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

Hi, I've just recently setup the below system and could do with a bit of help getting the best overclock out of it.

What would you say was the best multiplier / bus speed to go for? If I set the below, I cant pass an OCCT test but 22.5 x 200 @ 4.5GHz seems fine. Temps are around 53-57c under load. It does feel a bit snappier running with a higher bus / lower multiplier.

Should I be adjusting the bus voltage?

8320 @ 4.5 GHz, 220 x 20.5, vcore 1.45
990FXA-UD3 Rev 4
2 x 4GB Kingston 2400MHz (running at 2346 due to multiplier above)
Noctua NH-D14

Thanks!
 
tribz said:
Hi, I've just recently setup the below system and could do with a bit of help getting the best overclock out of it.

What would you say was the best multiplier / bus speed to go for? If I set the below, I cant pass an OCCT test but 22.5 x 200 @ 4.5GHz seems fine. Temps are around 53-57c under load. It does feel a bit snappier running with a higher bus / lower multiplier.

Should I be adjusting the bus voltage?

8320 @ 4.5 GHz, 220 x 20.5, vcore 1.45
990FXA-UD3 Rev 4
2 x 4GB Kingston 2400MHz (running at 2346 due to multiplier above)
Noctua NH-D14

Thanks!
Click to expand...

I've been following the advice on here a few pages back in regards to the FSB approach. I took my BIOS back to its recommended defaults, took the power saving options off and changed my LLC to Ultra High and the capacity to 130%. From there I took my multi all the way down as low as it would go and just kept increasing my FSB until it would no longer boot (not changing any voltages at this point). Once I got my number, 280 in my case at the time, I started to play around with the multi and use a combination of 5 passes through Linx, Cinebench and games to test for temps and stability.

Served me well but it's all very much a learning process for me and think there is still I lot I could do to refine it :)
 
@tribz - not a problem mate. I'm new to all this myself but it's been a good learning curve nonetheless

@JonSmith - downloaded and am running that DPC checker and at desktop it's constant yellow bars with no obvious spikes. I'm going to run BF4 now and tab back and forth to see if I can spot the culprit. (Just constant yellow bars, nothing changes in relation to the CPU spikes I'm seeing in game)
 
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Further update, getting the latest drivers for my soundcard seem to have really dropped the Spiking I'm seeing. They are still there but not as dramatic so we may have a winner. Of all things I thought could have affected my gaming experience, my headphones were not one of them!!!! haha
 
It's good that that it's fixed, constant yellow is a bad sign and the spikes are even worse, it should be completely green.

Also if you have a creative or asus branded card I suggest using these drivers:

http://danielkawakami.blogspot.co.uk/

they reduce the latency even further. I can also suggest updating any other drivers on your system as well, basically anything plugged into a usb/expansion card slot.
 
Well I can't get the DPC checker to drop below the yellow indicator so there's still something going on. I've gone through the device manager and and disable everything which I would class as unneccasary and still not dropping so not sure how to proceed. May attempt this RATTV3 that's mentioned on the website

Edit: Probably should have read it first but supposedly DPCLatency doesn't report correctly in Win8 so don't think I'm ever going to reduce it any further than it's showing. Will have a proper play on the game tonight and see if I notice any improvement
 
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Well I have a very similar to yours (AMD 8320 with an M5a97 EVO R2.0) and my latency is consistently green (between 170-210us). However I am on windows 7 sp1 and run an ASUS Xonar DGX sound card using the ASUS drivers.
 
ll-Nightfly-ll said:
Further update, getting the latest drivers for my soundcard seem to have really dropped the Spiking I'm seeing. They are still there but not as dramatic so we may have a winner. Of all things I thought could have affected my gaming experience, my headphones were not one of them!!!! haha
Click to expand...

You would be surprised how many people have 'upgraded' to intel thinking it was the CPU at fault in some of these circumstances. If it weren't for BF4 and mantle people would be on that theory already!
 
I figured this out when I had a rather quirky socket 939 motherboard. It could quite nicely run my 4600+ at 2.9GHz but man I spent ages figuring out some stuttering issues. I had to manually set the PCI latency to fix them.
 
I used a tool like this:

http://downloads.guru3d.com/download.php/PCI-Latency-Tool-3.1-v2-download-951.html

I don't know about a windows 8 equivalent however.

Also you should set your PCI-E manually to 100mhz with FSB overclocks, but that's a separate issue and doesn't necessarily make any difference on certain boards. On my aforementioned older board I actually had to set it to 103 otherwise it would incorrectly set my PCI-E link state to 1x when I overclocked (and it wasn't a link state power management issue either).

EDIT: Here's something interesting, try this: http://forums.guru3d.com/showthread.php?t=374210
 
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JonSmith said:
I used a tool like this:

http://downloads.guru3d.com/download.php/PCI-Latency-Tool-3.1-v2-download-951.html

I don't know about a windows 8 equivalent however.

Also you should set your PCI-E manually to 100mhz with FSB overclocks, but that's a separate issue and doesn't necessarily make any difference on certain boards. On my aforementioned older board I actually had to set it to 103 otherwise it would incorrectly set my PCI-E link state to 1x when I overclocked (and it wasn't a link state power management issue either).

EDIT: Here's something interesting, try this: http://forums.guru3d.com/showthread.php?t=374210
Click to expand...

That was the first page I came across after your suggestion and that's where I found out that the DPCLatency tool I used (the same as the forum) doesn't report correctly in Win8. I downloaded another tool, LatencyMon I think off the top of my head, and that seemed to be giving pretty consistent, low result.

I think it's as good as it's going to get and don't get me wrong, it's very playable now. Last thing to try would be to double check my PCIE frequency and see if that has any knock on effect. Cheers for the suggestion though, at the end of the day it wouldn't have led me down the right path if you hadn't mentioned your sound card problems :)
 
After doing a bit more digging (it's a slow day in the office! haha) I've come across the mention of the HPET which can be enable/disabled in the BIOS with varying results of improvement. I'll be trying this when I get home later tonight but in the meantime has anyone had any experience with this? From the manual it lives under the south-bridge configuration of my mobo
 
I think its around 1.325 but the easiest way is just to load default and have a look. I've been using HWMonitor as it seems the most reliable. I think it has problems reporting at idle but its bang on accurate at load which is where it counts :)
 
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