I have an Asrock 939Dual-SATA2 MB with 2 one-gig sticks of ddr400 installed in first two slots. BIOS correctly identifies both and total memory is listed as 2 gig dual channel. However, Windows only reports 1 gig of ram. 1 gig is listed in System properties, dxdiag and FreshDiagnose, only HWiNFO32 correctly reports 2 gig. I've tried inserting each seperately and they both boot correctly, I've tried switch slots and using both in Mobo slots 3 & 4 with the same results. Any ideas? Thanks fish4specs edit oops: Windows XP Professional, Asrock 939Dual-SATA2, AMD Athlon 64 3700+, 2 Gig Kingston DDR400, Nvidia Geforce FX5200 AGP.