Can I use DDR2-800 (or higher) memory with a 533FSB CPU? Tags: Memory DDR2 CPUs Last response: January 8, 2007 12:07 PM in Memory Share whoaru99 January 8, 2007 2:42:55 AM Looking at putting together a system based on a OC'ed Pentium 805D until the prices of the better chips comes down a bit. However, I'm going to put the 805 chip on a decent mobo like the Gigabyte 965P-S3 so the board will keep me going through a CPU upgrade or two down the road. So, since the mobo will support DDR2-800, will it work to get this type of memory for future upgrade considerations even though I'm going to start with 805D CPU at 533fsb? Don't be too hard on my "entry level" CPU choice - I'm still on a PIII 1GHz right now... TIA. More about : ddr2 800 higher memory 533fsb cpu chocobocorey January 8, 2007 3:30:36 AM yeah itll work. the bios should set up a memory divider, i guess a 2:3 ratio or something to that effect (800*.666=533). either that or you can just underclock your RAM down to 533 speed. i think the e4300 or whatever the cheapest core 2 is called is coming out in a few weeks, which would only be about 40 or 50 more than the pentium D, if you have some time to wait. CompuTronix a b à CPUs January 8, 2007 4:15:05 AM I agree with chocobocorey. You're correct that DDR2 800Mhz RAM will provide you with upgradability, but you'll be much happier with any C2D that you can afford. 8) Can't find your answer ? Ask ! Get the answer whoaru99 January 8, 2007 12:07:47 PM I can wait, but not sure the nice chunk of restocking fees that a well-known merchant agreed to waive (contingent on a new order) will wait that long. Can't find your answer ? Ask ! Publish Related resources Any negative effect using higher MHz memory than CPU supported? Forum Can I use ddr2-800 pc2-6400 memory on Asus P2AD2-e Premium? Forum Newegg suggests higher DDR3 memory than CPU supports. Why? Forum how do i update bios on a asus b85m-g motherboard to use a higher spec cpu (intel core i5 4670k s1150 cpu ) when unable to acc Forum Can a cpu use a higher speed ram then it says on its website? Forum Can I use a CPU that's a higher wattage than my motherboard supports? Forum Higher memory speed or higher CPU speed? Forum More memory or clocked higher CPU? Forum Solvedmemory with Pentium 4 2.0 Ghz CPU using Windows XP Forum How much memory can an i5 3230m (and i3 2328m) cpu use? Inconsistent info is on the net Forum SolvedSvchost.exe using high memory usuage/cpu Forum Is there any cpu line that uses higher quality metals? Forum Will i expect a higher performance using a lower type CPU? Forum Why do they not build ram out of the same kind of memory as is used in the CPU cache? Forum Massive cpu/memory use in Media Center 11 Forum Server slowdown but %CPU and memory use OK Forum Pc is only using memory and not cpu Forum Memory Nooob, aarrggghh! Using CPU-Z to set timings !!! Forum More resources Read discussions in other Memory categories Compatibility DDR2 DDR3 Dual Channel RAM Corsair G.SKILL !