New rig (2x 5870) crossfire question/problem

Meni Rosenfeld

donator

Activity: 2058

Merit: 1054

Quote from: c-rock on May 06, 2011, 09:43:02 AM

Quote from: Meni Rosenfeld on May 06, 2011, 02:40:33 AM

Quote from: c-rock on May 05, 2011, 07:32:54 PM

Make sure you upgrade your PSU. I would recommend a 900Watt or higher PSU.

You don't need a 900W PSU. You need a high-quality PSU such as Seasonic X-series, 750W tops but 650W should do fine too. Anything which is not from a known brand is utter junk, and even within a brand some products are good and others not so much.

you might be able to go with a smaller one, but your efficency will be lower, plus overclocking does use the juice more. I still stand by my recommendation. A bigger PSU will have better effiencies.

For efficiency the most important thing is to get an 80+ Gold one. Once you do that increasing the power rating will have almost no effect.

c-rock

member

Activity: 60

Merit: 10

I love the Cloud, and Love Mining, how 2 combine?

Quote from: Meni Rosenfeld on May 06, 2011, 02:40:33 AM

Quote from: c-rock on May 05, 2011, 07:32:54 PM

Make sure you upgrade your PSU. I would recommend a 900Watt or higher PSU.

You don't need a 900W PSU. You need a high-quality PSU such as Seasonic X-series, 750W tops but 650W should do fine too. Anything which is not from a known brand is utter junk, and even within a brand some products are good and others not so much.

you might be able to go with a smaller one, but your efficency will be lower, plus overclocking does use the juice more. I still stand by my recommendation. A bigger PSU will have better effiencies.

benjamindees

legendary

Activity: 1330

Merit: 1000

It's amazing to me how awful the PSU market has become. I had good luck with Antecs for several years, but I have one here (SP-450) that crapped out, because apparently it had defective capacitors. "Japanese capacitors" is now a feature that is used as a selling point. Wattage ratings are completely useless. Oh well, I'll try my luck with Corsair.

Meni Rosenfeld

donator

Activity: 2058

Merit: 1054

Quote from: c-rock on May 05, 2011, 07:32:54 PM

Make sure you upgrade your PSU. I would recommend a 900Watt or higher PSU.

You don't need a 900W PSU. You need a high-quality PSU such as Seasonic X-series, 750W tops but 650W should do fine too. Anything which is not from a known brand is utter junk, and even within a brand some products are good and others not so much.

c-rock

member

Activity: 60

Merit: 10

I love the Cloud, and Love Mining, how 2 combine?

Using poclbm and was getting 358 on my first card,
and 370s on the second.

I could push them more, but they would crash.
You need to just work it up to a level that is borderline crazy. Tongue

kstepyra

newbie

Activity: 52

Merit: 0

Nice, ill give it a try in couple days. Btw - you are mining with normal GUIMiner? And what's yours mhash/s ?

i heard it can go up to 400 and over it with little OC and specific card parameters

c-rock

member

Activity: 60

Merit: 10

I love the Cloud, and Love Mining, how 2 combine?

I am running a Win7pro 64bit with two 5870s.

I had no probs running miners on both gpus. You have to have two miners running. Change the Device to =1 and =2 for each miner bat file.

I did not crossfire them. It does not matter for the 5870s. You can have them crossfired, or not. Same performance either way.

Make sure you upgrade your PSU. I would recommend a 900Watt or higher PSU.

c-rock

kstepyra

newbie

Activity: 52

Merit: 0

Hi,

It's my first topic in here, so don't yell at me if i post it in wrong place:)

I am going to buy new computer for pc games, but i am also going to use it as rig. It's going to be 2x 5870 GPU's.
The question is - if i have windows 7 professional 32bit (can change it to 64 if needed) i will be able to run miners on both gpus? or i will have to change anything/install software or something?
Also i heard about turning out crossfire. How does it affect mining / games? or it's impossible to mine on crossfire?
A nice explanation on topic will be nice as i've seen on wiki that there are 5870 x 2 statistics.

Best regards,
Jakub

Topic: New rig (2x 5870) crossfire question/problem (Read 2169 times)