|Gigabyte GV-NX98X1GHI-B GeForce 9800 GX2 Video Card|
|Reviews - Featured Reviews: Video Cards|
|Written by Olin Coles|
|Tuesday, 25 March 2008|
Page 16 of 18
GeForce 9800 GX2 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 as the newest 9th generation GeForce products are made available. Once published, you can expect more detailed information than what is shown below, as for now the temperatures depicted are GPU core temperatures at idle and under load.
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 comfortable 20.0°C and the inner-case temperature hovered around 32°C. At default speeds the Gigabyte GV-NX98X1GHI-B GeForce 9800 GX2 video card recorded 59°C in idle 2D mode, and increased to 78°C in full 3D mode. After recording the GPU temperatures at stock settings, I measured the temperatures as reported by ATITool once overclocked. With the extra heat added from the overclock, the 9800 GX2 rested at 62°C in idle 2D mode, and increased to 80°C in full 3D mode. Overall, this increase in negligible.
While heated air still an issue because it gets re-circulated back into the case, there is a small portion that is exhausted away outside. While 80°C isn't terribly hot, it's not nearly as cool as we saw temperatures in the ZOTAC GeForce 8800 GT AMP! Edition which is based on the same GPU. Even so, recirculated air is still exactly that, and 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.
9800 GX2 Power Consumption
Planet Earth is needs our help, badly. With forests becoming a barren of vegitation and snow capped poles quickly browning, the technology industry has a new attitude towards becoming "green". I'll spare you the marketing hype that I get to sift through from the various manufacturers, and get right to the point: your CPU does a lot more to save the planet than your GPU is doing, but NVIDIA is working to change that problem. While current Intel central processing units are using a power-efficient 24nm die process size, the graphics processor is a bit slower to catch the technology curve and presently only shrinks to 65nm in the G92. Below is a chart with the total watts consumed by our specified test system:
NIVIDA has designed the G92 graphics processor to be an efficient cornerstone to the 9th Generation of GeForce products, which does inherently give it an efficiency advantage, but we are slow to hear of such features like speed step scaling for the GPU. It would also be a nice idea to have Gigabyte's Dynamic Energy Saver (DES) functionality on a graphics card.
Please continue to the review conclusion in the next section, where I share my thoughts on the Gigabyte GV-NX98X1GHI-B GeForce 9800 GX2 and give my opinion of the new high-level king.