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Motherboard RAM issue ASUS P8H77-M/CSM Intel H77

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April 13, 2013 12:40:57 PM

Hey everyone, I have a problem and hopefully someone has encountered this before.

This is the first PC I've build (had a PC knowing friend check that all the parts are compatible). Everything is working perfectly, however, once I bump up the RAM over 8GB, the red led light lights up and I have no screen signal.

CPU: http://www.tigerdirect.ca/applications/SearchTools/item...
Mobo:http://www.tigerdirect.ca/applications/SearchTools/item...
RAM:http://www.tigerdirect.ca/applications/SearchTools/item...

got a GTX 660 OC 2GB if it matters

600 Watt power supply

I know nothing is wrong with the RAM since my previous MOBO was running all 4x4Gb sticks perfectly, and I've also switched up the sticks on the current MOBO. The only problem is when there's more than 2 at a time.

I've also updated the BIOS to the latest build. I've tried standard and performance profile, doesn't change a thing.

I've also made sure that the voltage is at 1.65v , tried BIOS AI overclock tuner, set it at XMP profile 1. Didn't allow me to plug in more than two (8GB).

I've also tried pulling out the mobo, powering it up outside the case. No changes.

I'm at my wits end, I know that 8GB is enough for pretty much anything, but it would be nice if I could use all 4. If anyone has any ideas it would be great.
a c 1121 V Motherboard
April 13, 2013 12:49:20 PM

Well Intel lga 1155 system runs on 1.5volt ram and Intel actually claims that a CPU damage can happen over time if ram voltage exceeds 1.55volts.
Have you reset CMOS after installing all 4 modules?
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April 13, 2013 1:48:35 PM

rolli59 said:
Well Intel lga 1155 system runs on 1.5volt ram and Intel actually claims that a CPU damage can happen over time if ram voltage exceeds 1.55volts.
Have you reset CMOS after installing all 4 modules?


Well the BIOS automatically puts it at 1.65v and it's written 1.65v on the ram stick so I haven't touched the voltage yet.

As I mentioned I'm pretty new at this, is CMOS the came thing as BIOS? If so, yes I have tried to reset the BIOS settings, it's at standard default right now as I have no need to overclock.
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a c 1121 V Motherboard
April 13, 2013 7:02:15 PM

It is because the spd for the ram is 1.65 volts. Does not change that they came out with ram with 1.5volts for lga1155 systems.
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April 14, 2013 4:13:47 AM

rolli59 said:
It is because the spd for the ram is 1.65 volts. Does not change that they came out with ram with 1.5volts for lga1155 systems.


Ok should I only change the voltage and leave everything else alone? Would that make it so I can use 4?
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a c 1121 V Motherboard
April 14, 2013 5:00:21 AM

I do not think that would work rather you would have to change ram to 1.5volt ram but I am not entirely sure it would solve your problem. With 4 sticks most boards limit speed and command rate has to be set at 2T to work.
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