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New System, MB will boot with 1 stick of ram but not 2

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February 18, 2011 6:11:49 PM

Just finished a new build and I can't get the computer to run with both sticks of ram. It works fine with just 1 stick, and I have tested it with both.

Motherboard is BIOSTAR A770E3 AM3 AMD 770 ATX AMD Motherboard
Ram is Mushkin Enhanced Essentials 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Dual Channel Kit Desktop Memory Model 996586

It will boot with 1 stick and I have tested both sticks individually and they both work.
Tested all the approved dual channel modes.
Tested with RAM @ 1.65v and @ 1.6v

More about : system boot stick ram

a c 117 V Motherboard
February 18, 2011 6:56:58 PM

So you've installed the ram in slots A1 and B1.
And you've run a good program like Memtest86+ at mobo default values.
Is that correct?
Ram is vendor spec 1.5v btw.
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February 18, 2011 7:04:27 PM

davcon said:
So you've installed the ram in slots A1 and B1.
And you've run a good program like Memtest86+ at mobo default values.
Is that correct?
Ram is vendor spec 1.5v btw.


Yes, I can only get it to run with 1 ram stick in a1. Adding a stick to b1 and it will not load. I have also tried running a2 and b2 with no luck.

I troubleshot the problem in the homebuilt forum previously and they have me try at 1.6 and 1.65v to see if that would get the ram to work.

I have not run any programs, I do not even have an OS on the system yet. Wanted to sort out this before going further.
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a b V Motherboard
February 18, 2011 7:20:04 PM

meekers said:
Yes, I can only get it to run with 1 ram stick in a1. Adding a stick to b1 and it will not load. I have also tried running a2 and b2 with no luck.

I troubleshot the problem in the homebuilt forum previously and they have me try at 1.6 and 1.65v to see if that would get the ram to work.

I have not run any programs, I do not even have an OS on the system yet. Wanted to sort out this before going further.

Have you tried running 1 stick in B1 only? or B2 only? just trying to eliminate a bad DIMM slot... :bounce: 

Look here:
http://www.tomshardware.com/forum/261145-31-perform-ste...

especially @ step 6.
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February 18, 2011 7:35:52 PM

Just tried all 4 slots. It will boot from A1 and A2...it will not boot from B1 or B2.
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a b V Motherboard
February 18, 2011 7:40:34 PM

Possible it's a bad Motherboard.
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February 19, 2011 6:29:43 PM

I finally got it to work by putting the ram into A1 and A2 out of frustration. Booted up fine and windows detects both sticks.

Unless I am blind this is contrary to the motherboard manual.
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a c 117 V Motherboard
February 20, 2011 8:14:08 PM

meekers said:
I finally got it to work by putting the ram into A1 and A2 out of frustration. Booted up fine and windows detects both sticks.

Unless I am blind this is contrary to the motherboard manual.

Lol! on my latest 1156 build i bought a MSI 1156 mobo and against my better judgement switched the already properly placed ram to what the manual specified.
Stupid manual!
Good to hear you solved your problem:) 
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