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 Good OCing DDR2-800 vs DDR2-1066 and higher Forum Help: 8xAGP Mobo reqd for 533FSB S478 3gHz P4 Forum Intel p4 2.4 533fsb oc question Forum Help on selecting DDR2-533 or DDR2-800 memory ? Forum 533FSB CPU on a P4B? Forum Can the Intel D975XBX support 533FSB (805D)??? Forum With 333 FBS 1:1 DDR2-667 or DDR2-800 using divider Forum Guys, help on ASUS P4PE 533FSB Forum Want to overclock my Q9450 to 3.2. Should I change my memory ? Forum p4 3.06 533fsb Mobo Recommendation Forum 533fsb & ddr mobo's ??? Forum Is DDR2-800 still good? Forum 4gb ddr2-800 dual-channel vs 6gb ddr2-1066 single-channel Forum E8500 & DDR2-800 ??? Forum Anyone have 4gb DDR2-800 (1x4GB) In Stock? Buyer Ready Here!! Forum 2GB DDR2-1066 or 4GB DDR2-800 for a P35 Q6600 setup? Forum E6600 vs E6420 for overclocking with DDR2-800 RAM? Forum e4300 + 965p-ds3 with DDR2-800 won't overclock!! Forum Intel i5 3550p & AS Rock Z77 PRO 3 Forum help with memory choice Forum More resources Read discussions in other Memory categories Compatibility DDR2 DDR3 Dual Channel RAM Corsair G.SKILL !