R7970-2PMD3GD5 Overclocking

[ectraz]

Hey guys just got myself one of these cards "R7970-2PMD3GD5" performing lovely and clocks a little but seems to be locked down i can push the voltage to 3.0 but the clock speeds seem to be limited.. the fans are not even kicking in cards running cold and going to slap a water block on it in the next few weeks.

is there a way of takeing the restrictions off this card. could it be flashed with
R7970-2PMD3GD5 OC firmware?


Thanks

 

[Nickolp1974]

.??? Pushed volts to 3.0, is it on fire??

 

[pgi947]

All the OC bios will offer is higher stock clocks.

Sounds like you need to 'unlock' afterburners clocks and enable voltage control and monitoring.

Presume 3.0v is a typo? As Nickolp pointed out, 3v = fire

 

[Meaker]

Yeah, 3.0v has not been core voltage for chips since the 486 series lol.

 

[borley]

Maybe you mean 1.3v?
regards

 

[ectraz]

I said i can push it to 3.0v thats the option it gives me. i havent.

im running 1.25v @ 1200Mhz Core 1625 Mem seems stable.

i found a bios for the card in the end unlocked everything

 

[ectraz]

not convinved its the best bios in the world, going to have a browse tonight see if i can find something a little better, bench scores on it seem to have droped arround 1000 marks even compared to stock clocks.

 

[chipachap]

not convinved its the best bios in the world, going to have a browse tonight see if i can find something a little better, bench scores on it seem to have droped arround 1000 marks even compared to stock clocks.

Whatever you do don't go over 1.3v. It could be throttling due to temps or your memory clock is too high, it's knows to drop scores after a certain speed.

 

[ectraz]

Relisticly what should i be able to push this card too??

im going to slap it into my water cooling loop in a few weeks so after a before and after scenario

 

[ectraz]

Whatever you do don't go over 1.3v. It could be throttling due to temps or your memory clock is too high, it's knows to drop scores after a certain speed.

I tryed droping to stock clocks. was still geting worse results then original BIOS.

Also what do you mean by it knows to drop scores after certain speeds?

im getting 55fps on first test of 3dMark 11 was getting 41 - 43 before. so there is frame increase but not a bench increase..

 

[LtMatt]

Hey guys just got myself one of these cards "R7970-2PMD3GD5" performing lovely and clocks a little but seems to be locked down i can push the voltage to 3.0 but the clock speeds seem to be limited.. the fans are not even kicking in cards running cold and going to slap a water block on it in the next few weeks.

is there a way of takeing the restrictions off this card. could it be flashed with
R7970-2PMD3GD5 OC firmware?


Thanks

I have the OC version of your card.

First you need to tell us what the Asic and default volts of your card are.

Whatever your default volts are, add +0.125mv onto that. That is your limit, exceed that and over current protection will kick in. Your screen will go black and your pc will be unresponsive until you restart.

It might be worth switching bios if your current bios and card have a low default voltage. If you get a higher basic default voltage then that will give you more room to overclock in. However it will raise temps etc.

I manage to get 1200 core off of as little as 1.175 volts. (stock 7970 voltage asic dependent)

My asic is 78.9 so my stock volts are at 1.112. I can go up to about 1125 core before i need to start adding more voltage to make the core stable.

At 1.112 + 0.124 puts my max voltage possible at 1.234 before OCP kicks in. However you need to give a bit of leeway, so i never push my voltage higher than 1.225 as i don't want OCP kicking in. I can make OCP kick in by running 1.2volts and 1200Core on OCCT GPU.

 

[ectraz]

ok will get the details when i get home from work see what i can achive..

as far as im aware the R7970-2PMD3GD5 and R7970-2PMD3GD5/OC are the same just different astetics and bios?

 

[LtMatt]

ok will get the details when i get home from work see what i can achive..

as far as im aware the R7970-2PMD3GD5 and R7970-2PMD3GD5/OC are the same just different astetics and bios?

Negatory. The latter has a higher core clock, to the tune of 1040.