So i'm building a new computer.
It will have QX9650, ASUS P5Q, OCZ DDR1066 4GB sticks and of course the all mighty HD 4870.
My problem is i can't decide if the 1GB version is so much better than the 512MB version.
In my country the price differences are about 85$
I suggest you get a Q9550 instead of QX9650 and use the savings to get two HD 4870 512MB and to upgrade the MB to P5E Deluxe X48 to avoid Crossfire bottlenecks. Get a 750W or better PSU. This way you'll have a much better gaming machine for less money. The Q9550 is already way overkill for games, so the QX9650 won't really add any value for the price difference, even if you overclock it like crazy.
Excellent price for that PC Power & Cooling, only $110. I got one of those for almost $200 last year. There's also the Corsair 750TX, $100. The main difference is that the PC P&C blows the air to the back rather than vertically, which is smart IMO. Either would be excellent.
A P45 motherboard + HD 4870X2 would be faster than an X48 + two HD 4870 512MB cards at 1920x1080. It should be very similar to X48 + two HD 4870 1GB. You are playing at a high resolution and the additional RAM matters.
Oops, what do you mean "in my country"? If you're not in the USA forget all those nice sales at newegg. They won't even ship to me and I live just an hour away from the USA border. Are you in Canada by any chance?
colegade, again, I'm paying for the QX9650 75% discount from it's original price, so no, i don't prefer the Q9450 which actually costs more
Nils, i can afford the price, but i thought i would spent it on other components like 750GB HD instead of 500.
That's why I'm asking if the price difference is negligible to the performance i will get with more RAM.