7970's getting under 700Kh/s Scrypt?

[Spetznaaz]

Well seeing as i'm trying to get out of noob status, if anyone here has an under performing 7970, let me know, and i'll tell you how to get it hopefully up to 700+

Vapor-x ghz are my speciality, can get them up to 730 Kh/s under volting and under clocking, 60C

[notaek]

I have 2 7970's, one that can reach 660 and then another that only gets 600.  If you actually get em both above 700 I just might have some LTC for you…

[Spetznaaz]

I shall do my best good sir

First i need a bit of info:

 What are the exact make/models of both cards?

What is your intensity, -g and thread concurrency set to?
 
Are you doing setx GPU_MAX_ALLOC_PERCENT 100 in a cmd window before running cgminer, then closing it, then opening a new cmd for cgminer?

What are your clock and voltage settings?

[optimator]

Sweet! I don't know how to tell the exact make. It's a raedon with a sticker that says vision tek.

g=2 and thread concurrency=2288

1100 / 1600 for engine memory and I=13

I'm getting  540 kh/s

Thanks!

[notaek]

I shall do my best good sir

First i need a bit of info:

 What are the exact make/models of both cards?

What is your intensity, -g and thread concurrency set to?
 
Are you doing setx GPU_MAX_ALLOC_PERCENT 100 in a cmd window before running cgminer, then closing it, then opening a new cmd for cgminer?

What are your clock and voltage settings?

I am doing xset.  My cards are both Gigabyte, one is a GHz edition, other one is regular.  The GHz edition gets 660 at 1000core and 1500mem and the reguler one gets 600 at 900core and 1540 mem  I have the intensities at 20.  The thread concurrency is set to 20992 for both of them.  

[Spetznaaz]

I shall do my best good sir

First i need a bit of info:

 What are the exact make/models of both cards?

What is your intensity, -g and thread concurrency set to?
 
Are you doing setx GPU_MAX_ALLOC_PERCENT 100 in a cmd window before running cgminer, then closing it, then opening a new cmd for cgminer?

What are your clock and voltage settings?

I am doing xset.  My cards are both Gigabyte, one is a GHz edition, other one is regular.  The GHz edition gets 660 at 1000core and 1500mem and the reguler one gets 600 at 900core and 1540 mem  I have the intensities at 20.  The thread concurrency is set to 20992 for both of them.  

Strange thing is, i would of expected you to get less on the GHz edition - It's usually the Ghz editions that underperform.

Ok first of all, try these settings:

Core voltage 1062
Core clock 1043
Memory clock 1500
Memory voltage 1500

and: --thread-concurrency 8192 -I 13 -w 256 -g 2

Let me know your hashrate, if that doesn't work, we'll move on to the next step which is almost certain to work

Edit - If one of the cards is connected to a monitor, i find you need to increase the core voltage to keep everything stable.

[Spetznaaz]

Sweet! I don't know how to tell the exact make. It's a raedon with a sticker that says vision tek.

g=2 and thread concurrency=2288

1100 / 1600 for engine memory and I=13

I'm getting  540 kh/s

Thanks!

Also try the settings i just posted, report back your hashrate.

Don't forget to set gpu max allocation the way i said.

I'm not too sure about the vision tek ones tbh, but i will try my best to help. Do you know if it's a Ghz edition or anything?

[Andj]

My 7970 running tooooooooooooooooo hot, always reach 96C, 

[Spetznaaz]

My 7970 running tooooooooooooooooo hot, always reach 96C, 

Jesus mine run at 60-70C.. what card do you have?

[Xanthe]

I have two Sapphire 7970s, both running at ~660Kh/s. Settings are as follows:

Code:

setx GPU_MAX_ALLOC_PERCENT 100
cgminer --scrypt --intensity 13 --shaders 2048 --worksize 256 --thread-concurrency 8192 -g 2

I know, the shaders option is redundant. ;P

I'm using the Catalyst 13.3 Beta drivers (same performance as 13.1, haven't tried 13.4+). Clocks are 971mhz core and 1428mhz memory, 1063mV core voltage. I can almost achieve 700Kh/s with clocks 1018core/1498mem but things get a little too hot for my liking (the room they're in is not air-conditioned). Any memory clock over 1500mhz decreases Kh/s significantly for me. The .68 core/mem clock ratio seems to work the best in all of my testing. I don't think I can do any better without overclocking more. Just figured I'd put this out here for anyone interested.

[Andj]

My 7970 running tooooooooooooooooo hot, always reach 96C, 

Jesus mine run at 60-70C.. what card do you have?

Some sh*t named HIS, i have to lower the GPU core speed, still got 85-90, damn 

[dan7733]

Hi Guys!

I'm currently in the market for a 7970 for mining. On the MHC wiki, some 7970's can go around 750 MH/s, but after browsing many forums, people seem to be frequently having trouble with 7970s, resulting in speeds closer to 500 MH/s.

So, which 7970 is currently the best to get?
(I'm looking mainly at cards with NON-reference coolers, and an unlocked voltage is good to overclock and get more MH/s!)

Also, do any of you have the 7970? If so, which brand, and what speeds are you looking at?

Thanks a lot guys!

-Dan

[Spetznaaz]

Hi Guys!

I'm currently in the market for a 7970 for mining. On the MHC wiki, some 7970's can go around 750 MH/s, but after browsing many forums, people seem to be frequently having trouble with 7970s, resulting in speeds closer to 500 MH/s.

So, which 7970 is currently the best to get?
(I'm looking mainly at cards with NON-reference coolers, and an unlocked voltage is good to overclock and get more MH/s!)

Also, do any of you have the 7970? If so, which brand, and what speeds are you looking at?

Thanks a lot guys!

-Dan

I would recommend the Sapphire 7970 Vapor-x Ghz. It has very good cooling, will get you 730 Kh/s scrypt undervolted and underclocked, you could push more out of it with tweaking.

You have to flash one of the bios's but it's a piece of piss. I got two happily mining away at 1.45 Mh/s avr right now

Anyways bed time for me, i will try and help anyone who need it tomorrow.

[Xanthe]

I'm currently in the market for a 7970 for mining. On the MHC wiki, some 7970's can go around 750 MH/s, but after browsing many forums, people seem to be frequently having trouble with 7970s, resulting in speeds closer to 500 MH/s.

I think the most common problem for those stuck around ~500Kh/s is not using the "-g 2" option in cgminer. I was stuck around there until I figured it out. A lot of the configurations that people post around mining forums are for 7950s which seem to work better with "-g 1" (the default, I believe) but higher intensities.

So, which 7970 is currently the best to get?
(I'm looking mainly at cards with NON-reference coolers, and an unlocked voltage is good to overclock and get more MH/s!)

I'm very happy with my Sapphire cards and the general consensus seems to be that Sapphire has among the best cards. All of my Sapphires (7950 and 7970) have unlocked voltage. My cards all have the "Dual-X" cooler with a large heatsink and two big fans. It seems to work reasonably well but I wouldn't attempt to put more than one of these cards in/on a system without PCI-E risers (because of the cooler, the card takes up 3 slots).

Also, do any of you have the 7970? If so, which brand, and what speeds are you looking at?

See above.

[dan7733]

Thanks for the info guys!
I think I'll look into the sapphire...

Also, any thoughts on the gigabyte windforce3 (1ghz edition and the 1.1ghz edition) and the xfx double d ghz edition? (1050 mhz)

I've also heard that most msi cards are unlocked.....

[dcc]

Thanks for the info guys!
I think I'll look into the sapphire...

Also, any thoughts on the gigabyte windforce3 (1ghz edition and the 1.1ghz edition) and the xfx double d ghz edition? (1050 mhz)

I've also heard that most msi cards are unlocked.....

I have a 7870 OC Gigabyte Windforce3, the coller is real good and silent, the card do 370 average with 420 tops on scrypt, good card and very silent.

[astralvoid]

I have 2 x standard Gigabyte 7970, etc and can get 750K/hash per card at 80-85C temps.  I lower it to 718k/hash to keep temps below 79C

[bitcoindude80]

I have 2 x standard Gigabyte 7970, etc and can get 750K/hash per card at 80-85C temps.  I lower it to 718k/hash to keep temps below 79C

what is your setting? I can only get it to go up 700kh/s without crashing.

Thanks

[mine2mind112]

U have to undervolt the card for keep temp lower.....the default 1.170 is realy too mutch....

[kgains]

Also, any thoughts on the gigabyte windforce3 (1ghz edition and the 1.1ghz edition) and the xfx double d ghz edition? (1050 mhz)

Well, I have the Windforce 7950 GHz (GV-R795WF3-3GD). Not that impressed. The GHz BIOS was crazy (default 1.25V) but I was able to force the older F43 (fairly safe since it has dual BIOS but to use ATIWinflash the card cannot be the primary). But that still locks the voltage at 1.09V which while it is okay up to 1100MHz for me, is not ideal since for ~1000MHz I think 1.05V or even 1.00V should be possible and would save me few watts plus run cooler.

The other negative with the Winforce 7950 (unsure about the 7970) is that Gigabyte skimped and didn't equip with a good monitoring chip so no info on VRM temps, GDDR5 voltages etc. - just vcore, core temp and fan speed.

Cooler are good though and no sign of any coil whine.