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Cooling System

The card is equipped with the same cooler as we saw on the Gainward Bliss 8800 GT 512MB GS GLH. This dual-slot cooler is silent and far superior to the single-slot cooler of the reference card, especially in its first version, in terms of cooling performance.

The cooler has a massive aluminum heatsink with a large ribbing area. It contacts with the GPU by means of two heat pipes that carry heat from the copper sole. The fan is installed rather unusually under the heatsink. So, we’ve got the following airflows here:

This solution is questionable from an aerodynamic point of view, but this cooler proves good in practice, also because it gets some cold air through the slits in the mounting bracket. Another good point about this cooler is that is additionally cools the PCB and its components although the heatsink on the power circuit elements gets little airflow due to the row of electrolytic capacitors. The fan uses a 4-pin connection with PWM-based regulation of speed but works at a constant speed. The cooling efficiency is high because the heat pipes have good contact with the sole and heatsink using high-quality thermal grease.

The cooler’s sole that contacts with the GPU is fastened to the PCB with four screws like the heatsink’s casing. The whole thing is very rigid, so there is no risk of damaging the GPU die. The memory chips being located on both sides of the PCB, there is an additional heat-spreading plate on the reverse side of it. Elastic thermal pads ensure proper thermal contact with the chips.

The defect we noticed in the cooler of our Bliss 8800 GT 512MB GS GLH proved to be a defect of the particular sample of the card, and the cooler of the Bliss 8800 GT 1024MB GS is blameless. Although its design is questionable, it is really superior to both versions of the reference cooler from Nvidia in efficiency.

 
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