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This is a bit of a noob question maybe, but whats the most efficient way to move USD between the big exchanges without getting hammered on large %'s for all of these stupid withdrawl fees?
i.e. is there any way to get USD from say btc-e to mtgox for less than 1%?
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Thanks btcnut, this is what I was looking for. I have 3 7970's just cranking right now and stability is more important to me than purely maxing out the motherboard.
Sounds like 4 x 7970 might be the trick.
What power usage are you getting out of a 4x7970 set-up ?
I can get as low as 605w @ 925mhz if I downclock and undervolt I run at about 650w with slight overclocking (while undervolting a little less) on the good cards to get about 580mhash/sec @ 162.5/w/card on average |
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Could not get 6x 7970s to work on Win 7 x64 on anything i tried
I got 5x 7970s on Win 7 x64 @ 80% clock on 11.12s. Cannot get 5 to work on anything else.
I got 4x 7970s on Win 7 x64 @ 100% clock on anything other than 11.12s
Havent tried winXP, there is some rumour that may work.
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How much difference in power consumption is there between say 685mhz and 400mhz?
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A few more questions from a coinlab noob:
1) How can we see how many loyalty points we have accumulated
2) How can we see how many loyalty points we have remaining
3) How can we see when coinlab believes we are at less than $2.50/ghash/day
4) Is ths $2.50/ghash/day based on MTGox avg trade per day or last price
4.1) If last price, how can we see what proportion of a days mining consumes loyalty points
5) Will we be notified when coinlab believes we are at less than $2.50/ghash/day?
You may have missed these quesitons while you were sick. Just wondering if you could answer when you get a moment. |
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There is a small number of users whose balance is not recalculated we are solving this problem and plan to complete it in 24 hours. SorryLooks all good now for me - thanks guys |
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im currently using multi 7950`s, and only change i noticed was +3-5c. running them at 1100/675... think i need some risers tho cause the first card in both rigs is running at 88c while the other is at 74c  Try tightening the screws on the heatsink assembly Also check in CGminer (or AB) that your fans are running at the same RPM. One of my cards runs at 2000 rpm @ 39% fan where as all of the others run at 2150-2250. The low RPM card was obviously always hotter than the others, until I bumped up the minimum fan to 42% in cgminer for that card. Tightening the heatinsk assembly was also worth about 2-3 degrees as the screws had loosened a little. |
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Seems BTC owed stats finally are caught up  Not for me. I am showing 100% paid when I should be showing 100% owed. |
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Will wait another couple hours before bailing out.
I am seeing the same thing. I just signed up today and it is showing 90% as having been paid despite me processing 0 transactions |
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Pool performance has been pretty bad today - so bad that I have cut over to 50btc until someone tells me its back up and working Avg hash rate over 24hours has been about 10% off what it should be in CG miner, and showing even less on coinlabs server: cgminer version 2.7.4 - Started: [2012-09-12 00:00:53]
-------------------------------------------------------------------------------
(5s):336.7 (avg):2070.0 Mh/s | Q:13526 A:32627 R:6 HW:0 E:241% U:28.2/m
TQ: 9 ST: 0 SS: 542 DW: 817 NB: 118 LW: 76128 GF: 1137 RF: 805 WU: 28.7
Connected to http://pool.coinlab.com:8332 with LP as user xxx
Block: 000001a138dc456b7c8f1c534baba74b... Started: [19:14:38]
-------------------------------------------------------------------------------
[P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
GPU 0: 53.0C 2068RPM | 520.9/510.7Mh/s | A:8014 R:1 HW:0 U: 6.93/m I: 7
GPU 1: 54.0C 2132RPM | 583.4/519.3Mh/s | A:8235 R:3 HW:0 U: 7.12/m I: 7
GPU 2: 53.0C 2204RPM | 542.4/518.9Mh/s | A:8212 R:2 HW:0 U: 7.10/m I: 7
GPU 3: 54.0C 2222RPM | 575.0/521.1Mh/s | A:8166 R:0 HW:0 U: 7.06/m I: 7
-------------------------------------------------------------------------------
[2012-09-12 19:17:28] Accepted 28a12bd7.83f915a0 GPU 1 pool 1 (resubmit)
[2012-09-12 19:17:28] Pool 1 not providing work fast enough
[2012-09-12 19:17:34] Accepted 7ab30e8c.65548378 GPU 1 pool 1 (resubmit)
[2012-09-12 19:17:36] Pool 1 communication failure, caching submissions
[2012-09-12 19:17:36] Share became stale while retrying submit, discarding
[2012-09-12 19:17:37] Share became stale while retrying submit, discarding
[2012-09-12 19:17:38] Pool 1 communication resumed, submitting work
[2012-09-12 19:17:38] Accepted f89f9242.e18c8a08 GPU 2 pool 1
[2012-09-12 19:17:39] Accepted 02f0e93b.7f619cd6 GPU 1 pool 1
[2012-09-12 19:17:39] Accepted eb5c5338.ed670171 GPU 3 pool 1
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try disabling unused motherboard devices in the bios if you have not done so; front USB, audio, firewire, etc.
powered risers may also help.
Disabled everything other than USB and sata with no luck. Must be either a driver or motherboard issue I think. I still couldn't work out why the cards run slow when 5 cards are working, their clock speed oscillates around 700mhz instead of 925 MHz under load. The 11.12 drivers seem to misreport utilization in after burner on 5 cards. When running 4 cards on 12.8 they're rock solid on 925. |
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Getting a few stales today, seen at least 2 scroll by in the last 5 mins, and 9 in about 10mins.
Generally seems to be getting less performance than mtred (until it went down today) over the last few days, although have to say the reject rate is low.
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so is it a good or bad idea to buy a 7970 now?
i don't want to use it for gaming only mining..
If its mining only, then it is a bad idea. Full stop. |
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Coinlab, could you calculate the estimated hash rate over a period of 5 minutes? It would be preferable, so i could get an credible reading. As it is it seems a bit pointless. Keep the good work  Seconded. A graph of performance over time would be even better |
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5870s are what, 150 here on the forums? Ebay has similar prices. If you can pick up a 5970 for ~250, however, I'd say that's your best bet.
I dont believe any card will fully pay for itself without selling it in december. All my models show once you factor in power usage, increasing difficulty, drop in reward and the cost of card depreciation, somewhere between december and feb is the point to dispose of your card unless your avg cost of power is very low. |
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When are you expecting to get back your ROI?
in how many days?
I am not and was not expecting a complete ROI per rig from BTC revenue alone. My model factors in a few things 1) Power cost 2) Depreciation cost 3) BTC revenue 4) Selling hardware when net mining revenue after power = depreciation cost 5) Continued usage of one rig for OpenCL work after selling the other i.e. I never expected to make a good ROI, merely to have two rigs pay for as much of one rig as possible so I can keep using it for . As a unfactored in bonus I am using coinlab to extend my rig life - not sure how well this will work yet so its not included in the model. The way I am going so far with all these roadblocks is not making a good case for continuing. The time spent alone means the whole thing has been a bit of a white elephant. Probably the only reason I am persisting is because tinkering is kind of entertaining rather than being an efficient use of my time. |
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What motherboard are you using?
Asrock H61DEL |
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What OS are you using? Try BAMT.
Windows - I want to use this rig for OpenCL as well as bitcoin if I can. Had no luck with BAMT ( https://bitcointalk.org/index.php?topic=65915.msg1177246#msg1177246) In addition to being capped at 5 cards, I am now finding that they are all only running at 80% of the clock set by AB which is highly irritating as the overall mhash is identical to 4 cards :< |
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11.12 from the website do not work with 7970, but the RC 11.12 that come on most driver discs with 7970's do and they are the ones I stick with as well
Thanks! I managed to find some on the AMD site. I can now see 5 cards working in device manager, but the 6th card still has an exclamation point - if I remove any one card the device mgr problem goes. I tried running the main card on a 1x riser instead of the 16x as well with no luck. Seems like I've gone from a hard limit of 4 to 5. Any further ideas? |
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Out of curiosity - will BAMT support 5 or 6 HD7970 cards?
it will support whatever the AMD driver supports. Usually that means 8 gpus total. Any idea what this means? (process:308): GLib-WARNING **: getpwuid_r(): failed due to unknown user id (0)
startpar: service(s) returned failure: gdm ... failed!
aticonfig --list-adapters showed 0 supported adapters |
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