FX8320 OC advice

Swordfish125

Swordfish125

Swordfish125

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23 Sep 2008
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357
Hi,

Started to OC my FX8320 yesterday, Currently I have it running @4.4ghz (x22 ,multi) And about to run a prime test overnight (Ive ran prime for about 2hours, no errors).
Im running it on a Sabretooth 990fx, in the bios I have the VCore showing as 1.296 but when under load its showing 1.308 in CPUZ.
I have LLC at 75%. Is it normal for the VCORE to be doing this? I have it in offset mode, with a -0.0125 adjustment.
Core temp shows a Max of 55.

I've had it stable @ 4.3 with a bios VCORE of 1.284v, under 100% load @1.296v overnight.

Im worried that the temps may be high, and was wondering if im running a good clock, should I be using LLC? There seems to be some debate on this looking around.


I will try to get some screens up later, as it may make more sense. I've only OC'd Intel before and that was some time ago.
 
55C is fine.

Higher LLC settings cause the voltage either to stay the same or increase when under load. If you lower the setting it should stay steady under load, but obviously if that's then not enough voltage, it'll crash.

Keep an eye on temps under realistic load, since stress testing is going to raise them higher than normal.
 
Temps are fine, voltages are fine. Looks to be a golden chip.

You want the voltage to be higher under load to counteract Vdroop, I mean that's the point of using LLC in the first place.
 
Can anyone help with monitoring my NB voltage? Ive not touched it, it shows 1.1v in the bios, but cant find it on CPUID HW monitor, I've got a bunch of VIN numbers but cant work them out.
The NB temp is 39deg, which is fine IMO but I dont want too much running through it
 
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Unless you overclock your CPU-NB and/or run RAM faster than the CPU spec of 1866MHz you won't need to change that voltage as it will not vary and it will not affect stability.

Basically the rule goes like this for FX processors:

1) Is the V-core less than 1.55V?

2) Are some or all of your cores experiencing thermal throttling?

If you answer no to both of them, you're good. Also note that 1.55V is the recommend maximum limit by AMD, if you have water cooling you can exceed that.
 
Swordfish as well as HW monitor i use:

Core Temp http://www.afterdawn.com/software/system_tools/system_information/core_temp_64bit.cfm

Open Hardware Monitor http://openhardwaremonitor.org/

I would be interested in seeing your screenshots as im trying to OC the same CPU, what cooling do you have because im running hot over 4.3 (Up very close to and sometimes hitting and slightly exceeding the 62C mark). My thread is here if its any help http://forums.overclockers.co.uk/showthread.php?t=18534096

My Vcore is also different on my bios and changes in the manner you have experienced on the HW monitors
 
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It's changing because it is supposed to! The only things that matter are the two criteria I listed, provided the system is stable of course.
 
I did some more reading on the LLC and now I have my head round it. I get what it does and how it works.
Still wish I could find my NB voltages. Currently I have them set to auto but the bios shows them as:

NB: 1.110
NB HT: 1.211
NB 1.8v: 1.80

Should I set the voltages above manually, to fix them at these values? Thats what I'm tempted to do, my Ram is 16gb running at 1600.

My CPU/NB offset it also on Auto offset, I dont know if its worth doing this manually, as Im not sure exactly how it works.

I have some screens, just need to get them uploaded. ATM ive been running Small FFT on prime, I need to do another small and then a blend test later.
 
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