DDR Processor

[mclaughlin21]

I've just bought an Elite K7S5A mobo to start upgrading my P2/333 system. I have 256MB of PC133 memory and the mobo supports 2xDRAM & 2xDDR DIMMS. I can buy either an Athlon 1.2GHz or a 1.2GHz 'running on DDR' - extra £10. If I bought the DDR based CPU would it run my existing PC133 memory, or will it only work with DDR based memory?
Thanks
Brian

[Paradigm]

That should work with your existing PC133 memory, but I would really suggest using DDR because not only does it support it, but it would greatly improve your system performance. If I had a DDR mobo with a DDR processor, I would buy DDR memory and a DDR video card because it would be a really fast gaming rig. But of course, that's just me.

[djkain]

I would have to agree with Paradigm, if i had the a DDR system i would use DDR, but if i didn't have the money to get the DDR mem at the time i would just use my old mem until i got the DDR mem, but i wouldn't mix the to mems up.
Later
DJ-Kain

[mclaughlin21]

Thanks to Paradigm & DJ-Kain.
As I'm going to spend £170 on the mobo & cpu, I may as well stretch the budget by £33 ($41) for 256Mb DDR2100. I can always give my brother the old mobo/cpu/RAM to upgrade his old 486!! I'm going to Orlando on vacation in September, maybe I will wait and see if US prices are better than the UK?
Thanks again Brian