SAVE money - undervolting 7970 XFX, self made VBE7 bios = TABLE OF CONTENTS = - page 2.

jjj0923

sr. member

Activity: 266

Merit: 250

Quote from: virtualreality69 on April 06, 2014, 02:38:39 PM

I'm not sure who you're refereing to, but I run VBE7 in regular old windows (not dos mode). The Actual flashing of the Bios is done in DOS mode. I use ATIflash, which from what I read is THE best method out there.

Cheers,
- VR

Quote from: jjj0923 on April 06, 2014, 09:19:23 AM

how do you get vb37 to run in dos mode?

I created a bootable dos stick, backed up my bios and when I tried to run the lastest version of vbe7 it said : cannot be run in DOS mode....

hmmmm

thanks = must have had a brain fart this morning - forgot I could go back to my pc and edit the rom file there using VBu7 then take it back to my miner and upload the modified rom file.

virtualreality69

full member

Activity: 125

Merit: 100

Check out FireCoin!

I'm not sure who you're refereing to, but I run VBE7 in regular old windows (not dos mode). The Actual flashing of the Bios is done in DOS mode. I use ATIflash, which from what I read is THE best method out there.

Cheers,
- VR

Quote from: jjj0923 on April 06, 2014, 09:19:23 AM

how do you get vb37 to run in dos mode?

I created a bootable dos stick, backed up my bios and when I tried to run the lastest version of vbe7 it said : cannot be run in DOS mode....

hmmmm

jjj0923

sr. member

Activity: 266

Merit: 250

how do you get vb37 to run in dos mode?

I created a bootable dos stick, backed up my bios and when I tried to run the lastest version of vbe7 it said : cannot be run in DOS mode....

hmmmm

virtualreality69

full member

Activity: 125

Merit: 100

Check out FireCoin!

Oh snap, I forgot the 750ti is TINY at just 6.7 x 1.5 x 4.4 inches and no additional pci-e power needed.

This could yield some sick new rig builds. Anyone got an uber small foot-print 6 x 750ti build? Post pics or PM me please, I'd love to see them!

virtualreality69

full member

Activity: 125

Merit: 100

Check out FireCoin!

Quote from: daynomate on March 06, 2014, 04:57:50 AM

nvidia GTX 750 Ti - people are reporting 250khash from only 28W and 300khash from 38W

I'd like to see proof of 250kh/s on < 30 watts. Pic (or reliable source) or it didnt happen.

Quote from: flowerpots on March 18, 2014, 10:36:58 AM

Quote from: drakoin on March 15, 2014, 06:24:41 AM

Quote from: flowerpots on March 14, 2014, 11:45:29 AM

Quote from: drakoin on March 13, 2014, 12:52:58 PM

Quote from: daynomate on March 06, 2014, 04:57:50 AM

nvidia GTX 750 Ti - people are reporting 250khash from only 28W and 300khash from 38W

Wow, that would be 8-9 khash/Watt, so 2-3 times better than ATI. Almost as little as the GRID asics.
And the card costs less than 200 dollars? I have no experience with Nvidia cards, and the 750 Ti is not yet in the hardware comparison list. Does anyone actually know about such a list with also all the Watt consumption values?
Please post more such information. Thx.

I just ordered 2 of those GTX 750 Ti's. Will get them next week. If anyone wants to play with them on teamviewer: let me know!

I did read that 265 khash on 28W was possible with CudaMiner. Can't wait to put 5 of those in my rig! Grin

Cool. Looking forward to seeing your results!
Do you own a wattmeter? If not, get one now, they are cheap.
I don't trust the internal power sensors, please measure the Watt differences on the wall plug (between: no card, card disabled, card full power)

thx

Just inserted them on my motherboard. Both cards do around 260 khash on cudaminer.

My system with 2 cards in idle: 75W.
Both cards full power: 200W.

So each cards around 62/63W and getting 260khash/s.

Edit: I tried to run it with 1 card:
My system with 1 card in idle: 62W.
1 card full power: 128W.

Wipeout2097

sr. member

Activity: 840

Merit: 255

SportsIcon - Connect With Your Sports Heroes

Quote from: drakoin on March 19, 2014, 04:10:34 PM

Why do you say "even worse scrypt-N" ? I thought scrypt-N is ASIC resistant?

No, I mean in the sense of scrypt-n using more power than scrypt. Now, I have no data to back up my claim, and it was a bit of apples and oranges, but vertcoin lead my cards to higher temperatures.

drakoin

hero member

Activity: 826

Merit: 1000

see my profile

about undervolting: http://ultracoin.net/undervolt.html

hex editor BIOS modifications - might be interesting for you if VBE7 doesn't help with your card.

drakoin

hero member

Activity: 826

Merit: 1000

see my profile

Quote from: Wipeout2097 on March 17, 2014, 03:19:05 PM

Drakoin, in all honesty, scrypt PoW is a dead-end for the ones like us that pay through the nose for electricity, specially after ASICs and multipools.
Alongside with undervolting, it's actually interesting to look at coins that do not use scrypt or even worse scrypt-N.

To look at it from another angle: Now with the low profitability it is more important than ever to save electricity.

It was still not a dead-end, when I started in December, but by now - I agree with you. A sad story it has become with scrypt coins on GPUs.

Why do you say "even worse scrypt-N" ? I thought scrypt-N is ASIC resistant?

I tried vertcoin for quite a while, but never published my settings & measurements, sorry. And now the price is uninterestingly low.
Also tried ultracoin, and published my settings and measurements here in this thread, and in the ultracoin thread.

So yes, let's move on! Optimistic: Hey, what we've learnt here with scrypt ... will help us with other coin systems.

Which are interesting coins systems to look at, and optimize our cards for?

lordshawk

newbie

Activity: 14

Merit: 0

Quote from: lordshawk on March 18, 2014, 09:37:16 AM

Updated by bios' again. Dropped the voltage on one card to 1.0v flat. (812/1375) .. 560khs. Powertuned -20.

The other 710khs, powertune 0 (-20 takes it to 610khs).. 1.125v (1024/1735)

in both cases powertune +20 helps nothing.

https://i.imgur.com/EA6GQqh.png

Should mention also that I use a thread concurrency of 10240 and -g 2

Keeping with a 0.59 ratio. I increased the cpu/mem clocks from 1024/1735 to 1060/1795. Kept the same voltage of 1.125 and boosted the powertune to +20. Now hashing away at 735+ khs. Incredible. To think I was running this at 1.256 and barely scratching 700. The GHZ reference bios is great. All it needed was to be tweaked down. Hashed all day with 1024/1735. Will continue hashing at 1060/1795 and see where it takes me.

flowerpots

full member

Activity: 205

Merit: 100

Quote from: drakoin on March 15, 2014, 06:24:41 AM

Quote from: flowerpots on March 14, 2014, 11:45:29 AM

Quote from: drakoin on March 13, 2014, 12:52:58 PM

Quote from: daynomate on March 06, 2014, 04:57:50 AM

nvidia GTX 750 Ti - people are reporting 250khash from only 28W and 300khash from 38W

Wow, that would be 8-9 khash/Watt, so 2-3 times better than ATI. Almost as little as the GRID asics.
And the card costs less than 200 dollars? I have no experience with Nvidia cards, and the 750 Ti is not yet in the hardware comparison list. Does anyone actually know about such a list with also all the Watt consumption values?
Please post more such information. Thx.

I just ordered 2 of those GTX 750 Ti's. Will get them next week. If anyone wants to play with them on teamviewer: let me know!

I did read that 265 khash on 28W was possible with CudaMiner. Can't wait to put 5 of those in my rig! Grin

Cool. Looking forward to seeing your results!
Do you own a wattmeter? If not, get one now, they are cheap.
I don't trust the internal power sensors, please measure the Watt differences on the wall plug (between: no card, card disabled, card full power)

thx

Just inserted them on my motherboard. Both cards do around 260 khash on cudaminer.

My system with 2 cards in idle: 75W.
Both cards full power: 200W.

So each cards around 62/63W and getting 260khash/s.

Edit: I tried to run it with 1 card:
My system with 1 card in idle: 62W.
1 card full power: 128W.

lordshawk

newbie

Activity: 14

Merit: 0

Updated by bios' again. Dropped the voltage on one card to 1.0v flat. (812/1375) .. 560khs. Powertuned -20.

The other 710khs, powertune 0 (-20 takes it to 610khs).. 1.125v (1024/1735)

in both cases powertune +20 helps nothing.

https://i.imgur.com/EA6GQqh.png

Should mention also that I use a thread concurrency of 10240 and -g 2

lordshawk

newbie

Activity: 14

Merit: 0

Drakoin dude your work has inspired me.

have a couple shitty HIS 7970 reference cards that arent totally reference. Cant seem to hash over 570 (925/1375) on one and 710 (1024/1750) on the other.

Anyways I was running both with powertune +20, the 710 had 4500rpm fan speed at 1.256v while the 570 was taking 1.17v stock.

the 570 card is still hashing at 570 but at (812/1375 mhz) and a cool 1.025v with a powertune -20 .. fan is at 43% (2700 rpm). I might try and lower the v more but going to pick up a killawatt meter and give it a scan.

the 710 card is now hashing at 610 but at (885/1500 mhz) and a lower 1.200V with a powertune -20.. fan at 49% (3200rpm).

Will get the meter and post my results.. very interested in knowing the benefit and if I can maximize that spread further.

Amgclk65

newbie

Activity: 34

Merit: 0

Now i need to get 6 r9 270 under bolted a bit better.
1000 from the wall.

https://i.imgur.com/AhWNPfM.png

Amgclk65

newbie

Activity: 34

Merit: 0

[/quote]

What settings did you use for this?

575w for both cards including the MOBO and peripherals?

[/quote]
Im running 1050 engine clock and 1500 memory.
with seminer. the 575 was the whole system.
psu: evga 750 gold
chip: intel g 1830 lga 1150
mobo: msi z87m-g43
drive: 2.5 sata 3 320gb

Amgclk65

newbie

Activity: 34

Merit: 0

Quote from: drakoin on March 17, 2014, 03:00:32 PM

Quote from: Amgclk65 on March 15, 2014, 02:59:25 PM

Hey fellow miners. Ive got a question about one of my rigs.
Its a gigabyte 7970 and his r9 280x. both are undervolted drawing 575 from the wall on a gold psi unit. do you guys think there's more room for undervolting
and keeping roughly 700 kh/s?

Your temperatures are high.

I get about 1513 khash, so about 4% more than you.
BUT I use only 516 Watts incl. everything, you use 11% more electricity than me.

However, of course, I had to invest 87 Euros more into my 2nd hand 7850.
Depending on the electricity prices sooner or later - but one day I will be better off :-)

I live in a super hot climate. i need to work on the temps.

I added a 7870 to the mix. undervolted to 1.030 as well. its seems like 1.030 is the the lowest for one gar and 1.060 for another at 1050 engine 1500 memory.
715 from the wall now
https://i.imgur.com/IyTRHQ7.png

Wipeout2097

sr. member

Activity: 840

Merit: 255

SportsIcon - Connect With Your Sports Heroes

Drakoin, in all honesty, scrypt PoW is a dead-end for the ones like us that pay through the nose for electricity, specially after ASICs and multipools.

Alongside with undervolting, it's actually interesting to look at coins that do not use scrypt or even worse scrypt-N.

drakoin

hero member

Activity: 826

Merit: 1000

see my profile

Quote from: Amgclk65 on March 15, 2014, 02:59:25 PM

Hey fellow miners. Ive got a question about one of my rigs.
Its a gigabyte 7970 and his r9 280x. both are undervolted drawing 575 from the wall on a gold psi unit. do you guys think there's more room for undervolting
and keeping roughly 700 kh/s?

Your temperatures are high.

Thanks for your posting, it allows an interesting comparison, because our khash are almost the same:

I run two 7970 (that's like your two cards)
and one 7850.

But in much lower clockspeeds, voltage and thus lower temperature. See posting #37 of this thread.

I get about 1513 khash, so about 4% more than you.
BUT I use only 516 Watts incl. everything, you use 11% more electricity than me.

However, of course, I had to invest 87 Euros more into my 2nd hand 7850.
Depending on the electricity prices sooner or later - but one day I will be better off :-)

> do you guys think there's more room for undervolting
> and keeping roughly 700 kh/s?

Just try it. Lower the voltage, until your system crashes,
then go up until you get a stable system.

Mk2vr6

full member

Activity: 196

Merit: 100

Quote from: Amgclk65 on March 15, 2014, 02:59:25 PM

Hey fellow miners. Ive got a question about one of my rigs.
Its a gigabyte 7970 and his r9 280x. both are undervolted drawing 575 from the wall on a gold psi unit. do you guys think there's more room for undervolting
and keeping roughly 700 kh/s?

What settings did you use for this?

575w for both cards including the MOBO and peripherals?

Amgclk65

newbie

Activity: 34

Merit: 0

Hey fellow miners. Ive got a question about one of my rigs.
Its a gigabyte 7970 and his r9 280x. both are undervolted drawing 575 from the wall on a gold psi unit. do you guys think there's more room for undervolting
and keeping roughly 700 kh/s?

drakoin

hero member

Activity: 826

Merit: 1000

see my profile

Quote from: flowerpots on March 14, 2014, 11:45:29 AM

Quote from: drakoin on March 13, 2014, 12:52:58 PM

Quote from: daynomate on March 06, 2014, 04:57:50 AM

nvidia GTX 750 Ti - people are reporting 250khash from only 28W and 300khash from 38W

Wow, that would be 8-9 khash/Watt, so 2-3 times better than ATI. Almost as little as the GRID asics.
And the card costs less than 200 dollars? I have no experience with Nvidia cards, and the 750 Ti is not yet in the hardware comparison list. Does anyone actually know about such a list with also all the Watt consumption values?
Please post more such information. Thx.

I just ordered 2 of those GTX 750 Ti's. Will get them next week. If anyone wants to play with them on teamviewer: let me know!

I did read that 265 khash on 28W was possible with CudaMiner. Can't wait to put 5 of those in my rig! Grin

Cool. Looking forward to seeing your results!
Do you own a wattmeter? If not, get one now, they are cheap.
I don't trust the internal power sensors, please measure the Watt differences on the wall plug (between: no card, card disabled, card full power)

thx

Topic: SAVE money - undervolting 7970 XFX, self made VBE7 bios = TABLE OF CONTENTS = - page 2. (Read 56567 times)