Are old DDR sticks compatible with new DDR2 motherboards? Tags: Memory DDR2 DDR Compatibility Motherboards Last response: January 21, 2007 4:50 AM in Memory Share airPA75 January 20, 2007 10:47:48 PM I have been shopping around trying to build a new system. To save a few bucks at the beginning I was hopping to use my old DDR 400 sticks until I can upgrade later. Can I do this? More about : ddr sticks compatible ddr2 motherboards | E-mail me updates | Report abuse Register or log in to remove John_C January 21, 2007 1:34:05 AM Sorry. DDR Ram has 184 pins. DDR2 RAM has 240 pins. Want to guess the likelihood of successfully getting your 184 memory to work in a 240 pin slot? | Report abuse Valtiel January 21, 2007 3:45:12 AM Hmmm, 184 divided by 240 = 0% chance. | Report abuse Giraffe January 21, 2007 4:50:05 AM Quote:Hmmm, 184 divided by 240 = 0% chance. well you learn something everyday I thought 184 divided by 240 = 0.766666667 the only way you can use DDR ram in a new system is if you use the ASROCK 775Dual VSTA Motherboard it supports DDR, DDR2, AGP and PCIE the board has its downsides though | Report abuse Register or log in to remove Ask the community Publish Tom's Hardware>Forum>Memory>Are old DDR sticks compatible with new DDR2 motherboards?> Related ressources: ForumWanted: Old computer stuff ( DDR2 , 775 mobo, PSU) ForumDDR2 800MHz -- OK for DDR2 667 motherboards ? ForumChoosing a DDR2 RAM for an old rig. ForumGraphic cards compatible with Asus DDR2 Motherboard . ForumOld & slow DDR2 (400MHz) on new Asus P5W mobo? ForumNewbie asking questions for Motherboards that use DDR2 PC 6400 RAM ForumnForce4 SLI Intel Edition - 667mhz PC2-5300U DDR2 SDRAM Compatibility ForumDid DDR2 RAM prices just go up?!?!????? ForumDDR2 or DDR 3... Please help ForumAM2 MoBo / DDR2 RAM compatability question ForumInstalling DDR2 into a DDR motherboard ? ForumWill DDR2 be compatible with DDR 3 ForumP4M800Pro-M & DDR2 RAM Problem ForumDdr2 not detected ForumIntel i5 3550p & AS Rock Z77 PRO 3 Forumstriker extreme with 7950 gx2 problem ForumProblems with detecting correct cpu ForumOne long, three short beeps at POST with P5B Deluxe Wifi Forumcan't create a partition on SATA hd with k9 mobo ForumCouple problems with my P965-DS3 More resources Read discussions in other Memory categories Compatibility DDR2 DDR3 Dual Channel RAM Corsair G.SKILL !