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 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? Valtiel January 21, 2007 3:45:12 AM Hmmm, 184 divided by 240 = 0% chance. Can't find your answer ? Ask ! Get the answer 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 Can't find your answer ? Ask ! Publish Related resources Wanted: Old computer stuff ( DDR2 , 775 mobo, PSU) Forum DDR2 800MHz -- OK for DDR2 667 motherboards ? Forum Choosing a DDR2 RAM for an old rig. Forum Graphic cards compatible with Asus DDR2 Motherboard . Forum Old & slow DDR2 (400MHz) on new Asus P5W mobo? Forum Newbie asking questions for Motherboards that use DDR2 PC 6400 RAM Forum nForce4 SLI Intel Edition - 667mhz PC2-5300U DDR2 SDRAM Compatibility Forum Did DDR2 RAM prices just go up?!?!????? Forum DDR2 or DDR 3... Please help Forum AM2 MoBo / DDR2 RAM compatability question Forum Installing DDR2 into a DDR motherboard ? Forum Will DDR2 be compatible with DDR 3 Forum P4M800Pro-M & DDR2 RAM Problem Forum Ddr2 not detected Forum Intel i5 3550p & AS Rock Z77 PRO 3 Forum striker extreme with 7950 gx2 problem Forum Problems with detecting correct cpu Forum One long, three short beeps at POST with P5B Deluxe Wifi Forum can't create a partition on SATA hd with k9 mobo Forum Couple problems with my P965-DS3 Forum More resources Read discussions in other Memory categories Compatibility DDR2 DDR3 Dual Channel RAM Corsair G.SKILL !