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P7P55D LE & Dual Channel RAM problems

Forum Motherboards & Memory : General Motherboard - P7P55D LE & Dual Channel RAM problems

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Hanpan   10-07-2009 at 10:45:31 AM

Hi there,

I am setting up my new i5 rig with the Asus P7P55D and this RAM:

Corsair 4gb DDR3

For some very strange reason, if I install the RAM into dual channel mode, the BIOS will only recognize it as 2GB (Slots a1+b1 or a2+b2) but I install the RAM into single channel (a1+a2, b1+b2) it will notice all 4gb, but CPU-Z reports it as being in single channel, which it of course is.

Could anyone please help explain why I can't run my RAM in dual channel mode? Do I have a buggered motherboard? :(

Hope someone can help!

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r_manic   10-08-2009 at 10:37:54 AM
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You can also try other memory sticks with your new rig. Who knows, the memory you bought may actually be faulty.

------------------------------ Desktop | E7300 | P5KPL-AM | 2GB DDR2 667MHz | NVIDIA 9500 GT | ST3320613AS | w2228h
XPS M1330 | T8300 | Dell 0U8042 | 2GB DDR2 800MHz | NVIDIA 8400M GS | WD2500BEVS-75US | 1280 x 800
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Silver Motherboards badge mongox   10-08-2009 at 10:48:08 AM
- 0 +

Or it could be a non-matched pair - look carefully at the labels, but that seems unlikely.

Need to put one stick in and run memtest86 on it, then the other.

------------------------------ Gigabyte MA785GM-US2H, AMD Phenom II x2 550 BE (4 cores@3.6GHz), G.Skill 2x2GB DDR2 1066 (820@CL4), Scythe Katana3, Hec 585W, Samsung 2232BW+, WD Caviar Black 1TB SATA, Sea 500GB USB, 12 IDE HDs w/Masscool IDE-SATA Convertors, Ugly Old Case, Win XP 32bit
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