Open air bitcoin rig

angaddev · May 11, 2013

Hi, I am looking at a bitcoin rig with a Lianli T60 on ebay for £1800, the specs are
3x ATI HD 7970 3GB GPU's
990FX Motherboard
AMD FX 4100 3.6GHz
1250W XFX Black Edition Modular 80+ Gold rated PSU
60GB SSD
DVD Writer
8GB RAM
Windows 7 Home Premium 64bit OEM, key provided
Lian-Li T60 Open Bench Case (Black or Silver)

Can I do better?
I want to use this to mine, but I will be selling my 2500K/7970 rig in the summer so I need something that I can do anything with, hence the high budget. I can take the SSD, HDD, RAM, one 7970, and 2500K from my current rig, and sell the HX1050 and G1.SNIPER2.

I have this so far :

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU Cooler: Phanteks PH-TC14PE_BK 78.1 CFM CPU Cooler (£89.70 @ Amazon UK)
Motherboard: ASRock Z77 Extreme9 ATX LGA1155 Motherboard (£256.79 @ Amazon UK)
Video Card: Gigabyte Radeon HD 7970 3GB Video Card (3-Way CrossFire) (£313.97 @ Amazon UK)
Video Card: Gigabyte Radeon HD 7970 3GB Video Card (3-Way CrossFire) (£313.97 @ Amazon UK)
Video Card: Gigabyte Radeon HD 7970 3GB Video Card (3-Way CrossFire) (£313.97 @ Amazon UK)
Case: Lian-Li PC-T60B ATX Test Bench Case (£78.59 @ Amazon UK)
Power Supply: Antec High Current Pro 1200W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply (£218.04 @ Amazon UK)
Total: £1585.03
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-05-11 18:53 BST+0100)

Approximate Purchase Date: e.g.: Around June 4th

Budget Range: £1000 - £1750

System Usage from Most to Least Important: LTC, BTC mining, gaming, rendering, image editing

Are you buying a monitor: No

Do you need to buy OS: No

Preferred Website(s) for Parts: any UK site

Location: London, UK

Parts Preferences: AMD GPU(s)

Overclocking: Yes

SLI or Crossfire: Yes

Your Monitor Resolution: 1080p

And Most Importantly, Why Are You Upgrading: Want to mine, want a system that can come apart easily and can go anywhere with some bubblewrap and a box.

Deleted member 217926 · May 11, 2013

I would not invest big money in a rig like that with ASIC miners becoming more and more common. If anything buy one of those.

angaddev · May 11, 2013

I need to use it as a computer too, as I am selling mine. With 4x 7970s I am sure I can hit 2,250 Kh/s, and according to a calculator, that's $369 of LTC per mo. Minus 950W and 0.30 per kwh and I make $165 a month. Not bad. At that rate I can make $2k a year (at current difficulty). I'm not trying to break even, just making money with an epic gaming computer. As the diff. increases, then I will upgrade the GPUs with the money I gained with LTC.

AustinS · May 11, 2013

Okay, so you have one 7970 that you are going to reuse, and you are going to buy 3 7970s for quad crossfire? Am I correct?

Austin

AustinS · May 11, 2013

You will use more than 950 watts with 4 7970s and a 2500k by the way. Here is the build I have come up with, I highly suggest it, you will save money on the motherboard and you will also need more than 1200 watts, as the total system wattage, before overclocking is already 1175 watts. So I have put a 1300 watt psu on, but you may even want to bump up and get an EVGA Supernova 1500w to be on the safe side, because overclocking can pull a lot more power. And I also found free shipping deals for all of the part

http://uk.pcpartpicker.com/p/WzsC

Austin

AustinS · May 11, 2013

I just realized that Amazon had made a mistake in there naming, and the board I put on there is still an Asrock Extreme 9, but for cheaper and with the wrong name on the website.

Austin

angaddev · May 11, 2013

How many watts would I save with a 2x 7950 2x 7970 setup?

AustinS · May 11, 2013

You cannot run two 7950s with two 7970s. They are not crossfire-able. And you would only save about 50 watts anyways as the 7970 and 7950 are both based on the same Tahiti gpu, the 7950 is just slightly scaled down.

angaddev · May 11, 2013

So should I get a 1500W PSU like this?
http://www.scan.co.uk/products/1500w-enermax-platimax-epm1500egt-full-modular-80-plus-platinum-95-eff-eps-12v-1-x-139mm-fan-atx-v23

Also, the Lian Li case looks good but I can't seem to find the fan mount for sale in the uk. Are there any benches with fan mounts, or will it run fine w/o fans

AustinS · May 11, 2013

Yes, that is a very good psu, it has an efficiency of above 95% when above 50% load. Very good choice. Nice price too. As for the fan mounts. You will not need fan mounts on a bench case. The reason being that it has fresh air already there for it. It will work very good without any extra fans.

Austin

angaddev · May 12, 2013

So does the build look good? Will I be able to hit 2500kh/s when mining scrypt?

AustinS · May 12, 2013

I do not have a wealth of knowledge of bitcoin mining, however, I do know that your system will be ridiculously powerful. And if you want to increase your gaming platform, then I highly suggest investing in a 2560x1600 monitor, as 4 7970s will just be wasted on a 1080p monitor.

Austin

angaddev · May 12, 2013

AustinS :

At the moment I don't have the money needed, but I will look into it,

AustinS · May 12, 2013

Cool, hope you enjoy your new computer! Maybe do a build log too, its always fun to see a build log with a quad gpu configuration.

Austin

angaddev · May 12, 2013

AustinS :

Sure. hopefully will get the parts by the start of june, ordering a 7970 now

My builds are pretty messy and boring

AustinS · May 12, 2013

Maybe try to spice it up a bit then. Get some led light straps, do some nice cable management, etc. Make it look beautiful cause it is your baby. And you should treat it like that.

Austin

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