|ZOTAC GeForce 8800 GT 512MB Video Card|
|Reviews - Featured Reviews: Video Cards|
|Written by Olin Coles|
|Sunday, 30 December 2007|
Page 10 of 11
GeForce 8800 GT Temperatures
This section is probably the most popular for me, as a reviewer. Benchmark tests are always nice, so long as you care about comparing one product to another. But when you're an overclocker, or merely a hardware enthusiast who likes to tweak things on occasion, there's no substitute for good information.
Benchmark Reviews has a very popular guide written on How To Overclock the NVIDIA GeForce 8800 Series, but it was published shortly after the 8th generation of GeForce products was launched. Currently we are preparing for a more updated article, with additional information on shader overclocking and temperature control.
Once published, you can expect more information like you see below for several different video cards.
To begin my testing, I used ATITool v0.26 to record GPU temperatures at idle and again at high-power 3D mode. The ambient room temperature was a cool 18.2°C and the inner-case temperature hovered around 30°C. The ZOTAC GeForce 8800 GT 512MB video card recorded 56°C in idle 2D mode, and increased to 93°C in full 3D mode. After recording the GPU temperatures as reported by ATITool, I used my Extech Instruments EX-450 IR Non-Contact Thermometer to capture the exhaust vent temperatures. At idle, the ZT-88TES2P-FSP produced 41°C and under full load it increased to 69°C.
What becomes clear to me is how much heated air is re-circulated back into the case. The unfortunate truth is that it's exhausted into an area close to the expansion slot mounting plate, where very few fans can cool. Fortunately for me however, the Lian Li PC-B20A Aluminum Mid-Tower ATX Case I used to record these results has the BS-03 kit (included optional patent cooling slot kit) which mounts directly in front of the exhaust port on the graphics card and draws the heated air directly out of the case.
8800 GT Temperature Zones
Using the non-contact IR thermometer to record temperatures on the "top" side (when mounted into the motherboard) I discovered several hot spots in unlikely locations. If you study the image above, which uses the reference NVIDIA GeForce 8800 GT circuit board layout, you'll discover that the right side of the video card is seriously under-cooled.
The detailed high-resolution temperature zone image is available to anyone who wishes to request it via e-mail only, but the image above should give an excellent idea as to where an overclocker may want to give extra attention in their next project.
Continue to the conclusion in the next section, where I share my thoughts on the ZOTAC ZT-88TES2P-FSP and give more comparative details between the new mid-level king.