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Is flashing to 6970 seriously a no-no? - Page 4

post #31 of 60
The GPUs for the 6950 come from the same wafers as the 6970. The only difference is the 6950 are not guaranteed to run 880 with all shaders.

It is a known fact that all chip manufacturers will downgrade chips once yields get good. The yields are crazy high for the 40nm because the processes is so old. Nearly all chips they make are of 6970 quality, but they need chips to sell 6950s. So they just relabel the chips and disable some of the shaders.

What you will find actually different is the 6970s have slightly beefier VRMs and the memory is rated higher.

Only 3 things that can kill your card: Too high voltage, VRMs burn out from load or too high temps for the chips.

Have a good PSU(dirty power increases VRM loads), keep your voltages within +10%, and keep your card cool.

Increasing the MHZ of your card doesn't hurt the chips directly, all it does is cause more power draw and create more heat.

Too fast of timings is like asking a person questions too fast, you may not get correct answers all the time, but you're not going to kill them. On the other hand, increasing voltage is like giving a person caffeine. You can only increase the dosage so high before something burns out and long term exposer to high amounts can cause damage over time.

The only flashable way to kill a 6950 is the higher 6970 memory voltages or messing up the firmware. It just so happens that reference cards are firmware compatible with the 6970, so it works in this case assuming you have a reference design. The current plausible rumor for why 6970 flashes are "killing" some cards is because the GDDR5 memory is very sensitive to voltage increases. 1.5v to 1.6v is less than 10% and I've never heard of a sub 10% voltage increase hurting anything ever. It is possible, but not likely.

More than likely, 6950s dying after 6970 flashes is probably because of just bad cards. I've read so many stories of just failed cards with no flashes. They just die after a few weeks, it happens and people with problems are more likely to post.

Personally, I think there are diminishing returns and I like that the stock 6950 voltages are lower. I can run my card with the 6950 mod at 915/1375 with 6950 voltages which results in a cooler/quieter running card by quite a bit and zero risk of hurting anything.

Personally, I would just stick with the 6950 mod, but make sure your card has a bios toggle switch incase of a bad flash. Some of the new revisions aren't reference and don't have the bios switch. A bad flash will brick your card.
post #32 of 60
Quote:
Originally Posted by PARTON View Post
How is +0.1v going to damage a chip?
You'll never know.
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post #33 of 60
Quote:
Originally Posted by tsm106 View Post
^^I'm not sure what you're saying? 6970 bios gets you to 950/1450 max oc in CCC while maintaining powerplay and ulps. AB doesn't support 6970 bios cuz the guy didn't write the support in there, but you can add it in if you know what to do. Also AB doesn't play nice with powertune, besides upls and pp.

Regardless, if your card can run 950/1450, 6970 bios is the best because you get to keep all the functionality of a regular 6970. Basically, if you don't want to muck around with AB, this is the way to go.
I'm saying that according to here, voltage adjustment on a 6950 with 6970 bios won't work even with the eula agreement.

http://forums.guru3d.com/showthread.php?t=336682

I'm saying that you could be running your 950/1450 with less than 1.175 volts. Regardless, you do what you want with your card. If I can run 6970 speeds with less volts on the core and memory, I'll choose that.
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post #34 of 60
Quote:
Originally Posted by tsm106 View Post
Read that guide, especially about the 0000, etc etc.

http://www.overclock.net/attachments...nly-oc.reg.txt

Here's my cfx reg file, remove the txt after you edit to fit your card config, ie. the 0000, etc etc part. Single cards should only be 0000 so you can just delete the 0001 half.
That little tool works great. Just put your cards defaults and new upper limits in and it and it writes the file and installs it. Also can make a backup before hand. It also has a removal button if things go wacky.

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post #35 of 60
Quote:
Originally Posted by homestyle View Post
I'm saying that according to here, voltage adjustment on a 6950 with 6970 bios won't work even with the eula agreement.

http://forums.guru3d.com/showthread.php?t=336682

I'm saying that you could be running your 950/1450 with less than 1.175 volts. Regardless, you do what you want with your card. If I can run 6970 speeds with less volts on the core and memory, I'll choose that.
http://forums.guru3d.com/showpost.ph...2&postcount=26


Quote:
Originally Posted by jameskelsey View Post
That little tool works great. Just put your cards defaults and new upper limits in and it and it writes the file and installs it. Also can make a backup before hand. It also has a removal button if things go wacky.
Yea, it works good so simple.
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post #36 of 60
Personally, I've had my MSI 6950 flashed to 6970 from day 1 with absolutely no problems. It's been more than a week now with it running at 950 core and 1450 memory and auto fan speeds with no problems whatsoever. I've played hours of Just Cause 2, Call of Duty Black Ops, Crysis 2, Red Faction Guerilla, etc. and I've done extensive tests using 3DMark 11 and Furmark. Card idles at 60C (auto fan) and loads at 70C (auto fan) with ambients at around 25C. I guess I got lucky?
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post #37 of 60
if you want a 6970, buy a 6970. Don't believe that because you flash the card it suddenly becomes a card that is more expensive to buy.
post #38 of 60
Quote:
Originally Posted by MADA$$ View Post
if you want a 6970, buy a 6970. Don't believe that because you flash the card it suddenly becomes a card that is more expensive to buy.
Actually it does lol.
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post #39 of 60
I have unlocked two Sapphires with the 6970 bios and the only bad thing is you can not raise voltage with afterburner, but other than that they have been fine at stock 6970 clocks and volts.
post #40 of 60
Quote:
Originally Posted by 636cc of fury View Post
I have unlocked two Sapphires with the 6970 bios and the only bad thing is you can not raise voltage with afterburner, but other than that they have been fine at stock 6970 clocks and volts.
You can raise the voltages after fiddling around in Afterburner CFG but only if you unlock the shaders via modded 6950 bios. That's the only reason why I didn't straight up flash to 6970. Afterburner lets you go all the way up to 1.3
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