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Why not buy a new 7950 instead of paying $40 more for something that's used?
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Let me know what you got
wait for the next $250 with $40 worth of games you can sell on newegg, cause i doubt you'll find anyone selling them cheaper on here ppl like to pay more for used stuff than it costs new |
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Okay I have an offer for 3.25 BTC
If anyone can beat that ... I will ship it out Monday via USPS to provided address.
Escrow is fine.
Otherwise this item is sold as of 4pm west coast time 5.5.2013
Thanks.
i'm out. $380 for used 7970 that was mined on, no thanks. good luck. This 7970 is 48 hours old out of the box. It is virtually brand new. ah, but you can get brand new ones for $380 |
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i have some $200 fan, for about 20 gpus window that opens from top and bottom, put fan in bottom, seal the area around the fan, open the top up about 6-8 inches two windows would be better  |
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i'm not sure i've ever seen my 7850 above 60oC, it's an msi twin frozr 2GB they had on newegg for I believe it was $160 AR, maybe $170.
same deal w/ the games though
it gets about the same hash rate as a 5830 (*but uses a lot less electricity). after you sell the games and do the rebate, if you sold your 5830 used, you'd end up about even... with a card that'll be worth a lot more in the not so distant future when there's some godawful amount of 5830's on ebay
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five millions chinacoins for bitcoins
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I currently have a single x16 slot mobo that I want to use for mining. I don't want to spend too much money now because I am not really sure how profitable this is. I just want to learn more about PC building and mining. Anyway, I want to mine BTC first and then see if I can get into LTC or variants.
I have my eye on these cards:
[1] Powercolor 7870 Tahiti for ~$250 (1536 stream procs)
[2] Sapphire 6970 for ~$200 (1536 stream procs)
[3] Gigabyte 6950 OC for ~$180 (1408 stream procs)
I didn't take into account rebates but did consider taxes and shipping fees. Which is best bang for buck? If I find that this mining is not profitable, I would like to sell the card later. Are there other cards to consider in the best value category?
Finally, is the amount of stream processors is one of the main things that determine hash rate?
Thanks
is the powercolor 7870 tahiti better than some other random 7870? newegg has 7870s @ $210 all the time. right now it looks like the powercolor model is 210. last week, it was sapphire. they all come with that game pack that you can sell for $40 as well |
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this is why i dont do molex at all for gpus anymore. PCI-E plug splitters all the way. http://www.ebay.com/itm/290778077889http://www.newegg.com/Product/Product.aspx?Item=N82E16812198018I'd recommend the first one over the second one as the wires seem to be a smidge thinner, and dispersing the load in parallel instead of series is a lot safer and stable. Mind, I'm using the series ones because I got them cheaper from newegg and they work great, but the ebay ones will be safer and capable of a higher load. Cool nice one, think I might get a few of them at that price. But just to clarify, there would still be a single 6 pin PSU plug connecting both GPU connections (8pin+6pin) with these, which is where my problem occurred (melted 6pin plug in the PSU). Would it not be better to do: 6 pin from GPU -> 6pin socket on PSU, and a separate 8 pin from GPU -> different 6pin socket on PSU...? your topic says molex adapter. thats the 4 pin to 6 pin. we are talking about splitting a pci-e 6 pin into 2 pci-e 6+2 pin. I have a 51 gpu farm and I use many of these adapters. they worked fine when I ran my 7970 at stock volts (almost 300 watts!) through these adapters. I also daisy chained them for a psu that only had 4 pci-e plugs. yeah, i prefer to use those as well. only on one system do i use those molex to pci-e craps |
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I get about 580 from my cards. My clocks are: 1100mhz core, 150mhz mem. Cata 12.8 drivers, MSI AB as my clock and fan control. voltage is at 1.09 I think.
edit: using cgminer 3.1.0.
wouldn't you get a bit more around 180 mem? not sure if 7950's are the same, but for a 5870... ~160 is optimum memory setting @ 1000 core, ~180-185 @ 1080 |
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WOW! How?
1) actual bitcoin from git ( moves variables ...Fees.. from main.h to main.cpp) 2) set in src/main.cpp the parameters to int64 CTransaction::nMinTxFee = 1000000000; # Override with -mintxfee int64 CTransaction::nMinRelayTxFee = 1000000000; 3) compile bitcoin EDIT: Or.. not tested: set -mintxfee -minrelaytxfee to 1000000000 without editing main.cpp 4) in bitcoin.conf: blockmaxsize=5000 blockprioritysize=0 blockminsize=0 Greets Basically your saying that pool mining is 100 times better for bitcoin than your p2pool settings coz some pools can commit up to 100x the transactions that you do. Transactions are the other part of what is necessary to keep bitcoin alive. No transactions means no bitcoin. I wouldn start a discussion over the pro and cons of TX handling with P2pool. i would only show the impact of TX integration on the Performance in an actual setup. No transactions == bad idea. No discussion needed. M +1 I mean, you can all pat yourselves on the back and give the +1's and the high fives for Bitcoin The Way It's Meant To Be Run and glory be to Shitloads of Transactions.... But why not fix p2pool, instead? |
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I was digging into why it takes so long to get a new bitcoin client synchronized when I came across a shocking fact.
Mt. Gox pays no fees on their transactions! Look here, where they have moved over 5 500 000 BTC in 35 500 transactions and never paid a fee. https://blockchain.info/address/1LNWw6yCxkUmkhArb2Nf2MPw6vG7u5WG7q?filter=1Why do the pool operators tolerate this? I read here recently that Gox is making $3M / month. They could clear afford a few mBTC for transaction fees. And paying a fee would give them an incentive to use the blockchain efficiently. There is an easy fix. Blockprioritysize could be set in bitcoin.conf to a lower level forcing free transactions to wait several blocks. https://en.bitcoin.it/wiki/Transaction_feesI have also commissioned Jon Steffensen to add a set of tools to Bitcoin-qt that will allow fee rules to easily set by pools and solo miners. The branch is on git hub here. https://github.com/jonls/bitcoin/tree/mining-tx-filtersBlockprioritysize needs to be exceeded before these rules are applied. I don't want to get into the debate about whether transactions fees are too low or too high. I am just saying free transactions are clearly being abused and action should be taken to make sure that free transactions have a cost in time to validation. yeah, but pools make payouts via the same priority system |
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http://5.9.24.81:9332/static/ for Bitcoins, 0.1 donation, 0.0 fee http://5.9.24.81:19327/static/ for Clownshoe coins, 0.0 donation, 1.0 fee, subject to being dismantled at any moment furball: the latency is (from my experience) mostly determined by your maxblocksize. set it to 5000 (so you can catch a few transactions that might have bloated fees) and your latency should drop a lot. less transactions = lower latency. also less orphans Sigh, why do people do that? greed. Three ways to improve the situation: - speedup bitcoind rpc interfaces so that they can handle large blocks without slowing down
- track the amount of transactions included in P2Pool shares for each miner and make P2Pool distribute the transactions fees proportionally
- let the market decide: when transactions are piling up, there's motivation to increase the block size
Note that the first one would be useful for every pool and may be the simplest to implement: I'm not familiar with the code but I don't see why the interface needs to slow down with block size. bitcoind could maintain a cache of block templates and serve requests from it, updating this cache asynchronously according to incoming transactions and block generations. greed? so is that why people send out transactions with 10000 fee? what if i didn't think they were worth including in my blocks? |
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going back about 3 or 4 pages i sent him a custom copy of bitcoind on tues, now he runs around a constant 3.5-4ms latency. this is on some cheap $40 OVH machine. 8GB RAM and some semi-junk CPU. this was accomplished essentially by just raising the tx fee to 100000. at that rate, you'll only get tx'es that'll clear out on the next block. he's also set to 5000 max blocksize. though, you'd start to notice the ramdrive a lot more once you start raising the blocksize. the problem I have with it is that it also increases the # of orphans..
i think it'd be much better if the block solver got all the TX fees instead of however the reward system works now (and, no, this isn't favoring someone that's 60ghash, because like the share difficulty, in the long run it would all even out).
it does bother me when people have the maxblocksize set to <1000, though.... because occasionally you will get that transaction with the 5 BTC fee and it only takes a few KB to get it in a block... lenny solved one of those just about a week or two ago (block was worth 33, I believe) WOW! How?
1) actual bitcoin from git ( moves variables ...Fees.. from main.h to main.cpp) 2) set in src/main.cpp the parameters to int64 CTransaction::nMinTxFee = 1000000000; # Override with -mintxfee int64 CTransaction::nMinRelayTxFee = 1000000000; 3) compile bitcoin EDIT: Or.. not tested: set -mintxfee -minrelaytxfee to 1000000000 without editing main.cpp 4) in bitcoin.conf: blockmaxsize=5000 blockprioritysize=0 blockminsize=0 Greets Basically your saying that pool mining is 100 times better for bitcoin than your p2pool settings coz some pools can commit up to 100x the transactions that you do. Transactions are the other part of what is necessary to keep bitcoin alive. No transactions means no bitcoin. ...
Yeah, so there's really no reason not to just change it over to the TX'es. Add them to your blocks, take the risk of having a few more orphans, but get the whole TX amt if you solve it
Except that is the exact opposite of the BTC design. BTC design is to halve every 4 years coz transaction fees will 'supposedly' cover this over time. So doing it that way means to head in the direction of giving all the reward to the block finder ... i.e. the opposite of being a pool. so obtuse
i'm not helping propagate your share full of transactions, because it gets orphaned
if a large amount of transactions still cause shares to have an increased chance of being orphaned and assuming people still use p2pool when this may matter, in 4, 8, or 12 years, then i suspect it would be wise to then do a rethink.
oh, assuming the issue w/ the increased orphans isnt solved by then, in a decade or whatever.
he can run his pool the way he wants to. right now, that's the best way to run a p2pool pool. you can either a) fix p2pool so that having a bunch of transactions doesn't cause you to get double, triple, or quadruple as many orphans, b) implement a stop-gap like i proposed, or c) stfu |
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5.9.24.81:9332, 0% fee, 0.1% donation
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off-topic (probably related?), but i had some 16 gauge extension cord that had an unfortunate melting incident. i use all 12 gauge cords now (power supply + extension cords)
on-topic, i imagine the pci-e connectors are 18 gauge wire, the molex maybe just 20 gauge ? does it say 20 awg on it?
the PSU itself should be able to handle 3 cards
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you can run them at 330-350mhash if you want to overclock them a whole bunch and (probably) lose money, unless your electricity is free or really cheap. mine usually run at 290-305 @ 1.063v but i think the best value for money right now are the 7850 and 7870s which you'll see on special pretty frequently now. selling the game coupons are easy for $40-$50. if you dont mind wasting... er, spending time doing the mail-in rebates that's another $20 or $25 on most of these deals. so, something like a 7870 for around $150. you could sell a used 5870 for more than that, at least as of 3 weeks ago (havent checked since then). used 5830 was still around $100. i considered the 7770's but it would have taken too many mb slots.... if you throw out the whole limited space factor, the 7770's are best |
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120F ambient.... almost as bad as me  texas summers are hot  been lucky so far this year, march and april were both below normal, and this start of may is awesome. the forecast calls for the record low here (tyler, tx) to be broken three days in a row. that being said, on either the 6th or 7th of this month, i'm probably going to ship off about 1/2 of them to someone else (free elec, and 50-50 split)... the rest, I'll probably look to trade up to 7870's and 7850's, that way they'll still have good resale value when nobody wants GPUs for mining anymore (right now 5830, 5870, and 5970 sell used for way too much). buy 7870, take the time to do the mail-in rebate, take the time to sell the games coupons, take the time to sell a used 5870 = 7870 for 5870 and probably a little profit besides to last poster: VRMs are rated much higher than GPUs for temp, they should be fine up to 100oC, though i wouldn't want to run them that high (i dont mind 90oC for VRMs) |
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