I tested my card on my friend's system(C2D E7400, no overclocking done!) and moreover the monitor was a samsung 22" and i ran the same game in full rendering! the result, a SOLID 70fps.!
the software that i was using to check my temperatures(in my computer) was 'CPU Cool' and i think that was the problem. i used another software, 'real temp 3.00'. the first one showed +/- 50 and the second one showed a whooping 80+

(i guess tat is too much for an E8400 OC'ed to 3.6Ghz, correct me if wrong)
i removed my stock heatsink and there were only traces of thermal paste(i had not applied any while i installed it initially, some was pre applied to it).
i jus now purchased a cooler master hyper212(120mm) with dual fans(stock comes with only one) for 2.5k +0.5k(extra cooler master 120mm fan). eventually i got a decent 95fps on the stock proccy.
i donot know, this was the only game i had installed, didnt try another and it was a download from torrentz which was around 6.5GB.
still running on the 32bit version and on 2gb ram... yet to try it out on the 64-bit edition with the extra ram..