5970 usage % issues | Bitcointalksearch.org

sveetsnelda

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Quote from: DeathAndTaxes on February 09, 2012, 12:37:48 AM

A staggering 104A on the 12V rail. Would like to point out that 1248W of the 1250W is available in 12V in one rail.

And I would like to point out that this is a 4 rail PSU. Cheesy

The diagram on the outside is a bit misleading. Because it's a DC to DC design, all of the PSU's power is pulled from a single 12V rail and then separated into 4 individual rails.

(Here is some more detail on the subject. This is a review of the XFX Pro 1250W Black Edition which is just a rebadged Seasonic 1250).
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=273

This being said though, it's a *FANTASTIC* PSU. I have 13 of them.

DeathAndTaxes

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Gerald Davis

Yeah single rail. It isn't to say a multi-rail PSU can't be good but depending on the rail configuration there can be power left untapped.

I would consider this PSU to be pretty much unbeatable for making 3x5970 or 4x5970 rigs:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817151109

1250W is more than enough for 4x5970 or 3x5970 rig that you want to leave upgrade open. If you know you won't be going w/ 4x5970 1050W is equally good and saves some coins..

A staggering 104A on the 12V rail. Would like to point out that 1248W of the 1250W is available in 12V in one rail.

8 PCIe connectors so 4x5970 is possible without trying to fuck around w/ molex adapters.

A couple of minor points:
a) has oversized power switch which is nice (I set BIOS to turn on after AC loss and just use PSU switch to turn rigs on/off).
b) all cables are modular which reduces cable mess and makes swapping out PSU easy.
c) 5 year warranty and w/ SeaSonic you know who built it (SeaSonic) unlike other companies who just farm the work out.

yochdog

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Quote from: rjk on February 09, 2012, 12:25:44 AM

Quote from: yochdog on February 09, 2012, 12:22:31 AM

Quote from: rjk on February 09, 2012, 12:17:55 AM

Quote from: yochdog on February 09, 2012, 12:14:41 AM

Quote from: DeathAndTaxes on January 13, 2012, 05:08:14 PM

Yeah that is weird.

That PSU is horrible though. It is "ugly" because it only has 750W but it has that broken into 4 different 12V rails. Each rail only has 20A. =240W which is right at what a 5970 needs. It could be starved for power. Have you underclocked the memory (at least down to 300) that will reduce wattage somewhat?

http://www.rosewill.com/products/698/productDetail.htm

The only other thing to try is use 1 power cable for each rail. That way 2 rails are powering the same card. Finding out which cable is on which rail for a PSU like that is tough so you can just try to change the plugs around. Generally for a 5970 a PSU which either has 1 massive 12V or a few large rails makes power management easier.

SO when I go to buy additional PSU's for expansion and replacement, should I be shooting for single 12V rails with 50A+? Or should I go for 2 rails with 25A each?

<3 single rail.

Since you don't seem to be worried by power usage, 80Plus Gold might not appeal to you, but they are well built in any case. Weigh the costs out.

I am tired and not good with lingo.....are you saying less than 3 rails? or are you "hearting" a single rail?

Regardless, thank you for the help.

Hehe, sorry, that was supposed to be a heart. I'll go to sleep now.

Lol.....thanks man. I will be looking for some solid single rail PSU's now. I imagine that is what is holding me back from hitting the "magic" 700 MH/s on all of my 5970's. I wish I knew that before I bought so many of the Rosewill PSU's with 4 rails.

rjk

sr. member

Activity: 448

Merit: 250

1ngldh

Quote from: yochdog on February 09, 2012, 12:22:31 AM

Quote from: rjk on February 09, 2012, 12:17:55 AM

Quote from: yochdog on February 09, 2012, 12:14:41 AM

Quote from: DeathAndTaxes on January 13, 2012, 05:08:14 PM

Yeah that is weird.

That PSU is horrible though. It is "ugly" because it only has 750W but it has that broken into 4 different 12V rails. Each rail only has 20A. =240W which is right at what a 5970 needs. It could be starved for power. Have you underclocked the memory (at least down to 300) that will reduce wattage somewhat?

http://www.rosewill.com/products/698/productDetail.htm

The only other thing to try is use 1 power cable for each rail. That way 2 rails are powering the same card. Finding out which cable is on which rail for a PSU like that is tough so you can just try to change the plugs around. Generally for a 5970 a PSU which either has 1 massive 12V or a few large rails makes power management easier.

SO when I go to buy additional PSU's for expansion and replacement, should I be shooting for single 12V rails with 50A+? Or should I go for 2 rails with 25A each?

<3 single rail.

Since you don't seem to be worried by power usage, 80Plus Gold might not appeal to you, but they are well built in any case. Weigh the costs out.

I am tired and not good with lingo.....are you saying less than 3 rails? or are you "hearting" a single rail?

Regardless, thank you for the help.

Hehe, sorry, that was supposed to be a heart. I'll go to sleep now.

yochdog

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Activity: 2044

Merit: 1000

Quote from: rjk on February 09, 2012, 12:17:55 AM

Quote from: yochdog on February 09, 2012, 12:14:41 AM

Quote from: DeathAndTaxes on January 13, 2012, 05:08:14 PM

Yeah that is weird.

That PSU is horrible though. It is "ugly" because it only has 750W but it has that broken into 4 different 12V rails. Each rail only has 20A. =240W which is right at what a 5970 needs. It could be starved for power. Have you underclocked the memory (at least down to 300) that will reduce wattage somewhat?

http://www.rosewill.com/products/698/productDetail.htm

The only other thing to try is use 1 power cable for each rail. That way 2 rails are powering the same card. Finding out which cable is on which rail for a PSU like that is tough so you can just try to change the plugs around. Generally for a 5970 a PSU which either has 1 massive 12V or a few large rails makes power management easier.

SO when I go to buy additional PSU's for expansion and replacement, should I be shooting for single 12V rails with 50A+? Or should I go for 2 rails with 25A each?

<3 single rail.

Since you don't seem to be worried by power usage, 80Plus Gold might not appeal to you, but they are well built in any case. Weigh the costs out.

I am tired and not good with lingo.....are you saying less than 3 rails? or are you "hearting" a single rail?

Regardless, thank you for the help.

rjk

sr. member

Activity: 448

Merit: 250

1ngldh

Quote from: yochdog on February 09, 2012, 12:14:41 AM

Quote from: DeathAndTaxes on January 13, 2012, 05:08:14 PM

Yeah that is weird.

That PSU is horrible though. It is "ugly" because it only has 750W but it has that broken into 4 different 12V rails. Each rail only has 20A. =240W which is right at what a 5970 needs. It could be starved for power. Have you underclocked the memory (at least down to 300) that will reduce wattage somewhat?

http://www.rosewill.com/products/698/productDetail.htm

The only other thing to try is use 1 power cable for each rail. That way 2 rails are powering the same card. Finding out which cable is on which rail for a PSU like that is tough so you can just try to change the plugs around. Generally for a 5970 a PSU which either has 1 massive 12V or a few large rails makes power management easier.

SO when I go to buy additional PSU's for expansion and replacement, should I be shooting for single 12V rails with 50A+? Or should I go for 2 rails with 25A each?

<3 single rail.

Since you don't seem to be worried by power usage, 80Plus Gold might not appeal to you, but they are well built in any case. Weigh the costs out.

yochdog

legendary

Activity: 2044

Merit: 1000

Quote from: DeathAndTaxes on January 13, 2012, 05:08:14 PM

Yeah that is weird.

That PSU is horrible though. It is "ugly" because it only has 750W but it has that broken into 4 different 12V rails. Each rail only has 20A. =240W which is right at what a 5970 needs. It could be starved for power. Have you underclocked the memory (at least down to 300) that will reduce wattage somewhat?

http://www.rosewill.com/products/698/productDetail.htm

The only other thing to try is use 1 power cable for each rail. That way 2 rails are powering the same card. Finding out which cable is on which rail for a PSU like that is tough so you can just try to change the plugs around. Generally for a 5970 a PSU which either has 1 massive 12V or a few large rails makes power management easier.

SO when I go to buy additional PSU's for expansion and replacement, should I be shooting for single 12V rails with 50A+? Or should I go for 2 rails with 25A each?

DeathAndTaxes

donator

Activity: 1218

Merit: 1079

Gerald Davis

Quote from: yochdog on January 13, 2012, 05:12:36 PM

Quote from: DeathAndTaxes on January 13, 2012, 05:08:14 PM

Yeah that is weird.

That PSU is horrible though. It is "ugly" because it only has 750W but it has that broken into 4 different 12V rails. Each rail only has 20A. =240W which is right at what a 5970 needs. It could be starved for power. Have you underclocked the memory (at least down to 300) that will reduce wattage somewhat?

http://www.rosewill.com/products/698/productDetail.htm

The only other thing to try is use 1 power cable for each rail. That way 2 rails are powering the same card. Finding out which cable is on which rail for a PSU like that is tough so you can just try to change the plugs around. Generally for a 5970 a PSU which either has 1 massive 12V or a few large rails makes power management easier.

Interesting....thank you for the tip. Too bad I have bought about 15 of these PSU's. FFFFFFF

Well since AB turning off change the behavior it might not be that. One thing it "could" be. Were you underclocking ram in AB? I have found sometimes AB says the ram is at xxx but it isn't. If you suspect your clocks might not be what you think they are use GPU-Z to verify.

If memclock was higher than what it appear that could have pushed the card over the limit.

Also the PSU isn't bad just "ugly". Once you figure it out on one you can get it working on all the rigs doing the same thing.

yochdog

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Activity: 2044

Merit: 1000

Quote from: DeathAndTaxes on January 13, 2012, 05:08:14 PM

Yeah that is weird.

That PSU is horrible though. It is "ugly" because it only has 750W but it has that broken into 4 different 12V rails. Each rail only has 20A. =240W which is right at what a 5970 needs. It could be starved for power. Have you underclocked the memory (at least down to 300) that will reduce wattage somewhat?

http://www.rosewill.com/products/698/productDetail.htm

The only other thing to try is use 1 power cable for each rail. That way 2 rails are powering the same card. Finding out which cable is on which rail for a PSU like that is tough so you can just try to change the plugs around. Generally for a 5970 a PSU which either has 1 massive 12V or a few large rails makes power management easier.

Interesting....thank you for the tip. Too bad I have bought about 15 of these PSU's. FFFFFFF

DeathAndTaxes

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Activity: 1218

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Gerald Davis

Quote from: yochdog on January 13, 2012, 05:04:48 PM

Oh good hell.....I just swithed from Afterburner to CCC, and now it is running both GPU's at 330+.

I will report back later if it keeps working. Any thoughts on why that worked?!

None. I do know I never got stable systems w/ AB though. I don't even install CCC either. I just use cgminer for everything.

DeathAndTaxes

donator

Activity: 1218

Merit: 1079

Gerald Davis

Yeah that is weird.

That PSU is horrible though. It is "ugly" because it only has 750W but it has that broken into 4 different 12V rails. Each rail only has 20A. =240W which is right at what a 5970 needs. It could be starved for power. Have you underclocked the memory (at least down to 300) that will reduce wattage somewhat?

http://www.rosewill.com/products/698/productDetail.htm

The only other thing to try is use 1 power cable for each rail. That way 2 rails are powering the same card. Finding out which cable is on which rail for a PSU like that is tough so you can just try to change the plugs around. Generally for a 5970 a PSU which either has 1 massive 12V or a few large rails makes power management easier.

yochdog

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Activity: 2044

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Oh good hell.....I just swithed from Afterburner to CCC, and now it is running both GPU's at 330+.

I will report back later if it keeps working. Any thoughts on why that worked?!

yochdog

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Quote from: DeathAndTaxes on January 13, 2012, 04:58:06 PM

Quote from: yochdog on January 13, 2012, 04:54:24 PM

Quote from: DeathAndTaxes on January 11, 2012, 08:21:32 AM

Quote from: Transisto on January 11, 2012, 03:01:13 AM

I suspect VRM overheating. Having the same problem and still looking for replacement thermal pads.

To OP since you have enough power, use GPU-Z (windows only). It will provide you all of temp readings (5 on 5970).

Also the GPU which won't stay @ 99%. What happens if you try to mine w/ that GPU only?

If I only have one GPU mining, there is no problem.....it will mine at 330+ all day. It is when I go with both that one will drop to 50-60%.

Very Frustrating.

Hmm and this happens almost immediately?

Your 750W PSU you got a model #? How many 12V rails? Are both cards on same rail? What is amperage on that rail?

Yes, generally the one that was running stays at 330, and the new one only gets up to 230. Then if I switch off the frrst one, the second will jump right up to 330.

I am only running a single 5970, on a Rosewill 750 watt PSU. It is this one:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182067

DeathAndTaxes

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Gerald Davis

Quote from: yochdog on January 13, 2012, 04:54:24 PM

Quote from: DeathAndTaxes on January 11, 2012, 08:21:32 AM

Quote from: Transisto on January 11, 2012, 03:01:13 AM

I suspect VRM overheating. Having the same problem and still looking for replacement thermal pads.

To OP since you have enough power, use GPU-Z (windows only). It will provide you all of temp readings (5 on 5970).

Also the GPU which won't stay @ 99%. What happens if you try to mine w/ that GPU only?

If I only have one GPU mining, there is no problem.....it will mine at 330+ all day. It is when I go with both that one will drop to 50-60%.

Very Frustrating.

Hmm and this happens almost immediately?

Your 750W PSU you got a model #? How many 12V rails? Are both cards on same rail? What is amperage on that rail?

yochdog

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Quote from: DeathAndTaxes on January 11, 2012, 08:21:32 AM

Quote from: Transisto on January 11, 2012, 03:01:13 AM

I suspect VRM overheating. Having the same problem and still looking for replacement thermal pads.

To OP since you have enough power, use GPU-Z (windows only). It will provide you all of temp readings (5 on 5970).

Also the GPU which won't stay @ 99%. What happens if you try to mine w/ that GPU only?

If I only have one GPU mining, there is no problem.....it will mine at 330+ all day. It is when I go with both that one will drop to 50-60%.

Very Frustrating.

DeathAndTaxes

donator

Activity: 1218

Merit: 1079

Gerald Davis

Quote from: Transisto on January 11, 2012, 03:01:13 AM

I suspect VRM overheating. Having the same problem and still looking for replacement thermal pads.

To OP since you have enough power, use GPU-Z (windows only). It will provide you all of temp readings (5 on 5970).

Also the GPU which won't stay @ 99%. What happens if you try to mine w/ that GPU only?

Transisto

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I suspect VRM overheating. Having the same problem and still looking for replacement thermal pads.

yochdog

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Quote from: sveetsnelda on January 10, 2012, 06:33:54 PM

Although the PSU probably isn't causing your issue, be careful. Depending on the efficiency of the PSU you use, three of those cards should draw around 850-900 watts (between the cards and the board/CPU). ...That's assuming you're undervolting your cards and turning the memory clock down, too.

My dual 5970 rigs that are undervolted and running at 900/150 are drawing 630 from the wall with a fairly decent Seasonic 620W PSU. This means that the system is drawing around 520 watts on the input side. If I were to add a 3rd card to this rig with a similarly efficient PSU, I'd be drawing almost 900 watts at the wall. This would certainly be pushing the limits of your 750W. If it runs & runs stable, it might not last long.

Lol....no no no.....There is only a single 5970 on this PSU. Sorry for the confusion!

DeathAndTaxes

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Gerald Davis

do you have 1 5970 or 3x5970 on that 750W.

If it is 1 well I don't have a clue because more than enough power. If it is 3x5970 you are overloading the 12V rail. even memory downclocked to 190Mhz a 5970 pulls about 220W-230W (DC, AC would be ~10% higher).

On my 3x5970 rigs I pull about 870W at the wall which means a DC load of likely ~800W.

sveetsnelda

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Although the PSU probably isn't causing your issue, be careful. Depending on the efficiency of the PSU you use, three of those cards should draw around 850-900 watts (between the cards and the board/CPU). ...That's assuming you're undervolting your cards and turning the memory clock down, too.

My dual 5970 rigs that are undervolted and running at 900/150 are drawing 630 from the wall with a fairly decent Seasonic 620W PSU. This means that the system is drawing around 520 watts on the input side. If I were to add a 3rd card to this rig with a similarly efficient PSU, I'd be drawing almost 900 watts at the wall. This would certainly be pushing the limits of your 750W. If it runs & runs stable, it might not last long.

Topic: 5970 usage % issues (Read 2643 times)