Which RAM??

[Boom782]

Im building a new system:

DFI nF4 Ultra-D
Opteron 146
x1800xt

and I cant decide on which RAM now. My opteron runs at 2.7ghz on air so Id like RAM that can run 1:1 hopefully up until at least 250. So should I get 2gb PC4000 or 2gb PC3200 with titer timings?

The part that confuses me is why is PC4000 RAM so cheap? For example...

CORSAIR XMS 2GB (2 x 1GB) 184-Pin DDR SDRAM Unbuffered DDR 500 (PC 4000) Dual Channel Kit System Memory - Retail $170 shipped at Newegg

CORSAIR XMS PRO 2GB (2 x 1GB) 184-Pin DDR SDRAM Unbuffered DDR 400 (PC 3200) Dual Channel Kit System Memory - Retail $250 shipped at Newegg

The PC4000 runs at 3-4-4-8 and the PC3200 runs at 3-3-3-8.

Also any reccomendation for memory that runs well on the Ultra-D? Im looking to spend in the area of $160.

 

[PhoenixOrion]

If you plan to OC, then I'd suggest going for the PC4000 so that the ram would not be the question mark.....the lower price helps out too.

 

[Boom782]

But why is it lower priced? Is there something im missing? Also would the PC4000 with timings of 3-3-3-8 be capable of titer timings if run under stock speed? Im not really sure how timings work and truthfully which ones are important.

 

[furballi]

The speed advantage of 1:1 is about 50MHz core speed. I'd go with ValueRAM at 166 divider. There are reported issue with Corsair VS and this MB.