The problem is that the motherboard itself is unable to draw that much power from the psu through the normal atx connectors to pass to the pcie ports.
Motherboards that support four gpus have an extra port to plug in the psu, so they don't need powered risers for the fourth card.
For a motherboard that doesn't have that, you need powered risers after the third card.
Thanks, what website can I buy powered risers from in the US? Also, would something like this help, instead of buying powered risers? http://www.youtube.com/watch?v=ItvBnffj1No&hd=1 |
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Are you using powered risers? If not, and your motherboard isn't a newer board that expressly supports quad SLI/Crossfire, your GPUs may not be getting enough power through the PCI-E slots. The fix would be to use at least one powered riser.
Another possibility is that your PSU has multiple rails, and the one that you have all the GPUs on doesn't provide enough power. If that's the case, put the fourth GPU on the other rail using molex adapters.
I'm using Risers, but not powered ones, 3 are on riser, 1 is plugged in on the board. So in theory, wouldn't it still reboot if I only mine with the 3 on the riser? but that's not the case, even when I mine with the 3 on the riser, the system does not reboot. But once I mine with 4, even though the other 1 is plugged into the board, the system reboots? btw, I have no idea whether my PSU has multiple rails, this is the one I have: http://www.amazon.com/gp/product/B003O8J11Ythis is the 7950 I'm mining with: http://www.amazon.com/gp/product/B007581QHG |
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I have a 4x 7950 set up, temperatures below 85C, 1200W PSU, mining with cgminer on win7. The system always reboots after mining for a few minutes. But it won't do it if I disable one 7950 and mine with 3x 7950.
What's the problem?
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I got enough litecoin to dump on a 7950 this will jump my hash rate from 871khash/s to 1471-1521khash/s, or should I hold my ltc?
Seriously.
What do you guys think? Hold or dump?
I think LTC mining is going to be extremely profitable. I'd buy a card, but I'd go for the 7970. Don't listen to this guy, 7950 all the way. I'll lay it out for you and show why serious miners do 7950. 7970 gets 750 according to crypto. Most people get less however. 7950 gets 650 though most get less. Both can get the high numbers with much testing and work. Based off of top end numbers: 7970 = $400 = 1.875 h/s/$ 7950 = $290 = 2.24 h/s/$ per card, yes, but you get something like 3h/$ if you buy a 5830, would you be buying a 5830? no because there's only so many you can fit on a rig, before you have to buy another set of mobo/ram/cpu etc.. The card that give bigger hash per PCIE slot does have its advantages, especially if space is of concern. |
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https://bitcoin-central.net/Were hacked....I maybe slowpoke.jpg but at least they claim they have full reserve...does BTC-e make this claim?  BTC-E are Russian. In Russia, Exchanges don't get hacked, Hackers runs the Exchange. |
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pirateat40 of course, highest amount of BTC scammed ever, non on the list comes even close, probably none will come close ever in terms of BTC amount.
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Even IF (a big IF), mtgox opens LTC trading, that's nothing new, it only takes the business from BTC-E. Anyone who wanted to buy/sell LTC, could already do it before. I bought 6 figures in LTC by buying Bitcoin on gox, send to BTC-E, obtain LTC. I don't see why should LTC value rise due to such stupid reason. Still need massive amount of merchant support, otherwise the value should be at $0.06 where it belongs.
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Meanwhile, friedcat starts thinking of charging a fee per transfer..  This would be good for the PTs no? people will start trading in the PTs instead of paying hefty transfer fee to trade privately. This would also take some burnden off Friedcat since I can imagine managing all these share transfers must be a nightmare, i wouldn't want to do it. |
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bouncing between the walls: Man that looks fun, got to try it. |
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Tod ya Xjd was a scammer, bad liar too.. stay away
I don't think so, even though I haven't received my LTC yet. I believe I will once his client catch up with the blocks. I am the "LRDpNJM5nkXFBDoxWRCk5hicvT7TrXQZ3c" address. Anyway, I'm going to sleep now, if you guys see 15 LTC show up at my address in a short while, then xjd has done the transaction faithfully. SENT SUCCESS! 状态：1/未确认，同过 6 节点组广播 日期：2013/4/24 11:39 到：LRDpNJM5nkXFBDoxWRCk5hicvT7TrXQZ3c 支出-15.00 LTC 网络金额： -15.00 LTC 交易ID： 7d96cbc0b080f7b1989ceac1f4421fea772bafe1082b385307bfae0d65c28312 Yes I have received the 15 LTC, nice trade, Thanks my brother. +1 for xjd1987 |
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Tod ya Xjd was a scammer, bad liar too.. stay away
I don't think so, even though I haven't received my LTC yet. I believe I will once his client catch up with the blocks. I am the "LRDpNJM5nkXFBDoxWRCk5hicvT7TrXQZ3c" address. Anyway, I'm going to sleep now, if you guys see 15 LTC show up at my address in a short while, then xjd has done the transaction faithfully. |
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不会，我的已经卖了1 BTC。这种好事常有就好了，呵呵。
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I'm 5 figures on LTC... life is good. I am 6 figures on LTC  (ask people in my trading thread who I sent LTC to if you want proof) Did you just adopt at it's birth, were you wealthy enough to buy a shit ton or what? Just how do you people get so many of one coin? I'm enacting this grand plan to MAYBE get 2000 of a coin this week, which will be the most I've ever had. LTC was really cheap just over a month ago, I actually also had 6 figures in LTC, and I only spent about 200 BTC to get it. But then regrettably, I sold nearly all of my LTC as soon as their value doubled. Making a small profit, but then completely missed the bigger profits that would have made me a 1/2 millionaire. (LTC was $5 at the height of the rise)  Right now I only have several thousand in LTC left. |
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Testing if I can post outside the newb section yet, I am definitely interested in buying a few of these.
You and 10,000 others, and people still wondering why AM shares is at BTC1.1? it's still highly undervalued imho. |
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I lost 3 LTC from my account, that was 25% of my balance on the pool. I was not mining at the pool for a long time, but had a small balance there, the pool operator punished me while I had done nothing wrong, and did not profit from any of his mistakes.
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I will continue to petition them via my method of never buying their product.
+1, I am a proud non-apple user for the last 20 years, zero apple product bought. Regrettably my wife bought a iPhone 3gs against my advice. Though she quickly grew to hate the iPhone when compared to my mighty Android phone, and she became jealous of all the cool stuff I could do on my android. Now she owns android phone, and will only buy android phone in the future. Though she still likes her Macbook Air... |
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rNexqWdz7q16e6PPBDsD2XxxzFS64SAEYS
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So can somebody explain to me, how come that the bets kept on flowing even with the domain down (that's a fact, right?)? DNS caching? Are there alternative routes to using this service besides satoshidice.com?
What is there to understand? don't you send a bet to a Bitcoin address? the betting system relies on Bitcoin network only. The satoshidice.com frontend website serves only to see some stats and to copy down the betting address, which is also available elsewhere like blockchain.info |
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Your first mistake: assuming 35% month-to-month rise. Why the fuck would difficulty rise 35% every month? Does ASIC hardware manufacturers magically increase production by 35% every month? kokojie: by the time the blades have shipped, cleared customs, and are online, difficulty will probably be 10M. From then, assuming a 35% month-to-month difficulty increase (which is conservative IMHO - it has increased 100% month-over-month in the last 2 months), and assuming it stops increasing after month 12 (which is unrealistic), and assuming free electricity (also unrealistic), the math gives:
Month 0 (10.0M diff): mined 16.45 BTC, total = 16.45 BTC
Month 1 (13.5M diff): mined 12.18 BTC, total = 28.63 BTC
Month 2 (18.2M diff): mined 9.02 BTC, total = 37.66 BTC
Month 3 (24.6M diff): mined 6.68 BTC, total = 44.34 BTC
Month 4 (33.2M diff): mined 4.95 BTC, total = 49.29 BTC
Month 5 (44.8M diff): mined 3.67 BTC, total = 52.96 BTC
Month 6 (60.5M diff): mined 2.72 BTC, total = 55.68 BTC
Month 7 (81.7M diff): mined 2.01 BTC, total = 57.69 BTC
Month 8 (110.3M diff): mined 1.49 BTC, total = 59.18 BTC
Month 9 (148.9M diff): mined 1.10 BTC, total = 60.28 BTC
Month 10 (201.1M diff): mined 0.82 BTC, total = 61.10 BTC
Month 11 (271.4M diff): mined 0.61 BTC, total = 61.71 BTC
Month 12 (366.4M diff): mined 0.45 BTC, total = 62.16 BTC
Month 13 (366.4M diff): mined 0.45 BTC, total = 62.61 BTC
Month 14 (366.4M diff): mined 0.45 BTC, total = 63.05 BTC
Month 15 (366.4M diff): mined 0.45 BTC, total = 63.50 BTC
Month 16 (366.4M diff): mined 0.45 BTC, total = 63.95 BTC
Month 17 (366.4M diff): mined 0.45 BTC, total = 64.40 BTC
Month 18 (366.4M diff): mined 0.45 BTC, total = 64.85 BTC
Month 19 (366.4M diff): mined 0.45 BTC, total = 65.30 BTC
Month 20 (366.4M diff): mined 0.45 BTC, total = 65.75 BTC
Month 21 (366.4M diff): mined 0.45 BTC, total = 66.20 BTC
Month 22 (366.4M diff): mined 0.45 BTC, total = 66.65 BTC
Month 23 (366.4M diff): mined 0.45 BTC, total = 67.09 BTC
...so buyers will not even mine the 75+ BTC they paid for. Consider also that my math is generous as it assumes the same difficulty throughout each month (when it will in fact increase every 2016 blocks). And consider that two years from now, there will be even power efficient ASICs, more intense mining competition, etc.
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so what's the point of mining after the 1st block?
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