4 x 7970 psu?

[bitlane]

I put a link to the cards I am using at the bottom of my post above.

[Buckwheet]

I put a link to the cards I am using at the bottom of my post above.

Thanks for that. It seems like the Gigabyte cards are the ones that can get lowered in voltage the most. My HIS cards take a total shit with anything less than 1.1. You cards and another posters are both getting great voltage numbers and both are running GB cards. I have 36 7970s now and none of them are Gigabyte.

I have 24 XFX Black Editions and 12 HIS. I am not super happy with either's performance.

Edit: Any plans to release your custom monitor code?

[bitlane]

I put a link to the cards I am using at the bottom of my post above.

Thanks for that. It seems like the Gigabyte cards are the ones that can get lowered in voltage the most. My HIS cards take a total shit with anything less than 1.1. You cards and another posters are both getting great voltage numbers and both are running GB cards. I have 36 7970s now and none of them are Gigabyte.

I have 24 XFX Black Editions and 12 HIS. I am not super happy with either's performance.

I decided to try and up the overclock a bit more (+10Mhz), from 950 to 960Mhz on each GPU to see what would happen.
It had no effect on the power readings on the UPS's (which probably means I could undervolt a bit more if I wanted to) and the cards are now running at approx 573 MH/s each. I will run like this for a day or so and try more after I confirm this is stable.

[bitlane]

Edit: Any plans to release your custom monitor code?

I actually didn't write it.
You can find it in the Mining Software Section. It was written by jjiimm_64. I changed it a bit, but it's his project....and available for free.
"CGMiner Web Monitor"

<EDIT>
Here you go.....
https://bitcointalk.org/index.php?topic=58834.0

[Buckwheet]

So I did some basic math at 11 cents per KW. With all the component costs static and the only difference being your 5 cards versus 4 cards at different clocks.

I have 1150w producing 2600 hash to your 865 watts and 2825 hash. That is with 4 and 5 cards respectively.

When you add in the extra cost of the 5th card you will generate 2% more money in the same 8 month period of time if you sell your cards for the same per card amount as the 4 card user.

That is based on someone buying 7970s about a month or so ago and mining until the reward halfs.

That is if I did my math correct.

If the difficulty stays the same and the price stays the same after the reward halfs you would be making about $1.10 more per day per rig than the person with the stock voltage 1100mhz miner.

[cuz0882]

I'm seeing a lot of bad advice on here. A lot of miners think its best to fit whatever they can on a power supply. They justify this buy claiming a good brand name can handle it. It's easy to burn up a power supply mining. The extra heat reduces the life of the power supply and lowers the efficiency. The closer you get to max load also effects it. Anything over 80% load is asking for trouble.

[jjiimm_64]

Edit: Any plans to release your custom monitor code?

I actually didn't write it.
You can find it in the Mining Software Section. It was written by jjiimm_64. I changed it a bit, but it's his project....and available for free.
"CGMiner Web Monitor"

<EDIT>
Here you go.....
https://bitcointalk.org/index.php?topic=58834.0

I just updated with the latest version.

bitlane:  you should update yours..  you would like the heatindex.

[bulanula]

bitlane, I was asking if it could be done.

Leave the power and heat requirements to me.

Anybody know what memory speeds to flash for 7970s ?