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Windows unable to boot unless I underclock ram to 1333MHz.

Last response: in Windows 7
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June 30, 2013 4:36:34 PM

My computer refuses to boot into Windows 7 (Ultimate, 64-bit) unless my RAM is severely underclocked to 1333 MHz. I can overclock everything fine, but I cant "neutral-clock" my ram to what it's designed to be set as.

PC Specs:
CPU: AMD FX-8350 Eight-Core Processor (8 CPUs), ~5.0GHz
RAM: Corsair Vengeance Pro RED 16GB (4x4GB) 1866MHz Dual Channel
MB: ASUS M5A97 R2.0
GPU: GALAXY GeForce GTX 560 Ti Superclocked 1GB GDDR5
PSU: Ultra 750W

I'm not sure if my motherboard is defective, my ram is defective, my hard drive is damaged, or windows is corrupt.
June 30, 2013 4:45:46 PM

Have you made sure you have set the timings to what is specified? This is quite important, as incorrect timings can cause failure to boot.
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June 30, 2013 4:57:42 PM

PyjamasCat said:
Have you made sure you have set the timings to what is specified? This is quite important, as incorrect timings can cause failure to boot.

So here is my ram: http://www.corsair.com/us/memory-by-product-family/veng...

The "tested latency" is 9-10-9-27. The SPD latency is 9-9-9-24.
Previously, the timing was 9-11-9-27. I then switched them to AUTO (for all 4; everything else was already on AUTO). I'll set it to 9-9-9-24 and test it, also 9-10-9-27.

I let you know if it works out.
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June 30, 2013 5:27:29 PM

What I did:

Added 4th DIMM; there were only 3 in there set to 1333MHz.
Set DRAM FREQ. to 1866MHz.
Adjusted timings from AUTO-AUTO-AUTO-AUTO to 9-9-9-24

PC running.
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June 30, 2013 5:30:21 PM

ZeroDelta said:
PyjamasCat said:
Have you made sure you have set the timings to what is specified? This is quite important, as incorrect timings can cause failure to boot.

So here is my ram: http://www.corsair.com/us/memory-by-product-family/veng...

The "tested latency" is 9-10-9-27. The SPD latency is 9-9-9-24.
Previously, the timing was 9-11-9-27. I then switched them to AUTO (for all 4; everything else was already on AUTO). I'll set it to 9-9-9-24 and test it, also 9-10-9-27.

I let you know if it works out.


ZeroDelta said:
What I did:

Added 4th DIMM; there were only 3 in there set to 1333MHz.
Set DRAM FREQ. to 1866MHz.
Adjusted timings from AUTO-AUTO-AUTO-AUTO to 9-9-9-24

PC running.


Great! So you only had 3 in when you tried 1866?
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Best solution

June 30, 2013 5:44:47 PM

Yeah I had only 3 because the fan of my HSF is slightly sitting over the far left RAM slot. I just shoved the 4th one in there and everything is running smoothly.
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