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Bad motherboard? 2 RAM slots bad

Last response: in Motherboards
June 19, 2012 8:57:01 AM

hi there, well one day my rig was working fine and dandy then I went on vacation and when I came back it wouldnt boot. It turned on (fans turned on and HDD started up) but the monitor wasnt getting a signal and my mouse/keyboard wasnt lighting up. So first thing i checked was the RAM. I took all but one stick out and it booted up fine. So I then tested the other sticks of memory in the first slot and they all worked too. Which proves that my RAM is good right? Well my motherboard has dual channel so the ram slots look like 1- A and B (blue) and 2- A and B (black). Where the A and B are paired. So at this point I have tested all 4 of my RAM sticks in slot 1-A. Long story short I repeated putting 1 stick of RAM in all four slots and trying to boot. It turns out that 1-A and 2-A arent working. And Ive tried just about every combination of putting 4 sticks in, 2 sticks, switching them up ect. So, right now Im running 2/4 of my RAM sticks in slots 1-B and 2-B which doesnt even let them dual channel. I guess my question is: Does this absolutly mean that my motherboard is bad? Is there anything else I should test? What made these 2 ram slots go bad? How effective is it running right now (ie what does the dual channel actually do)?

Thanks in advance.
a b Ĉ ASUS
a c 328 V Motherboard
June 19, 2012 9:09:20 AM

OK, post your specs...

RAM: with link please.
OS type + version
June 19, 2012 9:43:40 AM

CPU- AMD Phenom II X4 965 Black Edition Deneb 3.4GHz Socket AM3 125W Quad-Core Processor

RAM- G.SKILL Ripjaws Series 8GB (4 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600

PSU- CORSAIR CMPSU-750TX 750W ATX12V v2.2 SLI Certified CrossFire Ready 80

hdd- Seagate Barracuda 7200.10 ST3250410AS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive

GPU- EVGA 01G-P3-1281-AR GeForce GTX 285 1GB 512-bit GDDR3 PCI Express 2.0 x16 HDCP

Mobo- ASUS M4A79XTD EVO AM3 AMD 790X ATX AMD Motherboard (although the picture on new egg doesnt match? ill have to double check when i get home)

Vista Ultimate 64 bit
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a b Ĉ ASUS
a c 328 V Motherboard
June 19, 2012 9:55:37 AM

BTW, do u get any beep from the PC on start?
June 19, 2012 9:57:23 AM

How do I run it? DL it to a cd and boot with cd in? Sorry, not very good with software.
a b Ĉ ASUS
a c 328 V Motherboard
June 19, 2012 10:00:16 AM

Do u have a usb stick?
June 19, 2012 10:16:44 AM

ok so i have it on my usb drive. Should I put all my RAM back in and try to boot? how do i run the program
a b Ĉ ASUS
a c 328 V Motherboard
June 19, 2012 10:34:05 AM

Put there as many as u can, but the system have to boot OK and after the test is done,

switch the RAM sticks.
June 19, 2012 10:36:43 AM

Ok I'll do that and check back in tonight. Thanks a lot man.
a b Ĉ ASUS
a c 328 V Motherboard
June 19, 2012 10:45:28 AM

Good luck!