Undervolting 7870s | Bitcointalksearch.org

induktor

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Quote from: Wipeout2097 on January 31, 2014, 03:21:18 PM

Quote from: induktor on January 31, 2014, 01:11:51 PM

Quote from: Wipeout2097 on January 31, 2014, 12:59:16 PM

Quote from: grache on January 31, 2014, 02:30:02 AM

I've got several Saphire OC 7870s ( http://www.amazon.com/gp/product/B00A2J4ROE/ref=oh_details_o00_s02_i00?ie=UTF8&psc=1 )

I'd like to undervolt them, while there's a bunch of info in undervolting 79xx, I haven't found much related to 78xx. My first concern is increasing the life of the cards, and second saving a little power. Unlike other cards, I haven't been able to find a BIOS switch, I'm pretty sure they don't have one. I'm little concerned about bricking them.

Outside of general undervolting advice from tutorials like cryptobadgers, does anyone have any advice?

Well, you can try VBE7 the same way.

Correct me if i am wrong, but he has pitcairn series cards, and as far as i know VBE7 is for Tahiti and up.

I actually used VBE7 for Pitcairn cards, namely a VTX3D 7870 and 2 Gigabyte R9-270 OC. Works the same.

I didn't knew that!!!!, that is fucking awesome, thank you for the information, I have a friend with a great deal of 7850s that will be very happy with that info

Wipeout2097

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Quote from: induktor on January 31, 2014, 01:11:51 PM

Quote from: Wipeout2097 on January 31, 2014, 12:59:16 PM

Quote from: grache on January 31, 2014, 02:30:02 AM

I've got several Saphire OC 7870s ( http://www.amazon.com/gp/product/B00A2J4ROE/ref=oh_details_o00_s02_i00?ie=UTF8&psc=1 )

I'd like to undervolt them, while there's a bunch of info in undervolting 79xx, I haven't found much related to 78xx. My first concern is increasing the life of the cards, and second saving a little power. Unlike other cards, I haven't been able to find a BIOS switch, I'm pretty sure they don't have one. I'm little concerned about bricking them.

Outside of general undervolting advice from tutorials like cryptobadgers, does anyone have any advice?

Well, you can try VBE7 the same way.

Correct me if i am wrong, but he has pitcairn series cards, and as far as i know VBE7 is for Tahiti and up.

I actually used VBE7 for Pitcairn cards, namely a VTX3D 7870 and 2 Gigabyte R9-270 OC. Works the same.

induktor

hero member

Activity: 710

Merit: 502

Quote from: Wipeout2097 on January 31, 2014, 12:59:16 PM

Quote from: grache on January 31, 2014, 02:30:02 AM

I've got several Saphire OC 7870s ( http://www.amazon.com/gp/product/B00A2J4ROE/ref=oh_details_o00_s02_i00?ie=UTF8&psc=1 )

I'd like to undervolt them, while there's a bunch of info in undervolting 79xx, I haven't found much related to 78xx. My first concern is increasing the life of the cards, and second saving a little power. Unlike other cards, I haven't been able to find a BIOS switch, I'm pretty sure they don't have one. I'm little concerned about bricking them.

Outside of general undervolting advice from tutorials like cryptobadgers, does anyone have any advice?

Well, you can try VBE7 the same way.

Correct me if i am wrong, but he has pitcairn series cards, and as far as i know VBE7 is for Tahiti and up.

Wipeout2097

sr. member

Activity: 840

Merit: 255

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Quote from: grache on January 31, 2014, 02:30:02 AM

I've got several Saphire OC 7870s ( http://www.amazon.com/gp/product/B00A2J4ROE/ref=oh_details_o00_s02_i00?ie=UTF8&psc=1 )

I'd like to undervolt them, while there's a bunch of info in undervolting 79xx, I haven't found much related to 78xx. My first concern is increasing the life of the cards, and second saving a little power. Unlike other cards, I haven't been able to find a BIOS switch, I'm pretty sure they don't have one. I'm little concerned about bricking them.

Outside of general undervolting advice from tutorials like cryptobadgers, does anyone have any advice?

Well, you can try VBE7 the same way.

induktor

hero member

Activity: 710

Merit: 502

Those cards, afaik, cannot be undervolted.

voltage control is locked from hardware, the only way to do it is with a hardware mod (essentially what you do, is make the card believe it is working at, let's say 1.5V, when really the card is at 1.2V, by faking the voltage sensing signal that goes into the controller) of course that changes from brand to brand with different controllers so it is not an easy thing to do, and if you don't know very well what are you doing, and have the proper instruments, you can pretty much destroy the card.

if you have enough 7870 identical cards (let's say, over 5 or 6, it may worth the risk doing it) otherwise i wouldn't mind, because it will end up being more trouble than it worth.

grache

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Activity: 14

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I've got several Saphire OC 7870s ( http://www.amazon.com/gp/product/B00A2J4ROE/ref=oh_details_o00_s02_i00?ie=UTF8&psc=1 )

I'd like to undervolt them, while there's a bunch of info in undervolting 79xx, I haven't found much related to 78xx. My first concern is increasing the life of the cards, and second saving a little power. Unlike other cards, I haven't been able to find a BIOS switch, I'm pretty sure they don't have one. I'm little concerned about bricking them.

Outside of general undervolting advice from tutorials like cryptobadgers, does anyone have any advice?

Topic: Undervolting 7870s (Read 879 times)