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Discussion Starter #1
Hi Guys,

I have an Intel i5 4690k CPU that has been overclocked to 4.5ghz for a long time now. Recently I upgraded to 32gb of DDR3 2133mhz RAM and that's when my instability problems started. I did some reading and apparently Haswell can become unstable when you overclock the CPU and the memory at the same time.

What's really strange is that my computer passes all the stability tests that I run (Aida64, Prime95, Intel Burn Test, OCCT, ROG RealBench, plus 12 hours of Memtest86+). What's happening is the computer will give me a BSOD about once a week. Sometimes the BSOD says "memory_management" and when I look in Event Viewer it's kernel related.

If any of you guys have any tips on how to stabilize Haswell I would really appreciate it. I have tried giving more voltage to the ring bus, more system agent voltage, plus a few others. I went through every possible option in the BIOS and tried to give it a little bit more juice but my system is still a tiny bit unstable.

Right now I have the CPU at 4.4ghz at 1.2v. I was running at 4.5ghz at 1.25v for months and I never had a BSOD until I upgraded the RAM. I am getting BSODs with the RAM at stock and also when it's overclocked to 2400mhz. The RAM passes Memtest though at both settings.

Here are my system specs if that helps:

Gigabyte Z97MX Gaming 5 (latest bios)
Intel Core i5 4690k
32gb G.Skill DDR3 2133 RAM @ 2400mhz (1.65v, standard timings)
Thermaltake 750w PSU
Sapphire Radeon 280x

My system seems completely stable when I set the RAM to 1600mhz. I'm wondering if there is a way for me to stabilize my system with the RAM running at a higher speed.

Thanks guys I hope you have some ideas for me!
 

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WaterCooler & Overclocker
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2,590 Posts
Quote:
Originally Posted by SickBeast View Post

Hi Guys,

I have an Intel i5 4690k CPU that has been overclocked to 4.5ghz for a long time now. Recently I upgraded to 32gb of DDR3 2133mhz RAM and that's when my instability problems started. I did some reading and apparently Haswell can become unstable when you overclock the CPU and the memory at the same time.

What's really strange is that my computer passes all the stability tests that I run (Aida64, Prime95, Intel Burn Test, OCCT, ROG RealBench, plus 12 hours of Memtest86+). What's happening is the computer will give me a BSOD about once a week. Sometimes the BSOD says "memory_management" and when I look in Event Viewer it's kernel related.

If any of you guys have any tips on how to stabilize Haswell I would really appreciate it. I have tried giving more voltage to the ring bus, more system agent voltage, plus a few others. I went through every possible option in the BIOS and tried to give it a little bit more juice but my system is still a tiny bit unstable.

Right now I have the CPU at 4.4ghz at 1.2v. I was running at 4.5ghz at 1.25v for months and I never had a BSOD until I upgraded the RAM. I am getting BSODs with the RAM at stock and also when it's overclocked to 2400mhz. The RAM passes Memtest though at both settings.

Here are my system specs if that helps:

Gigabyte Z97MX Gaming 5 (latest bios)
Intel Core i5 4690k
32gb G.Skill DDR3 2133 RAM @ 2400mhz (1.65v, standard timings)
Thermaltake 750w PSU
Sapphire Radeon 280x

My system seems completely stable when I set the RAM to 1600mhz. I'm wondering if there is a way for me to stabilize my system with the RAM running at a higher speed.

Thanks guys I hope you have some ideas for me!
I would try increasing the RAM voltage from the current 1.65v. You should be able to go up to 1.75v safely.

You can increase it a little at a time, but if it was me I'd go right for 1.75v and see if it's stable, then back down from there.

The system agent voltage is the other voltage that can be increased to stabilize RAM. I had to take my Asus board System Agent off of Auto and increase it manually. I think it's around 1.20v or 1.21v can't remember at the moment.

You might be able to just increase the System Agent voltage and leave the RAM voltage at the stock 1.65v setting. This is what I currently an running.

Good luck!
 

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Discussion Starter #3
Quote:
Originally Posted by Barefooter View Post

I would try increasing the RAM voltage from the current 1.65v. You should be able to go up to 1.75v safely.

You can increase it a little at a time, but if it was me I'd go right for 1.75v and see if it's stable, then back down from there.

The system agent voltage is the other voltage that can be increased to stabilize RAM. I had to take my Asus board System Agent off of Auto and increase it manually. I think it's around 1.20v or 1.21v can't remember at the moment.

You might be able to just increase the System Agent voltage and leave the RAM voltage at the stock 1.65v setting. This is what I currently an running.

Good luck!
Thanks! You were right, I needed 0.05v more RAM voltage for it to be stable. Is this normal in a 4 dimm configuration? I'm asking because my RAM needs 1.65v to be stable at 2133mhz whereas it's specified to run at 1.6v at that speed. I'm wondering if I should think about RMAing my RAM.
 

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WaterCooler & Overclocker
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2,590 Posts
Quote:
Originally Posted by SickBeast View Post

Thanks! You were right, I needed 0.05v more RAM voltage for it to be stable. Is this normal in a 4 dimm configuration? I'm asking because my RAM needs 1.65v to be stable at 2133mhz whereas it's specified to run at 1.6v at that speed. I'm wondering if I should think about RMAing my RAM.
If it passed the Memtest86 tests you ran, then the RAM should be fine. Just run it with the required voltage to be stable and you should be fine.

G.Sklll makes great RAM! Never had to rma a single stick!
 

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I got lucky with my G.Skill 1866mhz RAM. I got it running 2400 MHz at 1.65v with the help of looser RAM timings, VCCSA/VCCIO 0.005+v offset. Sometimes increasing the system agent voltage is only required to get the RAM stable at X.M.P settings.
 
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