RAM and GPU questions

for ram (8gb setup) i am wondering which is better (more compatible, stable, faster, etc.) for an asus rampage MOBO?

http://www.newegg.com/Product/Prod [...] 6820231166

or

http://www.newegg.com/Product/Prod [...] 6820146789


do 2 sets of this ^ (4 sticks -> 8gb) fit on an asus rampage?


For GPU im wondering what sort of performance increase i could expect if i get 2 of :


http://www.newegg.com/Product/Prod [...] 6814121269

instead of just one. also if i get 2 of these will a 1300w PSU be enough with 5 extra fans, quad core, crossfire, 10,000 rpm hd, and blue ray player?
PSU:
http://www.newegg.com/Product/Prod [...] 6817814011

mushkin XP ASCENT would be better, from what I've read. Yup, either one will fit on the mobo. I think you meant to ask if they would work with the mobo out of the box. Probably not. If not, try each stick in each slot.

This is a list of certified psus for HD 4870 X2 CF. The one you picked out will work:

http://game.amd.com/us-en/crossfir [...] 04870%20X2

If you have problems:

Increase voltage to 2.1v. Relax timings.
Set the RAM voltage to max and bump up the NB voltage untill its stable.

It's hard on the Northbridge with 8 Gig. Plus you need to set the tRFC over 54.