ASRock Z87 Extreme 6 - RAM Upgrade - Code 55

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egtrev

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Sep 26, 2012
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Hello,

I have a ASRock Z87 Extreme 6 (latest BIOS 2.4), 4790 and 16GB (4 x 4GB) Corsair RAM.
Everything was working fine.
I decided to upgrade the memory from 16GB to 32GB. I picked up 4 x 8GB RAM.

After installing them the computer won't boot and gets stuck at code 55 (no memory)
If I take any combination of 2 sticks out it boots fine again, as soon as all 4 sticks go in it gets stuck.
If I put my old memory in it works fine.

It seems as if it just doesn't like going past 16GB - am I doing something wrong - is there any setting I might need to tweak?

Thanks for any help/tips.


 
Solution
herrwizo
So, bottom line is: this is not a quad-module kit, but two dual-channel kits purchased separately. In such cases, there are no guarantees - this is what "kits" are used for - they are checked for compatibility. In your case, only 2 by 2 modules were checked, not all 4 together, and apparently they are not identical in every way.

Not much you can do, I am afraid. I'd sell all of RAM and get a single set of 4x8GB certified dual-channel kit.
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herrwizo

herrwizo

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Feb 17, 2009
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Your board does support 32GB - but it is of utmost importance that you use a matching set of 4 modules for dual channel operation. All of the sticks should be purchased as a single package of tested dual-channel memory.

If you cannot get them all to run, it could also be that one of the sticks is dead. Test each stick individually with memtest.

If they all work OK individually, try testing in pairs: sticks 1 and 2, then 1 and 3, then 1 and 4, then 2 and 3 then 2 and 4. If all combinations work, but using all 4 sticks does not, try increasing RAM voltage very slightly.
 
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egtrev

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Thanks for the response.
Each stick works fine individually in any slot.
It seems that is an issue with matching as you say.
As a 16GB dual channel test sticks 1&2 work fine together. stick 3&4 also work fine together. Other combinations do not work.
Is there anything I can do/tweak to get them working as a 4?

 
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herrwizo

herrwizo

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Are they all identical sticks? Purchased together, in a single package?

Try increasing the RAM voltage slightly in BIOS. Other option is to lower the RAM frequency and/or release timings see if that helps.

Other than that, if you still cannot get them to work, the best would be to RMA the entire set, one of the sticks is likely different than the others.

This can happen if RAM was purchased as 2 separate dual-channel kits or 4 individual modules.
 
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junkeymonkey

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if using speeds over 1600 and not using a ''K'' chip the memory controller may be having issue ? I got the same board and 4x8gb of 1600 with a non k 4670

with haswell any memory over 1600 is considered overclocked and you may also need to tweak the cpu along with that for stability there for best to have a unlocked ''K'' CPU like a 4790k why in the memory specs theres [OC] behind speeds over 1600 intel max on that chip native is 1600

[Memory Types]
http://ark.intel.com/products/80806/Intel-Core-i7-4790-Processor-8M-Cache-up-to-4_00-GHz

90% of the time is just a matter of setting the xmp

one more thing make sure you get the sticks pushe in to the slots even and firm and seated properly

I also seem where the cpu cooler mounted wrong like tightened down croocked or too tight can cause this may try to loosen it up / readjust or something and retry . you notice here they also claim ''Please re-install the memory and CPU''

http://www.asrock.com/support/faq.asp?id=334

never know may need to remove the cpu and check for any bent pins if nothing else seems to work ???
 
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egtrev

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They are 2 separate dual kits, both the same mhz speed though.
The only difference I could see in the BIOS was refresh cycle time was 200 on one set and 174 on the other.
I manually set it to 174 from auto - both sets boot individually but still not together.
 
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egtrev

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Both are 1333.
I haven't messed with the CPU but I assume if it wasn't seated/bent pin, then my old 4 x 4 set wouldn't boot either.

 
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herrwizo

herrwizo

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Feb 17, 2009
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So, bottom line is: this is not a quad-module kit, but two dual-channel kits purchased separately. In such cases, there are no guarantees - this is what "kits" are used for - they are checked for compatibility. In your case, only 2 by 2 modules were checked, not all 4 together, and apparently they are not identical in every way.

Not much you can do, I am afraid. I'd sell all of RAM and get a single set of 4x8GB certified dual-channel kit.
 
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