I know after reading the topic many of u ppl must hav thought that i am talking about AMD64 line of processors. U got it totally wrong and this is a fault u shud apologize 4. Jst Joking . anyways here I am talking about GFX cards with 64Bit memory controller which makes the card cripple in terms of performance. such cards are hot-sellers in India and the vendors and even the companies don't write about the version they are providing on the retail BOX. Sometimes without using utilities like RivaTuner u won't b able to find whether it's a 64bit or 128bit memory controller card. this may sound like cheating to ppl.(aand in fact it is!! ).For example Geforce FX 5200, 5300 (for PCI-E)& 5700LE and ATi Radeon 9500,9550,9600 and X300(for PCI-E)comes in both 128-bit and 64-bit memory controllers. Ppl end up buying the latter one and then blame the companies like nVidia and ATi 4 the performance they get. This shud b quite clear that these cards won't b good at all on memory overclocking. so don't expect a rise like 20 or 30% in performance by overclocking core only. the 128bit memory controller cards r much better in terms of performance and overcloking as the memory bandwith jst gets doubled. so even buying a low end cardss like FX5200,5300,5700LE or radeon 9500,9600, 9550 KEEP IN MIND TO GO FOR A GFX CARD HAVING 128-BIT MEMORY CONTROLLER. Now, tell me whether 64bit suxs or not ????