2 of 4 RAM Slots, not working?

[AdamRobert]

Hello,

first, Specs:

[cpp]RAM: Mushkin Silverline 2x4 GB 10666 DDR3 (I bought 2 of these...)
MOBO: Asus m4a78t-e DDR3 Capable, max 16 GB
CPU: AMD Phenom II X4 945
HD: Hitachi 500 GB HD
O/S: Windows 7 SP1, Fresh Install[/cpp]

Problem: ONLY 8 GB (2x4 GB) installed in the first 2 of 4 slots is working. When I add another 8GB to the remaining 2 slots, PC does not start up.

What do I have to do? Please help!

Are my 2 slots deactivated? Or what do I have to do to BIOS to recognize and use all 16 GB?



I have ruled out Bad memory, as I have tested all sticks individually in the first 2 slots... they work fine.

Just Slots 3 and 4 Don't work. Please help! Is it a bad motherboard, or do I need to Update BIOS or reset CMOS?

 

[buzznut]

You don't say if all the ram sticks are matching.
Do you know if you have the latest BIOS revision?
Have you checked with the motherboard manual to see if you are populating the ram slots correctly? What timings are you using?

 

[HugoStiglitz]

http://www.asus.com/Motherboards/AMD_AM3/M4A78TE/#MSL

does not list any type of Mushkin ram.

running 2 sticks of ram is generally fine. when you start looking at filling all the slots it can be hit and miss. unless you make sure you select compatible ram.

 

[buzznut]

http://www.asus.com/Motherboards/AMD_AM3/M4A78TE/#MSL

does not list any type of Mushkin ram.

running 2 sticks of ram is generally fine. when you start looking at filling all the slots it can be hit and miss. unless you make sure you select compatible ram.

Ah yes, always check your motherboard's approved memory list. Always

 

[pat]

Give them a little more voltage in BIOS.

 

[scout_03]

did you put them in dual channel a1-a2then b1-b2 also set them unganged.they have the same timing my patriot used on the same motherboard check all you bios setting with user manual