AMD Radeon 7950 / 7970 Overclocking club

yasamoka · 2013-04-01T09:31:48+00:00

Post here your system spec, HD7950 / HD7970 overclocks, voltages, temperatures, if you have replaced the stock cooler, any further suggestions for OCing. Ben...

edhunter

I've tried to overclock to 1150mhz and it keeps crashing...even when i up the voltage to 1.3v wit Trixx...any idea?

yasamoka

edhunter wroteI've tried to overclock to 1150mhz and it keeps crashing...even when i up the voltage to 1.3v wit Trixx...any idea?

1) What are you stress testing with?
2) Check your VRM temps.
3) What is your GPU temp?

If all of these check out, then you might want to disable ULPS. Either via Atiman (a tool that disables ULPS comes bundled with it) or use MSI Afterburner 3 Beta and go to settings and disable ULPS there.

edhunter

1) Unigine heaven
2) Well at 1150/1.3v they crash when the temp is around 42 for vrm and
3) 50 for gpu

yasamoka

You have very low temps, which is very weird. Is the fan on auto, manual, or 100%?

High voltages can crash a card which does not heat up very much. One might find he is not stable when the card crosses 70C, let's say, so he can up the voltage and it would be stable at a bit higher than 70C. This is due to transistor leakages which get reduced by higher voltages but then that increases temperatures even more, increasing leakage again.

What is your last stable OC? Did you try stability of 1150 at lower volts?

edhunter

what software should i use? I think there is also a conflict of that: msi,ccc, trixx and then monitors...gpu-z, hwmonitor...

yasamoka

Disable CCC. Can you set voltages via MSI AB? If so, you might want to use MSI AB. If not, you might want to stick to Trixx and close MSI AB.

For monitoring, it doesn't really matter. They shouldn't conflict AFAIK.

edhunter

I don't think I am able to effect any voltage change, in the HWmonitor or gpu-z its always fluctuating below 1.125 even.

Once I up the core clock above 1100 it freezes after 10 sec of benching and gives an error that AMD driver has stop working and recovered and the temp doesn't go above 50 c.

yasamoka

Oh so you aren't yet stable at 1100MHz even?

First of all, test for the highest stable overclock at stock volts; then we'll start from there.

Test using a bottom-up strategy, it's better.

edhunter

1100 mhz was fine with stock volts. Above that it started freezing even when i increased the voltage from trixx or msi AB. Though after googling a bit, some had the same problem with Trixx version 4.6.0 - not being able to change volts. so 4.4.0b did the trick!

so 1200/1500 at 1.2v

yasamoka

Oh yeah! Saw some with that problem and they went with a newer version! Seems they modified the power circuitry in the newer cards!

AAAND DAMN AWESOME! Bench a bit more for this OC to check for stability, it's GOLD!

Use OCCT if you like, but start with the lower clocks and volts (make sure), as it's more intensive than anything else.

Good luck!

EDIT: BTW what was your stock voltage?

edhunter

What do you mean by occt?

yasamoka

edhunter wroteWhat do you mean by occt?

It's a stress test application. OverClock Checking Tool.

Here is what my 7970 scores @1125/1375 stock volts (I think I got a bit higher before):

Zahix

edhunter wrote1100 mhz was fine with stock volts. Above that it started freezing even when i increased the voltage from trixx or msi AB. Though after googling a bit, some had the same problem with Trixx version 4.6.0 - not being able to change volts. so 4.4.0b did the trick!

so 1200/1500 at 1.2v
http://i.imgur.com/ErMlnrJ.png?1

Max temp at that OC ? also did you watch carefully for any artifacts?

edhunter

max temp around 55. and define artifact please.

Zahix

edhunter wrotemax temp around 55. and define artifact please.

http://en.wikipedia.org/wiki/Visual_artifact

It is basically anything you see weird on your image.

edhunter

nop nothing weird.

yasamoka

Use OCCT to be on the safe side. But start low and work upwards since it can be pretty intensive.

chassis

Khaled

chassis wrote'

Thank you for editing that out .. that was a HORRIBLE idea ..

chassis

haha...that was a joke posted by my friend :p

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