[quote name=“sheepson” post=“49053” timestamp=“1388659246”]
I did not read everything in this topic, but you are running a 1300w PSU and got a £100 increase in 3 days?
That’s not possible!

I don’t know the kw/h rates where you live but for example in the Netherlands it’s pretty expensive (around $0.29 kw/h).
Let’s say you run 24/7 1300w (1.3 kw)
1.3kw * 24(hours) = 31.2
31.2 * 0.29 = $9.048, so 9 dollar / day.
$9 * 3(days) = 27 per 3 days.
[/quote]

Yeah, that was my math initially. price here is 0.149£ per kw, so my calculations gives £4.5 per day cost. And I don’t believe it’s running at 100%…

My measurements are simple - I’m on top-up meter. I know my normal household uses up to £30 per week. And just before launching mining PC I’ve topped meter up to £120.
Today it has run out… That’s why I was so shocked. Now trying to take hourly measurements and will turn off PC off to see if it really is the one that uses insane ammount electricity. Though I think this much… it should be on fire by now…

Everything is working perfectly, however electricity usage went through the roof :o
I was expecting increase, but not a 100£ in 3 days increase…
Could it be that I’m wasting power because I have 1300w psu, and only 2 vga’s connected?
Also, how much could I undervolt it if anybody done that?

Hm, the dedicated rig is doing 710 KH/s, however I have another PC running the same single VGA, and there same settings for some reason only bumps it up to 580 KH/s :)

Thank You! running at 710 KH/s! wonderful!

–scrypt -u Kiwis.1 -p xxx -o stratum+tcp://pool.d2.cc:3333 --gpu-platform 0 -d 0 -w 256 -v 1 -I 13 -g 1 -l 1 -T --gpu-memclock 1550 --gpu-engine 1070 --thread-concurrency 8192
this one runs on around 570 kh/s.

–scrypt -u Kiwis.1 -p xxx -o stratum+tcp://pool.d2.cc:3333 --gpu-platform 0 -d 0 -w 256 -v 1 -I 13 -g 1 -l 1 -T --gpu-memclock 1550 --gpu-engine 1150 --thread-concurrency 8192
this one runs around 605-610 kh/s.

trying to increase gpu engine further drivers starts crashing instantly…

I use currency 8192.
With the one you suggested it actualy dropped by 15 kh/s

using gui miner. the only setting I’ve managed to find do myself is:
–gpu-memclock 1550 --gpu-engine 1070

So it has arrived :) 3 VGA’s does not fit without risers :'( bought some, waiting to be delivered.
For now trying with 2 VGA’s. Problem is that it only runs ~520 KH/s.
As I see, people talk about flashing bios, but I have no idea what files to use for that.
Tried searching, but can’t find any decent info apart 7970 flashing.
Could anyone point me to the right direction to achieve 700+ KH/s? :)

Thanks for comments!
Well, after looking at MB, I’ve ordered only 3 VGA’s. Not going to use any risers, at least for the moment.
I will use mid tower. Keeping side open is not an issue. Sound is not an issue. Temperature… Well, it will be standing next to my air conditioning unit, so I think it should be OK…
However all of it will arrive only for the next year as VGA’s are pre-order for 27th december…

Hello everybody. I’m mining for a week now on my 7970, doing just fine.
Decided that I want to build a rig just for FC mining.

A friend of mine advised me to get four VGA’s - [url=http://www.overclockers.co.uk/showproduct.php?prodid=GX-323-SP&groupid=701&catid=56&subcat=1842]http://www.overclockers.co.uk/showproduct.php?prodid=GX-323-SP&groupid=701&catid=56&subcat=1842[/url]

Well, first of all, I’m a total noob in computers.
My questions would be…
1. Is this a good VGA, or there is better ones for it with price/performance ratio?
2. Never had PC with more than 1 VGA… IS there a lot to set up for it to work properly with all 4?
3. What MB and CPU to buy so it could run 4 VGA’s at once? (preferably a link from overclockers shop)
4. What PSU to buy so it would have enough juice to power it and enough 8-6 pin cables? (preferably a link from overclockers shop)

That would be all for now. More to follow once I buy the parts I’m sure :)

Edit:
So another person I know advised me with this rig - [url=http://i.imgur.com/rEM4DII.jpg?1]http://i.imgur.com/rEM4DII.jpg?1[/url] is that ok or could be better performance for the price?