***official amd 83x0 overclocking thread***

[sswats]

I still can't run Linx.

Prime is sending the temps to 75C even at 1.3v and 4.2GHz. Or even i fI leave the voltages on auto.
I'm running the fans at full blast.
I've reapplied the paste already and it made minimal difference.

 

[pipson]

Post with screenshots: http://forums.overclockers.co.uk/showpost.php?p=25561174&postcount=2453

So ive been able to get it stable at 4.8ghz - passed IBT 10 runs and Prime95 at 30mins no fails.

The only changes i made was ram timings to 9-9-9-24 and CPU ratio to 24 and CPU V to 1.476V.

Temps were fine highest i saw was 66C but most of the time it was under 60C and usually around 56C~.

Now i wanna get to 4.9+, but i think this will be my 24/7 overclock at 4.8.

At 4.9+ (would like to get 5ghz stable) i feel like i need to make a few minor changes to my current settings (which are on the above link) especially to CPU/NB Manual Voltage, DRAM Voltage or anything else???

Also what is the difference in CPU multiplier overclocking and Bus speed? Would there be a difference in performance and temps?

 

[ALXAndy]

Post with screenshots: http://forums.overclockers.co.uk/showpost.php?p=25561174&postcount=2453

So ive been able to get it stable at 4.8ghz - passed IBT 10 runs and Prime95 at 30mins no fails.

The only changes i made was ram timings to 9-9-9-24 and CPU ratio to 24 and CPU V to 1.476V.

Temps were fine highest i saw was 66C but most of the time it was under 60C and usually around 56C~.

Now i wanna get to 4.9+, but i think this will be my 24/7 overclock at 4.8.

At 4.9+ (would like to get 5ghz stable) i feel like i need to make a few minor changes to my current settings (which are on the above link) especially to CPU/NB Manual Voltage, DRAM Voltage or anything else???

Also what is the difference in CPU multiplier overclocking and Bus speed? Would there be a difference in performance and temps?

I run 4.75@ 1.42v so you should be able to reduce the voltage. That's my daily clock. Anything above that and your rig will run hot and tbh it's not worth it.

Glad you're all sorted though man.

RE bus. I can't get 5ghz or any decent clock speed without bus. Mine is at 230 with a 20.5 multi (yes you can do .5, just type it ) and that's why I only need 1.42v. Multi clocking seems to require more voltage and puts out more heat. The bus seems to come at much less of a cost.

I clock by working on the bus first. I go as high as it will allow (testing for stability as you go) and then taking to the multi. So yeah, as I said man it seems the multi alone needs loads more voltage

 

[famas]

did any one find a fix for linx?

I've just tried using it and my cpu usage didnt go above 3% on any core (FX8320)

Also in cpu_z my core speeds constantly changed from 3700 (stock) to 1400 and back again.

 

[Hagar]

did any one find a fix for linx?

I've just tried using it and my cpu usage didnt go above 3% on any core (FX8320)

Also in cpu_z my core speeds constantly changed from 3700 (stock) to 1400 and back again.

Try an earlier version, from memory 0.6.4 works but 0.6.5 doesn't

 

[famas]

cheers got it working with 0.6.4.

I'm still getting fluctuations with the core speed though?

I'm new to overclocking and this is going to be my first proper attempt so apologize for any dumb questions.

I'm running a 8320 on a sabertooth and just having a look at the bios settings.

at the moment I have AI overclock tuner set to auto, I have the options of manual or D.O.C.P. Which is the best to go with?

do I need to disable AMD turbo core?

There is a setting for core c6 state, I'm not totlly sure what this does but at the moment its enabled by default.

APM master mode is also on auto by default.

I dabbled with over clocking my old phenom 2 but only using the multiplier and slight voltage increases.

The sabertooth has a lot more options to play around with and mess up.

I was thinking along the line of increasing the multiplier alone as a start, then increasing the voltages and FSB once I understand a bit more to achieve a higher oc.

I need to go over this thread again but its a long read, just after the essentials if any one can help.

cheers.

 

[ALXAndy]

do I need to disable AMD turbo core?

There is a setting for core c6 state, I'm not totlly sure what this does but at the moment its enabled by default.

Turn them both off.

 

[famas]

cheers for the reply.

I found this video on youtube and have basically followed it but with 8320 settings and a slight increase to the CPU bus frequency 210, (3600ghz)

I've done 5 runs in linx and all is fine and cpu shows the core speed stayed at 3.6 which is all good.

Just got to do some more reading on cpu bus changes and why it changes every thing else to, not quite got my head round it all yet?

 

[famas]

Been having a play today.

Not sure if this is the best way of doing it but i've been increasing the cpu bus frequency by 2 and decreasing the cpu/nb frequency and ht link frequency to try and keep them near their default values.
memory frequency I have left, once its goes above 1800mhz I will decrease it.

I'm at stock voltage of 1.368750 for the cpu
and 1.187500 for the cpu/nb.

I've tested after each 2 increases in cpu bus with 5 runs of linx and cinebench.

I dont know if these results are consistent so if someone could look ever them and advise that would be great.

This is what I got at 212 fsb = 3.7ghz in linx.

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and results in cinebench

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This is my last result with no crashes yet.
234 fsb = 4095mhz stock volts 1.368750

linx results

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and cinebench results

[/URL][/IMG]

cheers.

 

[alex_123_fra]

Good so far Famas. I found that >230 on the FSB became unstable so that is when I started bumping up the multiplier. I have now left it at 225 FSB and 21.5 multi for 24/7. Voltage is 1.44 if I remember correctly.

 

[famas]

cool cheers for the reply alex.

Is there a limit I should stop increasing the FSB?

I'm at 248 on the fsb which is giving me 4340ghz.
I've just done 5 runs in linx and no crashes.

Should I stop increasing the fsb now and start increasing the multiplier, or should I carry on increasing the fsb untill i get a crash then back it off and start upping the multiplier?

cheers.

last run with linx

[/URL][/IMG]

 

[famas]

Right I've hit the first wall.

252 fsb = 4410mhz passes 5 runs of linx.

254 fsb = 4445mhz gives me an (access violation error?) when windows starts and fails linx on the 3rd run.

So i've backed it off to 252fsb and all seems ok.

So now Do I need to start increasing the voltage? then continue increasing the fsb or the multiplier?

at the moment the cpu voltage is 1.368750

How much should I increase the voltage by at a time? Think I've read that 1.5v is the maximum voltage you should go to if temps allow?

So does an increase of 0.0100 at a time seem ok?

So my next voltage increase should be roughly 1.378750

 

[gpuerrilla]

Upto 1.45 should be fine if you have a good cooler. Try multi too and get a balance, when you are stable enough start backing off the voltage to get it cooler under load.

 

[famas]

I'm on water so should be ok.

It fails linx at 4445mhz with a fsb of 254, 17.5 multiplier.

Would it be exactly the same and fail linx if I had an fsb of 247 and upped the multiplier to 18 giving me 4446mhz.

Have I found the limit of the current voltage and can only increase the voltage now to get a higher oc?

Is 0.0100v a good amount to start increasing by?

sorry for all the questions.


Edit

Just tried it with 247 fsb and 18 multiplier and it failed linx same as before so going to start upping the voltage.

one other thing, I have the cpu LLC set to medium and the cpu/bc LLC set to regular, would it be worth increasing these both to high?

cheers.

 

[ALXAndy]

If you increase the LLC it will start adding voltage to your CPU. I enabled it extreme once and it over rode my voltage setting and just shoved 1.5v through the CPU continually.

I'm quite amazed you've got your FSB that high tbh, though I've never really sat and tried only using the FSB. I run mine at 230 with a multi of 20.5 and 1.42v.

 

[danirich26]

I have an FX8350 on an M5A99FX Pro R2.0 board, it's being cooled by an NZXT Kraken X40 with push/pull... but it isn't that cool! I know the CPU section on HWMonitor i actually the socket temps, and the package is the CPU itself, according to AMD, the thermal limits for the socket on the 8350 is 70... I'm at a multiplier of 21.5 and a bus speed of 205.68 with a clock of 4422.13MHz (http://valid.canardpc.com/c5vlh6) and in prime 95 i seem to be hitting socket temps of 59-63 degrees depending on how long it's run for, it is completely stable at 1.28V and ran through 20 tests of Prime95 without failing... You guys seem to be able to get mid 30's on the socket... How on earth can i lower the temps of my socket?! That's all that's holding me back,the actual core goes nowhere near its thermal limits! I have a 220mm fan pushing air directly onto the board/GPU and i assumed some incidental airflow might result from that but apparently not!

 

[gpuerrilla]

Could be false readings. You should be able to put around 1.45 through that to see what it can reach.

 

[Hagar]

If you increase the LLC it will start adding voltage to your CPU. I enabled it extreme once and it over rode my voltage setting and just shoved 1.5v through the CPU continually.

I'm quite amazed you've got your FSB that high tbh, though I've never really sat and tried only using the FSB. I run mine at 230 with a multi of 20.5 and 1.42v.

I had 302 bus clock frequency on my FX8350 with an ASUS M5A99X x16 giving 4832Mhz. I have not been able to repeat this clock frequency on my crosshair which is dissappointing.

I use ultra high LLC for CPU and high for CPU/NB

andy.

 

[ALXAndy]

I have an FX8350 on an M5A99FX Pro R2.0 board, it's being cooled by an NZXT Kraken X40 with push/pull... but it isn't that cool!

Little single rad coolers are useless on 83x0. I had a H60 and couldn't even hold 4.2ghz.

If you want big clocks you need a Kuhler 920, H80, H100 or any other double thick/long rad.

 

[famas]

I've managed to get 5 runs of linx stable at 4446mhz at stock volts (1.368750) by increasing the cpu LLC to high and the cpu/nb LLC to high but this has added 4-5 degrees of heat when testing.