Bitcoin Forum

Hello all!

I'm pretty new here. You might have seen my "Diary of a Bitcoin Virgin (https://bitcointalk.org/index.php?topic=54105.msg645381#msg645381)" post I made last month. I've stuck it out and am still lurking the forums.

I want to build a mining rig, and I've searched quite a bit for rig builds. But posts with actual builds don't seem to exist.

So from what little I've pieced together, I'm come up with this. I'd appreciate if you could critique this and let me know why or why not it would be a decent build for a mining rig.

Motherboard:

• Biostar TA990FXE AM3+, AND 990FX chipset, $130

Processor:

• AMD FX-6100 3.3 GHz (3.9 GHz Max Turbo Core), Hexa-Core, 8 MB Shared L3 Cache, $160

CPU Cooler:

• Xigmatek Gaia SD1283, $30

Memory:

• Mushkin Enhanced Redline 4 GB (2 x 2 GB) 240-Pin DDR3-1600 Kit Dual-Channel Desktop Memory Kit, $40

Graphics:

• 3 x Radeon HD 5870 2GB GDDR5, $600

Hard Drive:

• OCZ Vertex Plus 60 GB SATA II SSD 60 GB, SATA 3Gb/s, $80

Case:   

• Antec Three Hundred, $58

Power:

• Corsair Professional Series HX1050 80 Plus Silver Certified 1050-Watt, $210

Total Cost:   $1308

I'm pretty sure it's a given, but I'm going for max value - lowest time to break even. I also went with the 6-core AMD for some CPU mining too (litecoin).

I appreciate you checking this out and look forward to your feedback!

Litecoin probably won't make you enough to justify the increased power draw from the CPU running full throttle.
If it is dedicated to mining, you might not even want a case - they don't have quite as good ventilation as an open fram rig (my current build).

If I were you, I would cheap out on the CPU, say a Semp140 or 145, but also an ASRock mobo (because Biostar is cheap as well as crap, and ASRock is cheapish and high quality) :)
Also, memory could be a $13 2gb kit.

Finally, never go cheap on the PSU. You should size the PSU to be running about at 50-60% load with your hardware, for maximum efficiency.

Thanks for the feedback.

I love building gaming rigs, so I'm approaching this with that background and mentality. I'm sure I'm going overboard on some components (which is why I'm doing this post, of course ;) )

I could take it or leave it on the case. I've had good experience with the Antec 300 case and they are cheap atm, so I threw that in.

I usually build with Intel i5s or i7s. I just can't bring myself to cheap out too much on the CPU. But I will if it's not worth it.

Did I go cheap on the PSU?

No, Corsair is good. 5870=188watts each with no overclock, so 3x188=564, which is about 53% of your PSU, not including proc, mobo, fans, etc. If you are making a dual-purpose rig, by all means go for the faster proc, etc. I am just saying what I would do for a single-purpose dedicated miner.
Good Luck.

if your not going to have an open case rig, at least make sure you have tons of air flowing into the case for cooling. 3 cards side by side will get very hot

https://plus.google.com/u/0/photos/112408294399222065988/albums/5658727447810944545

Hi Nyte,

Your $$$/Mh is pretty high right now. I would like to make some suggestions to get this down. Please look through my post history to see my credentials.


I would recommend going with this motherboard -> http://www.newegg.com/Product/Product.aspx?Item=N82E16813157262

Saves you $20 and you can run 5 cards with extenders if you want some day.


If this is a dedicated mining rig, I would recommend using a sempron CPU -> http://www.newegg.com/Product/Product.aspx?Item=N82E16819103888

Saves you $120.



If this is a dedicated mining rig, you can just use the stock cooler with the CPU.

Saves you $30.



Just get two value sticks of 1Gb memory -> http://www.newegg.com/Product/Product.aspx?Item=N82E16820139343

Saves you $20.


Get these at ebay -> http://www.ebay.com/itm/AMD-ATI-Radeon-HD5870-HD-5870-PCI-e-3D-Video-Graphics-Gaming-3-Port-Card-w-HDMI-/130608691744?pt=PCC_Video_TV_Cards&hash=item1e68e27a20#ht_2994wt_1348

At $170 each, you can get three for $540.

Saves you $60.


Don't do a hard drive if it's a dedicated mining rig. Do this -> http://www.newegg.com/Product/Product.aspx?Item=N82E16820139246

Saves you $70.


When I first started mining, I tried 3 6950s in a high air flow case. It did not work. Look around on the forums and figure out how to build an open air case. You'll save your cards and your sanity. Build it out of wood, it's less expensive.


Do this PSU -> http://www.newegg.com/Product/Product.aspx?Item=N82E16817517008

Save you $100.

As for the OS, use BAMT. Look it up on the forums. Donate to the creator.

Looks like if you follow my instructions above, you'll save ~$300 and build a 1.2Gh rig for under $900. Your $$$/Mh would be around $0.75 which is a good target for all new equipment.

Let me know what you think.[/list]

That is a nice system but a horrible rig.

RAM.  Cheapo-cheaperson-cheap brand.  2GB max.  1GB is fine.
CPU.  Sempron.  Every dollar more spent is just more burned wattage.
CPU Cooler.  The stock junk is more than adequate.  My semprons barely get warm to the touch with fan spinning as low as it can go.
Case.  Open frame.  A case just costs more to raise your heat.
HDD.  Forget a SSD.  Use cheapest HDD you can find or even better Linux on a $5 USB stick.

The PSU is decent but for the long run you want nothing less than 80Plus-Gold.  Efficiency wins.
GPU are a good pick but personally I would go w/ 3 used 5970s for $900.  You will get about 50% higher hashrate.  Granted 50% higher for 50% cost isn't great but now the rest of system cost is ammortized over more hashes.

You can build a 3x5970 rig (used GPU) pushing 2.2GH/s on 870W for roughly the same price.

Do what gigasvps and DeathAndTaxes say.

Invest in:
-A motherboard with enough PCIe slots for your desires. (Don't buy Gigabyte though, they're awful for USB Boot).
-Video cards.
-A good power supply.

Everything else is money lost. Boot from USB and buy cheap.

Very few manufacturers actially build PSUs (the actual manufacturers are companies like Seasonic, CWT, Delta, Superflower, Impervio, or FSP).
The others just purchase built PSUs and put their labels on them.
Corsair doesn't manufacture PSUs.

That particular one was OEMd for Corsair By Channel Well Technologies (CWT).
The HX1050 is based on CWT's recent PUC platform which is a decent design.
Efficiency-wise it does 80 PLUS SILVER⁽¹⁾ though the HX1050 was never certified.

Links:
(1)     http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=245 (http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=245)

I think you can shave off a lot.

Go with:

AMD Sempron-saves power and costs less.
CPU cooler? As far as I'm aware, you can stay stock, but heat is a problem. Even in a open rig.
Minimum memory you need, doesn't even have to be 1600 or high end or anything.
Why SSD? I'd rather get a junk Platter style if you insist on a drive
Don't bother with a case.


Your build seems almost like an odd gamer build. Just with the entire setup. Only thing is a gamer wouldn't pick a tri fired (can you even do that?) 5870.

I think you can do better than the 5870's (not positive, and I'm not researching it)
Litecoins aren't really worth the extra power/heat that you will have to deal with.
A lot of miner's don't even use an actual Hard Drive. Normally it is a flashdrive with LinuxCoin on it.

Aren't you mixing two different concepts? The resistor trick is only required when using multiple PSUs with one rig. It has nothing to do with using flash drives.

That was a misunderstanding. That makes more sense. I'll edit my post. Thanks.

gyg, i got excited when you showed this link, but they they are not 170 each....  they are Price:   US $370.99  each..

Wow, they used to be cheaper, wonder why the seller changed the price so dramatically.

They must have changed the price today to see if they can make some more money. Bastards.

I'm not going to pick a fight on PSU's, but I've always liked Compucase's Zephyr Line. I like the quality, efficiency, and price.

I agree with most of the advice presented here.  Get a good efficient power supply.  A good motherboard, I use the MSI 890FXA-GD70, http://www.newegg.com/Product/Product.aspx?Item=N82E16813130274.  Don't get a case, a waste of time, money and it doesn't work as well.

I disagree about the hard drive.  I started out with usb sticks and switched to 60 G ssd drives.  You end up rebooting the computer a lot, especially when getting the computer set up, and the fast boot time of an ssd drive really helps.

Sam

Beg your pardon? Rebooting a dedicated miner a lot? Doling out money for a SSD drive?
Let me check my calendar - is it All Fool's Day yet? Surely you must be joking.

If you need bootup speed just buy a faster flash drive, something using USB3 like A-Data N005.

Thanks all for the feedback. A lot to digest, but goes down smooth ;)

So based on these comments here's the "Virgin's Mining Rig, v0.2":

Motherboard:

• MSI 890FXA-GD70 AM3+ AMD 890FX SATA 6Gb/s USB 3.0 ATX AMD (http://www.newegg.com/Product/Product.aspx?Item=N82E16813130274), $185
• Alternative: ASRock 970 EXTREME4 (http://www.newegg.com/Product/Product.aspx?Item=N82E16813157262), $109
• (I think I'm going with the MSI in this build - I have nothing but great experiences with MSI)

Processor:

• AMD Sempron 145 Sargas 2.8GHz Socket AM3 45W (http://www.newegg.com/Product/Product.aspx?Item=N82E16819103888), $40

Memory:

• Crucial 2GB (2 x 1GB) 240-Pin DDR3 SDRAM DDR3 1066 (http://www.newegg.com/Product/Product.aspx?Item=N82E16820148148), $14

Graphics:

• 3 x Radeon HD 5870 2GB GDDR5, $600
• (For my build, I already have these cards - other builds may want to consider something different)

HD / USB / SSD:

• USB: Kingston DataTraveler 101 Gen 2 8GB USB 2.0 Flash Drive (http://www.newegg.com/Product/Product.aspx?Item=N82E16820139246), $9
  
• Alternative SSD Build: OCZ Vertex Plus 60 GB SATA II SSD 60 GB, SATA 3Gb/s (http://www.newegg.com/Product/Product.aspx?Item=N82E16820227738), $80

No Case:

• Open-air build: Cost Unknown

Power:

• KINGWIN LZP-1000 1000W 80 PLUS PLATINUM Certified (http://www.newegg.com/Product/Product.aspx?Item=N82E16817121089), $229

Total Cost (w/USB):   $1077
Total Cost (w/SSD):   $1148

So a couple of thoughts:
The power supply could be cheaper, but it seems investing a little more up front might pay off in reduced energy costs in the long run. Not sure if $100 extra is justified though.
The MSI Motherboard is $80 more than the ASRock. I love MSI and have great experiences with their boards. I have zero experience with ASRock.

So, potentially this build could be at $997 going with the ASRock.

How's this looking?

The LZP-1000 is a superb power supply.
It's able to give you 77 83 amps in the 12 volt rails.

With this PSU he can add another GPU later on without hassle and additional expenses.

I actually have 4 of those 5870 cards, but I thought I read somewhere that things get a little crazy when you add the 4th card. But that said, I do have 4 cards I can use.

Also, should I be factoring in the cost of PCIe extension cables?

I use that MSI motherboard.  It is somewhat expensive but rock solid, and allows up to 3x5970 without expanders.  

I agree the PSU is likely oversized.  My guess is that mining 3x5870 don't pull more than 650W DC (remember PSU are rated in DC, AC at the wall will be about 10% higher).  So 850W is probably fine.  Nothing wrong going with a larger PSU expect you may be paying for power you don't need.  

If this is a dedicated mining rig I would drop the SSD unless you just enjoy wasting money and power. It will provide absolutely no benefit.  If you boot from USB drive you can turn off entire SATA subsystem in BIOS and save a couple watts (while you are there turn off USB3, onboard sounds, EIDE, etc).

I still think the SSD is worth it.  Labor saved is worth a lot.  But, I have 10 rigs.  If you have one then the amount of maintenance you need to do is not that much.  Then again I started with only one computer, you may end up with more.

I would get the MSI because you can expand it to run 6 cards.  I run 4 5870 cards on mine.  It burns 812 watts, 164 watts per card and 166 watts for the rest.   So if you want to go to 4 cards get at least a 1000 Watt power supply.  I went with Antec, Corsair,  and Theraltake all 90% gold.  I don't think you will make back the price difference (I haven't figured that out so I don't really know) but I'm very concerned about reliability.  Things break and you want to minimize downtime.  I figured that higher rated power supplies would be more reliable.  Even still I did have to send one back for a replacement.

With that rig I get 406 MH/(card sec), 1.625 GH/sec total. I run cgminer at 900 MHz gpu, 160 MHz memory per card.

Sam

FWTW, I run 30Gh with the Asrock boards and have nothing but good things to say about them. I run 5x6950, 5x5850, 5x5870 and 5x5830 without any issues.

I also have the following items if you would like to buy them from me for bitcoins. These are extras left over from my build out.

- ASRock 970, same as I linked to.
- Sempron CPU
- Sticks of memory
- Extenders

PM me if you are interested.

All of the equipment is new and I would sell it for BTC. rjk bought some of this stuff from me and is all up and running. This would help get your costs down more.

Care to elaborate, Sam?
There is no difference whether you use an SSD of a usb flash drive. Linux sees them both as /dev/sda.
Install your favorite distro, set up miners, and test the rig. If you're setting up multiple machines just clone the newly configured OS using dd and you're good to go with minimal effort.
Any quality USB3 flash drive will give you decent bootup speed. Adata N005 (which I value for its high transfer rates) is 30-something dollars.
How can one justify spending the extra cash for SSD drives?

Well. I payed $80 to make my computer boot in 10seconds (win7 from "loading" to fully ready to gameout"
And that $80 also turned my BF3 loading time into 15secs, When it used to be One min or more just to load a fking map.
SSD's are for Gamers, And people doing REDICULOS amouunts of data transfers.

Otherwise, there is no jusificaton, Just get some shitty 20GB hdd

I take back what I said about SSDs.

I just burned out a disk on one of my rigs last night and I realized that most of my disks are 20 MByte laptop drives that I got from microcenter for less than $20.  I have some SSDs which came with a computer I bought off of craigslist.  The SSDs are fast but not much faster than the laptop drives.

You can see that I've tried to build with inexpensive parts.

My main point is that using a USB drive major annoyance.  They take many times longer to boot than a hard disk.  Since I started with them I have a few as backups.  My rig with the burned disk is running off of a USB now and it takes over 2 minutes for it to boot up.

Sam

Then you are doing something horribly wrong.  My rigs use el cheapo USB drives and don't take more than 30 seconds to boot.  With Linux I have found shutting off all the "junk" (floppy drive controller, EIDE controller, SATA RAID controller, onboard sounds, serial port) in BIOS greatly improves boot times.

I think once when I was diagnosing a slow Linux live boot I found out of the 3 minutes it took to boot about 2:15 was trying to detect floppy drive. :)