Upgrading my memory - Mixing CAS

[LoneEagle]

Hi,

I have an ASUS P5W-DH with 2 * 1GB Corsair XMS2 5-5-5-12 (6400) and I saw a deal for 2 * 1GB on TigerDirect.ca for the same memory but with a Cast of 4-4-4-12.

I'm planning to install Vista 64bits (ordered the DVD). 2GB is actually not good enough. My game, BF2142 use like 1.5GB I think? Lots of file swaping with the virtual memory.

I'm currently overclocking and will these 4 be compatible together? Will the faster one slow down to match my current ram?

Thanks

 

[jitpublisher]

The board may not be able to auto-detect the correct speed with both kinds installed.
Give it a try, if it does not boot, remove the new memory, go into to bios and set the timings manually to the slower setting, then reinstall and boot.
Yes, all the memory will run at whatever the slowest memory speed is.