|
Title: 7950 problem ! [solved] Post by: mig91 on April 13, 2013, 03:28:03 PM so i bought 4x vtx7950s to my litecoin mining rig and everything was fine until i see them power usage... my whole 4x7950 rig eats ~1300watt @ c935/m1300/v.stock. (stock clocks are c930/m1250) and they are voltage locked!
so are bios changing the only way to unlock voltage control ? what vga bios you recommend ? i really want the cards eating less than 300w each :P edit. 7950 bios list: http://www.techpowerup.com/vgabios/index.php?page=1&architecture=ATI&manufacturer=&model=HD+7950&interface=&memSize=0 Title: Re: 7950 problem ! Post by: Gator-hex on April 13, 2013, 03:34:11 PM Try turning the memory clock down and see if that helps.
Title: Re: 7950 problem ! Post by: mig91 on April 13, 2013, 03:59:47 PM Try turning the memory clock down and see if that helps. i tryed c910/m1050. still eating 270w per card and hashing only 433kh hmm i really need unlock that v. control, but how ?? Title: Re: 7950 problem ! Post by: mig91 on April 13, 2013, 06:45:54 PM problem solved. thanks to sapphire trixx !
Title: Re: 7950 problem ! [solved] Post by: superfastkyle on April 13, 2013, 07:51:28 PM You must have one of the 7950's that defaults to 1.25v. Yea you can probably just undervolt with trix but a better solution is a 7970 bios. I have the HIS IceQ 7950 I used the bios from the HIS IceQ x2 7970. I assume you probably can use any reference 7970 bios if yours is a reference 7950 otherwise you probably need to stick with the same brand if its a non-reference. Power usage is around 170w now per card, instead of 250w.
Title: Re: 7950 problem ! [solved] Post by: mig91 on April 13, 2013, 09:26:22 PM You must have one of the 7950's that defaults to 1.25v. Yea you can probably just undervolt with trix but a better solution is a 7970 bios. I have the HIS IceQ 7950 I used the bios from the HIS IceQ x2 7970. I assume you probably can use any reference 7970 bios if yours is a reference 7950 otherwise you probably need to stick with the same brand if its a non-reference. Power usage is around 170w now per card, instead of 250w. im happy with trixx. i undervolted and little overclocked cards and i made -300w in power usage. now that rig is pulling about 980w :) gonna fix it some more tomorrow |