Something strange is going on with FTC mining. All blocks proof to be orphan and there are no payouts. Anyone know what is going on?

That's fine, I got the thought that maybe Slush disabled it after the hack so they can not steal our accounts but I was just not sure if I am missing something.

Thank you Kruncha but at My Account I see just "Change the password" which I already did after the hack and "Delete my account". Don't have any menu for e-mail change.


Lucko, its 2:40 AM here and I am probably missing something but let me try to explain what I see...

Pool hoppers get more on shorter runs and I understand that but what is the point of score reset? On shorter runs, there won't be enough time for the score to reset and the pool hoppers will screw me again. However on longer runs they will screw me again because the score resets on each xx minutes and even though I mined for several hours, a person that is switching pools each 5-15 minutes will get just the same score as mine after 3 hours of mining?

I do not want to offend anyone here and I personally think that Slush is a great guy (impressed me quite a lot during the hack outrages) but nevertheless I just can't get this resets...

Edit: Yes, before I started these score reset posts I already had read Slush's explanation on the topic, still the resets are not making any point to me.

About the score resets I just can't see how can they help. So lets suppose the resets are happening at each 90 minutes and I am constantly mining a block for 3 hours now. For this time I got two score resets which I would normally say it is OK. However the block is found after 3 hours and 10 minutes. Now I have been mining totally 190 minutes but I get the same score as those who joined just 5-10 minutes before the block is found. What is the point of using score when it resets on given period of time?

I do not mean to offend anyone and I am actually still a noob but am I missing something here or the score reset is faulted?

PS Off-topic after the OVH hack I would like to change my e-mail associated with the account but I just do not see such option. I am probably just blind   but is it possible to change the e-mail and from which menu?

Bizaro, this is taken from cgminer:

GPU 0:  63.0C 3519RPM | 633.0M/623.9Mh/s | A:28539 R: 91 HW:0 U:  8.69/m I:13
GPU 1:  67.0C 3471RPM | 590.2M/587.0Mh/s | A:26510 R: 54 HW:0 U:  8.07/m I:10
GPU 2:  66.0C 3481RPM | 635.1M/626.0Mh/s | A:28425 R:103 HW:0 U:  8.66/m I:13

GPU 1 has lower rates because it is underclocked to 1150 MHz core and a little bit undervolted as well (Trixx voltage set to 1200 and GPU-Z is showing 1.144). I did this because it is located on the mobo itself and can not get very good cooling. The other two cards are raised with PCIe 1x to 16x risers and they get better cooling.

At the moment we are mining a single block on Slush's pool for almost 5 hours now. The worker statistics show 1851.842 MHash/s (all three cards) and total 7598 shares for this block.

When undervolting just test if the cards are stable. For instance when I was testing mine, if a card was not stable, it was restarted (the monitor blinks and looses the clock values). You can also test with 3D Mark or some stress tests. As if the mobo is fried, unfortunately I am not sure how we can really test this without putting the cards on different motherboard. However what PSU are you using? It would be easier if you can try to replace the PSU and see what is going on. I generally do not believe in coincidences but just do not see how this can happen from the undervolting.

Hi there, I also have Sapphire 7950 but got some issues with their LTC hashrate in cgminer (they were stable on similar frequencies). Could you please post the flags/settings you are using.

Thank you guys

@pekv2 Yes, I know for imaging but I just didn't have imaging software around and decided not to bother downloading. Anyway Windows 7 reinstall with drivers + miner, gpu-z etc took me ~30 minutes I lost quite some time however trying to debug why can't properly downgrade to 13.1 and also searching what changed so the MHash/s speed in 13.4 got down. Failed on both fronts and just reinstalled

@Spotter Thank you, it seems like a good guide and I bookmarked it for future reference.

I am currently mining bitcoin/sha256 and my memory is underclocked so can't really tell for litecoin. However in cgminer my settings are -I 13 -w 256. The cards are stable at 1200 core 300 memory (no crossfire) and for power GPU-Z is showing:

vddc 1.156 with peaks to 1.163
cddc current ~56 A
vddc power ~67 W
temp - from 64 to 70 top but they are not in case

Can also post a screen shot. The GPU is Sapphire with Boost @925 core stock and device ID 1002-679-A (can post link to the Sapphire site, but I am not sure if this will be violation of the forum rules).

Originally I also tested overclocking the memory and it reached about 1550 MHz stable with 1200 core so they should be good for LTC as well. I am just mining BTC at the moment as had some issues with CGMiner and windows.

Hope this helps.

I am also using 3 x Sapphire 7950 but with some cheap GB mobo. The voltage is very good (about 1.56 each) and I undervolted one of the cards to 1.119 in order to lower temperature (it runs stable at 1150/300 core/memory and the other two are @1200 core). This is running stable for almost 10 days now and do not have any issues. What you describe definitely looks like mobo/PCIe issue but I do not see how undervolting will burn the mobo. My personal guess is that it is coincidence that it happened after you undervolted one of the cards. Some motherboards can not constantly run their PCIs on higher voltage and over time the tracks are just burning. Since yours is with several PCIe x16 the cache for this to happen is small (the vendor should have done the voltage calculations) but my bet is still on this.

Try experimenting with different settings. I think the pools are calculating your mining power based on the number of shares you send. If you have too aggressive settings for your GPU, then you will just won't send the shares on time.


Check your Windows power settings. When I first started mining, my workers were stopping on each 30 minutes or so. Then I found that Windows is set to sleep if no activity. Silly me! I lost quite some time then. Just go to Control Panel -> Power check the advanced settings and remove any kind of HDD, VGA, PCI suspension and sleep/hibernate.

Yes, I am mining there for almost 10 days now. Total 2500 MHash/s power but the score system is kind of messy. When we start a new block, the score starts to raising over time and after like 30 minutes I reach several millions in score but a minute later it is back to 0. I am sure I have no disconnects. From what I understand from Slush's info, it the more time you mine (without disconnecting) the better score you get and I just cant get it why it gets to 0 over time. For longer blocks mining like 1-2 hours and more the score may reset more than 10 times. Maybe I am missing something but the way it looks to me, it is not good.

PS Yes, I understand the point of score system to fight cheaters but just think there is something wrong here.
PPS From the pool posts Slush seems like a great guy and can't say anything against him

From 630 to 670 MH/s using Sapphire 7950 OC (stock 925/1250) clocked to 1200 MHz Core and 300 MHz memory. GPU-Z shows VDDC @ 1.56, Fans at 100%, ambient temperature about 30 degrees and core cant get above 68 degrees but the GPUs and MB are not in case Got lucky to chose Sapphire and now I highly recommend these cards.

I tested 13.4 but my bitcoin hashrate dropped from 630 MH/s to 560 MH/s. Also after that I was unable to uninstall the drivers and revert back to 13.1 (even with driver sweaper). Cgminer was also crashing upon startup. I had to reinstall Windows 7 64 bit to get all fixed. Using Sapphire 7950 boost OC @925 MHz stock version (of course my GPUs are overclocked over these values).

I do not know how is on Linux but if you have similar setup, just do not bother with 13.4.

Hi there, I have similar problem with CGMiner and "error -5: Enqueueing kernel onto command queue gpu0 failure, disabling!" (in mine case for two GPUs without crossfire). This seems to have happened since I tried to use "setx GPU_MAX_ALLOC_PERCENT 100" in Windows in order to increase the maximum thread concurrency. Greek, did you modify this value as well?

I tried to delete the registry keys for GPU_MAX_ALLOC_PERCENT but it didn't help. Now CGMiner is always showing this and stops when I try to mine litecoin. Bitcoin mining works fine though.

I tried reaper as well but it didn't work even with 6144 thread concurrency. I also tried GUI Scrypt miner which appears to be based on CGMiner as well and it works fine with 8192 for thread concurrency.

I am using Windows 7 Ultimate x86_64 and tested it with cgminer 3.0 and 3.1 (reaper was the latest version) but no difference. Does anyone know how to fix this?