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AMD FX Overclocking

humbug said:
That is impressive Matt, i need 1.42v for 4.5Ghz, 1.46v for 4.6ghz and 1.48v for 4.7Ghz, that's as high as i can go with my FX-8350.

Asus Sabertooth 990FX.
Click to expand...

I managed to source an FX-9590.

Initial impressions: i'm quite happy with it.

As a comparison, as you can see in my quote at 4.6Ghz the 8350 ran 1.48v, but that's also with Ultra High LLC, so it would actually run at 1.51v loaded, without that it was not stable, With RealBench Temperatures would run into the mid 70's using this cooler cooler master seidon 120v

by comparisons the 9590 runs at 4.7ghz out of the box with 1.52v. but, that's without any llc, once stressed it will actually drop to 1.44v / 1.428v.
temperatures on realbench are in the mid 60's with the same cooler.

not only is it 10c cooler but it run's at 4.7ghz on load volts that the 8350 would only do 4.5ghz.

i had a play with it yesterday but ran into a glitch.
it ran fine with the turbo core on, until i set the base clock to 4.8ghz, at that it randomly freezes the whole system, i have to hard reset. after that it would no longer run (even at stock) with turbo core on.

i have turned it off now and its running fine.

i'm going to play some more with it today, i'm probably not going to get much more out of it with my cooler, but if i can get it to run at 4.8ghz stable i will be happy.

i'm actually quite happy with it as it is, its much better that my fx-8350 was. :)


 
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looking good humbug, in it's stock setup the 9590 runs at 4.8ghz fully loaded not 4.7ghz. But then like you have I'd be disabling turbo, and manually setting up the multi. Your cooler doesn't look great at all because if you had llc on then those temps for the 9590 would be increased to exactly the same as the 8350.

You were at thermal limits with the cooler on the fx8350, if you had a better cooler that cpu would have achieved slightly more headroom.

Refine the voltages and get a decent cooler.
 
Davedree said:
looking good humbug, in it's stock setup the 9590 runs at 4.8ghz fully loaded not 4.7ghz. But then like you have I'd be disabling turbo, and manually setting up the multi. Your cooler doesn't look great at all because if you had llc on then those temps for the 9590 would be increased to exactly the same as the 8350.

You were at thermal limits with the cooler on the fx8350, if you had a better cooler that cpu would have achieved slightly more headroom.

Refine the voltages and get a decent cooler.
Click to expand...

I was looking at an i100, but turns out that isn't going to fit in my case.

So i'm looking at this. Zalman Reserator 3 MAX Liquid CPU Cooler

I like the idea of that ^^^^ it looks like the fan / HS setup is designed to blow air down on to the VRM's, which is useful.

I also need some new RAM.

Anyway, i turned the LLC up to medium and the multi to 24x, have not touched anything else nor stress tested it yet, first i just want to run it normal, see how it goes. :)
 
humbug said:
I was looking at an i100, but turns out that isn't going to fit in my case.

So i'm looking at this. Zalman Reserator 3 MAX Liquid CPU Cooler

I like the idea of that ^^^^ it looks like the fan / HS setup is designed to blow air down on to the VRM's, which is useful.

I also need some new RAM.

Anyway, i turned the LLC up to medium and the multi to 24x, have not touched anything else nor stress tested it yet, first i just want to run it normal, see how it goes. :)
Click to expand...

have you got the power saving modes disabled?

that causes havoc with overclocking these chips
 
That cooler does not look very good bug, perhaps time for a new case? :D The H100i kicks ass for these chips!

I run my 5Ghz overclock with cool and quiet on and C1E without issue, so the core multiplier drops under idle and so does voltage. Turbo core is disabled though because it kills overclocks.
 
I have an 8320e, a Sabertooth 990fx (Rev 1) and a good cooler.

I am also a clocking noob.

What are some failsafe settings for a decentish overclock?

So far I have just ramped up the multiplier to 20 and left it at 4Ghz.
 
Hi,

I've managed to get my 8350 up from 4.4 to 4.6 and its stable so far in an hour of Prime95, I cant get it to 4.7 it wont boot, its showing as 4.62 in Windows

Does anyone know why its showing with .2? I've never seen it before and how does everything in in HWINFO look please?

CPU_zpsf898b2af.jpg
 
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Random quesion as i have been out the AMD cpu loop for over a year.

Do MSI boards still have VRMS that melt/go pop when OC'ed? lol
 
Relentless81 said:
Hi,

I've managed to get my 8350 up from 4.4 to 4.6 and its stable so far in an hour of Prime95, I cant get it to 4.7 it wont boot, its showing as 4.62 in Windows

Does anyone know why its showing with .2? I've never seen it before and how does everything in in HWINFO look please?
Click to expand...

Need to get a better reading on that voltage. It wont boot as it will require an increase there (around 1.4v+) and possibly in the northbridge to be stable. For my 8320 it is anyway. For the newer binned E's you could get away with lower I guess.
 
MrMD said:
Random quesion as i have been out the AMD cpu loop for over a year.

Do MSI boards still have VRMS that melt/go pop when OC'ed? lol
Click to expand...

AFAIK most boards now throttle before that happens but I guess that is still a possibility with a very old board and/or with no VRM cooling, but they are unlikely to officially support most of the fx range anyway. The newer E range probably wouldn't even have a problem running some older boards. Would take a brave person to try it though!

As for the intel salesmen who popped in, everyone already knows Intel are generally faster, but they are either expensive or they are limited/restricted at the same price point. AMD offers bang for bucks without restrictions which make OCing them seem extra fun. The fact that sometimes these little "dead" chips still sometimes keep up with your beloved intel offerings, just make it even better.

Anyway back to the main topic. OCing AMD chips is fun and something I have always loved doing. Even with my old restricted 1055T it was fun (fsb 324 anyone :eek:). Currenly I'm running a little fx8300 that has a lower base clock to achieve 95w so I guess its lower binned one too. Anyway, this does not seem to have hindered the OC too much as its currently sitting on a Sabertooth at 4.8 with 1.488 rock solid stable with just a multi change. It does seem to have a hard cap at 4.9 though, as core 7 or 8 fails under heavy load at any higher, no matter how much voltage I pump through the poor thing. Unfortunately the sabertooths sound has failed so probably need to rma it :(

What the highest fsb people have tried?
 
Scurburg said:
Unfortunately the sabertooths sound has failed so probably need to rma it :(
Click to expand...

My Sabertooth sound seemed to coincide when I updated a BIOS revision. I flashed to the newest one when that came out and it did not fix the problem.

I ended up buying a cheap OEM on the MM to offer an alternative to my gaming keyboards built in sound.

Must be pretty common with them then as I read a few others had this issue on the Asus forums.
 
Th0nt said:
Need to get a better reading on that voltage. It wont boot as it will require an increase there (around 1.4v+) and possibly in the northbridge to be stable. For my 8320 it is anyway. For the newer binned E's you could get away with lower I guess.
Click to expand...

Thats the weird thing its stable, 1.5 hours in Prime95 so far with no issues. I have LLC set to Extreme and it goes to 1.4v+ under load, I know thats not ideal but if I turn the voltage up and LLC down it becomes unstable
 
Ok, I've just read into LLC and determined that my overclock is a bad one, my clock speeds voltage requirements are being met by LLC and VBoost rather than the VCore setting

It seems I need to set LLC lower and set the VCore correctly, IE start all over again?
 
Here's my attempt from a while back with the 8320E @ 1.32v for 4.4GHz.

http://i.imgur.com/WvgdHJu.jpg

I was using IBT to stress that. It was reaching it's thermal limit at 4.6GHz (it was pulling 1.4v for that) and ramping down to protect itself. I could probably have had it at 4.6GHz stable if I'd used Asus Realbench or something that wasn't as aggressive as IBT. And a larger cooler. Phanteks with 120mm fans on it. But anything larger wouldn't fit in my case.
 
Relentless81 said:
Ok, I've just read into LLC and determined that my overclock is a bad one, my clock speeds voltage requirements are being met by LLC and VBoost rather than the VCore setting

It seems I need to set LLC lower and set the VCore correctly, IE start all over again?
Click to expand...

I had the same problems understanding LLC and made the mistake on setting to extreme and relying on it to raise the voltage under load. On extreme if volt was set to 1.475 the voltage was actually 1.5+ under load. This was killing my VRM temps too. Ideally what you need to do is set the LLC so that it just manages to compensate for vdroop, so you will need to try the different levels and then stress the cpu to see which setting is the best match to the vcore volt you set. I used cpuz and P95 to do this. I believe this setting maybe different for each setup so copying someone elses settings may not work as intended. For me, high seems to be the sweet spot.
 
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Thanks, I dont mind the work to get a proper over clock I'm just glad I now understand LLC better and you're right might vrm temps are high and my cpu temp hits 61 at 4.6 after about an hour of p95 but doesn't get over 50 when gaming so I'm hoping a better overclock will resolve that

I'll start again this weekend
 
Relentless81 said:
Thanks, I dont mind the work to get a proper over clock I'm just glad I now understand LLC better and you're right might vrm temps are high and my cpu temp hits 61 at 4.6 after about an hour of p95 but doesn't get over 50 when gaming so I'm hoping a better overclock will resolve that

I'll start again this weekend
Click to expand...

Other advice I can offer is, don't use p95 as a stability test, its only good to find out LLC settings quickly, max temps or if you have a weaker core (like I have on core 7/8). Running it for hours is really not needed.

Realbench is the best for stability testing IMO and it seems others agree.
 
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