Bitcoin Forum

Hi I'm new to bitcoin's and am thinking to buy a mining rig..

One question before the setup: Is it worth to get a rig and start mining now ? Or is it to late?  ???



The setup:

CPU: Intel Core i5-3570K
CPU Cooler: Corsair H80i Hydro Series
MOBO: MSI Z77A-GD65, Socket-1155
GPU: XFX Radeon HD 5670 - I'm going to start with this GPU, then I'm going to buy a better one ;)
PSU: Cooler Master V Series 1000W PSU
RAM: Corsair XMS3 DDR3 1600MHz 4GB CL9

Some questions:

-How much Mhash/s will I earn ? (approximately)

-Is it overkill with the 1000w PSU ?

-Some things I should add/take away ?


Thanks in advance! :)

You really should tell what you will be using it for.
Is it going to be a rig that will sit in a corner, mining coins?
If so, you're going very much overboard with the CPU. Get the slowest i3 you can get.
I do agree with the motherboard. That MSI board is a Military Class III certified board, and is arguably one of the best ones on the market when it comes to quality.

I would advise against using a liquid cooler system if you are only going to cool the CPU with it.
There is much more on the motherboard, especially close around the CPU, that will benefit from sufficient airflow.
The voltage regulators in particular would prefer a bit of a breeze.
Many people have had prematurely burned out motherboards because they took away the airflow around the CPU, allowing the voltage regulators to overheat and burn out.

If you're going to use the machine for everyday tasks, you really should consider adding an SSD as primary harddrive.
Reviews say they are fast, other people (including me) say they are fast, but you really need to see what they can do.
Trust me when I say that they will blow your mind.

Your current GPU should do somewhere between 70 and 100Mh/s, depending on the type, used miner software and wether you are going to overclock it.

When it comes to mining with GPU's: It may not be dead, but it's also not something that will generate a profit.
Just forget about profit and do it to support Bitcoin, in hopes it eventually becomes a valid currency.

The only thing you can do when mining on GPU's is getting something that will provide the most megahashes per watt of electricity.
This will keep the cost for your mining hobby to a minimum.

The powersuply is kind of overkill for that setup. If you are only going to run a single GPU, you may want to consider something around 600watts. Should be more than enough for that setup.

If you buying it for mining only I can see several things wrong with it:

1. You are overpaying for the CPU - you are never going to use it anyway: with this motherboard get I3-3220 for $90 cheaper - it will save you some power as well.

2. Who is using 5670 card anyway with only about 80Mh? If you looking to get into mining, get at least one 7950 and a good one: MSI HD7950. It will produce 8 times as much as 5670 and you will be able to sell later for a good price

3. Your motherboard can handle 4-5 GPUs, why limit yourself to 3GPUs with 1000W PSU, get at least 1250 for future use.

Okey, thanks for the good info....


So if I just have to pay like $20 for power, I still don't make profit ?

20dollars per what amount of time?

I'm not from the USA, so I don't know what the kWh prices are exactly, but assuming 15cents per kWh.
That 5670 GPU will earn you about 0.00015btc per day and uses 65watts of power when running at 100% capacity.

So for just the GPU, you'd be paying 15 cents for 15,38hours of work. (1000 / 65 = 15.38).
Lets round that off to 25cents per day. Assuming 1BTC = 100USD, then 0.00015btc = 1,5cents.
Effectively, you'd be losing 23,5cents per day, or about $7,29 per month just to run the GPU. I haven't included the cost for the rest of the machine.
Even if the decimal place moves over one, making you 15cents per day, you'd still lose 10cents per day.

So if you are paying your own electrical bill, you will lose money.
If you are renting a place that includes utilities, everything you make is pretty much profit.

Edit: oh and ofcourse, the above calculation is purely based on the current difficulty. Any income from mining will degrade over time, and has not been accounted for.
So yeah, if you currently pay $20 per month for your electrical bill, just add about $10 for the power usage of the new rig.

Use this calculator: http://allchains.info/calc.html to see how much you will be losing.

Your computer with 5670 GPU will take about 100W to run and you will be hashing at about 90Mhs