• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

Potential monster clocker - not enough cooling, GRRRR!!!

Davedree said:
Thanks humbug that's why I bought it and thought take a chance on it. A lot of people turn their nose up at power color. Yeah 1.25 for that is very high. But did you find trixx or afterburner won't alter the voltage. I had to use power colors power up tuner. Be interesting to how much of a gap there is between mine and yours, enjoy it and look forward to your results
Click to expand...

Yeah, i had a Powercolor GPU back in 2002, they have been around a while so they must be doing something right, and i tell you what, its a lot more stable than that expensive Gigabyte 7870 i also own, that will not overclock much at all without a handful of volts, and to add to that it can't handle a lot of volts, show it 1.27v which you need for anything over 1200Mhz and 9 time out of 10 it will just BSOD. its a bit of a pig, compared to this one there is no contest.

Anyway, i may have found something interesting, MSI AB will not Unlock the volts, Trixx has the voltage slider available but does nothing.
Power up tuner will adjust the volts, i took it down as far as 1.100v @ 1100 / 1600 (150mv less than default) which is great..... and i got the boost clock jumping! but whats more, there almost looks like there is a correlation between the GPU dropping to base clock and a 150mv spike. i opened the same GPU-Z log in 2 separate windows to illustrate it, see pic.

What do you make of that?

I could sort that spike by ajusting the Board Power Line as you do with this: as you say. but Power up tuner has no Board Power Line! and Trixx / MSI AB do nothing!!!!!! lol



Gregster said:
Very impressive and even beating a 7970 in the Valley thread. Get it under water (easier than those fiddly Arctic coolers) and let it stretch its legs :)
Click to expand...


Why thank you :)


Tonester0011 said:
No fullcover blocks for the Myst card :(
Also pretty expensive, unless you can source second hand parts buying new for all your bits adds up...quickly :D

If you've got the money and the case, seriously consider WCin though Humbug, most things go for peanuts on the MM.

Edit: Does the 7870 LE even have FC blocks?
Click to expand...

Don't know, but don't think so, i think they are different PCB's, not a 7870 PCB and not a 7950, but something in between.
 
Last edited:
Exactly the same for me too including identical throttling. Trixx all options there but voltage doesnt change. So i use powertuner for voltage and clocks an ati ccc overdrive to turn the power limit upto 20% as a fix for now. These boost bios's are shockingly overvolted for a 925/950 clock. Shame on amd!!
 
Right, i craked it, yay.... :D

MSI AB 3 BETA will adjust the volts, but only if you check box (force constant voltage) if you don't set that it will, like Trixx, do nothing to the volts.

Thanks to LtMatt i also tried setting +20% in CCC and used Power Up Tuner to set the clocks, and yes, thank you LtMatt that work to :)

Ok, so i initially set 1.150v, i got as high at 1175 / 1600 before the driver let go (as it should with an unstable overclock,) so i turned the volts up 20mv to 1.170v and it passed, the GPU got to 68c (8c cooler) and the VRM's to 63c (some 12c cooler) i ran 3 more runs of it without problem.

As it turns out i do have the dodgy 28 BIOS, found out last night how to tell, i have highlighted it in the screenshot.
Powercolor know about it and are handing out a 32 BIOS to complainants to fix it, (which according to [H] forums users: it does) i have it on my computer and was giving real thought to updating it, but i'm not sure i want to take the risk now as this is a very easy fix.

Anyway, i think 1175 / 1600 will be my 24/7 clocks, even if i have to set another 10mv to get it stable for 24/7. Time will tell.

Thanks for all your help guys :)

In the Vally screenshot it says that i have set the memory at 1732Mhz, thats wrong, the new MSI OSD is reading that wrong, its actually 1600Mhz.



 
Last edited:
not bad, could only get mines stable at 1175 on the core when running unigine without touching the voltages and memory although it artifacts when gaming :confused:
i wonder if case cooling has some effect on it since im only using a merc alpha with 2x120mm intakes and 1x120mm exhaust.
 
Cough cough humbug post 22 ;-) well done getting ab to work, a question though when forcing voltage does that not mean your idle voltage will still be max voltage?
 
I might do that ^^^

kmetek said:
you have GELID and ARTIC COOLING...2 coolers around 30-35 pounds.
Click to expand...

If they fit i will, its not a conventional PCB.

Davedree said:
Cough cough humbug post 22 ;-) well done getting ab to work, a question though when forcing voltage does that not mean your idle voltage will still be max voltage?
Click to expand...

oops... sorry, you did tell me about CCC :o

Yes it does, so yours and LtMatt's CCC suggestion is the one to use.

What volts are you running to get 1175?
 
I think its 1.16 in gpuz. Only needs 1.06 to 1100mhz then gets juicy after that. Wont do 1200 or above no matter what voltage, it just artifacts. Im not moaning though it came with 2 games and selling my 6950 1536 shaders will fetch good money for bitcoiners to help fund this gpu. Wonder if our pcbs are similar?
 
these are quite nice cards for the current offer you talk about basically like a 7930 really and oc well.

even better is for the price you sell the games and you get a 7950 performance for 135 quid :eek:.
 
humbug said:
Yes but MSI AB does nothing when using it to adjust the volts.
Click to expand...

You only need AB to apply the method, you don't have to use AB after that, you can use it on any tool that has a power/limit slider.

You can use CCC for up to +50% and Power Up Tuner like you are just now.:)

On another note about lowering the voltage through AB:

Matt gave me a copy of his Riva tuner AB settings(for FPS capping) a while back now, and his lower Asic 7970 took over my high Asic 70 voltage within AB, I was left with his feeble lower stock voltage until I removed his AB settings.

You could maybe copy your older 7870 AB settings(I imagine you have to make a profile of some sort within Riva tuner(and you may have to use an older version of AB) as they both come under a 7870?
 
Last edited:
tommybhoy said:
You only need AB to apply the method, you don't have to use AB after that, you can use it on any tool that has a power/limit slider.

You can use CCC for up to +50% and Power Up Tuner like you are just now.:)
Click to expand...

Thanks, it doesn't happen at even +10.

I just use Power Up Tuner to under volt it, default volts are 1.25v, way to high, its 100% stable @ 1200 / 1600 with just 1.19v and no Boost spiking at all, its fantastic and with just +10 in CCC

Its even cooler @ 1200 / 1600 @ 1.19v vs 975 / 1500 @ Default 1.25v.

The problem with these is the early BIOS had the volts set far to high, so it was hitting the TDP and throttling.

The new BIOS fixes that by setting much lower volts.
 
You must log in or register to reply here.
Back
Top Bottom