Originally Posted by Redeemed
First things, never use any drivers beyond version 56.72 with that card.
So far I've had no problem with either the ASUS drivers or nVidia forceware drivers. The only problem with the ASUS drivers is they seem to cause a "minor" conflict with ASUS PcProbe- that is all. I've used both Coolbits and PowerStrip successfully.
If you are going to limit yourself to using old drivers, then yes you will likely have less overclocking issues.
But by doing so you may be missing out on at least two important points. The first being that older drivers have bugs and some serious issues with current games, etc. And the 56xx drivers you recommend had many issues with my Aopen 5900nu. One particular problem with the 56.72 driver was that it regularly refused to switch in or out of 2D and 3D modes. Caused stuttering and many other associated problems. And although this particular problem may not have much affect on a ASUS 5950u since it doesn't have a 2D mode, the fact that this type of simple but infuriating problem exists indicates that the driver is buggy and therefore is not to be trusted. No matter how many of the 5xxx drivers I tried, for general use I actually kept going back to 53.03 because, apart from known limitations with newer games, it caused the fewest overall issues with my particular card.
The second, and more important to my mind, point for anybody with a 5900nu, 5900u or 5950u card is that the core and memory parameters in a ASUS bios cant be modified as extensively as all other manufacturers bioses. So regardless of which drivers are used, staying with a ASUS bios limits the potential of the card. For example, using a suitably modified 5950u bios, my Aopen 5900nu 128Mb card running at 530/970 could achieve 8k+ scores with 3dmark03. And this was readily achieved with 66.81, which was another driver I found to work excellent with my 5900 card. But of course it is probably best to remember that ultimate scores in themselves are not usually that important to a cards real world use !