NVIDIA has told TomsHardware that the driver’s behavior with overclocking tools is indeed a software bug and they’re working on an updated driver package to fix it.
The folks at EVGA also act quickly by updating their utility to version 1.9.1, and you may click here to download.
Yesterday NVIDIA updated its GeForce/ION driver to 196.21 WHQL versionÂ which includes SLI and multi-GPU support for many new gaming titles as well asÂ some bug fixes, but several users have found that after upgrade they’re unable to overclock any more.
Expreview did a small test to check out if it’s true. We run the test with Galaxy GeForce GT240 under Windows 7 64-bit operating system, and used the following four popular overclocking utilities to see what would happen.
* Galaxy MagicPanel HD
* MSI AfterBurner V1.5.0 Beta 5
As you can see, RivaTuner V2.24C just allowed us to tweak GPU clock and memory clock,Â while oddly, the shader clock just disappeared.
EVGA Precision V1.9.0
We had the same problem with the newly released EVGA Precision V1.9.0 – the shader clock can’t be tweaked either.
Galaxy MagicPanel HD
Things get even worse with MagicPanel HD – none of the core/shader/memory clock can be tweaked.
MSI AfterBurner V1.5.0 Beta 5
MSI AfterBurner V1.5.0 Beta 5 was the only software which “survived” during our test – everything works great.
Why the new driver won’t allow overclocking? The only reason that we could think of is the new driver was specially optimized for NVIDIA’s upcoming Fermi-based VGA cards, making it working against the current overclocking software.
If you feel the need to overclockÂ your NVIDIA cards, we suggest you to stick with an earlier driver version or use the latest AfterBurner utility until the problem is resolved.