Not able to change any settings after RAM upgrade

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baresdakilla

Honorable
Oct 8, 2012
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10,540
Hi guys, I've recently bought 8GB stick of RAM as an addition to the previous 2x2GB setup. After that I'm not able to boot with my overclocked i5-750 no matter what. The overclock was rock stable before but now if I change anything regarding the CPU or RAM in BIOS (even slightest tweak) this massage appears:

BIOS has detected unsuccessful post attempt(s).
Possible causes include recent changes to BIOS
Performance Options or recent hardware change.
Press 'Y' to enter Setup or 'N' to cancel and attempt to boot with the previous settings.

When I press 'N' it restarts and goes on again. My motherboard is Intel DP55KG. The overclock was fine with 2x2GB setup, but with 2x2GB+8GB or just 8GB (yes I've already tried) it just doesn't work. Other strange thing is, that I can boot with the optimized defaults settings. Any suggestion guys?
 
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Calvin7

Titan
Feb 19, 2013
11,725
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By mixing memory kits together, there may be compatibility issues such as unable to boot or unable to operate at rated specifications.

Each memory kit is tested to ensure compatibility within each memory kit. Because memory manufacturers have not tested the new memory kit with your existing memory kit, compatibility is not guaranteed when multiple kits are used.

 
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baresdakilla

Honorable
Oct 8, 2012
38
0
10,540
Yeah sure, I'm aware of that problem, but still. But I would expect to see some instability or something connected to timings etc., you see I can't even change for example cpu voltage. And that has nothing to do with ram I think.
 
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