what the? (memory problem)
okay, i know all my ram works perfectly since i ran the memtest, but whenever i put a stick in the forth slot, all i hear are long beeps and once in awhile it would just start normally. when i put any of those stick in slot 1-3, it seems to work fine, but its the 4th slot, but then again, sometimes when i restart my computer, there wont even be a post beep. i ran the memtest again and they all passed again, anybody know whats wrong? my rig is on the bottom, and i have 2 1gb and 2 512 mb, cant run dual channel since the timing is wrong, but am able to run single once in awhile, as long as i close my computer for like 5 min and turn it back on, but then i cant OC. when i run cpu-z and have all my sticks in the 4 slots (tried in every order, all i get is sometime 2 gb and sometimes 3 gb, but on cpu-z when its on 2gb the second and third are only 512, but i know one of them is 1 gb, and when its 3gb it says the 4th slot is missing one. is it the mobo or the cpu?
thanks in advance.
Desktop -Cooler Master NV690/AMD Phenom II X4 965 BE/MSI 880G-E45 Motherboard/2 x 2GB DDR3 G.Skill Ripjaws X/Sapphire HD 5870 1GB GDDR5/CORSAIR CMPSU-550VX/Seagate 7200.12 500GB (OS), Samsung F3 1TB (Storage)/Sony DVD Burner/Windows 7 Professional 64-bit