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Author Topic: 7970 mining thread  (Read 18675 times)
film2240
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January 31, 2012, 05:52:23 PM
 #21

I'd be interested in getting one of these cards HD7970 (or HD7990 when its out).Only issue is the cost and that additional cost for upgrading my PSU.In UK both are expensive.
I saw was this: http://www.kikatek.com/product_info.php?products_id=241798&strAction=NoStock for £416.I noticed also that in UK a lot of these cards are out of stock.Could there be a high demand in UK for mining/gaming?

The hashrate (600MHash) is much better than my heavily OC'd HD6950 (which gives ~400Mhash/s stable as PSU can't seem to cope above this).Lets see,my HD6950 only cost me £177.50 whereas HD7970 costs £416 for a 200Mhash/s boost.So in UK,I'd be paying (£416 - £177.50) £238.50 extra just for a boost in 200Mhash/s so not a really good path for me yet.

In my case,you'd also have to factor an upgrade in PSU and the lesser value you'd get from my old one (current PSU is 5yrs old+) so that would add to costs even more.

I just wish that these HD7970s were much cheaper so I could get my hands on one.I wonder why it won't work with GUIMiner (thats the only mining app I can use as the others are too complex/cumbersome for me) ?

I'm happy to know that I can get 0.6GHash/s (600M/hashs) from 1 GPU.

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yochdog
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January 31, 2012, 07:27:55 PM
 #22

I'd be interested in getting one of these cards HD7970 (or HD7990 when its out).Only issue is the cost and that additional cost for upgrading my PSU.In UK both are expensive.
I saw was this: http://www.kikatek.com/product_info.php?products_id=241798&strAction=NoStock for £416.I noticed also that in UK a lot of these cards are out of stock.Could there be a high demand in UK for mining/gaming?

The hashrate (600MHash) is much better than my heavily OC'd HD6950 (which gives ~400Mhash/s stable as PSU can't seem to cope above this).Lets see,my HD6950 only cost me £177.50 whereas HD7970 costs £416 for a 200Mhash/s boost.So in UK,I'd be paying (£416 - £177.50) £238.50 extra just for a boost in 200Mhash/s so not a really good path for me yet.

In my case,you'd also have to factor an upgrade in PSU and the lesser value you'd get from my old one (current PSU is 5yrs old+) so that would add to costs even more.

I just wish that these HD7970s were much cheaper so I could get my hands on one.I wonder why it won't work with GUIMiner (thats the only mining app I can use as the others are too complex/cumbersome for me) ?

I'm happy to know that I can get 0.6GHash/s (600M/hashs) from 1 GPU.

Its all about density for me now.....MH/dollar is secondary.  Thus, I am basically down to only using 7970's and 5970's where they are able to fit. 

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January 31, 2012, 07:53:14 PM
 #23

I'd be interested in getting one of these cards HD7970 (or HD7990 when its out).Only issue is the cost and that additional cost for upgrading my PSU.In UK both are expensive.
I saw was this: http://www.kikatek.com/product_info.php?products_id=241798&strAction=NoStock for £416.I noticed also that in UK a lot of these cards are out of stock.Could there be a high demand in UK for mining/gaming?

The hashrate (600MHash) is much better than my heavily OC'd HD6950 (which gives ~400Mhash/s stable as PSU can't seem to cope above this).Lets see,my HD6950 only cost me £177.50 whereas HD7970 costs £416 for a 200Mhash/s boost.So in UK,I'd be paying (£416 - £177.50) £238.50 extra just for a boost in 200Mhash/s so not a really good path for me yet.

In my case,you'd also have to factor an upgrade in PSU and the lesser value you'd get from my old one (current PSU is 5yrs old+) so that would add to costs even more.

I just wish that these HD7970s were much cheaper so I could get my hands on one.I wonder why it won't work with GUIMiner (thats the only mining app I can use as the others are too complex/cumbersome for me) ?

I'm happy to know that I can get 0.6GHash/s (600M/hashs) from 1 GPU.

Its all about density for me now.....MH/dollar is secondary.  Thus, I am basically down to only using 7970's and 5970's where they are able to fit. 

agreed....HOWEVER it is very hard to pull out a 2.1G 5870 rig that is only pulling 925watts and been running for months without problems.

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yochdog
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January 31, 2012, 08:26:37 PM
 #24

I'd be interested in getting one of these cards HD7970 (or HD7990 when its out).Only issue is the cost and that additional cost for upgrading my PSU.In UK both are expensive.
I saw was this: http://www.kikatek.com/product_info.php?products_id=241798&strAction=NoStock for £416.I noticed also that in UK a lot of these cards are out of stock.Could there be a high demand in UK for mining/gaming?

The hashrate (600MHash) is much better than my heavily OC'd HD6950 (which gives ~400Mhash/s stable as PSU can't seem to cope above this).Lets see,my HD6950 only cost me £177.50 whereas HD7970 costs £416 for a 200Mhash/s boost.So in UK,I'd be paying (£416 - £177.50) £238.50 extra just for a boost in 200Mhash/s so not a really good path for me yet.

In my case,you'd also have to factor an upgrade in PSU and the lesser value you'd get from my old one (current PSU is 5yrs old+) so that would add to costs even more.

I just wish that these HD7970s were much cheaper so I could get my hands on one.I wonder why it won't work with GUIMiner (thats the only mining app I can use as the others are too complex/cumbersome for me) ?

I'm happy to know that I can get 0.6GHash/s (600M/hashs) from 1 GPU.

Its all about density for me now.....MH/dollar is secondary.  Thus, I am basically down to only using 7970's and 5970's where they are able to fit. 

agreed....HOWEVER it is very hard to pull out a 2.1G 5870 rig that is only pulling 925watts and been running for months without problems.

I hear ya.....but at some point, that becomes the ONLY option to increase hashing speed (excluding the Bitforce miracle, or course). 

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February 01, 2012, 12:44:22 AM
 #25

I'd be interested in getting one of these cards HD7970 (or HD7990 when its out).Only issue is the cost and that additional cost for upgrading my PSU.In UK both are expensive.
I saw was this: http://www.kikatek.com/product_info.php?products_id=241798&strAction=NoStock for £416.I noticed also that in UK a lot of these cards are out of stock.Could there be a high demand in UK for mining/gaming?

The hashrate (600MHash) is much better than my heavily OC'd HD6950 (which gives ~400Mhash/s stable as PSU can't seem to cope above this).Lets see,my HD6950 only cost me £177.50 whereas HD7970 costs £416 for a 200Mhash/s boost.So in UK,I'd be paying (£416 - £177.50) £238.50 extra just for a boost in 200Mhash/s so not a really good path for me yet.

In my case,you'd also have to factor an upgrade in PSU and the lesser value you'd get from my old one (current PSU is 5yrs old+) so that would add to costs even more.

I just wish that these HD7970s were much cheaper so I could get my hands on one.I wonder why it won't work with GUIMiner (thats the only mining app I can use as the others are too complex/cumbersome for me) ?

I'm happy to know that I can get 0.6GHash/s (600M/hashs) from 1 GPU.

Your avatar is of trunk bay... I was just there that place is like disneyland for adults. Tongue
film2240
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February 01, 2012, 08:51:21 AM
 #26

Your avatar is of trunk bay... I was just there that place is like disneyland for adults. Tongue

So thats what the place is.I've always wondered what that place was.I adopted that avatar as I like the nice landscapes.Didn't know that is like a Disneyland for adults, Ken.

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JWU42
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February 01, 2012, 04:00:45 PM
 #27

posting initial results of test:

2 rigs  each has:
mobo:  crosshair V
cpu:    phenomx4
psu:   seasonic 1250
mem:  4g 1600
all defaults

4x5970
filesys:    4g corsair mini  linuxcoin cgminer
voltage:  1.05
clocks:   820/300
killwatt:  1170
Mh:        2970

5x7970
filesys:    wd green 500g  win7  diablo
voltage:  1.056
clocks:   1049/685
killwatt:  1160
Mh:        3120


looks to me like the 7970 can/will compete head to head with the king

I assume you are comfortable running at 1160/1170 watts on a 1250 watt psu since the PSU is probably pushing 88% (~1020W) and within the general practice of driving it not beyond 80%?  For those of us less wise (like me), we must remember that the draw from the wall is not what the PSU is outputting and the 1250 measurement is output and NOT draw.

Thanks in Advance!

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jjiimm_64
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February 01, 2012, 04:16:20 PM
 #28

posting initial results of test:

2 rigs  each has:
mobo:  crosshair V
cpu:    phenomx4
psu:   seasonic 1250
mem:  4g 1600
all defaults

4x5970
filesys:    4g corsair mini  linuxcoin cgminer
voltage:  1.05
clocks:   820/300
killwatt:  1170
Mh:        2970

5x7970
filesys:    wd green 500g  win7  diablo
voltage:  1.056
clocks:   1049/685
killwatt:  1160
Mh:        3120


looks to me like the 7970 can/will compete head to head with the king

I assume you are comfortable running at 1160/1170 watts on a 1250 watt psu since the PSU is probably pushing 88% (~1020W) and within the general practice of driving it not beyond 80%?  For those of us less wise (like me), we must remember that the draw from the wall is not what the PSU is outputting and the 1250 measurement is output and NOT draw.

Thanks in Advance!

I believe the seasonics are rated for continuous output at the advertised rate (1250,750,etc) and will deliver higher peak power levels.  google it.  seasonic is the one!!

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February 01, 2012, 09:16:01 PM
 #29

^This.  As long as you load the power supply properly, you'll trip a 15A 120V breaker before overloading this PSU.  Again, be careful though.  this is actually a FOUR rail PSU even though the packaging indicates otherwise.

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jjiimm_64
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February 01, 2012, 11:47:35 PM
 #30

^This.  As long as you load the power supply properly, you'll trip a 15A 120V breaker before overloading this PSU.  Again, be careful though.  this is actually a FOUR rail PSU even though the packaging indicates otherwise.


I actually did this just as a comparison to the 5970. Now the config is as follows: Not sure if this is one rig or tw0 Wink


power  220V
Psu's   3 seasonic  2x1250 1x650
mobos  2
7970    10 (5 each mobo)

the 1250's are powering 4x7970 + mobo + hd
the 650 is powering 1 7970 on each mobo

#1 clocks  1143 volts   1162/685  core/mem
#2 clocks  1125 volts   1125/685  core/mem

Mhash #1  3453+  (i haven't hooked a monitor on it in days, so dont remember exactly)
Mhash #2  3340  

total 6790+  

uptime, 170k accepted shares..

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February 08, 2012, 03:36:03 AM
 #31

So getting very close to 700 Mh per card.  I am getting closer to building a rig!

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February 08, 2012, 04:44:33 AM
 #32

So getting very close to 700 Mh per card.  I am getting closer to building a rig!


no reason to wait..  a 5970 is a 750Mh card.  Smiley


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February 08, 2012, 06:44:06 AM
 #33

no reason to wait..  a 5970 is a 750Mh card.  Smiley

<pedant>
800Mh Stable@800Mhz overclock
</pedant>
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February 08, 2012, 02:21:36 PM
 #34

no reason to wait..  a 5970 is a 750Mh card.  Smiley

<pedant>
800Mh Stable@800Mhz overclock
</pedant>

I have over 20 of these...  at 820/300 they get a solid  373 per core...  Please show us pics of 800Mh getting 400......stable

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February 08, 2012, 03:03:37 PM
 #35

no reason to wait..  a 5970 is a 750Mh card.  Smiley

<pedant>
800Mh Stable@800Mhz overclock
</pedant>

I have over 20 of these...  at 820/300 they get a solid  373 per core...  Please show us pics of 800Mh getting 400......stable

Agreed - Mine run at 800 / 300 or 800/180 (Phoenix/CGMiner) and don't get past 368 Mh/s.

@jjiimm_64 - yes, price gap isn't as large as it was 6 weeks ago when you could get a 5970 for $300.  I am still a sucker for 5870's for under $130, though.

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yochdog
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February 08, 2012, 05:59:16 PM
 #36

no reason to wait..  a 5970 is a 750Mh card.  Smiley

<pedant>
800Mh Stable@800Mhz overclock
</pedant>

I have over 20 of these...  at 820/300 they get a solid  373 per core...  Please show us pics of 800Mh getting 400......stable


What are you using for this?  I use GUIminer with afterburner, and I cannot seem to get more than 315-320 per core. 


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February 08, 2012, 07:00:23 PM
 #37



Not sure what to say, folks.

GPU 0 is a 6970
GPU 4&5 are the 5970

Using Phoenix w/Phatk
jjiimm_64
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February 08, 2012, 07:42:05 PM
 #38



Not sure what to say, folks.

GPU 0 is a 6970
GPU 4&5 are the 5970

Using Phoenix w/Phatk

sorry to be so skeptical....  I see that 4 and 5 do indeed look like a 5970  v1.05, missing fan and all, 

1.  what is gpu 1,2,3 ?

Please show all 5 running!  I am willing to bet that the 2 windows your showing at 400Mh are not the 5970, if it is the 5970 your clocking it to 900! 

it is simple math.cycles in hashes out.  you clock a 5870 down to 800 and see what you get!

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jjiimm_64
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February 08, 2012, 07:43:14 PM
 #39

no reason to wait..  a 5970 is a 750Mh card.  Smiley

<pedant>
800Mh Stable@800Mhz overclock
</pedant>

I have over 20 of these...  at 820/300 they get a solid  373 per core...  Please show us pics of 800Mh getting 400......stable


What are you using for this?  I use GUIminer with afterburner, and I cannot seem to get more than 315-320 per core. 



cgminer.  controls fans, clocks, and mem with one click.  Fk afterburner

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February 08, 2012, 08:20:46 PM
 #40

1.  what is gpu 1,2,3 ?

 There is no GPU 1, 2 or 3. That's how the two cards (3 GPUs) show up as logical devices for me. No idea why they aren't sequentially numbered.

 Same for a 2 x 6970 + 1 5770 setup I have; the first two 6970's show us as GPU 0 and 4, and the 5770 shows up as GPU 8.

 Same for a 1 x 6970 + 1 x 6990 setup I have; 6970 shows up as GPU 0 and the 6990 shows up as GPU 4 and 9.

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