Bitcoin Forum
October 21, 2020, 01:53:39 AM *
News: Latest Bitcoin Core release: 0.20.0 [Torrent]
 
  Home Help Search Login Register More  
  Show Posts
Pages: [1]
1  Economy / Computer hardware / [UK/EU] RX580 8GB Cards BARGAIN on: May 30, 2018, 03:22:24 PM
My farm is switched off and has been for a few months.

I have 16x RX580 cards gathering dust, along with a bunch of supporting hardware.

No set price. If you would like to buy an RX580 card make me an offer, any sensible offer will be accepted as I need to free up the space for another project.

Will ship to anywhere in the world. Escrow accepted. Youre welcome to inspect goods in person or see videos of them working.
2  Economy / Computer hardware / [WTS][UK/EU] Lots of RX580, RX480, R9 280X, PRICES REDUCED on: April 04, 2018, 12:56:00 PM
I have for sale:

10x RX580 8GB cards, Sapphire Pulse, Stock BIOSs @ £275 each. REDUCED: £245
8 x RX580 8GB cards, MSI Armour, Stock BIOS @ £275 each. REDUCED: £245
2x RX480 8GB Cards, reference blower, £250 each. REDUCED: £225
4x R9 280X (3GB?) Cards: £75 each. REDUCED: £50

Open to sensible offers on anything. Will cut deals on bulk purchases.

Barebones Mining Rigs, cards removed. Picture here (with cards still in): https://imgur.com/ncJNkZ6
Specs:
ASUS H81-M Plus
Celeron G1830 CPU
4 Gig DDR3 RAM
4x Risers
2x 700w PSU
Hard Drive with Windows good to go
Professional Steel Open Air Frames
£220 each 5 available. Can also be bought with the graphics cards still installed. REDUCED: £190

All located in the South East of the UK near Gatwick Airport, and can be seen working. Payment ideally in sterling upon collection, but will accept crypto via Escrow and ship to anywhere.




3  Economy / Computer hardware / [WTS][UK/EU] AMD Based GPU Rigs on: March 12, 2018, 04:12:06 PM
I'm selling off parts of my farm, so I have some rigs available.

Rig 1&2: £1900 each ONO

4x RX580 8GB Cards
Asus H81-M Plus Motherboard
Intel Celeron CPU, 4GB RAM
2x Coolermaster 700w PSU
SATA HDD
Professional Metal Frame

Rigs fully operational and stable, running Windows 10. Currently mining PHI @ 16.5MHs/card


Rig 3: £2150 ONO

4x RX580 8GB Cards
1x RX480 8GB Card
DFI Lan Party 5 slot motherboard
Intel i5 750 / 4GB RAM
1x XFX 750w PSU, 1x HP Server 700w PSU
HDD
Professional Metal Frame

Rig fully operational and stable, running Windows 10. Currently mining PHI @ 16.5MHs/card

Rig 4: £1000 ONO

4x R9 280X Cards
Asus H81-M Plus Motherboard
Intel Celeron CPU, 4GB RAM
1x Coolermaster 700w PSU, 1x HP Server 700w PSU
SATA HDD
Professional Metal Frame

Normally runs ZEC @ 290MHs/card. Server PSU Fan has lost a bearing however, so needs a new secondary PSU.


Rigs are all in Sussex, in the UK. Ideally buyer collects and pays cash/transfer/crypto upon collection. Will ship to UK/EU but you will need to pay upfront or escrow only. Pictures available on request.



4  Economy / Computer hardware / [WTS] [UK/EU] R9 295x2 Cards on: October 04, 2017, 10:02:36 AM
For sale i have 3 295x2 cards. The cards mine ETH at around 100MHs each, or ZEC at 550Hs.

Edit: Now just £450 each. OR make me an offer.

Shipping to the UK is free. Shipping worldwide at cost price, should be around £15 to most of the world. Local pickup buyers proffered. Will accept any major crypto or cash/transfer. May accept paypal if you appear highly legit.  I am located in Gatwick in the UK. I am a traceable, legitimate business seller. You are very welcome to come and meet me to see the cards and discuss.

Cards have been mining ETH and ZEC just just fine for months, but office relocation forces sale.

Some minor plastic damage on one of the cards power connectors, no bearing on operation. Cards are fully working.
5  Economy / Computer hardware / [WTS] [UK/EU] R9 280X Cards **Price Reduced @ £105 Each** on: July 21, 2017, 10:55:07 AM
For sale is the 280X part of my farm. They use too much power to suit my garage any longer.

These ideally suit somebody with low electric cost. They average 300H/S ZEC, so are still perfectly profitable even with standard electric costs. They run about 200w/card- slightly higher for the 7970s.

They have been used as miners for around 4 months. They are stable, have good fans, and have always been run in a very well ventilated garage keeping them cool and happy. They are all 100% tested and working, and are mostly mining as I type, bar the 4 I had to switch off to stop the fuse blowing.  

The items for sale are:

10x R9 280X Cards - £120 each, mixed brands, assume no boxes.  **Now Reduced to £105**
2x 7970 Cards,- £100 AMD reference coolers.  ***Now Reduced to £90***

Items are in the UK, near Gatwick. If you are local you are very welcome to come see them working and pay cash. If you are not local you are welcome to see a video of them working and pay BTC escrow. Shipping will be tracked and signed for. Shipping to the UK is free if you take the lot, or £6/box if you don't take them all. Shipping to the EU will be an extra £20/box.

Priority will go to a buyer taking all of them. Serial numbers will be recorded, along with video evidence of the cards working before shipping.

I can include the DVI Dummy plugs if required. The other hardware is not included, but feel free to inquire about it if you really want it.


6  Alternate cryptocurrencies / Mining (Altcoins) / [WTS] [UK/EU] R9 280X Cards x 10, 7970 Cards x 2 on: July 21, 2017, 09:53:27 AM
For sale is the 280X part of my farm. They use too much power to suit my garage any longer (when my wife puts the drier on the fuse blows and I get shouted at), so need to find a new home.

These ideally suit somebody with low electric cost. They average 300H/S ZEC, so are still perfectly profitable even with standard electric costs. They run about 200w/card- slightly higher for the 7970s.

They have been used as miners for around 4 months. They are stable, have good fans, and have always been run in a very well ventilated garage keeping them cool and happy. They are all 100% tested and working, and are mostly mining as I type, bar the 4 I had to switch off to stop the fuse blowing.  

The items for sale are:

10x R9 280X Cards - £120 each, mixed brands, assume no boxes.
2x 7970 Cards,- £100 AMD reference coolers.

Items are in the UK, near Gatwick. If you are local you are very welcome to come see them working and pay cash. If you are not local you are welcome to see a video of them working and pay BTC escrow. Shipping will be tracked and signed for. Shipping to the UK is free if you take the lot, or £6/box if you don't take them all. Shipping to the EU will be an extra £20/box.

Priority will go to a buyer taking all of them. Serial numbers will be recorded, along with video evidence of the cards working before shipping.

I can include the DVI Dummy plugs if required. The other hardware is not included, but feel free to inquire about it if you really want it.


7  Alternate cryptocurrencies / Mining (Altcoins) / Starting a ZEC mining farm: Maximum ROI strategy. on: March 23, 2017, 08:41:51 PM
I started a small farm! I have been building it this week. This is what i've learnt.

I now make £1260 per month. I spent around £3225.

I get free electricity included in my industrial rent so that wasn't a concern. My goal was the quickest possible ROI. I got it down to about 10 weeks to recoup 100% of my costs with this method.

Album here: http://imgur.com/a/xj449 (note this was before completion, just the first rack was done. Some detailed changes were not yet made).

Software
This is what you want to install on your hard drive when you set up:

I've been running clean installs of Windows 10. I tried linux, but unless you know what you're doing everything just takes 10x longer while you figure it out. Stick to Windows 10 if you're new. You can get windows from M$'s website, create a bootable USB, and install. When it asks for a product key, just tell it you don't have one and then install Pro. If it ever demands it you can buy them on ebay for ~£15.

Once installed, install the various chipset drivers, along with the AMD drivers. Using the right drivers DOES make a difference, so use the recommended 15.12 (make sure you uncheck the auto-update it asks for at the end of the install). If you're using RX4* series cards, you'll have to use newer drivers.

Claymore's miner (versions 12 and on) and Optimer (versions 1.6 and on) are both great. I think Claymore produces higher hashes overall. Use one or the other.

Claymore talks about putting in Environment Variables and setting the virtual memory, but doesn't explain where to do this. Right click the start icon, choose system, then advanced system settings. The virtual memory is under Performance settings, and the Environment Variables are at the bottom of that box. Once youve opened Environment Variables, click New under System Variables,  set the Variable Name as per Claymore's Readme, and the value as the number he gives. Then Ok when done. If i'm honest i've not noticed this making a huge difference on my systems. Also in windows add the miner to the startup list so you don't have to do it after a reboot, and change the power options to HIGH PERFORMANCE so it doesn't set the computer to sleep after half an hour of mining!

For remote access, use Teamviewer. It's simple and it works. That way you don't have to have a monitor etc. plugged into every rig.

Hardware
GPUs I went the route of buying cheap GPUs on Ebay or other used stores. I got about 15 R9 280X cards for an average of £70, and a handful of 290x for around £100. If they don't work, you can return them so who cares. Cards the seller claims are artifacting almost always hash fine. Cards with bad fans are easy to fix (take the bad fan out, strap an 80mm fan on instead with some cable ties). Buying cards with irrelevant defects will save you a fortune. You can also find some great deals by just watching ebay for auctions ending at bad times (I got a 7990 for £140, and a Pro Duo for £370. That's 1.6KH right there, in just two slots.) I think these cards will loose no more than £20 value/year, so you can always resell them when it's time to upgrade. Note that 280X cards are power hungry. I can't expand the farm because i'm using all the power I can get without pushing the wiring too far. That is the only major flaw- to go bigger i'd need to use lower power cards.

PSUS
When people say on here that cheap PSUs are a waste of time, they're right. I tried those 1000w on ebay for £30 PSUs. They both broke after running a single 280x for about 2 weeks. Utter garbage. Then again I think the £180+ 1000w brand name PSUs are also a waste of time and a hard to resell. Brand name PSUs hold their value very well so are a fairly safe investment. I like PSUs around the 750w/£60 mark from the half decent brands (Cooler Master, Antec, EVGA). Yes you need 2/rig, but I'd rather have 2 PSUS per rig for a total cost of £120 than one running £180 or more. It also means you can keep hashing at half speed if one breaks, and they are easy to sell on Ebay later for just a little below retail, so also very little risk of value loss.

Motherboards & CPUs
Motherboards and CPUs loose value faster than GPUs and PSUs, so I think you want to be careful here. You also want as many PCIE slots as possible. But the big 6+ slotter motherboards are now all £120 plus, often £150 or more. Give it a few years and they will be worth 1/3 of that. I went with the ASUS H81M-PLUS giving 4 slots for around £50. Stick a celeron in there for about £25, and a stick of cheap DDR3 (at least 2GB) and you're good. The cost/slot here is fine, that's all you're really interested in.

Harddrives
I made the mistake of going for cheap ebay 80GB HDDs for £5 each.  That was the biggest mistake i made in this whole project. I invested hours into install windows and drivers onto hard drives that then died outright, or were PAINFULLY slow at the desktop. Either buy £25 60GB SSDs, or NEW 80GB mechanical. Don't go cheap here,  it will drive you nuts later.

Risers
Get the good risers on ebay, they should be about £5 each. There is a cheaper version than that, the ones without the little PCB board at the base of the slot- but I found those had a very high failure rate- and were a short circuit risk.

Molex Adaptors ETC
I found a website called http://www.kenable.co.uk/ which if you're in the UK does some really handy stuff like Molex>8pin adaptors for very little money. Quality seems okay.

Casing
Those metal cases people are selling for £100+ are a stupid idea if you want to make your money back fast. I used old wooden ikea shelves we had laying around. Use whatever you can find. Plastic tubs look shit, but they work. Plastic or wooden shelves are where it's at!

Cooling
I went to Wicks and bought 10 lengths of wood for £11. I built them into a large frame (95x85x160cm) which sits around the miners. It is wrapped around the sides and top with bubble wrap to insulate and keep the heat in. There is a 3m plastic tube duct (£7 from amazon) which goes into the top of the frame through the bubble wrap, which extracts the warm air (I happened to have an in-line cooling fan, but those can be expensive) and pumps it out an open window. Cooling sorted. Otherwise the room does cook.

That's it! I hope that helps somebody.

Cost break down:
15x 280X £1050 4200H/S
3x 290X £360 960H/S
2x Dual GPUs £510 1600H/S
5x mobo/cpu/ram/hdd £575
10x PSU £600
20 x Riser £100
1x Misc £30
Total: £3225

Return: £1260/month.
8  Economy / Computer hardware / [WTS] [UK/EU] Sapphire RX480 8GB & Optional PCIE Riser on: February 20, 2017, 11:39:19 AM
I have an excess used Sapphire RX480 8GB that I lack a spare PCI slot for. All tested and working fine.

I'm asking the spot BTC, ZEC, or GBP equivalent of £240 (or best offer) UK next-day delivered for it, or £245 with a riser.  Will ship to Europe too- mainland Western Europe shipping is £8. Further afield may bit a little more.

Escrow is fine if you cover any fees.
 






9  Economy / Computer hardware / [WTS][UK/EU] Acer ES15 Laptop NEW, 15"/i3/SSD/1080/6GB on: February 11, 2017, 12:37:01 PM
For sale I have a limited quantity of brand new Acer Laptops. Available in Red or Black (while stock lasts PM to confirm). Windows 10.

Scammers, please don't waste your time. I won't fall for it, so don't bother.

Acer ES15 Laptop: .47BTC
  • 100% new unopened boxes.
  • Genuine UK seller, traceable and trustable. PM for more information on me and my shops. Local pickup welcomed.
  • Legitimately sourced hardware.
  • 6 Month Warranty Included.
  • Ridiculously good spec for the price. Try and find another 1920x1080 laptop with an SSD and an i3 at this price point, you'll see what I mean.
  • Shipping to UK by Parcelforce 24 included in price
  • Shipping to most major EU countries for .01BTC. PM for an exact price for your country.
  • Accepting Bitcoin, ZEC, Cash Deposit, or will trade for gold/silver bullion.
  • Will accept Escrow from trusted sources, but you will need to cover any fee.
  • Shipping within 48 hours of confirmed payment. Parcelforce 24 to UK. 3 day tracked service to most of the EU

Pretty picture of the red version here:


Laptop Specs:
Depth: 26.1 MM
Display Size: 15in
Height: 381.6 MM
Width: 258 MM
Graphics: Intel HD Graphics 5500
Hard Drive Storage: 128 Gb
Processor: Intel CoreTM i
RAM Memory: 6GB
Screen Resolution: 1920x1080
Screen Type: LCD
Wifi Enabled: Y
Intel® CoreTM i3-5005U Processor
6 GB DDR3L RAM
128 GB (SSD) Solid State Drive
15.6 inch (39.6cm) Full HD LED-Backlit Display (1920x1080)
Intel® HD Graphics 5500
DVD SuperMulti Drive
Windows 10 Home 64-bit
802.11a/b/g/n/ac WiFi, Bluetooth® 4.0, Gigabit Ethernet
1x USB 3.0, 2x USB 2.0, 1x HDMI, 1x SD Card Reader
1x RJ45, 1x Audio Line Out, 1x Webcam with Microphone
Battery life: ~4.5 hours

Note these include a UK plug, so if you want to use it in the UK etc., you may need an adaptor.

Please PM or post below.
10  Alternate cryptocurrencies / Mining (Altcoins) / What should I be mining? on: January 09, 2017, 05:02:55 PM
I have some mining rigs going, but i'm fairly new to this.

I don't understand why https://whattomine.com/ and http://www.coinwarz.com/cryptocurrency are giving me different results on their profitability calculators. One says I should be mining ETH and the other says ZEC. I hear murmurings that maybe i should be on XMR.

I've been mining ZEC the last few months. My electricity is free as it's included in rent on my industrial offices.

I have the following cards mining, spread over 5 rigs:

1x RX480
2x R9 290X
2x R9 280X
3x R9 270X

So, what should i actually be mining???


Pages: [1]
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!