![]() Our fan noise was measured on an open test bench and the exact settings can be seen here. Here we see how a fan speed increase from 45% (1700 RPM) to 50% (2000 RPM) can have a dramatic impact on temperatures with a little additional fan noise. Notice that the fan speed is at 45% for this test using vBIOS 70.00.18.00.01 on the GTX 480 video card.Īfter flashing our GeForce GTX 480 with vBIOS 70.00.19.00.02 we noted that the temperature dropped down 10C thanks to the fan speed profiles being changed. This is a little lower than what we saw originally, but the ambient room temperature was different and we have the test system in a different spot in the room. With the old vBIOS installed and the latest ‘fixed’ version of GPU-Z running we were hitting 84C at an idle with two monitors installed. This is a 7C drop from the very first time we ran the idle test and is thanks to the corrected version of GPU-Z and BIOS improvements. With one monitor installed the GeForce GTX 480 would idle at 50C on the new BIOS. Let’s take a quick look to see if the lastest BIOS build from NVIDIA fixed our heat issues as the new vBIOS includes some new fan profiles. This should resolve the mis-programming of fans, but even with the new GPU-Z our card would still get up to 85-90C at an idle with two monitors. The new version of GPU-Z is due out anytime now to the public and does all accesses for board/temp info through NVAPI, so it doesnt clash with NVIDIA driver. We got a new build from GPU-Z’s author and sure enough all the crashing we had went away. NVIDIA has asked GPU-Z to use NVAPI to avoid these conflicts. This is interfering with NVIDIA’s fan control algorithm and causing video cards to crash when GPU-Z is run in the background. NVIDIA informed Legit Reviews that upon low-level examination of the GPU-Z application, that they have determined that it is not using their NVAPI for all temperature/fan control calls, but is instead banging registers directly. We were also made aware that the random crashes and high temperatures that some reviewers were seeing was due to GPU-Z. 70.00.19.00.02 – Mass Production Release Candidate 2.70.00.18.00.01 – Mass Production Release Candidate.70.00.10.00.01 – BIOS the media used for reviews.NVIDIA GeForce GTX 480 Reference Video Card BIOS Revisions: ![]() The engineers at NVIDIA were kind enough to let us try the latest vBIOS build and the BIOS upgrade process was quick and easy just like last weeks update that we tried, but did not reduce the temperatures.
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