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So I'm the proud new parent of my latest mining rig creation... what better way to celebrate then with photos  ;D

Hope you enjoy.

http://i206.photobucket.com/albums/bb251/flashrt/4Mhs_zps881cbb6f.jpg

Specs are in post #19 Below.

If these help you or you need custom help please PM me, I'll see what I can do.

I do accept donations BTW, share the love... Addresses are in my signature.

wow, the sapphire 280x toxic?

806!?

daaaaaaaaaaaaaaaaaaaaaaaamn

Looks good. What are the temps like when you run it for longer than 4 minutes ?

Cgminer config ? Gpu manufacturer?

mmm shiny!

Would love to know your settings as well.  I have some Sapphire 280x cards on the way.
Thanks.

what is your sets  ::)

Can you write what is in this rug? Mobo psu cpu all of this.
Itz sooo beauty :D

I can get my gigabyte r9 280s to around 740 each with no OC.

But, this is good news if he shares his cgminer details and OC settings!

Cant get over 710 on wf3 even less on battlefield editions

Might get a hint from the 'sapphire' name across the top of the cards  ;)




Very nice OP, very nice.

i've seen ads for that rig holder or the frame or whatever.. damn that looks nice. gettin one now :)

Its heavily overclocked. Most cards memory limits them hitting 800s. Need to be clocked around 1800-1900.
Its not very efficent way, but surely put cards on its limits.

https://litecoin.info/Mining_hardware_comparison

sapphire toxic

where can I buy that case?

Since I knew people would ask... The frame is just 1inch square aluminum tube rived together with some flat / angled aluminum... stole some ideas from other people's rigs... total cost $50 plus $20 for a rivet gun I didn't own.

I decided to use my desktop MB / CPU / Memory and upgrade my main system with something new, so what is pictured in this rig is a:

Asus Maximus IV Extreme (has 12v GPU power on MB)
Sandybridge i7 processor
16GB Ram
Watercooled CPU

All of that is overkill, but I just pulled it from my desktop so meh...

Of interesting note, I had to use 16x to 16x risers on 2 of the slots or Windows wouldn't recognize the cards, I don't know why, but it is what it is.  1x to 16x risers on the other 3.

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.

There are my secrets guys... took me weeks to tune these boys, but Toxics are best IMHO... now watch them go out of stock again.   ::)

how were you able to get all the gpu's it seems everywhere I look for cards they have a max of 1/customer

how many watts total?

shopblt.com doesn't have limits.  I ordered a batch of them that are due to ship on Friday.

Beautiful setup!!

That's really awesome...  :o

speed to daaaaaaaaaaaaaaaaaaa moon :D

I seen the openrigs cases before I built mine.. I decided to place the rear aluminum bar low as to support the underside of the GPU's.  I also riveted instead of using connectors.

That said I probably would have purchased from openrigs but I didn't want to wait for shipping.

Can you share the settings you are using?  My gigabyte 280x is not OC as well, but I am only getting 650-700kh avg.

[/quote]

how many watts total?
[/quote]

How long did it take for you to get your case from them?  I've been waiting a week and a half for 2 gorginas.

Newegg has a deal on r9 290's, buy two XFX cards for 949.  I just bought 6 for 3100$

GREAT¡¡¡¡

I have two R9 280X OC DUAL-X at 600 kh/s each

power 1100 w +80 plus

8 GB RAM

 -I 13 -g 2 -w 256 --thread-concurrency 8192 --gpu-powertune 20 --gpu-engine 1010  --gpu-memclock 1495  --auto-fan --temp-target 80 --temp-cutoff 90


I am selling it on ebay.

I want to buy  7950 x4

and mount them here
http://i42.tinypic.com/2dgoozd.jpg

I think it will be more efficient in electric costs .

You got issues.  I have 3x r9 280x's, averaging 715-730Khps, 4G ram, and I'm only using 850-900 Watts, with slight overclocks.

thx , I'll check everything

I have the drivers 13.11 beta and sdk 2.9

What overlock you done?

1100 core at least, or you won't reach 750 ever

reserved

You should just change the gpu-memclock to 1500 and keep the cards. It will pop up to 700+ @ 1500.

Interested in your total watt usage as well. When I saw your topic last week I pre-ordered 4 Toxics, but then started doubting if I could run 4 of them on the 1200W Corsair PSU that I already had, after reading the heavy load usage figures in several reviews. Eventually went for 4 x Dual-X, only got 2 installed at the moment because I'm waiting for my riser cables, pulling 615W at the moment for the system getting 750kh/s on each card. Seems I'll safely make it under the 1200W anyway.

Lovely setup! What monitor program is that ?

Based on my rig readings with a 90% efficent PSU.

4x 280x @ 1080/1500 1125mv = 1190W from the wall. 750-755khs per card.
4x 280x @ 1030/1500 1075mv = 1050W from the wall. 715-720khs per card.
4x 280x @ 1000/1500 1037mv= 970W from  the wall. 695-705khs per card.

I assume he runs 800khs per card @ around 1160/1800 1120-1125mv. This should pull approximately 1550-1650w from the wall.

what 280x?

Nice settings man!

Atm I'm running 2x Sapphire R9 280x at ~705 Kh each

I bought a 3rd one and waiting for it to arrive.

My PSU actually is a Corsair AX 860W 80 Plus Platinum....I'll be able to run the 3x Sapphire R9 280x with this one? Without overclocking of course.

If you undervolt your cards from stock then i see no problem. AX PSUs are grazy good. I run 3 cards @ 1030/1500 1075mv with AX760 on one of my diggers. It doesnt even sweat.

Those are some sexy fucking cards right there. I've had my eye on the 290 versions, but they're never in stock at NewEgg. :-/

So to run 3 of those I necessarily need to undervolt them?

nice..... How much you spent to build that?

I quess it will run with stock volts too, but you can just save 100W with no perfomance loss if you undervolt.

That's great, thank you for the infos man :)

GPU works whithout resistence?

i mean like this:  http://www.overclock.net/t/384733/the-30-second-dummy-plug

Yes, only have wireless usb and control via VNC.

other question,
i note u use both pci-e 16x than 1x
is there any difference in khash/s, using 1x pci-e slot?

this because i'm starting to build my first rig, and i'm confused what motherboard choose
what best and cheapest?
asrock fx970? or fx 990
and gigabyte ga970a with 2 pci-e 16x and 3 pci-e 1x? it is able to support  5 r9280x?
farther, considering that 16x pci-e riser are very difficult to find in italy, for me is better choose this mainboard and use 3 risers 1x for 3 card while i'm waiting the 16x risers from china?

tnx in advance for reply :)

edit: for VNC, you use teamviewer?

Do your cards use the Hynix or Elpida memory?

fuck.

Here's my bfgminer conf.  I have a sapphire twin-x, gigabyte (with the windforce cooler) and an asus card.  here are the stock/current clocks:

gigabyte: 1100/1050
sapphire: 1020/1070
asus: 1070/1040 (seems to perform poorer at stock than 1040)

I didn't over/underclock memory as it didn't seem to affect my performance that much.

Oh, he has 5 cards. I misread earlier. This pulls surely over 1700W from wall.

i'm so tempted to do the same thing, but i'd burn my wall socket first.

shit-ass apartment.

Could you explain this to me..

i am interested in running a 4 card rig but i get a little confused on power draw at wall.. i get that 1550-1650 is at the wall.. so does that mean a 1500w 80 PLUS SILVER will be unable to handle that draw from 4 gpu's?

I doubt that any 1500W silver PSU can handle this load. But perhaps some barely can. You need to undervolt your cards and your PSU will be totally fine then.
My first miner ran 1190W from the wall with Lepa 1000W. This is gold standard PSU and gets around 89% efficency at 100% 12v rail load. As you can calculate, i ran it over its technical limits and it was still absolutely stable. Amazing PSU. I ran this setup at 1190W for 2 weeks. Later i flashed my GPUs to more efficent bios and now it uses about 970W from the wall with cards running 1005/1500. 1037mv.
I get less hash than before, but cards run a lot cooler and quieter. So i sticked with that.

Thanks kerge.. but i was actually refering to a 4 card build..

the PSU is the cooler master M2 silent pro..1500W

I can get 750Kh/s from my Sapphire Dual-X's quite easily at 1080/1500 and undervolted to 1.180... be sure to use the latest drivers - 13.12... immediate 100Kh/s jump.

btw.. op says he

"can run at 765Kh/s per card at 1.2V if I lower mem to 1500 and engine to 1100"

any idea what will be the total power draw at wall then..

what is the best program or drivers to control the voltage of Sapphire 280X's... I am using Sapphire TriXX... but wish I could control it through cgminer or similar low-level option instead of needing to run a separate program.

My approximate quess is 1600W-1650W

I don't have a meter on my rig atm.  I'll shut it down over the weekend to gather specifics at both voltages and post here.

i have a feeling your right.. is the power draw lower for the 280x oc.. if it is.. will 5 cards be supported by 1500W

Sry to be harping on this but i have a tendency of having a bad circumstances with electricity and i have images of shocking my home into ashes if i were to monkey with a dual psu build...

Btw 1500W is pretty much the highest Watt PSU i can find around here... no LEPa/ENERMAX... sigh.. also no add2psu

Nice post. I'm running on 3 x 280x dual-x now, waiting for the last riser cable. Pulling 929W @ 1080/1500 at 750kh/s per card. At these clocks you say 1125mv. This is undervolted? What are the stock voltages? Is this through cgminer config or done with Trixx?

When I check the three cards, card 1 is @ 1200 VDDC, card 2 @ 1163 VDDC and card 3 @ 1150 VDDC. How can there be a difference with 3 of the same cards?

Also, when I check GPU-Z, card 1 is @ 1.038V VDDC, card 2 is @ 1.013V VDDC and card 3 @ 1.044V VDDC. What explains the difference compared to Trixx?

I did try to undervolt the cards the first day I set it up, while running @ 1080/1500. Tried to undervolt them a little bit down from 1163 and 1150, but the AMD driver would almost instantly crash. Is this normal?

I'm just wondering if it is definitely possible to undervolt while running @ 1080/1500, because I do like the hash rates.

hello,
   when i use 6 GPUs, i meet one issue -  the system can not recognize the fifth and sixth GPU
   on motherboard, four GPUs is ok, but the fifth GPU can not be recognized in system.

   i am using BIOSTAR Hi-Fi H81S2 motherboard, five R9 280x , 12G ram.
   if you have any solution, please tell me, thank you very much.

please help me

thanks

Hey.
CPUz can give false reading some times. But often its pretty accurate. Most AMD reference disain cards have around 1.16-1.2v vddc as stock voltage. This varies due ASIC quality. Lower asic cards can not run as low volts as high asic cards.
For example my lowest asic card is 64.2%. This can barely run 1000mhz @ 1042mv. If i clock it to 1005mhz, it will fail after few hours of mining. My highest asic card on same PC can run 1020mhz @ 1037mv stable.
So if you want to do very accurate undervolting then you have to make custom bios for each card separately or as alternitive you can use MSI AB too, if you uncheck the option which syncronizes settings for all cards.
Hopefully this answers your question.

BTW. I have not bothered to undervolt every card separately on my mining machines. They all run above settings. One machine runs 1000/1500 @ 1042mv because low asic quality cards in it.

I have access to 8x SAPPHIRE R9 280X TOXIC OC 3GB DDR5 384-bit cards. 4 of them I want to keep for myself, but other 4 I can't afford to buy. If someone is interested I will be able to get them for him. Europe preffered and I think europe only since I know nothing about import taxes etc there.

Depending on price, i may be interested. Im in EU.

Its 1500 PLN here in Poland, what is Your currency? Of course if You prefer bitcoins we could do some math.

OK. This is riddiculus price. for 6000PLN i can get 6 cards locally. Not Toxic versions but for it doesnt matter. They all produce the same hash per watt.

Depends really, it is less than 360 euro... I would be really, really interested if You can get me non-toxics for 1000 PLN per one. MSI or gigabyte ones are for 1400PLN here..

If you do some research and contact your shops or dealers by email, you may get them at this price.
I bought my Gigabyte 280x OC versions with 249€ a week ago. And VTX 280x cards with 224€ a month ago.

well I will try to contact the "toxic dealer" about it, but could You also send me gigabyte dealer info on PM? Thanks!

Sorry. Its local dealer. Does not send out of country.

and that sucks so much... Can't get anything here at NORMAL price...

BTW, I've received a reply from the "toxic dealer" He said he can go down in SAPPHIRE R9 280X TOXIC price to 1300 PLN, but only when I buy 25+ cards(up to 34)... And the shipment would be in 3-5 days... :(

I'll guess I'll have to pay full price then :/

do You know this x5 GPU power usage now? :)

windows 8? i can't seem to get past 4 with win 7.

Hey man, i have 3 of those cards in a similar rig.  I can't seem to get above 550.  Can you share your cgminer start line with us?

Thanks!

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?

CGMiner settings to reach that speed on these cards?

page 1, post 19

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.

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"

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.

:) ;) :D

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!

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  ;D

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

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?

vapor-x too? :O

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

3gpus running steady at 815kh/s.  8)

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

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

better at 750kh/s but for 1050mv

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

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?

VBE7. Wonderful utility.

Somebody here with expiriences on saphire dual x r9 280x?

I have 5 of r9 280x Dual-X, Its about 706khash average and 70C per GPU.

I'd say 280x toxic, doing 800+ for me.
Still have some in my groupbuy #2, check description ; )

hey

i got a rig running with 4x R9 280X Gigabytes. One of them is somehow below average and in general i cant get them running as fast as they do on my 3x r9 280x rigs.

The 4x go up to 710-720 while the 3x go up to 775 with the same settings.

Can anybody tell me where the failure might be. I'm running the 4x Rig with 2 Corsair XM850 GOLD PSUs.