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^^ This but also mining bitocins that are then sold for £. This is what I don't understand, if you buy equipment (computer) soley create something (BTC) with the intention of selling that product for currency (£), then how is this not standard taxable income? |
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The good news for Bitcoin speculators is that any gains are treated as capital gains (taxed at 18%) and have an annual exemption. That's less of a burden than paying income tax on the gains. Of course, you will pay company tax on your trading profits, but that's to be expected.
Sorry I'm a bit of a beginner when it comes to these matters, but I don't understand this... What qualifies Bitcoin mining as capital gains? I've been looking on the Inland Revenue site, but I can't really find any examples that I can draw a comparison to Bitcoin with. Thanks in advance! |
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I think it is mobo dependent, because on my Asus P5K I cannot get a 5870 to be recognized in a PCI-e 1x slot with a 1x-to-16x converter, shorting pins A1 and B17 or not.
Do the 1x - 16x converters actually do anything, or are only the 1x pins connected up on the 16x end? I'm also running 5870s in an Asus, but granted it's a different model & chipset. |
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Great thanks, already got port forwarding set up for the Bitcoin Client - good to know I don't have to work out something similar for multiple mining rigs.
I wouldn't set up port forwarding on my router to the Bitcoin Client unless you are planning to have miners out in the world. And even then I'd use a dedicated wallet that was emptied immediately after a block was found. I don't think the client has been subjected to the rigorous testing necessary to expose it to the Internet (and hackers.) You run the risk of having your wallet compromised and all your coinage stolen. Thanks for the tip; reading the documentation I assumed that it was a necessity - will pull the forwarding now! |
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Short pins A1 and B17.... trust me, it works.
There is a picture on the above linked to blog post.
Glad that fixed his problem - though, why would there be a need to do this on some setups but not on others? Only reason I ask is because my 1x ribbons are working fine in my 16x slots with no shorts. Perhaps it depends on the motherboard? |
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Should be fine - assuming you have a router somewhere within the mix (obviously), you dont need to allow inbound connections for mining.
Great thanks, already got port forwarding set up for the Bitcoin Client - good to know I don't have to work out something similar for multiple mining rigs. |
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Hey Folks,
Are there any special NAT / connection flag settings required for this? I saw a post or two about the Bitcoin client having limited connections where there's no port forwarding, how are miner rigs affected by this?
Cheers
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Yeah I'm running 3 x 5870s at 418MHash/s per card. Each card is clocked at 945MHz core and 315MHz memory (stock voltage), and they run at between 63c - 67c depending on the weather outside (they're near an open window).
I ran them sideways also, as like they were when plugged directly into the motherboard, but with the new spacing apart. They ran about 2.5c - 3c hotter each, so laying flat definitely helps. I hadn't given much thought to running them cover down, I had assumed that because hot air rises that that would cause more of a buildup. Though, now that I think about it, the main exhaust outlets are on the bottom of the casing, so the hot air might be expelled better this way, rather than being trapped in the upper half of the casing.
I might flip one later on this evening and see how the temps run in comparison.
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Extenders arrived today, I had to hack the ends off them with a knife so that the graphics card pins could slot down, but it's now all installed and working fine with no performance reduction at all...  Cooling problem sorted, now I've even got room for a 4th card, chuffed  |
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Thanks, I've been reading about a bit and have seen some folk using x1 extension cables instead and only having the first few pins on the card connected. Would this cause any performance issues?
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Nice thanks guys - the price on that one you linked looks better too.
What do you think the limitations would be in regards to hooking 2 or 3 of these things together?
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The setup in the signature = 0.800kWh = 19.2kWh a day x 0.10306p = ~£2
So 1BTC costs £2 ($3.18) to produce
Who's your electricity provider? We're pretty shafted for choice across the water in NI. |
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Running at about 1.2GHash/s it takes me roughly 31 hours to generate 1 BTC.
My rig sucks up in an around 575w and here in Northern Ireland we pay £0.129/kWh.
So I make that to be £2.30 / 1 BTC. At current exchange rates that's about $3.67 USD.
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I had major cooling problems with my 3 x 5870s due to the proximity of the cards to eachother's fans, meaning that I couldn't really overclock them significantly without hitting 90c and above. Fixed with clothes pegs...  I then got into flashing the BIOS for faster speeds so needed more cooling. Fixed with some dryer ducting with a 92mm fan jammed inside...  Running at the following settings: Adapter0: 860/300 clock, 382MHash/s @ 69.5c Adapter1: 920/307 clock, 411MHash/s @ 68.0c Adapter2: 940/313 clock, 422MHash/s @ 62.0c All voltages & fans are at stock setting, though I'm tempted to manually set the fans a bit faster for the higher temps. All cards are running Phoenix with Phatk configured with: AGGRESSION=10 WORKSIZE=256 VECTORS BFI_INT FASTLOOP=false -q 2 I can't really go above 960 core clock without the cards crashing, due to voltages probably - has anyone had any luck changing this on XFX 5870 under Linux? The setting is locked in RBE and I can't find any software option. |
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Really, the best way to mine on those cards would be to throw some LN2 in there and clock them up to 1300/300 @ 1.4v
Perhaps not as cost effective to run though  |
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Finally got my 3rd 5870 in which means I could begin flashing & overclocking...
Now running at 1.25GHash/s using Phoenix with Phatk: AGGRESSION=11 WORKSIZE=256 VECTORS BFI_INT FASTLOOP=false -q 3
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Thanks for the advice guys, I have since installed a 3rd card (decent enough PSU finally arrived) and this pushed temperatures up even more, though I overcame the restricted airflow problem with a very no-frills solution...  ...clothes pegs! Wedging a wider gap has helped loads now, no more 80C+ temperatures. The cards are running at: 66C [960MHz core, 320MHz mem] = 425MHash/s 72C [950MHz core, 316MHz mem] = 420MHash/s 78C [905MHz core, 301MHz mem] = 400MHash/s To be honest I was only aiming for 1GHash/s, but the bit of MacGyver has boosted me to 1.25GHash/s - well chuffed! |
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Thanks guys, I had a look at the shares and they all check out good!
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