, and is sure to get those GPUs sweating. We didn't go higher because we felt that if we increased the load too much, some of the slower cards wouldn't deliver realistic numbers because they'd be bottlenecked in other ways.
All temperatures were taken with the cards cooled using only their standard stock coolers and running on our open air test benches, which have no additional airflow other than that present in the room.
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BFG Tech GeForce GTX 285 OCX 1GB
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Zotac GeForce GTX 285 1GB AMP!
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Nvidia GeForce GTX 285 1GB
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Sapphire ATI Radeon HD 4850 X2 2GB
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Nvidia GeForce GTX 260-216 896MB
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Nvidia GeForce GTX 260-216 896MB SLI
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Nvidia GeForce GTX 280 1GB
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Nvidia GeForce GTX 295 1,792MB
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Nvidia GeForce GTX 280 1GB SLI
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ATI Radeon HD 4870 X2 2GB
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ATI Radeon HD 4870 512MB
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ATI Radeon HD 4870 1GB
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ATI Radeon HD 4870 1GB CrossFire
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Temperature (°C)
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Sapphire ATI Radeon HD 4850 X2 2GB
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ATI Radeon HD 4870 1GB CrossFire
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Nvidia GeForce GTX 260-216 896MB
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Nvidia GeForce GTX 260-216 896MB SLI
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Zotac GeForce GTX 285 1GB AMP!
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ATI Radeon HD 4870 X2 2GB
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Nvidia GeForce GTX 285 1GB
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Nvidia GeForce GTX 280 1GB
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BFG Tech GeForce GTX 285 OCX 1GB
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Nvidia GeForce GTX 295 1,792MB
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ATI Radeon HD 4870 512MB
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Nvidia GeForce GTX 280 1GB SLI
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ATI Radeon HD 4870 1GB
0
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20
30
40
50
60
70
80
90
Temperature (°C)
Thermal performance falls in line with expectations as well - we saw a 1°C increase in load temperature, while the idle temps remained the same as those we recorded for both the Zotac and Nvidia reference GeForce GTX 285 cards.
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