|Sapphire Radeon HD 4870 X2 Atomic ST-6026|
|Reviews - Featured Reviews: Video Cards|
|Written by Olin Coles|
|Thursday, 18 December 2008|
Page 12 of 14
Atomic 4870 X2 Heat Output
Asetek liquid cooling delivers exceptional thermal control, enabling the Sapphire Radeon HD 4870 X2 Atomic ST-6026 to deliver top-end performance at all the noise. For once, you can hear the sound effects of your favorite game instead of your cooling fans. The low-velocity air flow gently passed through the coolant radiator at a mere 30dB(a), the equivalent of someone whispering.
For this review, the CPU/pump unit was not attachéd to the Core i7 processor. This was primarily because Sapphire did not bother to design an LGA1366 mounting clip for the Nehalem processor which launched on November 2nd; six weeks ago.
Keeping the ambient room temperature steady at exactly 17.0°C and the inner-case temperature around 28°C, the testing begins. I used GPU-Z to record temperatures at idle and then switched to Furmark for high-power 3D mode.
At idle the Sapphire Radeon HD 4870 X2 Atomic recorded an extremely cool 43°C (compared to 76°C for the reference design). Once I began to use 3D mode (which asks for another 185 W) for roughly twenty minutes, the Sapphire ST-6026 slowly raised its operating temperature. At full load, the twin RV770's produced an impressively low operating temperature of 60°C (compared to the reference design that produced 92°C). Liquid-cooling enthusiasts should rejoice, as this is all the evidence needed to prove how superior it can be.
Please continue to the review conclusion in the next section, where I share my final thoughts on the RV770 graphics processor and give my opinion of the new Radeon HD 4800-series product offerings.