R9 280x 4Mh/s Mining Rig

[flasheart]

CGMiner settings to reach that speed on these cards?

page 1, post 19

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[Kergekoin]

n00b here... can someone school me up real fast on PCI-e slots and mining?

• Are all multi-GPU setups implementing ether Crossfire or SIL?

• Does every slot need to be 16x? It seems 1x to 16x risers are being use in some setups.

• If not, is there a theoretical limit on the number of GPUs I can add to a board?

1. No
2. No. 1x provides enough bandwidth.
3. No You can add as many as there is PCIe slots. Windows 8 limit is 8 cards. Theres no board available which has more than 8 slots.

[jedimindtriks]

here is my setup

4x sapphire cards, and 2 asus dc2 cards.

https://i.imgur.com/a3IiFhY.png

2 systems tho, 3 gpus each. 1000watt for each.

1 is amd, with 8gb ram, the other is cheap intel 1155 also with 8gb. (getting a thread conc error with lower ram)

even with those temps, i cannot go higher, because after a few hours at least 1 of them dies and cgminer cocks up and crashes.

the gpus are running 1100-1130, mem is 1800-1820

no voltage increase. and still no risers,

I did notice that putting a fan on top helped alot with temps, and so did an exhaust fan at the back of the cards (it pulls air away from the cards)

settings are close to these ( i often have to adjust the gpu/mem)

"intensity" : "13,13,13",
"vectors" : "1,1,1",
"worksize" : "256,256,256",
"kernel" : "scrypt,scrypt,scrypt",
"lookup-gap" : "2,2,2",
"thread-concurrency" : "8192,8192,8192",
"gpu-engine" : "0-1135,0-1100,0-1135",
"gpu-memclock" : "1815,1795,1815",
"gpu-powertune" : "20,20,20",
"gpu-fan" : "0-100,0-100,0-100",
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "10",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"

[coin@coin]

page 1, post 19

Thanks flasheart!

Got them running fine now on my 6 x 280X GPU RIG (Win 8.1 Preview) with 4x HIS IceQ X2 Boost and 2x Sapphire Toxic = ~4MH/s
Stable like a swiss watch with highest temp at 75C.

[crazyates]

2 PSU's... 1 1200W and 1 1000W

And of course 5x Sapphire Toxic R9 280x  Main Specs:  TC=8193, MEM=1800, Engine=1100

As for length of time, I ran for 5 hours no problems with zero HW errors, I rebooted to remove killawatt voltage meter and post pics.

Unfortunately this speed does come with a price, the cards have to run at 1.256V  I can run at 765Kh/s per card at 1.2V if I lower mem to 1500 and engine to 1100.  This also lowers temps from high 70's to low 70's.

Damn. I've got 5x Gigabyte WF3 280x in a rig. TC 8192, -g 2, 1040/1500, getting 725KH/s. Best part? Undervolted to 1.019V and running off 2 Rosewill 750 Capstone Modular PSUs. Pulls 1250W at the wall (combined). Undervolt FTW!

[24Kilo]

Damn. I've got 5x Gigabyte WF3 280x in a rig. TC 8192, -g 2, 1040/1500, getting 725KH/s. Best part? Undervolted to 1.019V and running off 2 Rosewill 750 Capstone Modular PSUs. Pulls 1250W at the wall (combined). Undervolt FTW!

5xGigabyte Windforce 3Gb??? how are you under-volting? Flashing the bios? To what?

Thanks!

[Bfljosh]

Thank you for this awesome info. I have the same cards running at 813 khash/s now at 79 C.

[flasheart]

Thank you for this awesome info. I have the same cards running at 813 khash/s now at 79 C.

I'm glad I could be of some assistance... Feel free to donate to any of my addresses in my signature 

[skleven]

Thanks for this. Both my Toxic and Vapor-X is now running above the 810kh/s mark. Awsome. 

[Amph]

i can't reach 800 kh/s

i tried 1100/1800 with tc 8193

now i'm at 767 max

maybe because i'm at 1000 mv?

[mrugala]

Thanks for this. Both my Toxic and Vapor-X is now running above the 810kh/s mark. Awsome. 

vapor-x too? :O

[skleven]

Thanks for this. Both my Toxic and Vapor-X is now running above the 810kh/s mark. Awsome. 

vapor-x too? :O

Yep. cgminer 2.11.2 - 1155/1800/Powertune:20/1.2v

3gpus running steady at 815kh/s. 

[Silvano]

Thanks for this. Both my Toxic and Vapor-X is now running above the 810kh/s mark. Awsome.  

vapor-x too? :O

Yep. cgminer 2.11.2 - 1155/1800/Powertune:20/1.2v

3gpus running steady at 815kh/s.  

how watt it uses?

and can you give us code number of yours gpu?
sapphire gets lot of numbers and i never understand what gpu it is, cause i will buy in itali next week and i'm confused....

tnx

[Amph]

Thanks for this. Both my Toxic and Vapor-X is now running above the 810kh/s mark. Awsome.  

vapor-x too? :O

Yep. cgminer 2.11.2 - 1155/1800/Powertune:20/1.2v

3gpus running steady at 815kh/s.  

ok but with 1.2 v it's not worth it at all dude...

better at 750kh/s but for 1050mv

[KlimBo_BG]

Thanks for this. Both my Toxic and Vapor-X is now running above the 810kh/s mark. Awsome. 

vapor-x too? :O

Yep. cgminer 2.11.2 - 1155/1800/Powertune:20/1.2v

3gpus running steady at 815kh/s. 

What about invalid shares? My Toxic mines with 820 kh/s (cgminer 2.11.2) but invalid shares are 30%.

[skleven]

Thanks for this. Both my Toxic and Vapor-X is now running above the 810kh/s mark. Awsome. 

vapor-x too? :O

Yep. cgminer 2.11.2 - 1155/1800/Powertune:20/1.2v

3gpus running steady at 815kh/s. 

What about invalid shares? My Toxic mines with 820 kh/s (cgminer 2.11.2) but invalid shares are 30%.

My toxic show 1024 rejected out of 424651. Mining UFO. That`s not bad.
But for the tocix i`m running cgminer 3.4.2. 1130/1850/i13

[Maurizio]

Hello

I habe saphire dual x 2 r9280x, get 730kh/s each.
I tried your settings but wont work, could somebody
who got the 800+ post the whole congif line outta cgminer, please.

best regards form switzerland

[skleven]

Hello

I habe saphire dual x 2 r9280x, get 730kh/s each.
I tried your settings but wont work, could somebody
who got the 800+ post the whole congif line outta cgminer, please.

best regards form switzerland

I don`t think there ever have been any Dual-X near the 800kh/s mark.
I manage to get 745-750kh/s out of my Dual-X`s. (1055/1500/PT20/i13/cgminer 3.4.2)

[Maurizio]

Hello

I habe saphire dual x 2 r9280x, get 730kh/s each.
I tried your settings but wont work, could somebody
who got the 800+ post the whole congif line outta cgminer, please.

best regards form switzerland

I don`t think there ever have been any Dual-X near the 800kh/s mark.
I manage to get 745-750kh/s out of my Dual-X`s. (1055/1500/PT20/i13/cgminer 3.4.2)

Thank, I hope somebody else know a sweetspot for dual x?
Whats the best r9 280x for mining out there?

[crazyates]

Damn. I've got 5x Gigabyte WF3 280x in a rig. TC 8192, -g 2, 1040/1500, getting 725KH/s. Best part? Undervolted to 1.019V and running off 2 Rosewill 750 Capstone Modular PSUs. Pulls 1250W at the wall (combined). Undervolt FTW!

5xGigabyte Windforce 3Gb??? how are you under-volting? Flashing the bios? To what?

Thanks!

VBE7. Wonderful utility.