Help OCing FX 6350

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Tazz4795

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Apr 19, 2014
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Hi i am a beginner OCer and I have recently started over clocking my amd fx 6350 but i am only able to pull 4.3ghz stable without changing the stock voltage. Anything over that and the prime95 tests have cores fail. So i started tweaking the voltage a bit while raising it to 4.4ghz. I worked the voltage all the way to 1.41volts and still cannot get it stable. Im scared to go any higher than that. How far can i raise the voltage and still be safe? My temps remain very low. Around 22c idle and 45c max load. I have disabled cool n quiet and a few other settings in the bios but i feel as though i should be able to pull at least 4.5ghz out of my rig.

Heres what i have.
Amd fx 6350
Gigabyte ga 970a ud3p mobo
8gb (2x4) Vulcan ram
Corsair CX 600
Pny gtx 770 2gb
CM hyper 212 evo
And a few case fans

What am i doing wrong? Are there other settings i should be changing?
So far i've tried changing the bclk to 210 and the multiplier to 21.

Thanks for the help in advance

 
Solution
maddogfargo
Your chip may or may not hit the same speeds as others. But I was able to get to 4.950GHz max stable with the exact same CPU and motherboard. I settled on 4.8375GHz at 1.4375v core with LLC on extreme for my final settings. Note: I was using a Corsair H110 liquid cooler, so you will not hit this high on a Hyper 212 EVO. But this CPU has a lot of potential. I hit 4.5GHz stable at just 1.35v core and LLC on medium. Temps were VERY low.

To answer your questions on what is safe: For a 24x7 overclock, stay below 1.475v core and 55c under stress testing loads. Medium or Extreme LLC will add a little voltage under load and you want some room for fluctuation.

I have been doing this for 10+ years. Prime 95 is good for telling you...
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maddogfargo

maddogfargo

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Nov 28, 2006
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Your chip may or may not hit the same speeds as others. But I was able to get to 4.950GHz max stable with the exact same CPU and motherboard. I settled on 4.8375GHz at 1.4375v core with LLC on extreme for my final settings. Note: I was using a Corsair H110 liquid cooler, so you will not hit this high on a Hyper 212 EVO. But this CPU has a lot of potential. I hit 4.5GHz stable at just 1.35v core and LLC on medium. Temps were VERY low.

To answer your questions on what is safe: For a 24x7 overclock, stay below 1.475v core and 55c under stress testing loads. Medium or Extreme LLC will add a little voltage under load and you want some room for fluctuation.

I have been doing this for 10+ years. Prime 95 is good for telling you which cores are weak, but not much else. I recommend using AMD Overdrive or OCCT instead.


I take a 3-step approach:

1) I do a 15-30 minute quick test while tweaking settings to get my numbers close to stable. This stresses and heats the CPU, VRU and chipsets for a quick check to make sure things are staying within safe margins.
2) When getting close to my goal, I do a 1 hour test to confirm short term stability.
3) Once I'm happy with what I believe will be my final settings, I do an 8 hour stress test to confirm my final settings are good.

I've used this method for the last 12 builds I've done. Only 2 have needed a small voltage bump after the 1 hour test to pass the 8 hour test. You can test for longer if you like, but honestly it isn't necessary and a 24 hour test isn't safe unless you're going to stay up all night and babysit it. None of my builds have had any hardware instability issues pop up after the fact.


Make sure ALL of your powersave settings are OFF in the BIOS and your CPU fan is set to PWM with the ramp-up value somewhere in the middle of the scale. Don't use the silent setting on an AIR cooler.

Keep your HT, NB and RAM speeds at or below stock when tweaking the CPU.

Remember to give your NB, HT and RAM voltages a small bump when you OC them, as FSB speed affects more than just the CPU.

Here is a very good guide that I've been using with great success for 4 of my recent FX builds and even an old Phenom II x6 rebuild:

http://www.overclock.net/t/1140459/bulldozer-overclocking-guide-performance-scaling-charts-max-ocs-ln2-results-coming


My final settings:

FSB = 225
HT = x12 for 2700 @ 1.25v (* Stock multi, voltage bumped up)
NB = x11 for 2475 @ 1.150v (* Stock multi, voltage bumped up)
RAM = x8 for 1800 @ 1.53v (* DDR3 1600 @ 1800 needed small voltage bump but timings stayed stock)
CPU = x21.5 for 4.8375 @ 1.4375v
CPU NB Core = 1.2875v (* CPU IMC voltage bump needed when you OC RAM. Helps with stability a lot.)
 
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Solution
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Tazz4795

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Apr 19, 2014
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Wow thanks i think i will try upping the voltage a bit then using amd overdrive. But for the LLC, all i see in my uefi bios a % value for that and when i try to change it it just goes back to 100%. Idk much about LLC or how it works. Maybe you can tell me about that? Also when changing cpu frequencies should i be changing the bclk value or the multiplier or both? Thanks for your help so far.
 
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maddogfargo

maddogfargo

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Nov 28, 2006
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Hope it helps. I've been editing/adding a bit to my reply so there may be a little more info there since you read it last. But I had a LOT of fun tweaking this board and CPU.

I got a GREAT chip for it to do 4.5GHz at below stock voltage. But on average you have a very good chance of hitting 4.4-4.5 on that air cooler. I did an FX 6300 build un the UD3 version of that board (* same 8+2 phase power, similar VRUs as the UD3P) last year and got 4.4GHz on stock voltage with just a multiplier bump and turning off all the powersave settings. He didn't want to OC FSB, RAM or HT. We also used the Hyper 212 EVO for that build. Hit around 52-53c during stress testing. So that's probably a pretty realistic target.

For LLC settings: On the 970A-UD3P board in my BIOS it is at the bottom of the Advanced Voltage Settings page. Set it to Medium to start. This will likely keep voltage stable with a medium overclock, maybe a slight .020v droop under load. If you go to Extreme, you will see a lower/normal voltage at idle, but a .030-.040v bump up under load. This is still safe as long as temps are good and you are below 1.488-1.492v. If it pops up to 1.50-1.52v for a short time this is still safe for short term testing, but not good for a 24x7 OC on air.

Use something like gigabyte's hardware monitor for this board or CPUz HWMonitor to keep an eye on idle -vs- load temps and voltages.

Not setting LLC is probably what is causing your instability. Under load voltage can drop quite a bit without this. I would bet you can get it stable with medium LLC and less voltage to start.
 
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BigGig

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Oct 1, 2015
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Thanks for this thread, especially thanks to maddogfargo and mentioning occt. i did not know about occt and its way better than p95. i am getting 4.5ghz on my fx 6300 with voltage boost of 50mv. llc is at medium, which makes 1.33 V under load. after 1 hour the cpu is a bit to hot (62° C), so i am running it now at 4.4 ghz. if someone has a suggestion to lower temp. a bit would be nice. i think i could oc much more, but i dont wanna go to far...
rest is at stock.

mb: ga-990fxa-ud3
aircooling: thermaltight macho rev. a (bw)

btw.: if my english sucks, sry. i am not a native speaker and i am lazy to make it perfect ;)
 
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