none of that hardware is in any way suitable for mining.
What kind of hardware would be then? bitcoins require GPU mining with ATI devices (Nvidea uses a different method of shading and doesnt work well for mining) you might be better with litecoin (LTC) mining. ~2000 LTC = 1 BTC and its more CPU intensive. You still wont get much on your hardware, bt itll be more then from bitcoins |
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You can't use a GPU in the reg PCI slots, but you can use one in the PCIe x1 slot with a riser cable.
I would be wary of investing any money into a GPU rig at this point. Current GPU rigs can still operate at a profit, but I doubt its worth it to put money into building a rig.
Yes, your profitability calc says you should receive a 100% ROI in 250 days, but that does not take into account ASICs. Regardless of your opinion on the who's-who of ASIC manufacturers, SOMEONE will deliver ASICs in the next 2-3 months, and then your rig will be mining at a loss.
You might be able to sell your hardware for close to what you bought it for 6 months from now, but that's assuming all of the hardware still works. You're already talking about GPUs that are 2 years old, and mining really pushes them to the limits. If one of your GPUs or your PSU or any component fails, you're now stuck selling that broken piece of hardware at a loss.
TL;DR I would not recommend buying a GPU mining rig at this time.
nicely put, thanks for verfying my thoughts. Ive made a lowball offer and also offered to host the equipment if interested (i have a few places in mind where i could get cheap electricity or otherwise use the rig for winter warmth) |
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hahaha only are trying scare people to cancel their orders to break BFL
BFL Enemies:
Miners scared of increasing difficulty.
Miners without money to invest in ASIC.
Bored trolls.
you forgot the 4th group: those watching all companies simultaneously and seeing BFL consistently announcing delays or lack of demonstration units, while avalon has phonographs of thier chips and an actual release countdown timer. |
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I have come across a sales ad for someone offloading their mining equipment (not sure what the reason) for very good prices.
Here is the equipment available:
MSI 870-G45 Motherboard + AMD Sempron 130 CPU + CPU Cooler
4 x Sapphire HD 5850
various PSUs from 400-600w
If im correct, the mobo can only support 2 pci-e cards, correct? Or can the basic pci slots operate a 5850 card (ie: more cards per mobo)
Assuming only 2 cards can be used, it would be roughly: 700 Mhash/s (~350+ per card) 450w (~150 per card) ~$200 for a single machine setup. Electricity costs $.09/kwh
based on calculations, the ROI is about 250 days, which isnt particularly bad. However, this assumes that SIC devices dont come out for at least a few more months, which is arguable from both sides.
Is this worth the investment and time, will there be much resale value in ~6months?
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Still on track for the 20th?
I assume this will be when pre-orders go out (or start to). When will general sales start?
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if diferent betwen 2 progran in intensity, where i can get/change the intensitas in cg miner?
Press G, I, 0 (enter), and the intensity you want. Do it one by one. from what i can see the first method has produced no shares, so the hashrate is still something of an estimate. my advice is locate the batch file produced by ceasy and open it. from there you can easily tweak the settings as desired. generally speaking, you dont want an intensity >16 because it will cause the card to crash/reset, but this can take some trial and error (start at -I 12 and go up each time). if you dont want the program to hog the GPU power (slowing down your pc to sub-useful speeds), try an intensity of 8 or 9. personally, i run: cgminer --scrypt -o http://mine.pool-x.eu:8337 -u klondike_bar.2 -p xx --shaders 40 --intensity 10 --worksize 64 -g 1 because intensity 10 is about the balance between acceptance rate and hardware errors that makes most sense. |
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does it require full [paid] version of minecraft? |
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Oh, I have 3 6990 cards.
then you should be mildly profitable, but not an a very fast speed. Any futher steps you can take for reducing your electricity cost or the power use from the mobo/HDD/CPU/etc would make the profit marin better What are a few basic moves that can be taken? It's just a barebones open case rig with Mobo, CPU, ram, and gfx cards running win7, nothing else installed. I also downclocked the gpu mem speed. Undervolt! Lowering the core speed by a tiny bit and undervolting can result in huge power savings, while only costing you a small amount in hashrate. undervolt the cards? Is there a recommended amount to do it by? tiny amounts. IIRC, you should be able to drop the speeds by about 5%, and bring down voltage about 1-2%. try in small 0.5% or 1% steps, letting the system run for at least 30min between steps to ensure it operates normally before contiinuing. |
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this might be a terrible question, but would i see any benefit in employing a dual-processor (P3 chips, GHz unknown right now) mobo as a litecoin miner? would the minerd code be different in dealing with 2 seperate chips, or simply treat as threads?
otherwise, would a mobo like this (comes with the chips, 2GB of RAM, and a single unocupied PCI-E) be of any use for mining? Ive been told the power draw is around 100w, and the board was offered to me free. (i pay 6-10 cents/kWh depending if i use it to heat my home). Likewise, is the power draw of the board sufficient to make adding a GPU undesirable (in comparison to a newer smaller mobo with single CPU)?
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Dont have any great jokes, but sure would like to get cheered up with a free deposit, in your honour I will partake in a cheer!!
no joke, just a bitcoin request? its somewhat amusing, but not very funny  |
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Oh, I have 3 6990 cards.
then you should be mildly profitable, but not an a very fast speed. Any futher steps you can take for reducing your electricity cost or the power use from the mobo/HDD/CPU/etc would make the profit marin better |
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You would have much bigger hashrate on that i7 using 64bit minerd. But it is only for Linux AFAIK
yeah i figured that might be the case. as for the post above that, i am connected to power, since my battery would die within 3hrs at 99% CPU usage. As for ram, i have 4GB, but minerd only utilises a few percent of that (the litecoin wallet uses more memory) |
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All i'd say is be careful mining with a laptop as it drains the battery life i believe really badly, possibly why ur i7 not getting more
how would my battery life influence hashrate? |
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ahh durr my mistake, heres the CPU batch file command: @echo off START /LOW /B minerd.exe --algo scrypt --url http://mine.pool-x.eu:8337 --userpass klondike_bar.1:x --threads 4 -r -1 -s 5 its essentially the default configuration as im not sure how best to utilise my i7 620m (2.67GHz) Ive got it working now, but at ~3.2khash/core (~13 khash/s) it feels slower than what i would expect (i imagined 20+ khash/s) -r -1 <-- dont specify this. dont set --threads too, so it uses all threads and maps each thread to a core (it does this on unix, dunno if this works in winblows). there is no need to set -s 5 too since this is default. so just: @echo off START /LOW /B minerd.exe --algo scrypt --url http://mine.pool-x.eu:8337 --userpass klondike_bar.1:x im running about 13.6 khash/s now, about an 8% increase. any other tweaks i should be aware of? |
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ahh durr my mistake, heres the CPU batch file command: @echo off START /LOW /B minerd.exe --algo scrypt --url http://mine.pool-x.eu:8337 --userpass klondike_bar.1:x --threads 4 -r -1 -s 5 its essentially the default configuration as im not sure how best to utilise my i7 620m (2.67GHz) Ive got it working now, but at ~3.2khash/core (~13 khash/s) it feels slower than what i would expect (i imagined 20+ khash/s) |
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I must be utilising this wrongly;
it tells me its initialising 4 threads but nothing more, even minutes later. do i need this in the litecoin directory?
full command line ur using or this is just guessing. cgminer --scrypt -o http://mine.pool-x.eu:8337 -u klondike_bar.1 -p x --shaders 40 --intensity 13 --worksize 64 -g 1 --gpu-engine 285 --gpu-memclock 760 its an nvidea NVS 3100m. default clocks are 300/800, but i found decreasing them slightly has little effect on hashrate but drastically improves on hardware errors (went from about 1 accept per 4 errors down to 5 accepts per 1 error) |
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hope this isnt a drastic revive, but:
minerd - Intel i7 m620 (CPU, 2.67GHz) : ~3.2 Khash/core = 12.8 khash/s
cgminer - Nvidea NVS 3100m (GPU, slightly underclocked and intensity 11) : ~4.8 khash/s
obviously these are both quite low, particularly as it is a laptop, but i wondered if anyone had any suggestions?
Ive managed to get the GPU hashrate to about 5 khash/s with ~10% HW errors by underclocking and tweaking the intensity (past 14 crashes the card), but that seems reasonable for a mobile card.
However, the CPU hashrate seems a bit low. based on other users, i expected about 1.5-2X my current hashrate
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with some slight alterations, ive underclocked the core and memory speeds by about 5%, and returned the worksize to 64. As a result i moved from 3.7khash/s to 5khash/s and reduced hardware error rate by 80%.
still feels low, even for a laptop GPU, plus i feel like im missing out by not having it utilize my CPU (i7 620 mobile quad-core) at the same time. any advice would be great, as the first-time setup is always the toughest
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