AMD FX-8350 and 32gb 2400

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twambo

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Sep 23, 2014
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So I'm in the process of ordering new parts for a new computer. But as of now, all I have is ram (G.Skill Trident X 32gb 2400mHz F3-2400C10Q-32GTX) due to my current budget. I decided to try to see if it would work in my current system:

AMD FX-8350
Sabertooth 990fx R2.0

I know that most AMD processors can't go higher than 2133 and that my motherboard only supports up to 1866. But, I still decided to try it. So I plugged in the 2400 kit into my computer and enable DOCP in my BIOS. My BIOS is showing it at 2400 and when I boot it into the OS CPU-z and Speccy are reading the whole 32gb at 2400. How would I try testing the stability of my computer?

Thanks!
 
Solution
gskill support
Memtest only detects any errors within the chips, that doesn't seem to be an issue.

The stability issue is most likely because there is not enough CPU/NB Voltage (memory controller) for full slots of DDR3-2400. Technically the CPU only supports two modules of DDR3-1866, so you are definitely pushing it beyond it's limits. To stabilize it, it is necessary to boost the CPU/NB Voltage. Work your way up until you find a stable value, then retest. Once the system is completely stable, that's when you know you have the correct amount.

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Supahos

Supahos

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Nov 11, 2013
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First thing I would do is run memtest just to make a quick check... If that passes you could try running prime 95 men stress mode and see if its good to go.... Sisandra memory benchmark is another I use sometimes, has crashed memory on previously assumed stable system a time or two
 
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jaimelmiel

jaimelmiel

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May 7, 2012
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When you have your upgrade done and up and running. Also you really want your ram @ the amd recommended speed. The 2400Mhz wil probably show no difference in speed and may not run @ that speed. Also your processor works best @ 1866MHZ with 2 slots filled with 16 GB. This is where pre purchase research comes in. if you fill 4 slots amd recommends 1600MHZ. Also you have a on board memory controller in the FX 8350 that is set to work this way.

Check out the 8th post from the top:
http://www.overclock.net/t/1513004/fx-9370-with-1866-ram



 
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twambo

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Sep 23, 2014
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So my system was running fine the first night I put it in. Then as soon as I got home from work yesterday, I decided to run a few hours of memtest. I got a few passes, so I stopped it. When I went to turn on my computer, it started to crash. Is it normal for problems to arise after testing with memtest?

I'm just curious at this point. My girlfriend decided to buy the rest of the pieces I needed to upgrade my system.
 
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gskill support

gskill support

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Memtest only detects any errors within the chips, that doesn't seem to be an issue.

The stability issue is most likely because there is not enough CPU/NB Voltage (memory controller) for full slots of DDR3-2400. Technically the CPU only supports two modules of DDR3-1866, so you are definitely pushing it beyond it's limits. To stabilize it, it is necessary to boost the CPU/NB Voltage. Work your way up until you find a stable value, then retest. Once the system is completely stable, that's when you know you have the correct amount.

 
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