Question ASUS P8Z68-V GEN3 only detects 8gb of ram

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LightGenjo

LightGenjo

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May 7, 2020
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So I have different sticks of ram with the same spec, totalling 4x4gb of ram. I have tried everything from reseating the cpu to trying every stick on every lane, but with ANY configuration, the board refuses to recognise more than 8gb of ram. All 16gb have worked before on the same system, and this is a new issue. CPU is i5-3570k, and the sticks are HyperX blu 1600mhz CL9 2x4 and HyperX genesis 1600mhz CL9 2x4.

I do wonder if this is related to the fact that sometimes the system refuses to post, the VGA_LIGHT being lit up.
 
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So, this happened randomly while it worked before just fine? (or you realized it just now)
Were any changes made to the system prior to this happening?

The fact that the same sticks worked before and now shows as less, is the problem. I would have initially told you that the RAM are not the same, thus causing issues. But, since you mentioned it worked before, that doesn't add up. (it still could be though)

Did you check this before, or did you check it recently and discovered this? it could be that this was from the start and you just noticed it now? xD
 
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zinkles said:
So, this happened randomly while it worked before just fine? (or you realized it just now)
Were any changes made to the system prior to this happening?

The fact that the same sticks worked before and now shows as less, is the problem. I would have initially told you that the RAM are not the same, thus causing issues. But, since you mentioned it worked before, that doesn't add up. (it still could be though)

Did you check this before, or did you check it recently and discovered this? it could be that this was from the start and you just noticed it now? xD
Click to expand...
It did show total memory as 16g before, the board was not in use for around a week. Booted it today to stress test it(going to sell the system), then realised that only 8g was showing 😀 I still do wonder if it's related to the VGA light issue somehow, since it did show 16g before that
 
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alright, stay w/ me, but what happens if you remove another stick (not the one you just put in). does it show up as 8GB or 4GB?
If it shows up as 4GB then the stick you installed as said in my previous post is faulty/not supported.
 
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zinkles said:
alright, stay w/ me, but what happens if you remove another stick (not the one you just put in). does it show up as 8GB or 4GB?
If it shows up as 4GB then the stick you installed as said in my previous post is faulty/not supported.
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still shows as 8GB 😀 i think the motherboard just decided that they won't work together as 16? weird that they do work together as 8 though
 
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I think so too. The RAM isn't faulty, as proven by the tests, so the only thing that can be is the RAM refuses to work together or the motherboard doesn't let it..

The fact that it worked before is the thing that didn't lead me to this conclusion in the start, but now I think its clear that its a problem with mismatched RAM modules.
 
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zinkles said:
I think so too. The RAM isn't faulty, as proven by the tests, so the only thing that can be is the RAM refuses to work together or the motherboard doesn't let it..

The fact that it worked before is the thing that didn't lead me to this conclusion in the start, but now I think its clear that its a problem with mismatched RAM modules.
Click to expand...
After testing, found out that if I install two stick to the same channel, only one is detected. I wonder if there is some kind of setting in the bios that limits the channel bandwith to only one stick?
 
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