Thanks for all your tips guys, It's not over yet, still having loads of crashes, ATM I am running 750/300 1.00v for all four (two cards)
about 310 per core @ 1.250~ just seeing how this goes, If not I will throw a paddy! and drop another 10 core.
Topic: 5970 voltage understanding (Read 1744 times)
I have 1 x 5970 and 4 x 5850 (flashed to 5870) on one rig. CGMiner and Xubuntu 11.04 64b. The 5970 runs stable at V=0.95 E=710 M=150 & Mhs 324 per GPU. The cool core will go to E=720 but the hot Core will not take E=720 it needs 710 to stay stable. My room temp is either hot or hotter (tropical) and the fan run at 56% in an open frame rig.
There is a very good thread somewhere here on 5970's take a look. Thats where I got those settings from
Edit try here:- https://bitcointalksearch.org/topic/5970-energy-efficiency-98901
There is a very good thread somewhere here on 5970's take a look. Thats where I got those settings from
Edit try here:- https://bitcointalksearch.org/topic/5970-energy-efficiency-98901
i run mine stable at 775core/190mem/1.00v. i wish i have a kill a watt to say power usage. but i think those are profitable clocks 
EDIT- mhashes are 355 per core
EDIT- mhashes are 355 per core
Been on it most all day (your fault!) I got it stable @ 300/800 1.024v about 338 hash per core, droped me to about 580w from 615w and about 5c temp drop.
I will let it run in at that for a while, then play some more in the week I think, now I got to set my 5870, everyone has different stock volts, mine is 1.162v 300/900 392 hash.
I will let it run in at that for a while, then play some more in the week I think, now I got to set my 5870, everyone has different stock volts, mine is 1.162v 300/900 392 hash.
well 1.00v killed it (hung - resetting display driver - freezes giumuner and no mouse!)
is there a point trying between 1.00v and 1.05v? seems insignificant to me.
is there a point trying between 1.00v and 1.05v? seems insignificant to me.
The lower your voltage, the less you can overclock. Unfortunately those 5970s make "jumps" in the V readings.
0.95 is the minimum, and I had my 5970s running at 675MHz.
0.96-1.00 is the same, and usually people run at stock or slight higher speeds, maybe 725MHz or 750MHz?
1.01-1.05 is the same, and is stock, which will allow you to reach your 825MHz.
From your other thread, you're running 2 5970s for about 1.4GH/s @ 620W, right? Underclocking and undervolting would bring you down to 1.2GH/s @ maybe 400-450W, with lower temps and less noisy fans.
Ahhhhh thank you thank you thank you!! I just needed it told to me like this lol.
see I dropped it to 1.00v but left other settings at 300/825! no wonder why it crashed!
So at 1.00v I should get 750 clocks? I would like to be at 800 core, if I went 1.01v would this be possible?
Glad I could help!
You can try it with 1.00V @ 750MHz and see if it works. If it doesn't, drop it down by 10MHz at a time until its stable.
Each card is different, so it really depend on how well your specific cores can OC at any certain voltage. Trial and error is your friend.
well 1.00v killed it (hung - resetting display driver - freezes giumuner and no mouse!)
is there a point trying between 1.00v and 1.05v? seems insignificant to me.
is there a point trying between 1.00v and 1.05v? seems insignificant to me.
The lower your voltage, the less you can overclock. Unfortunately those 5970s make "jumps" in the V readings.
0.95 is the minimum, and I had my 5970s running at 675MHz.
0.96-1.00 is the same, and usually people run at stock or slight higher speeds, maybe 725MHz or 750MHz?
1.01-1.05 is the same, and is stock, which will allow you to reach your 825MHz.
From your other thread, you're running 2 5970s for about 1.4GH/s @ 620W, right? Underclocking and undervolting would bring you down to 1.2GH/s @ maybe 400-450W, with lower temps and less noisy fans.
Ahhhhh thank you thank you thank you!! I just needed it told to me like this lol.
see I dropped it to 1.00v but left other settings at 300/825! no wonder why it crashed!
So at 1.00v I should get 750 clocks? I would like to be at 800 core, if I went 1.01v would this be possible?
well 1.00v killed it (hung - resetting display driver - freezes giumuner and no mouse!)
is there a point trying between 1.00v and 1.05v? seems insignificant to me.
is there a point trying between 1.00v and 1.05v? seems insignificant to me.
The lower your voltage, the less you can overclock. Unfortunately those 5970s make "jumps" in the V readings.
0.95 is the minimum, and I had my 5970s running at 675MHz.
0.96-1.00 is the same, and usually people run at stock or slight higher speeds, maybe 725MHz or 750MHz?
1.01-1.05 is the same, and is stock, which will allow you to reach your 825MHz.
From your other thread, you're running 2 5970s for about 1.4GH/s @ 620W, right? Underclocking and undervolting would bring you down to 1.2GH/s @ maybe 400-450W, with lower temps and less noisy fans.
I'm a huge fan of undervolting, but it's really up to the card how low you can go. I would try going to 1.00V and seeing how that runs.
The main benfits are lower temps, and lower power consumption. Sometimes the change is pretty drastic, esp on those dual GPU cards. Lower temps also means lower fan speeds, but I've gotten in trouble for saying that extends fan life before
The main benfits are lower temps, and lower power consumption. Sometimes the change is pretty drastic, esp on those dual GPU cards. Lower temps also means lower fan speeds, but I've gotten in trouble for saying that extends fan life before
well 1.00v killed it (hung - resetting display driver - freezes giumuner and no mouse!)
is there a point trying between 1.00v and 1.05v? seems insignificant to me.
if you pay for electricity, of course.. the electricity savings/cost for undervolting/overvolting is exponential. if you can reduce voltage by 5%, you're probably saving 10% in electricity.
I'm a huge fan of undervolting, but it's really up to the card how low you can go. I would try going to 1.00V and seeing how that runs.
The main benfits are lower temps, and lower power consumption. Sometimes the change is pretty drastic, esp on those dual GPU cards. Lower temps also means lower fan speeds, but I've gotten in trouble for saying that extends fan life before
The main benfits are lower temps, and lower power consumption. Sometimes the change is pretty drastic, esp on those dual GPU cards. Lower temps also means lower fan speeds, but I've gotten in trouble for saying that extends fan life before
well 1.00v killed it (hung - resetting display driver - freezes giumuner and no mouse!)
is there a point trying between 1.00v and 1.05v? seems insignificant to me.
I'm a huge fan of undervolting, but it's really up to the card how low you can go. I would try going to 1.00V and seeing how that runs.
The main benfits are lower temps, and lower power consumption. Sometimes the change is pretty drastic, esp on those dual GPU cards. Lower temps also means lower fan speeds, but I've gotten in trouble for saying that extends fan life before
The main benfits are lower temps, and lower power consumption. Sometimes the change is pretty drastic, esp on those dual GPU cards. Lower temps also means lower fan speeds, but I've gotten in trouble for saying that extends fan life before
Go to Start, and search for "snipping tool". Take screenshot of desired area, and save picture. 
hiya, I have a rig with 2x 5970 in, now, best show my pic first.
as you can see (sorry about quality, taken my about 30 pics to get this one! lol) I run 300/825 on stock volts.
Temp is good, So do I really need to change them? I only ask because I see loads of threads taking about volt mods and it can save a cards life, can someone give a basic explination of why higher/lower, What situation it can be applied, and If its better I do or not? This is being run 24/7 prob till end of year, What do you think people?
EDIT - also on vista with sdk2.4
as you can see (sorry about quality, taken my about 30 pics to get this one! lol) I run 300/825 on stock volts.
Temp is good, So do I really need to change them? I only ask because I see loads of threads taking about volt mods and it can save a cards life, can someone give a basic explination of why higher/lower, What situation it can be applied, and If its better I do or not? This is being run 24/7 prob till end of year, What do you think people?
EDIT - also on vista with sdk2.4
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