I think I have enough now to rate Geforce GT 545.. the hardest challenge ever! Xbitlabs has been doing some more benchmarks on it in game performance reviews. Wish me good luck - I'll be back with a rating!
54vp for the gt545 is a good guess
Thanks.. yeah, there are 2 versions - the DDR3 and the GDDR5 version. They have different bus widths (128-bit and 192-bit) and also different number of ROPs according to Wikipedia ( http://en.wikipedia.org/wiki/GeForce_500_Series
) . I do not even know where the Wikipedia editor got that info from.. but it's probably a very good guess given that the ROPs have always been tied with the bus. I went ahead and rated them at 48 and 56 VP respectively. Yay, now it's outta the way.. it was just very very difficult to try to approximate the overall gaming conditions, taking the shader muscle, texturing power, memory bandwidth, and ROP back-end output all into perspective, while making sure it's in-line with other similarly-performing cards like 8800GTX and not coming too close to GTS 450 or being slower than 8800GT that has far lesser specs. The DDR3 memory seems to be severely bottlenecking the GT 545.. only the 24 ROPs seem to allow it to do fairly well with 4x AA as Xbitlabs has shown, but with AA turned off, the 6670 with only 8 ROPs would come out ahead.