Done. I would love to see Feathercoin added ahead of Litecoin. I’m also amazed that MtGox still exists, and that it only has one (crypto)currency.

[quote name=“silentgaps” post=“9479” timestamp=“1370391676”]
can you try erasing this -g 2.

btw, don’t forget to put this --failover-only, to enable failover-only.
like these
-o http://127.0.0.1:1111 -u 1 -p 1 --failover-only -o http://p2pool.org:9377 -u XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX -p password
[/quote]

I removed “-g 2”, and this decreased the speed of GPU0 below the normal speed, but increased the speed of GPU1:

[code]GPU 0: | 508.5K/507.9Kh/s
GPU 1: | 91.87K/93.08Kh/s[/code]

[quote author=RIPPEDDRAGON link=topic=1208.msg9756#msg9756 date=1370453772]
How many monitors are running on the machine with this problem?
[/quote]

I have been running this machine headless via RDP; perhaps now is the time for me to try some dummy plugs, in that case. I gather one per card is what is generally recommended. I will report back.

[quote name=“sl1982” post=“9455” timestamp=“1370383558”]
So you are saying if you have one card in it hashes at 1/8th the speed and if you have two then the first runs full speed and the other does 1/8th?
[/quote]

That’s right - and it’s always this way round:

[code]GPU 0: | 670.7K/670.3Kh/s
GPU 1: | 84.21K/83.72Kh/s[/code]

[quote author=zythen link=topic=1208.msg9457#msg9457 date=1370383630]
Sounds like you may have narrowed it down to an issue w/ the MB.
[/quote]

Yeah, it’s looking that way. I suppose this screenshot from GPU-Z isn’t looking too good, either, come to think of it.

[IMG]http://gpuz.techpowerup.com/13/06/04/2c9.png[/img] [IMG]http://gpuz.techpowerup.com/13/06/04/rb.png[/img]

You can see that the current is much higher in the second screenshot; I suppose now it’s just a case of finding a smoking gun (outside of just mining) before I can get ASUS to RMA the motherboard.

Good people of the forum, I need your help. I have three Sapphire 7970s [url=http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1481&psn=&lid=1&leg=0]http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1481&psn=&lid=1&leg=0[/url], which had all been fine mining at between 660-670kh/s for the last couple of months. One is on an

Asus P6T Deluxe Version 2
Core i7 920
12GB RAM
450W bequiet! PSU

running with

[code]cgminer --scrypt -o http://127.0.0.1:1111 -u 1 -p 1 -o http://p2pool.org:9377 -u XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX -p password --auto-fan --gpu-engine 1008 --gpu-memclock 1675 --thread-concurrency 8192 -I 13 -g 2 -w 256
[/code]

the other two are on an

Asus P8B WS
Xeon E3-1230
8GB RAM
1000W Zalman PSU

using

[code]cgminer --scrypt -o http://127.0.0.1:1111 -u 1 -p 1 -o http://p2pool.org:9377 -u XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX -p password --auto-fan --gpu-engine 1008,1008 --gpu-memclock 1675,1675 --thread-concurrency 8192,8192 -I 13,13 -g 2 -w 256,256[/code]

Recently, though, GPU1 on the Asus P8B WS started mining at exactly one-eighth speed, which I initially thought could have been some kind of hardware problem, but I then swapped the cards out, tried every combination, and found that any one of my GPU cards on the P8B WS will run a 1/8th speed, unless there are two cards installed and it is the second card; also, all three are fine on their own in the other machine. I tried the first cgminer configuration above with the machine with two GPUs, but had the same results. I am using Windows 7 x64 and have had the same results with both beta and stable ATi drivers. Since the issue started, I tried to configure the machine with Xubuntu, then Ubuntu, then Debian, then gave up and reinstalled Windows. I have also tried each of the GPUs in three of the four accessible PCI-e 16x slots (including with a ribbon cable) on the P8B WS, but this didn’t make and difference. I tested with a SHA-256 currency as well, and found that the card in this case mined at exactly 1/2 the speed it should have been (in case that helps).

Please let me know your thoughts - I’m not aware of having changed anything just before the issue started :(

[quote name=“Nutnut” post=“9308” timestamp=“1370346180”]
Good point. Still liking the idea of the personal pool just to make my life even more complicated. Anyone ???
[/quote]

There shouldn’t be any need to change the wallet setting or to create your own pushpool. When solo-mining I recommend adding a p2pool with stratum as a backup pool. This way, your miner will be notified of any new blocks very quickly, so you won’t still be mining an old block.

These days I’m in Nottinghamshire - I’m from London originally. Are you from the UK as well?

Yup, I pool mined for a bit at first, but I’ve found nine of my own blocks in total so far, and am very much looking forward to the next difficulty decrease :)

When you are solo-mining, the only time that your efforts are rewarded is when you actually find a block. Every time you calculate a hash when you solo-mine, there is a miniscule probability that you will find a block. However, over the course of hundreds of billions of hashes (a few days at 2MH/s), the probability that you won’t have found a block grows smaller and smaller. Over time, this will even out quite nicely, and your time per block will be:

Block time = Difficulty * 2^32 / Hashrate

So you are no more or less likely to find a block in the next minute if you have just found one five minutes ago, or if you haven’t found one for a week, but the probability of you being lucky or unlucky (overall) will grow smaller and smaller over time. So just think of it in terms of the longer you do if for, the more chances you are giving yourself of getting the block reward.

I chose to solo-mine because my expected time to a block is relatively short (3.3 days), so that I can see exactly what’s going on, to avoid pool fees, withdrawal thresholds and limits, and because pools can be less efficient for various reasons (downtime, DDOS, block witholding attacks, fraudulent operators and users (vis. the recent stratum vulnerability) in some cases). You would want to use a pool if the expected time for a block was very large (eg. Bitcoin c. 300 days), and you couldn’t handle the variance, or if block times were extremely short (eg. 5 seconds) during a mining rush, and a pool’s better internet position might mean that their blocks were less likely to be orphaned.

And Pyxis - I’m not aware of a way of getting the block reward of going somewhere other than feathercoin-qt; perhaps an additional program could automatically forward the funds to an address of your choice.

I am an enthusiastic proponent of solo-mining. I find it largely immune to DDOSing (unlike pools), and very easy to set up. I do recommend that you add a p2pool with stratum as a cheeky backup pool to ensure that you are notified of new blocks promptly (which you can do in cgminer by specifying a second -o -u- and -p).

Some people will be put off by the variance, but as long as you plan to be mining for a few multiples of the expected time for a block with your hashrate (so practically everyone), this variance will quickly even out, and you won’t be penalised for starting and stopping, as you would be with PPLNS, or have withdrawal thresholds and fees. It’s important to think about it in terms of probability, in that the longer you do it for, the more it will tend to the expected value. And difficulty is only going to decrease in the near future, which will make variance even less of an issue.

Hi there folks, I’m glad to joining you here. I’ve been solo mining for quite a while now, using cgminer, a p2pool for backup, and my trio of 7970s. I’m looking forward to Feathercoin’s glorious future, and I’m totally stoked about all of the good work that has been going on around here.