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New Bios update for gigabyte HD7950 ! - Page 72

post #711 of 1324
robnitro I can not thank you enough for your effort. I tested your BIOS on rev2 board (6+8) which I am using for mining.
Original BIOS had the voltage - 1.25, F43 - 1.09 and in both of them it could not be changed so I tried yours.
GPU-z is showing me voltage od 1.25 but my impression is that maybe the reading is wrong since with your BIOS max stable clock is 1130MHz while I could clock the original BIOS with the same voltage to 1200MHz. Don't get me wrong, I am perfectly satisfied even with 1100MHz but would like to run it lower than the 1.09v that F43 has to offer.
Today is a bit chilly in my area so I can't be 100% certain but I belive that the voltages are indeed lower. It is impossible for me to change voltage with AB, even though I unlocked voltage control inside AB.


So the questions are, is my GPU-z reading wrong, what is the voltage that I am running with the setting in the picture above and finally is it possible to lower the voltage even more?

Thank you once again. thumb.gif
post #712 of 1324
Quote:
Originally Posted by Belial View Post

So... can you change the new gigabyte 7950s so that they support voltage? What about memory voltage? Do the new gigabytes use hynix or elpida, and do they have VRM temp sensors?

You can just rma if your not happy. And if the next card don't mine as you expect rma again smile.gif
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post #713 of 1324
Sorry I'm getting confused here. I do not have a gigabyte 7950. I RMA my sapphire 7950 Boost 3L for a faulty heatsink, but it was a bad card and I'm looking to replace it with a good card (hynix ram, core voltage, memory voltage, and I'd like a VRM temp sensor but not totally necessary, and a better cooler would be cool too but I know the dual-x is a good cooler).

I'm considering to get my 7950 exchanged for a different model, instead of replaced. If you can possibly mod the BIOS or something on the gigabyte 7950s, then I'll get one. If you cannot get around the new voltage lock, then I won't.

So it's very relevant to me - can you access voltage control on the new 7950s with a bios tweak of some kind? Is this with all GA 7950s, or just some of the new ones?
Quote:
Originally Posted by bigmac11 View Post

Quote:
Originally Posted by Belial View Post

So... can you change the new gigabyte 7950s so that they support voltage? What about memory voltage? Do the new gigabytes use hynix or elpida, and do they have VRM temp sensors?

You can just rma if your not happy. And if the next card don't mine as you expect rma again smile.gif
'

I do not RMA cards just because I was stupidly uninformed or because the card is poorly binned. I legitimately had a reason to RMA my Sapphire 7950 Dual-X Boost 3L. Furthermore, the card actually mined very well, slightly above where most cards perform at the same speed (although I attribute the extra ~30hash to better settings and a memory oc really). And I'm losing about $40 in downtime, so I have no intention to return cards if they underperform.

In fact, I seriously considered just living with the rattling heatsink, so I wouldn't have any downtime. But I went against profit, against a smart business choice... because that rattling heatsinks was really, really, really annoying, AND the card was poorly binned. I might have lived with the extremely loud rattling if it was binned well. Seriously, I could not hear youtube videos played on a normal sound level (ie talking level). That's how bad it was (on top of the fans at 100% blast).

Also, despite how bad the card is as a 7950 model, it's still a 7950, and it was a damn cheap 7950 at that, at only $279, so it wasn't a bad value at all at that price. However, I'd prefer to have a higher quality 7950 (within a reasonable price range). This card is to make money, and a card that I can adjust the memory voltage for a higher memory clock, will yield me ~$10/mo extra. So there's a very real and financial reason why I'm looking for a card with:

- core voltage
- memory voltage
- Hynix RAM

Now I don't want to pay $330 for a card, but $300, 310, for a card with these features, I'll pay for it.
Edited by Belial - 5/14/13 at 9:37pm
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post #714 of 1324
Bump. Seriously, does the gigabyte have a way around the voltage lock? Is the new Gigabytes,

* core and memory voltage at all possible with a tweak of any kind?
* hynix ram, not elpida
* VRM temp sensor
* any particular issues, ie vrm whine or anything?
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post #715 of 1324
revision 2 gb 7950 are voltage locked and i'm not an expert so i can't tell you wether or not the bios modifying is possible without breaking the card. The ram is hynix. There are no VRM sensors. I don't know any particular issues. May be the general problem for these cards(rev.2) is the locked voltage. Also there are a lot reports in the net about the lower asics quality for all gb 7950 wf3 cards(not only rev.2). For example mine is 58.4%, but i can clock it satisfaying with more voltage - even can reach 1200 mhz for the core, but with ~1.3V.
post #716 of 1324
iglig, you can check by current load (vrm current in) and compare for same clock speeds at full powertune.

if you want lower version i can make one, just let me know clocks/volts for the states you need

i can also make the f43 run lower volts, but not higher
post #717 of 1324
btw, what i do is edit the table that converts asic % to volts.... but this table is only valid on f2,f43,f3,fz1... the fw fx fy dont use it

perhaps the newer fy fw fx cards use a diff way to lock volts...
post #718 of 1324
Quote:
Originally Posted by Belkov View Post

revision 2 gb 7950 are voltage locked and i'm not an expert so i can't tell you wether or not the bios modifying is possible without breaking the card. The ram is hynix. There are no VRM sensors. I don't know any particular issues. May be the general problem for these cards(rev.2) is the locked voltage. Also there are a lot reports in the net about the lower asics quality for all gb 7950 wf3 cards(not only rev.2). For example mine is 58.4%, but i can clock it satisfaying with more voltage - even can reach 1200 mhz for the core, but with ~1.3V.

Thanks a lot.

Since no one is saying anything I'm guessing you can't somehow tweak the BIOS on the voltage locked gigabytes ;/
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post #719 of 1324
see what iglig wrote.. my 1.188 v test bios fz1 doesnt oc as much as when he used stock 1.25, even though it still said 1.25... to compare a good way would be to run something that doesnt pt throttle, and compare vrm current in

edit: nevermind- you guys dont have vrm monitoring... thats also why you cant see actual voltage

So best way to compare is to check max overclock on my fz1 and compare to the stock bios you have
post #720 of 1324
Wow, tnank you for the offer! smile.gif

As far as your current mod of fz1 BIOS, I can conffirm that it runs stable on the card with ASIC 57,6%, 1100/1250MHz with powertune slider set to -10 for a full day. I've also checked HDMI support but it seams it is still broken for me, but hey, we still keep our original BIOSes, right. smile.gif
The only trouble is fz1's too aggressive fan curve, so myself and some friends @forum.benchmark.rs would definitely appreciate F43 that runs on, say... 1.038-ish for the full boost, so we could leave cards running for the whole season. Let's call it "F43 summer mod". biggrin.gif
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