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ATI Hd 7950/7970 bios mod thread - Page 3

post #21 of 1284
It can run at 1.225V just fine, but what's the risk of blowing the power phases? I heard these GPUs can run fine up to 1.3V

I've managed to hit 1150MHz Core, and will try for 1200MHz later on in 3DMark11 and will let you know.

And is it possible to just increase the memory voltage by just a fraction to try and get 1400MHz stable?
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post #22 of 1284
Thread Starter 
Quote:
Originally Posted by Atomfix View Post

It can run at 1.225V just fine, but what's the risk of blowing the power phases? I heard these GPUs can run fine up to 1.3V

I've managed to hit 1150MHz Core, and will try for 1200MHz later on in 3DMark11 and will let you know.

And is it possible to just increase the memory voltage by just a fraction to try and get 1400MHz stable?
Yes they can run a little higher with the right power phases, ex its like comparing a 6+2 phase motherboard to an 8+2 phase board. Which is more likely to fail with an overclock? Which stands a higher chance of lasting longer under full load, while overclocked or not? 50mhz on the memory is about the sames as 10 or 20mhz core equivalent. You gained 150mhz core. I will look into memory later this weekend or some time during the week since so many are willing to try. Will have to do testing as well. But i have to thank you any ways i used you as a test subject. Lol. During unlocking your card i did not reset or curve the voltage table. Just added a little higher at the end and figured lets try not to match but offset with a higher number at the end at the end of the scale on top thats the number i set higher by itself and it unlocked your voltage to the higher number. So now future profiles made will be smarter and curve not so drastic and i know right were to find voltage unlock. I just wonder if this is going to work for a boost card. I have one to edit for someone so i will find out soon if they let me know.
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post #23 of 1284
Fair enough, I'll have to swap over my Sempron 190 back to my Phenom 1055T, clock that back to 4.2GHz and try for 1200MHz on my 7950 @ 1.225V and bench it on 3DMark11 and compare it with mylast score biggrin.gif
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post #24 of 1284
Quote:
Originally Posted by Atomfix View Post

It can run at 1.225V just fine, but what's the risk of blowing the power phases? I heard these GPUs can run fine up to 1.3V

I've managed to hit 1150MHz Core, and will try for 1200MHz later on in 3DMark11 and will let you know.

And is it possible to just increase the memory voltage by just a fraction to try and get 1400MHz stable?

I got a Spapphire Vapor-X which i raised the memory voltage on from 1,5 volt to 1,6 volt and right away i raised the memory clock to 1700 mhz. I have not tried higher yet, but until now 0 artifacts or anything when benchning or gaming. The maksimum i have tried on the core is 1200 mhz which is perfectly stable at around 1,285 volt before v-drop. For daily use i run 1130 mhz core with 1,231 volt which gives me around 1,160 volt after v-drop. I only have a 25" monitor with maks res. 1920*1080 so with my 2500k at 4,7ghz 24/7 i got no use for higher clocks atm.
post #25 of 1284
So I've tried 1.255V @ 1165MHz Core and 1350MHz Memory @ 40% Power Limit and the driver keeps crashing.

Tried to benchmark on 3DMark11
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post #26 of 1284
Quote:
Originally Posted by kahboom View Post

Is your target voltage with load or no load when you measured and using no power tune. When profile is set for your new stock clock make sure voltage is what you need because profile will be made for it. Also what limits do you want for core and ram? Power tune will be unlocked to50% I get off work in a few hours. So i have a few others to edit as well. What max core where you looking for?

That voltage is with no load or Powertune. With 1.219v, the voltage drops to 1.183v under heavy load, when it is folding. Maybe just round up to 1.22v for core.

As for limits, is it possible to set a Max OC of 1350MHz core and 1800MHz for the ram. I will be putting a water block on the card at one point.

Thanks again!
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post #27 of 1284
Quote:
Originally Posted by kahboom View Post


post your bios and i will take a look. Yes after burner is locked. I have been looking for and uncapped lightning bios the ln2 one but cant find it. I wanted to see how they prevented the card from powering down in the sleep state for the power phases from reviews i have read, this would be nice to see how it would effect a normal card.

I will upload all 6 bios to you tonight. The reason for 6 is I have 3 different asic (1.05, 1.112, 1.175) each with their own ln2 bios.

These are launch day 7970 lightnings so are most likely the most "unlocked". A bit of info for you: ln2 bios does indeed keep all power stages on the entire time but this is the only "unlocked" part enabled for end users unless you have the newest AB MOA edition. Afterburner is completely locked down with 1.35v max/20% pt.

Also, the ln2 bios is is slower at the same clock speeds. There must be slower timings in both the GPU and mem, this is why I want the stock bios to obtain 50% pt.

Art money voltage hack works on stock bios, so the voltage limit is easily passed which leads me to believe pt can be unlocked as well. But the issue of using CCC/trixx comes into play.

Maybe using the /xcl method with CCC/trixx would work.m.
     
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post #28 of 1284
Would you like a 7950 boost vapor-x bios?
    
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post #29 of 1284
Quote:
Originally Posted by kahboom View Post

you have to correct an edited checksum too not brick these cards on the xfx. Voltage can be raised to max on value can not be changed near the bottom of the hex in another section after burner finds it thats way it does not work with the mod but its in another section i did not list, or show a picture of allowing a cap in the Asic if you will the setting before last i set near his asic value and raised to 1.150. So his card would run between that and the previous setting. Changed last setting to 1.255v which is the new limit. Since the power phase is weak i did not raise fully. Unlocked power tune to 50%. He has run up to 1.225v but did not go higher due to heat. To avoid conflict correct checksum value back to stock value and it works 100% of the time. I will revisit his bios later on and perform more tweaks i havw yet to list, just havent had the time. As far as vrm in his bios its just not there most likely due to the type of power phase used.

Yes, I always update checksum (16 bit) by editing the bottom of the bios FF FF or 00 00 00 etc to match the original checksum.

Otherwise atiflash didn't let me flash (as at the time I didn't know about the -f option).

According to atiflash- they use a 16 bit checksum.

BTW, The voltage modding program from techpowerup does not correct checksum, I let the author know.

What kind of vdroop y'all getting with occt 4.4.0 dx11 360x360 + 480x480 shaders 5 error checking on?
My 1.18v drops to 1.10v ... 22-24 amps 12v in!
Edited by robnitro - 6/4/13 at 2:24pm
post #30 of 1284
Quote:
Originally Posted by robnitro View Post

Yes, I always update checksum (16 bit) by editing the bottom of the bios FF FF or 00 00 00 etc to match the original checksum.

Otherwise atiflash didn't let me flash (as at the time I didn't know about the -f option).

According to atiflash- they use a 16 bit checksum.

BTW, The voltage modding program from techpowerup does not correct checksum, I let the author know.

What kind of vdroop y'all getting with occt 4.4.0 dx11 360x360 + 480x480 shaders 5 error checking on?
My 1.18v drops to 1.10v ... 22-24 amps 12v in!


Which voltage mod from tpu are you talking about? just curious.

I have v droop of .08,.07 and .04 for my three cards.
     
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