Safest OC Amount???

astrofighter122 · May 29, 2016

Hey guys, I have an FX-8320E processor with a stock cooler, along with an ASUS M5A78L-M/USB3 motherboard. I was wondering how much of an overclock i can achieve without changing the voltage, as i tried 3.8ghz and I got a BSOD.

dudmont · May 29, 2016

astrofighter122 :

Keep dropping clock speed until you can get through prime95 without a crash. Keep in mind, you may end up not getting any extra clock over stock, with stock voltage. Are you using manual voltage?

photonboy · May 29, 2016

1) You need a better CPU cooler, such as the Cryorig H7 which is reasonably priced, and much better than the stock cooler.

2) Max Turbo is already listed as 4GHz.
There are different TURBO values. There is a maximum one for a low load (ideal for a program using one thread), and as load increases it drops. I doubt it drops below 3.7GHz though.

You can TEST this by running Prime95 and observe the "CPU Speed" in the Task Manager-> CPU Performance... (It won't be exact likely. I show 4.16GHz on my Intel CPU for what I expected to be 4.2GHz).

Anyway, since you really do need a better cooler I wouldn't bother messing around with this anyway.

*If you want to try anyway then this MAY work (I'm not familiar with AMD):

1) System BIOS back to default for CPU/memory (enable the memory profile if you have fast memory that's not showing fast. You can verify memory speed in CPU-Z-> "Memory" tab.

For example, if you have a 1600MHz kit it should show:
a) "DUAL", and
b) 800MHz (under "DRAM frequency)

It's EFFECTIVELY 1600MHz because the data is striped across both sticks. If you show "Single" stick not Dual then you have only 800MHz (half) which will reduce performance in some situations.

2) Run MEMTEST86 for a full pass (roughly 30 minutes for 8GB). www.memtest86.com (may need to change your BIOS boot order so the USB or DVD boots into Memtest86)

3) use "Core Temp" software to observe the temperature. i'm not sure what the maximum recommended temp is, but I believe it's just under 70degC.

4) Prime95 runs hotter than games do. I still recommend it to most people as a worst-case. A more realistic max temp alternative is to convert a video in HANDBRAKE. Observe that Task Manager is about 100% load, and run for at least 10 minutes.

5) overclocking:
a) Simple-> try adjusting the MULTIPLIERS related to Turbo (if you can). Keep the 1-core value the same, but raise the lower ones by 2 (assuming 100MHz base clock so for example a multiplier of "36" would give you 36x100MHz = 3600MHz. Raise that to "38" and you have 3.8GHz.

b) BIOS or Windows motherboard utility-> automated presets attempt to overclock.
However, probably do not run long enough to raise the temperature.

c) advanced-> recommended if you have a much better CPU cooler. Possibly combine the MULTIPLIER technique with raising the voltage slightly. Again, AMD is not my area of expertise.

Summary:
- better CPU cooler
- multiplier for Turbo if possible
- temperature
- *always TEST memory and CPU to confirm stability the best you can

astrofighter122 · May 29, 2016

dudmont :

astrofighter122 :

Keep dropping clock speed until you can get through prime95 without a crash. Keep in mind, you may end up not getting any extra clock over stock, with stock voltage. Are you using manual voltage?

Yes.

astrofighter122 · May 29, 2016

photonboy :

1) You need a better CPU cooler, such as the Cryorig H7 which is reasonably priced, and much better than the stock cooler.

2) Max Turbo is already listed as 4GHz.
There are different TURBO values. There is a maximum one for a low load (ideal for a program using one thread), and as load increases it drops. I doubt it drops below 3.7GHz though.

You can TEST this by running Prime95 and observe the "CPU Speed" in the Task Manager-> CPU Performance... (It won't be exact likely. I show 4.16GHz on my Intel CPU for what I expected to be 4.2GHz).

Anyway, since you really do need a better cooler I wouldn't bother messing around with this anyway.

*If you want to try anyway then this MAY work (I'm not familiar with AMD):

1) System BIOS back to default for CPU/memory (enable the memory profile if you have fast memory that's not showing fast. You can verify memory speed in CPU-Z-> "Memory" tab.

For example, if you have a 1600MHz kit it should show:
a) "DUAL", and
b) 800MHz (under "DRAM frequency)

It's EFFECTIVELY 1600MHz because the data is striped across both sticks. If you show "Single" stick not Dual then you have only 800MHz (half) which will reduce performance in some situations.

2) Run MEMTEST86 for a full pass (roughly 30 minutes for 8GB). www.memtest86.com (may need to change your BIOS boot order so the USB or DVD boots into Memtest86)

3) use "Core Temp" software to observe the temperature. i'm not sure what the maximum recommended temp is, but I believe it's just under 70degC.

4) Prime95 runs hotter than games do. I still recommend it to most people as a worst-case. A more realistic max temp alternative is to convert a video in HANDBRAKE. Observe that Task Manager is about 100% load, and run for at least 10 minutes.

5) overclocking:
a) Simple-> try adjusting the MULTIPLIERS related to Turbo (if you can). Keep the 1-core value the same, but raise the lower ones by 2 (assuming 100MHz base clock so for example a multiplier of "36" would give you 36x100MHz = 3600MHz. Raise that to "38" and you have 3.8GHz.

b) BIOS or Windows motherboard utility-> automated presets attempt to overclock.
However, probably do not run long enough to raise the temperature.

c) advanced-> recommended if you have a much better CPU cooler. Possibly combine the MULTIPLIER technique with raising the voltage slightly. Again, AMD is not my area of expertise.

Summary:
- better CPU cooler
- multiplier for Turbo if possible
- temperature
- *always TEST memory and CPU to confirm stability the best you can

It is said that Turbo Core Control doesn't cooperate with FX processors.

dudmont · May 30, 2016

One way to over-clock is to raise the base clock speed .1ghz and then keep adding voltage till it's stable(as opposed to the method I used on my haswells, which is to add .05volts for every .1ghz I add to all core turbo speeds). Problem I have, I don't know what's a safe voltage for AMD FX chips(I have one in a computer, but it sits in the closet, I've never over-clocked it). I do know they run a bit higher voltage over the comparable Intel chips. I do believe if you do a search on safe max voltage for the FX series, you'll get an answer.
I have to agree with photonboy on a cooler. Tinkering with stock voltage is fine, but if you want to add voltage, you'll need a decent aftermarket cooler. FX put out some serious BTUs.

dudmont · May 30, 2016

One thing that will give you an idea if you got a good chip or not, is to under-volt the chip. Leave the cpu at stock speeds, and slowly lower voltage till it crashes, then add back a tiny little bit of voltage(.01 volts or so). If you can significantly undervolt, then you know you got a good cpu, and you know you can probably add clock speed, even with the stock voltage. In fact, this is how I always start my over-clock procedure, by under-volting the stock speeds, and then moving the dials from there.

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