I have a drop in performance of the second card as it's sitting in a PCI-e x4 slot. Alone, gpuminer0 (sits in a PCI-e x16 slot) runs ~23 M/s so the effect seems significant.
The MOBO packaging has an AMD Crossfire badge, so I didn't even check. Something to look out for.
I'm on Ubuntu 15.10 with GTX 960 2GB. I'm getting around 10Mh/s. Can someone explain to me why my nanopool chart looks something like this? It drops to 0Mh/s a lot. then, comes back. After coming back I get all sorts of weird Mh/s reports from 8.2 all the way to 44Mh/s!
This issue has already been answered on another thread a few days ago.
You should only compare what you see on ethminer with your pool's Average hashrate over the last 24h. The pool only estimates your hashrate given the amount of share you submitted over a short period. Given the fact that finding a share is quite random, you may alternate some periods with high luck (44MH estimate), with less lucky periods (0MH). If you take a 24h period, the variance will be much lower, and you should approch the numbers of ethminer, but even there you may notice up to 10/20% difference over the days.
This issue has already been answered on another thread a few days ago.
You should only compare what you see on ethminer with your pool's Average hashrate over the last 24h. The pool only estimates your hashrate given the amount of share you submitted over a short period. Given the fact that finding a share is quite random, you may alternate some periods with high luck (44MH estimate), with less lucky periods (0MH). If you take a 24h period, the variance will be much lower, and you should approch the numbers of ethminer, but even there you may notice up to 10/20% difference over the days.
Thank you for your explanation. I was thinking that something was wrong with my miner at times. Your explanation is much appreciated.
I have a drop in performance of the second card as it's sitting in a PCI-e x4 slot. Alone, gpuminer0 (sits in a PCI-e x16 slot) runs ~23 M/s so the effect seems significant.
The MOBO packaging has an AMD Crossfire badge, so I didn't even check. Something to look out for.
The slot doesn't make a difference, half of my cards are in x1 slots.
Dumb question. I see coinotron averaging my rig at 84-90Mh/s for (48 Hours) while real benchmarks (taking into account real block size) should be 125-130Mhs. Way too big difference. Sometimes it peaks close to max potential so it can be achieved ... Anyway question is for a 150Mh/s - 175-Mh/s rig should I solomine or poolmine? Where would I see the actual hashing power of network and how do I calculate my solomine real (potential) rewards? I feel like pools are not maxing out potential of my rig not to mention do not reflect the costs of investment and running it. Currently 3x290 (26.5 Mh/s)+ 1x7990(44.5Mh/s).
I tried on Win 10 and got about half that!! Shocking!!
These GPU's just run amazingly quiet and cool. Both at full tilt and only 65degrees C and fans at 40% in a standard gaming tower with stock air cooling. 330W Power consumption for whole system makes them very cost effective solution.
my R9 290X alone pulls 31 MH ! NVIDIA GPU are bad for ether mining.
Hey guys one quick question. How many r9 380 can I crossfire on one board? The board has 5 pci and I bought the 1x to 16x powered riser. So could I put 5 r9 380 on it in crossfire? I'am not sure if they only support 2 in crossfire. I have other pc's I could use but I wanna be sure before I do anything. Thank you.
Hey guys one quick question. How many r9 380 can I crossfire on one board? The board has 5 pci and I bought the 1x to 16x powered riser. So could I put 5 r9 380 on it in crossfire? I'am not sure if they only support 2 in crossfire. I have other pc's I could use but I wanna be sure before I do anything. Thank you.
You dont need crossfire when mining with more cards.
ok, so amount of mem on card does not matter. good. i had an old gtx 970 so tried that and it says while mining around 17.3mhs with ubuntu 14.04 but i think wattage/h is pretty high with this card no? will try to get a good bargain on a couple of r7 370's then.
edit: XFX Radeon R7 370 is that any good? available for 136 euro's.
Hey guys one quick question. How many r9 380 can I crossfire on one board? The board has 5 pci and I bought the 1x to 16x powered riser. So could I put 5 r9 380 on it in crossfire? I'am not sure if they only support 2 in crossfire. I have other pc's I could use but I wanna be sure before I do anything. Thank you.
You dont need crossfire when mining with more cards.
R7-370's are IMO the best bang for your buck right now, if you have the spare motherboards and power to spare. (Slightly less efficient than 380-390 models.
Hey guys one quick question. How many r9 380 can I crossfire on one board? The board has 5 pci and I bought the 1x to 16x powered riser. So could I put 5 r9 380 on it in crossfire? I'am not sure if they only support 2 in crossfire. I have other pc's I could use but I wanna be sure before I do anything. Thank you.
You dont need crossfire when mining with more cards.
Seriously I can just plug them all in and have np with all 5 r9 380 mining?
Hey guys one quick question. How many r9 380 can I crossfire on one board? The board has 5 pci and I bought the 1x to 16x powered riser. So could I put 5 r9 380 on it in crossfire? I'am not sure if they only support 2 in crossfire. I have other pc's I could use but I wanna be sure before I do anything. Thank you.
You dont need crossfire when mining with more cards.
Seriously I can just plug them all in and have np with all 5 r9 380 mining?
You would need to plug them in one at a time and boot into windows to make sure each one is recognized. If you use Win7 you will have to modify the registry in order to use the 5th GPU. There's an app that assists with this.
@Murz how did you undervolt your vapor X cards ? I tried using ati winflash and VBE to modify the voltage even slighting and the cards freeze up when I try to mine. Had to roll back to stock bios.
@Murz how did you undervolt your vapor X cards ? I tried using ati winflash and VBE to modify the voltage even slighting and the cards freeze up when I try to mine. Had to roll back to stock bios.
likely undervolted too far, some cards will only handle very small reductions without also reducing core clocks.
Cards that came at ~1.25v will almost certainly be stable at 1.2v, likely stable at 1.18v, probably stable at 1.15v if clocks are reasonable, possibly stable at 1.10v if underclocked to 1000mhz or below, etc....
Comments
Actual rate is ~ 41 M/s
I have a drop in performance of the second card as it's sitting in a PCI-e x4 slot. Alone, gpuminer0 (sits in a PCI-e x16 slot) runs ~23 M/s so the effect seems significant.
The MOBO packaging has an AMD Crossfire badge, so I didn't even check. Something to look out for.
You should only compare what you see on ethminer with your pool's Average hashrate over the last 24h.
The pool only estimates your hashrate given the amount of share you submitted over a short period. Given the fact that finding a share is quite random, you may alternate some periods with high luck (44MH estimate), with less lucky periods (0MH). If you take a 24h period, the variance will be much lower, and you should approch the numbers of ethminer, but even there you may notice up to 10/20% difference over the days.
gigabyte windforce r9 280x 1170/1500 1,2V
gigabyte windforce r9 280x 1100/1500 1,14V
together around 72Mh/s using proxy on dwarf pool
using original bios
anyone care to share modified bios or suggest better settings for more hash power? thx
Way too big difference. Sometimes it peaks close to max potential so it can be achieved ...
Anyway question is for a 150Mh/s - 175-Mh/s rig should I solomine or poolmine?
Where would I see the actual hashing power of network and how do I calculate my solomine real (potential) rewards?
I feel like pools are not maxing out potential of my rig not to mention do not reflect the costs of investment and running it.
Currently 3x290 (26.5 Mh/s)+ 1x7990(44.5Mh/s).
Maybe if we rise the Graphics and Memory clocks to 1493MHz/7200MHz with this guide? Increase-performance-gpu-boost-k80-autoboost/
2gb is supposedly not enough and yet i see becnhmarks here with 2gb cards??
i want to build an ubuntu rig.
what cards would be the most power efficient compared to max hashrate?
How many r9 380 can I crossfire on one board? The board has 5 pci and I bought the 1x to 16x powered riser.
So could I put 5 r9 380 on it in crossfire? I'am not sure if they only support 2 in crossfire.
I have other pc's I could use but I wanna be sure before I do anything.
Thank you.
i had an old gtx 970 so tried that and it says while mining around 17.3mhs with ubuntu 14.04 but i think wattage/h is pretty high with this card no?
will try to get a good bargain on a couple of r7 370's then.
edit:
XFX Radeon R7 370
is that any good? available for 136 euro's.
Seriously I can just plug them all in and have np with all 5 r9 380 mining?
2 radeon 290x
3 radeon 280x
104 mhs
2X Sapphire R9 280 Dual X
All cards undervolted to 1.081 mV
88 MH @ 780 watts
Cards that came at ~1.25v will almost certainly be stable at 1.2v, likely stable at 1.18v, probably stable at 1.15v if clocks are reasonable, possibly stable at 1.10v if underclocked to 1000mhz or below, etc....