😉 There's no competition at all. The 128MB version is a much better investment, particularly in the long term. There's a LOT of crap talked about the 64MB version being faster and o/c better, but that is total crap! Forget fancy HSF and RAM HS designs, they really do nothing. What you need to look for when looking for a good o/c'ers card is the RAM used. Most 4200s (64MB and 128MB) use 4.0ns RAM which will allow about a 300/550 o/c with stock cooling and nothing wierd. 3.6ns and faster RAM will allow around 300/600, and that can be found on 128MB just as easily as 64MB versions. Regarding manu, there really isn't any point paying extra for a 'top brand', go by price, sw and features (VIVO etc). You can tell what ns RAM a card uses by readin the RAM chips, it is usually found on the 2nd line, the last 2 numbers.