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A warning to unlocking the 6950 2GB. - Page 6

post #51 of 90
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Quote:
Originally Posted by Senator View Post
You've had 9 hours since you made that commitment. Long phone call? I can cite the same TechPowerUp article you referenced showing the speed of a 6950 when fully unlocked and the PowerTune bumped +20%. At which point the 6950 is a 6970 according to their test results. Obviously I've not used all 2GB (that was a stupid insinuation), but what does that matter? You've obviously not either. The ram modules do not appear to be the same and I've already offered an alternative explanation to the ram differences between the 6950's and 6970's.

All I am asking for is proof. Otherwise this is a worthless scare thread and nothing more.
Scare thread? Many people have had their cards die before, I was just suggesting, and even then they show it's the same RAM. Even if it performs the same it doesn't change the fact the RAM timings are different, it's not little known. Also, Still at work? 24 hours shift? I have them, and have been on one.
    
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post #52 of 90
I don't know if the OP is right or not, but AMD has indeed released the HD6950 1GB with tighter memory timings, like Tom's Hardware reported:

Quote:
Of course, mid-week, a 1 GB card showed up, so I ran it through our complete benchmark suite.

In just about every case, the smaller frame buffer (and tighter memory timings) yields one or two more frames per second than the 2 GB model. It's not worth rehashing in a page full of charts. Literally, expect one or two more frames per second across the board.
Source.


They don't say if the memory is the same as the one used in the HD6970, but to me it doesn't make much sense to have the HD6950 2GB use the same memory type than the more expensive HD6970 and then release a cheaper HD6950 1GB with even better memory than the HD6970. This may indicate the OP is actually right.
 
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post #53 of 90
Quote:
Originally Posted by tpi2007 View Post
I don't know if the OP is right or not, but AMD has indeed released the HD6950 1GB with tighter memory timings, like Tom's Hardware reported:



Source.


They don't say if the memory is the same as the one used in the HD6970, but to me it doesn't make much sense to have the HD6950 2GB use the same memory type than the more expensive HD6970 and then release a cheaper HD6950 1GB with even better memory than the HD6970. This may indicate the OP is actually right.
Your absolutely right, it might. I would really like to know if it does. One could argue the same memory chips make sense if binning is taken into account along with the rather laughably locked shaders. Much like last years GTX 465 unlocking to a 470 in the first editions it was a question of cost. Appears it was cheaper for both AMD and NVidia to make one version of the PCB and then either disable shaders or bin the chips for GPU determination. Only in the second gen of that particular card and onwards does there appear to be a real difference.


Quote:
Originally Posted by Anthraxinsoup View Post
Scare thread? Many people have had their cards die before, I was just suggesting, and even then they show it's the same RAM. Even if it performs the same it doesn't change the fact the RAM timings are different, it's not little known. Also, Still at work? 24 hours shift? I have them, and have been on one.
Cool story. So your working a 24 hour shift and have had time to start this thread and post pictures of the card PCB's. Sweet job. Guess that means you'll be off in roughly 7 hours or less. Please feel free to bump the thread then with any evidence you may have. Otherwise, for all the people you posted about having card failures over at TPU, the majority have encountered no problems at all and are still going strong 5 months later. Feel free to link me evidence from anywhere to the contrary.

In addition, I've seen people on several forums (here, Tom's, TPU, etc) post about differences in the ram, but I've yet to see any real evidence. That's all I am asking for. Otherwise this is a scare thread and is pointless as it's common sense that unlocking anything poses a risk.

But hey thanks for reminding us of what we all already knew.
Edited by Senator - 5/12/11 at 7:30am
    
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post #54 of 90
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Quote:
Originally Posted by Senator View Post
Your absolutely right, it might. I would really like to know if it does. One could argue the same memory chips make sense if binning is taken into account along with the rather laughably locked shaders. Much like last years GTX 465 unlocking to a 470 in the first editions it was a question of cost. Appears it was cheaper for both AMD and NVidia to make one version of the PCB and then either disable shaders or bin the chips for GPU determination. Only in the second gen of that particular card and onwards does there appear to be a real difference.




Cool story. So your working a 24 hour shift and have had time to start this thread and post pictures of the card PCB's. Sweet job. Guess that means you'll be off in roughly 7 hours or less. Please feel free to bump the thread then with any evidence you may have. Otherwise, for all the people you posted about having card failures over at TPU, the majority have encountered no problems at all and are still going strong 5 months later. Feel free to link me evidence from anywhere to the contrary.

In addition, I've seen people on several forums (here, Tom's, TPU, etc) post about differences in the ram, but I've yet to see any real evidence. That's all I am asking for. Otherwise this is a scare thread and is pointless as it's common sense that unlocking anything poses a risk.

But hey thanks for reminding us of what we all already knew.
I am a doctor, I have a 24 hour shift, things get slow and I post thing son my Evo. When I get home I'll pull it up and post.
    
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post #55 of 90
Quote:
Originally Posted by Anthraxinsoup View Post
This has nothing to do with what I am saying. The timings kill it over time, I could careless is someone fails during the flash.
The success rate is 95+% which would show that there are no problems right now.

Someone failing during a flash is at the heart of the issue. All fail flashes don't produce fail boots. A fail flash could get you into windows and give you artifacts.

If you had people flash a locked shader 6950 bios with 6970 clocks on their cards, you would have the amount of fails already shown because the 6950 simply cannot clock up to 6970.

This is not a matter of the timings or voltage killing the cards. It's a matter that the memory cannot even be clocked that high.

1. Ultimately, it is better to flash an unlocked 6950 bios and then overclock manually. But there are times when someone may want a 6970 bios on their 6950 and not have to mess with oc gear. In that case, if your memory can run as high as a 6970 card, then flashing the 6950 bios to 6970 bios should be no problem.
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post #56 of 90
What branch of the military are you in? Are you an NCO? What are you talking about 24 hour shifts as a doctor.

Anyways about to hit that 24 hour mark. Looking forward to your proof OP. Hopefully this time you'll follow through unlike with that 460 at 1.02c in a 2d environment.
    
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post #57 of 90
My gpu's have the switch on it which is good but i dont understand your direction anthrax on reflashing it.
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post #58 of 90
I'm surprised that this still rages on given how many months have passed since their release, and the subsequent discovery that the flashing works.

Why the pilgrimmage to remind users that the process can shorten the lifespan of the hardware?

I'm all for people giving others a reality check, but sometimes it's just not worth it.

-5% of cards have 'failed' <---which is subjective and circumstancial
-for the ones that are 'slowly dying' it will be a year, two, three? you'll replace it by then
-if you risk potential damage, you're probably not really worried if you should have to go and buy another card(s), so in effect it's a moot point.
-the general performance gain is negligible

I've run all combinations of 6950 bios(es) in tests both synthetic and real world against 6970s and just like reviews show, especially in Crossfire, these cards have nothing substantial between them in real world scenarios. If you're looking to really nail 3dMark, or Heaven Engine then fine, do it, but I can promise you if there's a game that's just too demanding when you put on (example..) super sampling Anti-aliasing, flashing to a 6970 is not going to recover the 20 fps that you lost with SS AA. It's just not going to happen. So turn down the SS AA and run your normal 6950 at 840/1325.


Sometimes I think this crusade to stop users from flashing to 6970 bios, is actually AMD sales representatives trying to discourage people from a free clock upgrade, and influence them to buy a 6970 instead.
Edited by Hollywood - 5/13/11 at 10:47am
post #59 of 90
Is it only certain BIOS' that increase the voltage and timings?

I followed the directions on techpowerup and had to run the CMD commands to unlock and flash without any issues on an MSI 2gb
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post #60 of 90
Quote:
Originally Posted by Senator View Post
What branch of the military are you in? Are you an NCO? What are you talking about 24 hour shifts as a doctor.

Anyways about to hit that 24 hour mark. Looking forward to your proof OP. Hopefully this time you'll follow through unlike with that 460 at 1.02c in a 2d environment.
This. Fort Carson higher ups may want to know their MD's are blabbering away instead of doing their job.
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