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Author Topic: Is this setup viable? Some calculation inside  (Read 1137 times)
arvinrajsinghgill
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January 28, 2012, 10:21:35 AM
 #1

Well guys, this is my current rig:

Asus Maximus IV Gene-Z gen3 (Mitx)
Intel Core i5 2500k @ 4.8GHz
2 x 4GB Kingston DDR3 Value Ram
2 x 4GB Kingston DDR3 Server ECC Ram (Salvaged from a server)
Corsair Force GT 120GB SSD
Samsung F3 1TB HDD
Corsair GS700 PSU
Silverstone TJ08-E casing


As of this moment i am using an ATI X550 ancient GPU. I am planning to buy a graphic card. Either HD6990 or HD7970. Will be used for gaming but If i could make some cash , then full time Bitcoin mining. I am from Malaysia Btw.

The average price for HD6990 @ USED = USD559
The average price for HD7970 @ NEW = USD624

Using the calculator from : http://www.alloscomp.com/bitcoin/calculator.php

The average Mhash would be = 750 according to https://en.bitcoin.it/wiki/Mining_rig
Power Consumption should be around 469 Watts according to http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/41404-amd-radeon-hd-6990-4gb-review-21.html
Add 60 more Watts for the overall computer usage and it is 529 Watts in total.

Now according to the calculator with the current difficulty @ 1307728.3606
Exchange Rate @ $5.40333

Now lets do some math (Also, if you have not read / missed it, I am from Malaysia)

Our formula = Electricity charges - bitcoin generated per month (according to the calculator) = profit / loss

So lets do it.

529 Watts / 1000 = 0.529 * 24 Hours =12.69 Kwh * 30 days = 380.88 Kwh per month

Local charges for 380.88Kwh = RM 109.35 OR 35.96 USD

Calculator @ http://www.alloscomp.com/bitcoin/calculator.php says

I'll be making $94.75 per month. So $94.75 - $35.96 = $58.79 of profit per month.

Guys is this calculation correct? This is of course assuming that the rates are static and every variable is static (It might change but just for the sake of this thread we will assume its static)




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January 28, 2012, 11:15:33 AM
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You won't be earning more that 88$(1) a month, mostly due to stale/invalid shares. Likely you'll make even less than that.
You'll make less than that for sure should you choose a pool with mining fees.

It's crucial that you take the slow-but-steady path to overclocking the card - if you crank it too high and it becomes unstable the amount of downtime might be significant.

I'd go with the 6990 as it's both faster and more energy efficient than a 7970.
Should you choose to proceed with bitcoin mining and purchase a second 6990 card, that PSU of yours will need to be upgraded.

Notes:
(1) This value should be accurate as it's based on my own earnings, scaled proportionally down to fit a 750MHash/s rig.
arvinrajsinghgill
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January 28, 2012, 11:37:53 AM
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You won't be earning more that 88$(1) a month, mostly due to stale/invalid shares. Likely you'll make even less than that.
You'll make less than that for sure should you choose a pool with mining fees.

It's crucial that you take the slow-but-steady path to overclocking the card - if you crank it too high and it becomes unstable the amount of downtime might be significant.

I'd go with the 6990 as it's both faster and more energy efficient than a 7970.
Should you choose to proceed with bitcoin mining and purchase a second 6990 card, that PSU of yours will need to be upgraded.

Notes:
(1) This value should be accurate as it's based on my own earnings, scaled proportionally down to fit a 750MHash/s rig.

Thank you very much. The $88 doesn't seem too bad.

Perhaps I shoud do some more reading on this.
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