7950 Sapphire dead

[titolr10]

Hi!
After few days of mining, my 3 of 14 Sapphire 7950 boost edition cards just dead (Even PSU doesnt start, when they are connected).

I dont even try to change voltage. They all work on 1100 engine clock and 1250 memory clock.
The other cards restart system without a reason sometimes.

Is there a possibilty, that i buy cards with defect?

Or this maybe my foult? I think 1100 is not too high..

BR!

[sunszl]

too fast. GPU should be @800.

[titolr10]

I have stable temps ~70C, and everyone in each sites have above 1100 gpu engine.
I dont have AMD driver crash. This could be possible, that i can set engine higher than 1000?

[Prelektro]

https://www.sapphireforum.com/showthread.php?32967-Sapphire-7950-Dual-X-Bios-015-040-000-001-000000-Wth

had the same problem. 3 cards dead, retailer changed them, now using them undervolted at stock clocks. return them if you can and get some other card.

[zackclark70]

I run the same cards at 1050core 1250 mem 1.050v core and get 630-660kh I cant see 50mhz more being an issue as a lot of people run more than 1100mhz

have you made sure its not the motherboard or PSU ?

[Prelektro]

I'm %100 sure there is problem with these new released 7950 sapphires - i had read reports from 2-3 different miners . it's not about motherboard,psu etc. i had sapphires dead on different mobos, psu's in 2 weeks. temperatures seem normal  while mining but there is something getting hot other than core. you better undervolt your cards or they will die 1 by 1 eventually (or simply return them) i'm using my cards at 0.962 V with 925/1250 clocks and getting 560 khash.

[zackclark70]

I'm %100 sure there is problem with these new released 7950 sapphires - i had read reports from 2-3 different miners . it's not about motherboard,psu etc. i had sapphires dead on different mobos, psu's in 2 weeks. temperatures seem normal  while mining but there is something getting hot other than core. you better undervolt your cards or they will die 1 by 1 eventually (or simply return them) i'm using my cards at 0.962 V with 925/1250 clocks and getting 560 khash.

I must have the older ones they have been running 7 months no issues

[titolr10]

Those are 11196-19-20G.

Any stable bioses? Or how to undervolt them? I tried msi afterburn and I can't chage voltage there..

[Prelektro]

i used sapphire trixx, it should work.

[Wipeout2097]

Those are 11196-19-20G.

Any stable bioses? Or how to undervolt them? I tried msi afterburn and I can't chage voltage there..

http://www.techpowerup.com/forums/threads/vbe7-vbios-editor-for-radeon-hd-7000-series-cards.189089/

[Silvano]

i have 1 card 11196-19-20g on my desktop
bios: 015.029.000.002.000000 (113-1E249100-S41)
driver: 13.251.0.0 (cat 13.12)
Win7 64bit

gpu clock 1025
Memory clock 1500

undervolted by TriXX @1100w  it works @1.025V (gpu-z 7.5 data)

I 18, Kh/s 588 stable, no HW err, consumption: 295w at the wall (idle 70w)
I 19, Kh/s 603 stable, no HW err, consumption: 299w
I 20, Kh/s 615 stable, no HW err, consumption: 303w

temp: 73C.
fan 1800 rpm

i use SGminer 4.0.0

hope this data may help you.