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[Official] AMD HD 69xx Owners Club - Page 329

post #3281 of 3890
Quote:
Originally Posted by Mergatroid View Post

Sounds like a simple faulty component. It does sound like a classic psu issue. However, I could also see the card causing this kind of fault too. This is not a design flaw that I've heard of, but there's lots of forums out there so someone else may have experienced it.

Thanks for the feedback. It would be very helpful for me to understand if it's simply a faulty part or a bug.
post #3282 of 3890
All of you guys with flashed HD6950's with HD6970 bios are toasting your memory with the overvolts to the memory.

Switch to an unlocked modified HD6950 bios smile.gif

http://www.overclock.net/t/923129/hd-6950-810-1250-mhz-shader-unlock-1-175v-gpu-1620-2500-ccc-limits

that said, I have a card unlocked in this method and my limits for OC in MSI afterburner were 840 on the core. I had to edit the .cfg file in afterburner to get it to open to further overclocks. Can only get 935mhz stable at 1.175v. Tried 950 at 1.2v, crashed after a few loops of 3dmark 11.

Still good enough for P6103 3dmark11 performance preset biggrin.gif
Edited by d3v0 - 2/9/12 at 11:26pm
post #3283 of 3890
Quote:
Originally Posted by d3v0 View Post

All of you guys with flashed HD6950's with HD6970 bios are toasting your memory with the overvolts to the memory.
Switch to an unlocked modified HD6950 bios smile.gif
http://www.overclock.net/t/923129/hd-6950-810-1250-mhz-shader-unlock-1-175v-gpu-1620-2500-ccc-limits
that said, I have a card unlocked in this method and my limits for OC in MSI afterburner were 840 on the core. I had to edit the .cfg file in afterburner to get it to open to further overclocks. Can only get 935mhz stable at 1.175v. Tried 950 at 1.2v, crashed after a few loops of 3dmark 11.
Still good enough for P6103 3dmark11 performance preset biggrin.gif

But isn't it the same memory? If so, how would it be toasting it?
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post #3284 of 3890
Quote:
If you flash a HD 6970 BIOS, it overvolts the GPU, and runs the memory more aggressively. The memory is what causes the problems. Some people have physically damaged memory with the 6970 BIOS. There's no fix for that besides getting a new card. You can always flash it back to 6950, but if you screwed up the memory, that won't fix it.

http://hardforum.com/showpost.php?p=1037091153&postcount=6

is this not a trend with cards being bricked and needing RMA way too early when flashed from 6950 to 6970 bios?
post #3285 of 3890
Quote:
Originally Posted by d3v0 View Post

All of you guys with flashed HD6950's with HD6970 bios are toasting your memory with the overvolts to the memory.
Switch to an unlocked modified HD6950 bios smile.gif
http://www.overclock.net/t/923129/hd-6950-810-1250-mhz-shader-unlock-1-175v-gpu-1620-2500-ccc-limits
that said, I have a card unlocked in this method and my limits for OC in MSI afterburner were 840 on the core. I had to edit the .cfg file in afterburner to get it to open to further overclocks. Can only get 935mhz stable at 1.175v. Tried 950 at 1.2v, crashed after a few loops of 3dmark 11.
Still good enough for P6103 3dmark11 performance preset biggrin.gif

No, we aren't. There are literally hundreds of us that have had no problems whatsoever.

If you're just refering to increasing the voltage, well people do that when they overclock. Even people who don't flash using the HD6970 BIOS but still overclock will increase the memory voltage for a faster overclock. If the voltage is increased by using the 6970 flash, or increased using a program such as Afterburner, in the end it makes no difference. In both cases the voltage will be increased.

Of course, it's a well known fact that increasing voltage reduces the life expectancy of the chips. Having said that, the voltage increase from the 6970 flash is minor compared to some of the voltage increases some people do for a straight overclock. This is true of ANY chip, even CPUs. You have a lot of rep, you're on ocn, which part of overclocking, increasing voltage and life expectancy is it you think we don't understand?

People overclock the memory on these cards all the time, and this is no different. Anyone who's card died likely would have had the card die anyway even if they had of just overclocked, increased the voltage and not flashed with the 6970 BIOS..

Lastly, I have to ask if you are an engineer? Because, frankly, the only proof I would accept is from an engineer with experience in this field telling us why the 6970 flash voltage increase is any worse than a regular overclock voltage increase.
Quote:
Originally Posted by nvidiaftw12 View Post

But isn't it the same memory? If so, how would it be toasting it?

Some cards use the same memory and some don't. The only way to know is to remove the cooler and check the numbers on the memory. Even if it is "6950 memory" that doesn't mean the card will be damaged. Lots of people increase voltage to achieve a higher stable overclock, and this is no different.

This is an old argument, and in my opinion, an invalid one. Any voltage increase could kill any card. It's the luck of the draw, and anyone overclocking knows that.
Quote:
Originally Posted by d3v0 View Post

Quote:
If you flash a HD 6970 BIOS, it overvolts the GPU, and runs the memory more aggressively. The memory is what causes the problems. Some people have physically damaged memory with the 6970 BIOS. There's no fix for that besides getting a new card. You can always flash it back to 6950, but if you screwed up the memory, that won't fix it.
http://hardforum.com/showpost.php?p=1037091153&postcount=6
is this not a trend with cards being bricked and needing RMA way too early when flashed from 6950 to 6970 bios?

No, it is unlikely a trend caused by the flash. It COULD be caused by overvolting, and it could also indicate a cards that would have died anyway with ANY voltage increase. As well, some of these people may not only have flashed, but also overvolted on top of the flash. This would cause even more stress on the chips than just flashing them to the 6970 BIOS.

I can tell you this. I have a 6950 and a 6970, and with the flash my 6950 behaves exactly the same as the 6970, temps and all.

For every person you can find with a damaged card I bet I could find 100 with a flashed card working fine, and I bet the ratio would be the same for anyone overclocking (that is to say, overclockers are at a greater risk of their cards dieing, and I don't think the flash is causing a higher failure rate).
Edited by Mergatroid - 2/10/12 at 5:47pm
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post #3286 of 3890
My thought is the rationale was the increased clocks and voltage to the different memory chips have have affected its longevity. I dont really have empirical evidence, just noting what I recalled from my initial research of flashing my own card.

that said; mine is flashed to a modded HD6950 bios with unlocked shaders, 810mhz core and 1.175v out of the box. Goes up to 935/1325 perfectly stable and thats good enough for me smile.gif even outperforms most 6970s I see on review sites test benches (mild OC and faster cpu, probably).

Edit: easy tiger! Big post, very informative. I have vmodded multiple cards and understand how it works - though I am no engineer. What I had understood was that the memory in particular is sensitive to voltage increases specifically to the memory (from the 6970 bios) which has hurt their longevity - thus causing earlier RMAs.
Edited by d3v0 - 2/10/12 at 6:29pm
post #3287 of 3890
Gtx 570 2.5GB, Msi 6970 lightning, gtx 560 sli, gtx 560 ti 448, gtx 560 ti 2GB or 6870 crossfire

What should I get.?
post #3288 of 3890
Well, your post was a little inflammatory. "All of you guys with flashed HD6950's with HD6970 bios are toasting your memory with the overvolts to the memory."

That's quite the statement with no evidence to back it up.

As I said, even people who did not flash their HD6950 with a HD6970 BIOS still overvolt their card to achieve a higher overclock. I don't see any difference between the flash and a regular overclock with increased voltages. The end result is the same, higher voltage. Some people have also brought up the "aggressive timing" idea, but not a single one could explain how tighter clock signals could damage a card more than overvolting it for higher overclocks. Even mobo overclocking use faster clocks and higher voltages. Unless they are taken to the extreme and run that way at length they are not just going to kill the chip, memory or board unless something was borderline to begin with. Reduced life expectancy is something you have to put up with when overvolting. Even then, it's still the luck of the draw. You may never have a problem, or your board/memory or cpu could bite the big one. That's the risk we take.

There is a thread here on ocn regarding this exact subject. I'm not the only one who has called people on this. If someone could show that people using the HD6970 flash have a higher failure rate than people who overclock and overvolt then I might be convinced, but so far no one who has made these claims has come up with any evidence at all. Nothing.

At this point, I would be willing to bet that those cards that died and had a 6970 flash would have died with overclocking + overvolting anyway.

We know overvolting will reduce life expectancy, but IMO the 6970 flash creates a fairly minor overvolt. Some people have successfully done a 6970 flash + overvolt/overclock and are still not having any problems.

I'm not saying overvolting doesn't cause any harm, I'm saying the 6970 flash is no worse than overclocking and overvolting without the flash.
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post #3289 of 3890
Not this again! For a moment I thought I had time traveled back to the past.
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post #3290 of 3890
Thread Starter 

Sorry for the long wait. expect a OP update within 3 days.

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