7990's generate a lot of heat. I have 2 in a water-cooled system with 2 480 rads and I still can't max out the hash rate because the temp starts going way up.
maybe with a open and bigger case and adding some fan you could improve your performance productivity.. how many litecoins are you mining daily? He's using water cooling and massive radiators. The thermal density is just too high with those cards (or maybe he has high ambient temps). |
|
|
|
I used them. The 7850 is awesome go for it! I used twin fan 2Gb models and they were always cool and quiet.
Two are as powerful as a 7970 (2x1024 Stream processors) but it's only 2x 6-pin (2x75W) so are way lower power consumption!
Only the 7990 2nd Ed, (2x 8Pin) can touch them on power efficiency.
That's not how you measure a card's power efficiency. You calculate the delta between idle and load states using a kill-a-watt and divide the hashrate by that delta (assuming the idles states of all cards will be more or less within 5 watts). The higher end cards are usually more efficient since they have one less PCB to power and less memory. Undervolting and ambient temps would play a bigger factor than anything else. |
|
|
|
didn't know lego could do that lol, nice 1 DrG
Not my rig, see the post above mine (it's his). Considering how much Legos go for nowadays I think getting a custom built aluminum rig for GPU mining would be cheaper. If you go to a Lego store the big blocks even purchased in bulk are pretty pricey. Maybe if a knockoff was available... |
|
|
|
can BTCguild get merged mining for DEV/Ixo like cex has?
It's in the works. Please read the last 2 pages for further details. |
|
|
|
Diff goes up, cex ghs price goes down. Not as much as I'd like, but their prices beat the ass off of preorders that take forever / never arrive.
Plus the Ghs at cex being liquid makes them instantly tradeable on the highs and lows, which is harder to do with actual mining hardware. Ain't no other circumstance where you can spend a mining reward on Ghs as soon as you get it, and that time saved = lesser losses.
I agree with everything you wrote. You don't lose as much money with cex.io as you do with mining hardware. My question is why do you choose to lose money? This. . I buy Ghs when the price is low, Sell it when it's high, and keep doing that, all the while getting mining rewards at any time I hold Ghs. I encourage a couple of friends who are my referrals to do the same, too. EQUALS PROFIT Most of these threads that go "why do ppl use cex" forget that the Ghs you mine with can be sold any time, and if you sell them for more BTC than you bought them, then you've come out in profit and any mining you've done at cex with it has technically been for free. For example: here's my cex graph. it goes up from the start as i buy more Ghs, then on the 5th I started withdrawing all my mining rewards and trading only the Ghs i have to increase them. After a not-so-profitable day to hold Ghs (that big dip) it's been ups and downs, but overall upwards.  just buying Ghs at cex, sitting on them and only considering your mining rewards as profit from it is only half the game. The Ghs themselves can be profitable too now the price has ups and downs. But what do you do if CEX.IO goes belly up? Not saying it will happen, but 50BTC was as big as they currently are and they effectively ran off with people's money with no real consequences as of yet. If the price drops to the true market price no realistic amount of trading will be able to undo your losses. At least if you're flipping on an exchange (which can also run of with your money theoretically) you're either holding BTC or fiat. Here you would be holding GH/s which are guaranteed to be 30% less every 11 days (for the next 6 months anyways). You seem to enjoy trading so I will not attempt to discourage you. For an average person trying to enter the bitcoin community you would be better off acquiring coins on localbitcoins or an exchange - at least from an investment point of view since once you acquire them there's no risk other than security threats. If you're looking to make profits by flipping, BTCe or any of the other exchanges are less of a risky proposition (since they're already registered with government agencies). |
|
|
|
|
Fan is dead or needs lubrication. You can either try to fix it with youtube video guides or RMA it. No need to mess with a new PSU.
Do not continue to mine with a dead fan though. Even if GPU temps are fine the Voltage Regulation Modules (VRM) will overheat and when those die it will need an RMA for sure.
|
|
|
|
|
You can use one worker per device, per rig, or even for all your miners. It should not make a difference with most pools. The only disadvantage is having to configure more worker names.
The advantage is easy to see - if a single unit or device stops mining it's easier to notice with multiple workers. If you gave everything the same worker name you would have to stare at the hashrate all day and look for a drop in speed.
|
|
|
|
I guess it depends on how you invest your BTC in Cex. Definitely I won't buy any hardwares from them. The price of hardware is 10 times higher than others, for example, KNC, 3THs at 12 BTC or so. Buying hardware is stupid and won't get back any ROI.
But, what if you buy some GHs and use it to mine; after mining a while, you exchanges your GHs into BTC at the same rate of buying it. You get some profits, right? To be simple, you win if you buy GHs low and sell it high or at the same rate. Risk lies in all the investments. All depend on you.
Yes, if you are able to buy GH/s at price X, mine for a few days, and sell at price X then you keep the revenue from that GH/s as profit. The problem lies in the fact that the $ of each GH/s should be going down as equipment becomes more powerful per $, and certainly the BTC/GH should be going down as each GH you own is making less and less each difficulty. Irrespective of whether the people warning others are doing it for selfish (to keep difficulty down) or altruistic (to keep new users from wasting money) reasons, the fact remains cloud mining in it's current state is a losing proposition. Sure you can make money, but you will be in the minority. It's not impossible, it's just unlikely. As the price/GH deviates farther from the true earnings potential, the likelihood of coming out a looser is even higher. If you like gambling there's option that provide a better risk/reward ratio. If you think CEX.IO is the coolest thing since sliced bread, well nobody should be stealing your happiness. |
|
|
|
CPU : 4MH/s (120w)
GPU : 50MH/s (460w)
USB BE : 333MH/s (5w)
BFL Jala-something : 12000MH/s (35w)
.... so yes, ASIC work faster (and better).
Very interesting! Thanks! People still seem to be missing the point. ASICs do not solve faster, they just have the ability to solve more at the same time. My point is, with the puzzle difficulty getting higher and higher, wouldn't we need equipment that actually solves a single hash faster? Or is that not a factor? ~Foyz ASICs do "solve" hashes faster. It takes about 71MH/s for a share (dif 1) per minute. A 7970 with 700MH/s, for example, was submitting about 10 shares per minute. The KNC Jupiter does about 10,000 shares/minute. I think the problem you're complaining about is that blocks are not solved faster. Well that's why the difficulty keeps going up - to accomodate the fact that these faster ASICs are being added to the network and solving blocks faster than 6 per hour on average. If blocks were solved even faster then the rest of of the 21million BTC would have been mined with the introduction of ASICs. |
|
|
|
Eclipsemc Also has the WORST PPS rate out there on the Internet
It appeared to be better than btcguild but maybe I misread it. Either way, risk is on them unless you leave your mined btc there. Eclipse PPS fee is 5% but you'll get so many stales and disconnects it's not even funny. BTCGuild fee is 7.5% for PPS. |
|
|
|
|
I'm running from CA on US servers and not experiencing any problems or drops in hashrate.
|
|
|
|
|
Well leave it to the media to explain that people acquired wealth by mining in the past, but they neglect to explain that current mining hardware is a dud deal.
Oh well, the noobs will support the network and subsidize it with their own greed.
|
|
|
|
|
DR9gMcQAKLZ6thmdPUHWMjuiuvKY7NHnc5
Thanks
|
|
|
|
|
ARG: AR2yKa5LRXKVuic6LWuY3YThUKLERKP3Hw
DGC: DGLsL1cgQq8scZToucRd5DteAjGKZLwdeD
Thanks!
|
|
|
|
|
I tried the pool for 48 hours on scrypt mutliport and have to say I'm very disappointed with the performance. The pool website is great except the worker notification is kind of lacking. The problem seems to be stales/rejects. I was averaging 8-12% stales depending on the rig (irrespective of Linux/Windows and geographic location since I'm mining in 3 US states) whereas I was always getting less than 1% stales at most other major pools. My DOGE coin earnings (pretty much the only coin mined) were less in BTC value than what I would have earned at other LTC pools sadly.
I wish you luck on the pool but the stale rate needs some work before I would consider throwing my farm back at it.
|
|
|
|
2 weeks with no updates!?! I'm having withdrawals  |
|
|
|
|
Poll is not specific. There are 2 kinds of ROI - 1) fiat ROI 2) BTC ROI
1) fiat ROI will vary day to day as BTC price changes but I'm pretty sure most everybody before April orders will have made fiat ROI barring bad devices
2) Not one single BFL device every made will achieve BTC ROI unless it was given as a free gift (all those promo units BFL sent out to the tech media). Very few devices ever made BTC ROI other than CPUs, GPUs, FPGAs.
|
|
|
|
|
Show Posts
