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AMD FX Overclocking

Nutella33 said:
Cheers.

Have you made sure nothing is set to auto that might be overruling your voltage inputs? That's the only thing I can think of
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Only the LLC setting mentioned above is auto. I'll be trying that as suggested further up next time I try. It's deinitely not just something overiding it and applying a fixed voltage, as whatever the bios setting is, it's 0.02/3 above it under load.
 
C35799Gamble said:
Oh dear not good. Were you able to do anything with warranties and have you replaced the MSI components?
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I got a refund on the 8350 and a replacement on the MSI components but my trust in them is completely gone, once i can afford another CPU I'll be upgrading my dads pc with them as he is into older games so OCing means nothing to him.
 
Davedree said:
Try high llc and see if you can hold your desired voltage. Just a question what cooler do you have?
What are you using to load up the cores for testing stability?
And what are your package and cpu temps?
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Just an update on the overvolting, high llc seems to have sorted it. The rev1 definitely seems odd, at least with the fx series.

Turbocore off, high llc, manual voltage of 1.38. Sits at 1.38 in bios and 1.38 underload, great no overvolting.

Offset mode, well, this rev1 is full of surprises there. High llc and offset mode set to auto and we are back to 1.42V in bios and 1.44/5 underload. Here is where it gets really odd, but workable. Negative offset of 0.006250 brings it down to 1.368 in bios and a perfect 1.380 under realbench :). Idle and clocked down is 0.948, moreless where it is normally, so I don't think idle stability will be a problem.

So that's ok. But that is the smallest offset I can give it, next is auto. Quite a problem if I need say 1.4 when I get back to overclocking. So just as a test I thought I'd give it a postive offset. Positive offset of 0.006250 = 1.38 in bios :confused:.

Got no explaination for that, unless Auto is just taking 1.42 from turbocore regardless of being on or not. But I can work with that, 1.38 under load now and the next setting will 1.39/4 I guess. Realbeach run at that max voltage didn't really drop the temps too much, max 53c vs 55 before. But then it has warmed up a bit since last time. Going to clean out my case anyway, get rid of some of the dust and try to get some better airflow before messing around (few cables in the way), but at least the voltages are behaving now.
 
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Ok, its finish. The chip looked promising firt time, but after 4900 MHz everything changes. For 4900 MHz it was OK all around 1.39-1.412V. But for 5 GHz I must jump voltage up to 1.475 to 1.5V (depends at test). And maximum for Cinebench was "only" around 5050 MHz with 1.535V.

Cinebench R10 single thread



Cinebench R11.5


Cinebench R15


for fun Cinebench 2003 :)



After I tested the modules and one is crap. The best modules are 2nd a last one. No problem over 5500 MHz idle.


max validation with 1.57V, 5628 MHz
http://valid.canardpc.com/u7k6si


Superpi 1M and 32M at best module (core 6+7)
the good things, this chip has very good CPUNB. 1.325V and over 2800 MHz for Superpi 32M




 
Hey guys im looking to overclock my gaming rig but dont know where to start! heres my specs..

AMD Bulldozer fx 8320 3.50ghz
Asus M5a99x evo r2.0
Kingston hyperx genesis 2x 4gb
Corsair GS600 powersupply
coolermaster hyper 412s cpu cooler
HIS HD 7950 gpu
Coolermaster Half 912 case with standard fans

looking to get the most out of it for playing arma 3 any ideas?
 
its not special cooling and PSU for high OC. I think, around 4-4.4 GHz will be OK with your rig. Because Vishera COPUs are hungry for current from VRM of motherboard--> strong VRM of MB and stron rails of PSU = CPU need some ampers :)

So disable turbocore, disable APM master, set load line calibration to high-ultra high, set your VRM respons time to extreme mode or manually to 400 KHz.
After set your CPU voltage to 1.425V and try multiplier 42x, 43x, 44x and test it in stress test.
 
C35799Gamble said:
Thanks! I will test this tonight when I get home from work, overclock to the point I had issues and let you know how it goes :)
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How did disabling it go?

C35799Gamble said:
You are 100% correct. I never bought my 8350 thinking it would be the i7 equivalent but i knew it would do me well.

When I got around to overclocking I have now got 4.5ghz out of my chip with NO temperature increases at all!!!!(doing it manually instead of using the rog level up) Absolutely amazing! I just wonder what I can get until temps start to increase. That us this weekends plan :)
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What have you ended up at Gamble?
 
Th0nt said:
How did disabling it go?

What have you ended up at Gamble?
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Disabled it and it worked perfectly, no glitches or freezing with flash based websites. :)

Also, I completely redid my overclock which I think I posted here but ended up at 4.6ghz at stock vcore with around 1/2 degrees increase on load only. Were talking 30 degrees idle/45degrees load.

I got advised for a 24/7 oc, to leave it as it is as anything higher wont really have a major impact.

Happy with that result :)
 
I've got my FX-8350 to 4.5GHz using 1.45v.

I do not think this is a great clocking CPU...

I'm sure there's probably a little bit more that can be squeezed out of it, but it really doesn't seem worth the effort with the AMD chips.
 
Davedree said:
Pretty poor if honest, what is your voltage and what are you using for testing ?
and what are you core temps and cpu temps?
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1.36v. Games and general usage I guess, though I once ran Intel Burn test for a few hours. Core temp stays below 60c, socket temp stays below 72c.

I'm sure I could squeeze a bit more out of this CPU if I bumped up the voltage and got a better cooler, but I'm not seriously into this overclocking business and I'm happy with what I've got. I just felt like replying. :p
 
C35799Gamble said:
Disabled it and it worked perfectly, no glitches or freezing with flash based websites. :)

Also, I completely redid my overclock which I think I posted here but ended up at 4.6ghz at stock vcore with around 1/2 degrees increase on load only. Were talking 30 degrees idle/45degrees load.

I got advised for a 24/7 oc, to leave it as it is as anything higher wont really have a major impact.

Happy with that result :)
Click to expand...

Great news!

I am gonna give the offset route a go, whats the best way to start this method?

Do I leave the LLC settings out of this, or set them first and work back?
 
Th0nt said:
Great news!

I am gonna give the offset route a go, whats the best way to start this method?

Do I leave the LLC settings out of this, or set them first and work back?
Click to expand...

My oc is completely manual but from what I have read about offset, set llc first and work back. A few places mentioned 75% llc, and then also changing vcore phase control to enable offset(this may just be Rog boards though)

What benefit does offset give over manual?
 
Offset should allow the CPU to throttle back when idle to save power (well apply the boosted amount when required). I am using the Sabertooth Rev 2 board anyone else have this that want to share settings?

I tweaked the offset and benched which worked well @ 4.4Ghz to start. Then when I introduced power saving features it would not load windows only a blank screen. The next boot it mentioned failed overclock.

Time to get back into the dirty world of the UEFI and its poorly described features that make little sense... :)
 
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