Will it be enough?

[Silver_Pharaoh]

Temperature wise I'm better off too. The two 7950's together put out a lot of heat.

Yeah, heat ain't that great for mining!

 

[87dtna]

Well I put a couple 120mm fans blowing onto the cards, now temps are down to 76 for the top card and 61c for the lower card. Both at 65% fan, any higher than that and it's too loud.

Very disappointed in the hash rate though, only 525 each at 900/1250 clocks. Was only 600 at 1100/1500 so that's not worth the extra 100w. No idea how people are getting 700+ in the Wikipedia entries for 7950's.

 

[Silver_Pharaoh]

Well I put a couple 120mm fans blowing onto the cards, now temps are down to 76 for the top card and 61c for the lower card. Both at 65% fan, any higher than that and it's too loud.

Very disappointed in the hash rate though, only 525 each at 900/1250 clocks. Was only 600 at 1100/1500 so that's not worth the extra 100w. No idea how people are getting 700+ in the Wikipedia entries for 7950's.

Maybe you got a bad brand? Bad batch???
Weird...

 

[87dtna]

Hmm, well they are both MSI twin Frozr III models except one is on a 7970 PCB (8+6 pin) and the other is the newer regular 7950 (dual 6 pin). They are both putting out similar hash rates.

There's a few listings in the wiki results page and they are 690 and 702 hash rates at 1125 and 1140 clock speeds. Again when I had mine at 1100 core clock I only got 600 kH.

 

[Silver_Pharaoh]

Hmm, well they are both MSI twin Frozr III models except one is on a 7970 PCB (8+6 pin) and the other is the newer regular 7950 (dual 6 pin). They are both putting out similar hash rates.

There's a few listings in the wiki results page and they are 690 and 702 hash rates at 1125 and 1140 clock speeds. Again when I had mine at 1100 core clock I only got 600 kH.

Weird man. Doesn't make sense.

Try asking in the gpu coins thread I made, maybe Ivanlabrie or someone can help since I'm a n00b when it comes to cgminer...

http://www.overclockers.com/forums/showthread.php?t=741776

 

[87dtna]

OK got my dedicated rig all set up. Two 7850's and a 7950, total rig kH is 1300 and it's drawing 610w from the wall. With 85% efficiency that's about 520w at the psu. 80% load is a little higher than I'd want for 24/7 but it is a quality 80+ bronze unit so it should be OK.

According to this review-
http://www.kitguru.net/components/power-supplies/zardon/antec-truepower-new-650w-review/4/

it's still 85.2% efficient at 523w draw. Hell it's still 84% efficient at full 650w and the unit didn't even shut off until 715w.

 

[Silver_Pharaoh]

OK got my dedicated rig all set up. Two 7850's and a 7950, total rig kH is 1300 and it's drawing 610w from the wall. With 85% efficiency that's about 520w at the psu. 80% load is a little higher than I'd want for 24/7 but it is a quality 80+ bronze unit so it should be OK.

According to this review-
http://www.kitguru.net/components/power-supplies/zardon/antec-truepower-new-650w-review/4/

it's still 85.2% efficient at 523w draw. Hell it's still 84% efficient at full 650w and the unit didn't even shut off until 715w.

Did you overload it???

 

[87dtna]

No I was talking about the review.....theirs didn't shut off until they loaded it to 715w, which is 200w more than I'm loading my PSU.

 

[Silver_Pharaoh]

No I was talking about the review.....theirs didn't shut off until they loaded it to 715w, which is 200w more than I'm loading my PSU.

Then your good to go!

Happy mining!

 

[GTXJackBauer]

Glad you got it worked out OP. This whole thread makes me want to get into mining sooner than later. lol I will but when is the question.

 

[Silver_Pharaoh]

Glad you got it worked out OP. This whole thread makes me want to get into mining sooner than later. lol I will but when is the question.

Difficulty is always rising.....

 

[87dtna]

Yeah that's why I stopped LTC and just went with middlecoin, making atleast 1/2 again what I was with LTC.

 

[Silver_Pharaoh]

Yeah that's why I stopped LTC and just went with middlecoin, making atleast 1/2 again what I was with LTC.

So switching to middlecoin was a bad idea?

 

[87dtna]

I didn't say 1/2, I said 1/2 again....meaning 1.5 times what I was making with LTC.

For example if I was making ~$10 a day on LTC, I'd be making $15 a day with middlecoin.

 

[Silver_Pharaoh]

I didn't say 1/2, I said 1/2 again....meaning 1.5 times what I was making with LTC.

With my current hash rate I'd be making ~$10 a day on LTC, but I'm making $15 a day with middlecoin.

Ohhhhh