RAM freezing PC

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martin.carline

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Nov 12, 2017
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Hey all,

I have recently been having problems with my PC freezing a few seconds sometimes minutes after booting up to Windows 7, and I suspect it could be my RAM that's causing it. Here are my specs -

i7 875k
P55 UD3L motherboard
16gb Corsair Vengeance Pro DDR3 2400Mhz
GTX1060 6GB

I originally had the two 8gb sticks in slots 2 & 4, which was when the PC was freezing. However, as I am typing this I have taken one of the 8gb sticks out of slot 4 (furthest away from CPU) and it is running fine (fingers crossed). I have then swapped the sticks around to test the other one, and the PC is still running fine.

I am yet to do a memtest64 on them both as it takes ages (and don't really understand the results), but just wondering if I've missed something obvious and why 16gb is freezing my machine?

I think the maximum RAM speed for the i7 875k is 1600Mhz, and the motherboard accepts up to 2,400Mhz. I'm wondering if I have bought the wrong RAM or something as I cannot use the XMP profile to set all the timing and voltage to the 2,400Mhz - BIOS tells me after I do that that it won't accept the overclock and sets it back to 1,333Mhz.

Is it freezing my machine because I should have bought only 1,600Mhz and not 2,400Mhz?

Thanks :)


 
Solution
t53186
If you want maximum performance get a 2 dimm kit that is listed on the QVL of DDR 1066/1333. Bios will detect the dimms and set the correct speed, and with two dimms (in the correct MB slots) it will function as dual channel, which is the fastest you system will operate.
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t53186

t53186

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martin.carline

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Nov 12, 2017
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Thank you for taking the time to reply and look into this for me. Are you saying that this RAM is not compatible at all and I should swap it for a lower frequency, or are you suggesting I should lower the frequency down to 1,333Mhz?

Swapping it isn't a problem, but how do I go about lowering the frequency in regards to timings and voltages? I know how to manually input the timings and change the frequency and voltage in BIOS (I think), but would that work?

One 8GB stick is currently running right now and seems stable at 1600Mhz. I have some old 2 x 4gb RAM that I can put back in that also runs at 1600Mhz. Would this be OK in the meantime until I swap it for something else if I can run it at a lower frequency? :)

 
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t53186

t53186

Distinguished
Aug 6, 2006
1,720
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20,465
If you want maximum performance get a 2 dimm kit that is listed on the QVL of DDR 1066/1333. Bios will detect the dimms and set the correct speed, and with two dimms (in the correct MB slots) it will function as dual channel, which is the fastest you system will operate.
 
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Solution
M

martin.carline

Prominent
Nov 12, 2017
62
0
630


Thanks for all your help.

I've had this RAM since 2016 and only recently had the problems with freezing, so I realised that it's because I have been trying to manually push it to 1600Mhz and beyond, as well as tinkering with the timings and voltages. So I've reset the BIOS and it's now at 1333Mhz.

Running ok at the moment, so hopefully I'm safe to continue running it at its lower speed and live and learn when it comes to buying memory I don't need lol

 
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