Can Dual Channel Ram mix with Single?

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My motherboard (Asus A8N-SLI Deluxe Socket 939) currently has Geil 2x512MB Dual Channel ram, using DIMM_A1 and DIMM_B1, but windows will not boot after I installed a new single 1x 1GB DDR400 Hynix ram stick on either DIMM_A2 or DIMM_B2. Since I already have dual channel installed must I have another 2x 512MB dual channel pair on DIMM_A2 and DIMM_B2 to upgrade to 2GB?


Posts: 1,994   +1
Dual channel actually refers tot he motherboards capability. paired sets of ram are called "dual channel" because the are paired to make sure they are operating at the same speed and timings. Your problem is that either the geil doesnt like the hynix or your motherboard doesnt.


Posts: 7,545   +691
TS Special Forces
Your motherboard's manual makes no mention of the possibility of using three RAM modules, only one, two or four. I'd guess three are not supported.
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