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

Lostmyrag said:
Talking of Core unparking, do you think this is worth giving a go before i buy a new motherboard to stop my CPU spiking issue? Im basically getting 100% usage for a couple of seconds causing BF3, BF4 to lock up and drop to 1fps. all resumes after about 5 seconds.

If so, how do i do it safely/effectively?
Click to expand...

Are you on Windows 7? As it's only for that. I did it with this tool:

http://www.coderbag.com/Programming-C/Disable-CPU-Core-Parking-Utility

You can enable or disable it easily, just requires a reboot in between.
 
teppic said:
This was all done on the latest drivers, tested on both Windows 8 and 7 - can say for sure it's the CPU not coping with the engine since the i7 was stutter free. I didn't physically remove one of the 670s, but I definitely tested with SLI disabled to try to rule that out. LtMatt also posted some results which were stutter free on his i7 2700K combined with 2x7950s.

I know that Metro 2033 is a game that will use 8 threads, and as with the 8320/50s, running the core unpark on Windows 7 had a very definite effect on performance. On Windows 8 out of the box the game ran fine on the i7, again in line with 8320/50s as far as I can see.
Click to expand...

Metro 2033's an oldish game, I know it's GPU heavy, I'm not sure how efficiently it can dish out the threads (Because I think it came out a month before mainstream available Hexcores ; Thuban)

I'll give it a shot with my single 7970 and i5 4670K tonight, the i5 Sandy's weren't even out then, only Lynnfield.
 
BurntProc said:
Another option is disabling a few cores. It will take a lot of strain away but obviously you won't be making best use of your gear
Click to expand...

I got 4.2ghz on my Asrock Extreme 3. It wasn't easy and I had to use the bus to get there. No multi whatsoever, just bus. I set it to 1.4v but the best the board could do before it blew up (bad cable) was around 1.23. This was easily monitored using CPUZ.

The VRMs need cooling. They are the culprit. As soon as they hit a given temp they drop the CPU to 1.7ghz until they have cooled down enough to carry on heating up. I did this -



I used an 80mm fan stuck down with some double sided foam. All it did was keep the air moving over the north bridge and more importantly, the VRMs. Then I was able to get 4.2ghz but I needed a H100 to do it. The H60 simply wasn't good enough.

I'll be putting this to the test again when I set up Nicola (my lady's) PC. I've only got 4+2 to work with, but I'll squeeze the bugger as hard as I can.
 
If disabling the core parking isnt fruitful i will put a H80 on (currently have the H50 on the 8350) and put a 140mm side fan on to try and put some air over the VRM/northbridge.

Fingers crossed.
 
I think you might only be able to disable the cores in twos (though haven't tried yet, so don't take my word for it).

You could move your GPU to another slot and then get a pci movable fan to aim it at the heatsinks for more active cooling. Though given the lay out of the extreme 3, i imagine the best thing for VRM cooling would be to get one of those RAM coolers, I think you can mount it by having it hold on to the VRM sink and the first PCIex1 slot.
 
Lostmyrag said:
Im sorry man, im sowwwwy!

Hopefully the H80 will nail it. I wonder if the H50 was part of my problem to begin with?!
Click to expand...

A H60, which has the same rad yet a massively superior pump and block made my CPU overheat at 4.2ghz. It was OK in general stuff, but Crysis 3 swamp made it start to choke to 1.7ghz. Took me a while to figure it out !

It then happened more and more as the game went on (as it gets more demanding later on, especially in the buggy open world part)

I bought a H100, problem gone. Couldn't get any more OC wise though due to the VRMs but 4.2 was fine and dandy.
 
I will try the core unparking app to see what is happening in my win7 install. I have some more results now that I switched to a seasonic 860w platinum psu. No more random shutdowns, gpu and CPU simultaneous overclocks are a breeze. Probably the most astonishing thing is the new psu seems to have massively reduced the voltage I put through the CPU to achieve the same clocks (eg. 4.85Ghz now at 1.46v vs 1.48 previously).

Will post results later.
 
Couple of updated scores.

Firestrike Extreme preset - 8320 @ 5GHz 7990 @ 1100 core, 1575 mem:


Firestrike normal with a small bump to the 7990 at 1120 core. I think win8 would help the physics score here:


3DMark11 - 8320 @ 5GHz, 7990 at 1120 core, 1575 mem. Over 21,000 GPU score! The 7990 can give more I feel as max temps are 70C but I am limited by the voltage lock to 1.3V and I can't find a modded bios for it:


BF4 should be playable tomorrow so hopefully can see how the system copes with it.
 
After running fine since the weekend, my chip is struggling at 4.6ghz. I suspect the psu is struggling a tad. I plugged in my new headphones today - the impedance is only 55ohms but they are powered through the pcie socket. My other thought is that the FSB is at its limit with the new expansion cards installed.

Has anybody had similar problems? Adding more volts to cpu / cpu-nb doesn't seem to help.

I've dropped back down to 4.5 for now - try to get some gaming in and then test at the weekend!
 
BurntProc said:
After running fine since the weekend, my chip is struggling at 4.6ghz. I suspect the psu is struggling a tad. I plugged in my new headphones today - the impedance is only 55ohms but they are powered through the pcie socket. My other thought is that the FSB is at its limit with the new expansion cards installed.

Has anybody had similar problems? Adding more volts to cpu / cpu-nb doesn't seem to help.

I've dropped back down to 4.5 for now - try to get some gaming in and then test at the weekend!
Click to expand...

Man it sounds like you totally lost the lottery with your CPU :(
 
Yeah I think a quality PSU will make some difference as I think alex has tested today. I have a similar experience but I'm putting that down to the GPU drivers I had, checking the logs they have gone since I updated to a newer beta driver. I was also pumping near 1.5v for no reason when getting to 4.8Ghz and benching so got some fsb testing to do!
 
I think the chip is pretty decent, just I'm too noob to know the best way to tweak :P It just needs more time. I'm sure if I cranked the vcore and mult up it'd be easier to get it stable - I just prefer the fsb and don't want the mult at a non-rounded number!
 
BurntProc said:
I think the chip is pretty decent, just I'm too noob to know the best way to tweak :P It just needs more time. I'm sure if I cranked the vcore and mult up it'd be easier to get it stable - I just prefer the fsb and don't want the mult at a non-rounded number!
Click to expand...

Are you manually setting your NB and HT link frequencies? If so, what are you setting at?
 
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