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Gigabyte EX58A-UD3R only seeing 4 modules out of 6 RAM

post #1 of 6
Thread Starter 
Gigabyte EX58A-UD3R only seeing 4 modules out of 6 RAM

2 kits of (6gb g.skill DDR3 1600 red ones)
using latest bios revision F6, when booting it keeps saying recovering lost ram size

In bios it shows that channels 5 and 6 are empty totaling 8gb of ram, but when it boots into windows it shows 12gb and 8gb useable (cpu-z shows 12gb) windows shows 8gb

not sure whats going on anyone got any ideas?
Edited by riflepwnage - 5/1/11 at 1:21am
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I7 Beast
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post #2 of 6
Hi there,

Can I ask are the kits 3 x 2gb DDR3 Modules? So 6 x 2gb = 12gb?

Just check they are all correctly seated - also just make sure the RAM is working....
    
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post #3 of 6
Also what CPU are you using? Is it the Core i7? I have had some Intel Boards only accept a certain type and amount of RAM and completely discount (or not recognise) all of the RAM present.....
    
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post #4 of 6
Thread Starter 
yea its an i7 920 with g skill
I7 Beast
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post #5 of 6
Hmmm looking closely more at this and some evidence out there I would suggest it is a bad memory slot and probably the Mobo is faulty. If all Memory Dimms are in and correctly seated just check the one's that do not work in another slot and see if you get the same result, but ultimately I think it is probably the Motherboard.

When everything that is complicated is ruled out go back to the simple and you may find the solution....
    
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2 x 64gb SIII SSD, 1 x 1tb Samsung Spinpoint F3 LG BluRay Drive Windows 7 Ultimate 64bit 1 x 40" Evesham HD, 1 x 18.5" BenQ LED 
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post #6 of 6
I had this motherboard and had all 6 slots filled with 4GB of ram (24GB total), and all of it showed up, passed stability tests, and was useable for about a month before a stick disappeared and Windows reported only 20 of 24GB was usable. I tried re-seating the ram sticks and it would then report only 16 of 24GB was usable. No matter what I tried it would only recognize 16GB of the 24. Testing the ram one stick and one slot at a time showed I had two dead slots and that all my ram was still usable. Luckily I still had one slot from each of the channels still working so I am still able to fall back to 3 x 4GB for 12GB in triple channel, and have since moved on to SandyBridge (and thus go with 4 x 4GB for 16GB)

I'm going to bet you have dead slots just like I had, if you were lucky like I was you might be able to get by with only 3 slots and still use triple channel, although it looks like you have only 2GB sticks so you might be a bit more limited than I was. 12GB is overkill for gaming but my work can easily hit over 8GB so 12GB was a bare minimum that I needed (although 16+ is more ideal for me to never run into limitations).

So in my case I not only was able to maintain an acceptable configuration, I also didn't need to RMA the motherboard until I had a complete replacement system ready to go. Not sure where you stand but if you want to use all the slots you very well may need to RMA the motherboard
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HK47
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