Solved Can i run ddr400 in place of ddr2 Tags: Memory DDR2 Presario RAM Compaq Last response: August 18, 2010 6:09 AM in Memory Share Burshwin August 7, 2010 11:20:47 PM Hi. I have a compaq presario running 256MB of DDR2 Ram. I have a 2GB DDR400 module. Can I use it? Will it improve performance? More about : run ddr400 place ddr2 COLGeek a b } Memory August 7, 2010 11:33:05 PM No, DDR is not compatible with DDR2 and vice versa. Sorry. Burshwin August 7, 2010 11:43:36 PM Thanks GOLGeek Related resources Can i use DDR2 AND DDR400 at the same time? - Forum DDR400 or DDR500 for AMD - Forum G.Skill DDR400 Cas 2.5 or new DDR2 high latency? - Forum 4x 512 ddr400 ram vs 2x1gb ddr2 667/800 ram? - Forum what's the truth behind the ddr400 memory compatibility? - Forum Can't find your answer ? Ask ! Get the answer COLGeek a b } Memory August 7, 2010 11:50:08 PM You are most welcome. Best solution jitpublisher a b } Memory August 8, 2010 1:02:14 AM Well, not only is it incompatible, you cannot physically plug one into the others slot, they won't fit. Burshwin August 18, 2010 6:09:10 AM Best answer selected by Burshwin. Can't find your answer ? Ask ! Publish Related resources: ForumIf I get ddr400 can I still run the Mobo at 333? ForumCan I put DDR-400 into a DDR2 mobo? ForumCan I install DDR2 PC2 -6400 in place of DDR2 PC2 5400? ForumP4M800Pro-M & DDR2 RAM Problem ForumBuild an AMD 939 now? or wait for AM2 & DDR2 ? ForumAM2: FIRST LOOK AT DDR2 PERFORMANCE ON AM2 ForumAM2 Tested with 800 Mhz DDR2 ForumDDR now or DDR2 Later ForumDDR2 Same as DDR ForumPossible to run DDR333 memory in a DDR400 Mobo? ForumDDR2 ? ForumGood read on DDR-2 ForumChoosing the Right DDR2 Memory Speed Forum"Reboot and select Proper boot device" Forum[Solved] What top DDR2 PC-8500 1066 that can be tightened to 4-4-4-12? More resources Read discussions in other Memory categories Compatibility DDR2 DDR3 Dual Channel RAM Corsair G.SKILL !