Bitcoin Forum
December 03, 2016, 11:57:11 PM *
News: To be able to use the next phase of the beta forum software, please ensure that your email address is correct/functional.
 
   Home   Help Search Donate Login Register  
Pages: [1]
  Print  
Author Topic: 6950 to 6970  (Read 1083 times)
gellimac
Full Member
***
Offline Offline

Activity: 126



View Profile
August 03, 2011, 11:49:39 AM
 #1

Hi

The 6950 and 6970 are the same, the 6950 has just some shaders unactivated.

If you want to activat them you have to flash the card

http://www.techpowerup.com/articles/overclocking/159
1480809431
Hero Member
*
Offline Offline

Posts: 1480809431

View Profile Personal Message (Offline)

Ignore
1480809431
Reply with quote  #2

1480809431
Report to moderator
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
1480809431
Hero Member
*
Offline Offline

Posts: 1480809431

View Profile Personal Message (Offline)

Ignore
1480809431
Reply with quote  #2

1480809431
Report to moderator
1480809431
Hero Member
*
Offline Offline

Posts: 1480809431

View Profile Personal Message (Offline)

Ignore
1480809431
Reply with quote  #2

1480809431
Report to moderator
Miner99er
Sr. Member
****
Offline Offline

Activity: 310


View Profile
August 03, 2011, 12:52:22 PM
 #2

This was known within the week the 6950 was released.

You're telling us nothing new.

Bought From Yochdogx2, Alexmat, SgtSpike, David_Benz, Beaflag VonRathburg, Slaveindebt, Cptmooseinc, Coinhoarder

Donations? SURE! 16foPr8FAjYXKL8ApQAzihnigXm1qNhi8Q

http://pyramining.com/referral/yfab9med7   
http://pyramining.com/referral/ahmc7en6z
http://pyramining.com/referral/pagndq4xc   
http://pyramining.com/referral/79b2gmrzx
http://pyramining.com/referral/e2ghz4asy
airdata
Sr. Member
****
Offline Offline

Activity: 406


View Profile
August 03, 2011, 01:19:06 PM
 #3

Can somebody suggest which 6950 would be best to buy?  Do all of them unlock or are there certain ones that don't?

If you goto newegg and search '6950' it comes up with something like 23 results!!!  All appear to be in stock.  Prices ranging from $200 after MIR to $300.  Only difference I can see is that some have varying OC settings from factory.
cicada
Full Member
***
Offline Offline

Activity: 196


View Profile
August 03, 2011, 03:18:03 PM
 #4

Can somebody suggest which 6950 would be best to buy?  Do all of them unlock or are there certain ones that don't?

If you goto newegg and search '6950' it comes up with something like 23 results!!!  All appear to be in stock.  Prices ranging from $200 after MIR to $300.  Only difference I can see is that some have varying OC settings from factory.

Do not buy a 6950 relying on being able to unlock the shaders.  This has been beaten to death over and over on other threads here and several other OC forums.  

There is no 100% guarantee you'll be able to unlock shaders on any particular card, even two cards in the same production run may act differently, and the odds of getting one that actually will unlock seem to be dropping quickly.

Avoid the 1GB models if you want to have a chance; none of these are reference cards, and from my personal experience and reading accounts of others, it's highly unlikely you'll unlock shaders on these models.

The 2GB cards have better luck, if you find a reference 2GB 6950 it's your best chance to unlock shaders.  However, newer revisions of several of the 2GB cards appear to be hard-locked (physical disconnect of extra shaders).

Read through the reviews for a particular card to get an idea if it seems to be unlockable.   Also assume that you'll be voiding your warranty right out of the box, not every company is as lax as XFX Wink


Team Epic!

All your bitcoin are belong to 19mScWkZxACv215AN1wosNNQ54pCQi3iB7
cicada
Full Member
***
Offline Offline

Activity: 196


View Profile
August 03, 2011, 03:42:18 PM
 #5

Can somebody suggest which 6950 would be best to buy?

Addendum to the above since I didn't actually answer your question - I have 4x XFX 1GB 6950s (ZDDC model @ 830mhz with two fans).  I can push them to about 355MH/s.

In linux, I cannot downclock the memory more than 125mhz less than the GPU clock, I can't overclock any of them past 885mhz without issues, and I can't alter the voltages to try to stabilize them past that.  Not that I would want to - they run hot, and suck down near 200W each on stock voltages.

I can safely say I won't be getting more 6950s unless there are not other reasonable options.  Without the 58XX series cards in the mix, however, they're pretty much it if you want a semi-reasonable $ / MH ratio.

Team Epic!

All your bitcoin are belong to 19mScWkZxACv215AN1wosNNQ54pCQi3iB7
Supercrit
Jr. Member
*
Offline Offline

Activity: 41


View Profile
August 03, 2011, 04:38:56 PM
 #6

I got 2 6950 2GB sapphire reference design recently, 1 new 1 used, both successfully unlocked 1536 shaders, need to do some command line to unlock the bios first(write protected by default), and I've read that only reference version has high % of unlock.

Both can go to 900mhz core at stock voltage, full stable, they get ~400mh/s  each
ManOfKnight
Full Member
***
Offline Offline

Activity: 145


View Profile
August 03, 2011, 10:49:16 PM
 #7

Can somebody suggest which 6950 would be best to buy?  Do all of them unlock or are there certain ones that don't?

If you goto newegg and search '6950' it comes up with something like 23 results!!!  All appear to be in stock.  Prices ranging from $200 after MIR to $300.  Only difference I can see is that some have varying OC settings from factory.

Only reference cards can be modded.  NO NEW CARDS CAN BE MODDED.  None.  Don't believe what people will tell you.  Only the first ones that came out that were reference cards had the dual bios and had the shaders that could be unlocked.

Striking it rich in Bitcoin is no longer an option...I do it for fun.
*Image Removed*
Jack of Diamonds
Sr. Member
****
Offline Offline

Activity: 252



View Profile
August 04, 2011, 02:36:23 AM
 #8

Can somebody suggest which 6950 would be best to buy?  Do all of them unlock or are there certain ones that don't?

If you goto newegg and search '6950' it comes up with something like 23 results!!!  All appear to be in stock.  Prices ranging from $200 after MIR to $300.  Only difference I can see is that some have varying OC settings from factory.

Only reference cards can be modded.  NO NEW CARDS CAN BE MODDED.  None.  Don't believe what people will tell you.  Only the first ones that came out that were reference cards had the dual bios and had the shaders that could be unlocked.

This.

Don't buy the new cards, especially 1GB, unless you want to mess around with a 'bubblegum hardmod' which might not even work.

If you want a 6970 for the price of a 6950 through BIOS flashing, try finding one of the old reference models.

1f3gHNoBodYw1LLs3ndY0UanYB1tC0lnsBec4USeYoU9AREaCH34PBeGgAR67fx
st4rdust
Full Member
***
Offline Offline

Activity: 188



View Profile
August 04, 2011, 06:28:49 PM
 #9

Without the 58XX series cards in the mix, however, they're pretty much it if you want a semi-reasonable $ / MH ratio.

Actually the 6950s don't do very well in terms of Mh/$ ratio. You said yours max out around 355Mh/s. Newegg lists the XFX 6950 1gb model, which is the card you mentioned, at $240, making the Mh/$ ratio just under 1.5 Mh/$. That being said, there are plenty of cards available now which easily clear the 2 Mh/$ mark.

The 5770/6770 cards (essentially the same GPU) do 220Mh/s and above, so if you can buy one for under $110 (which there are plenty of deals for $110 and less) you've broken the 2 Mh/$ mark, assuming you can push it past the hash rate I mentioned.

5830s can still be found, although they are becoming increasingly difficult to find. That being said I bought two a couple of weeks ago for $130 each and I have them doing 315 Mh/s for a ratio of about 2.4 Mh/$. This is about as high of a ratio as is currently possible with available cards.

5850s are all but gone from the marketplace, however I used to see these sell for $160 and it's possible to push them above 400Mh/s, making its ratio a solid 2.5 Mh/$. If you can find one, this is about the best you can do in terms of Mh/$.

2 Mh/$ seems to be the mark that everybody aims for, and there are plenty of cards that can do this. As for the 6950, the best bet for maxing out its Mh/$ ratio is hoping you can get a reference card whose shaders are able to be unlocked. This adds a significant performance boost into the 400Mh/s territory. Even so, the ratio would be under 2 Mh/$ but 400Mh/s is not something any card with a 2 Mh/$ ratio can hit. At a certain point, it becomes less important to get the highest ratio possible in favor of getting a high Mh/s rate from a single card.

If you should choose to pity me -14GLjCUE7ohxRLvwZD2sfjKjf22Lt3UHip
Jazkal
Sr. Member
****
Offline Offline

Activity: 319



View Profile
August 04, 2011, 06:46:39 PM
 #10

Only reference cards can be modded.  NO NEW CARDS CAN BE MODDED.  None.  Don't believe what people will tell you.  Only the first ones that came out that were reference cards had the dual bios and had the shaders that could be unlocked.
Sorry ManOfKnight, but you are WRONG. I speak from personal experience, not just saying I heard it somewhere on the internet. And I'm talking brand spanking new model cards with twin fans (non-reference) and only 1gig of ram.

airdata, I suggest that you go over to a hardware modding/overclocking site and do some reading there. (http://www.overclockers.com/forums/)

Not saying it is easy like it was when the first reference cards came out, or even that all new cards can be unlocked (they can't).

EDIT:
Here is the page I use to unlock my 6950's
http://hardforum.com/showthread.php?p=1037577079

I use a CircuitWriter pen instead of the bubblegum. Wink All you have to do is write on top of the chip to connect the two pins (very easy).
http://www.amazon.com/gp/product/B0002BBVQO

Pages: [1]
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!