Problems with my 3x5870 Mining rig

[lolmiepp]

Hey guys.

I recently bought an computer with 3x HD5870.

And now i've got 2 problems

let me first describe my goal: My goal is to be able to play games on the computer, And mine bitcoins when i don't.
Like a friend of mine has: he's got in GUIMiner -45, so that when he plays games, the miner client won't disturb him that much.

I thought that reaching this goal was going to be easy, but it's not.

Problem1.
My fans are behaving strange. Sometimes, they just go back from 70% to 50.
this is a problem, because at 50 they get like 90 degrees, which is far too much in my opinion....
I'm using MSI Afterburner, Does anyone here know another (not too difficult) programm i can try that maybe will work? or perhaps a fix?

Problem2.
I can't combine gaming with bitcoins mining.
The thing is, that the cards won't mine in GUIminer, f45, not even in -f20. Only in f1 they mine good.
(with not mining i mean 1-8mhz/s instead of the 430 i normally have)
I'm having the same problem with phoenix.

I thought i could fix this by not using the cards at all, and just use the 2500k to play some humble games.
but that doesn;t seem to work either, because then the fans swith back to 50%, and are locked that way in MSI Afterburner.

Thank you for reading this big post, thanks in advance if you're able to help

[1715597634]

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[1715597634]

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[Yanz]

1) Go in afterburner and click settings and then there's a tab that says enable custom fan control or something like that. It allows you to define a custom fan curve. Basically force the fan to a certain speed for a certain temperature.
2) You should stop all miners when you play games. Or at least on your main card if they aren't crossfired. You can't play games on just your CPU. Well you can in your case actually (the Sandy Bridge has a built in graphics card), but you need a Z68 motherboard I think...

[genewitch]

you can do what you want with cpu miners but not gpu. i can't even watch videos on the internet or my computer while i am mining because i underclock my VRAM and overclock the GPU.

with 3 fast cards, you will pull nearly a GH/s when you are mining, so i wouldn't worry about a couple of hours a day where you shut them down for some gaming.

guiminer/poclbm try these settings -a 5 -w256 BFI_INT AGGRESSION=19 -f 0 VECTORS see if you don't start getting more share submits. I get 105+ an hour with my single 5850!

Underclock your ram to 300Mhz, or 900mhz. try setting AGGRESSION to 13, as well. and -f 1. futz around and tweak till your happy with your share output. 

[lolmiepp]

I'm already happy with my output! i'm around 430mhz for each card

@yanz: I did that, but it still sometimes comes down to 50% when i;m doing things on the computer, like editing phoenix.
2) I don't understand it, but it seems like my main card also slows down when i'm only mining on the other cards. i don;t understand it.

[mewantsbitcoins]

Hz = Hertz = unit of frequency, equal to one cycle per second
H = Hash = a fixed-size bit string

[Third Way]

What motherboard are you using?

[lolmiepp]

* hash


motherboard: Asrock Extreme4
Intel 2500K
Antec Twelve hundred V2
3x GV-R587OC-1GD
Monitor: Dell2411U