Edward Yee wrote:Starglider, I haven't heard anything about the bumpgate thing, please tell me more, and what that had to do with "underfill".
The underfill is essentially the glue that sticks the silicon die to the chip package. It is under a surprising amount of mechanical stress, and using the wrong compound will cause the connections between the die and the package to fail, rendering the chip useless. Nvidia made this mistake with numerous batches of their notebook GPUs a couple of years back,
as described here, resulting in lots of premature failures and some lawsuits. They moved to another material for a while, but then
went back to the same material for the GTX 480, essentially because the thing was designed with no regard for the limitations of the target manufacturing process and is
barely able to be produced at all. The 480 missed clock targets by over 25% and all chips have 6% of their shaders permanently disabled; and that was after a six months delay required to make it work at all. Reported failure rates on the 470/480 are already high, although they haven't been out long enough to be confirm the problem is as bad as before. No one seems to know whether the 450 or 460 have the same (probable) underfill issue, Nvidia has refused to comment.
No idea what PhysX
PhysX is a GPU-based physics engine that adds additional cosmetic detail to games. A very few games that Nvidia bribed the developers into using PhysX for. Everyone else uses CPU physics, and the future is DirectCompute physics (which work on any DX11 compliant hardware).
or CUDA are, to be honest.
CUDA is Nvidia's proprietary solution for using GPUs for non-game compute tasks, e.g. video encoding and scientific computation. It was an early pioneer, but is now obsolete and has been effectively replaced by OpenCL, which is supported by AMD, Nvidia, Apple and Intel on GPUs and CPUs.
but so far I'm thinking of waiting for a price drop as Starglider recommended on the 5-series... although, if $80 gets me a 56xx and $90 a 5750, would you say it's already happening?
The Radeon 6770 & 6750 are supposed to be launched in four to five weeks time. If you can wait that long I strongly suspect there will be further price drops in the $100-200 area.