CCminer(SP-MOD) Modded GPU kernels.

[tbearhere]

POWERED USB RISERS--

Powered USB risers cost about the same as the cheap and dangerous flat-cable risers picured a few posts back.  They power each card with a 4-pin MOLLEX or SATA adapter, not to the PCIe port, but to the goldfingers of the card, just like the motherboard slots.

They are more safe, and the USB cable is more flexible.      --scryptr

P.S.  SP_ release dot 70 mines Neoscrypt at 340kh/s on my GTX 960, rather than 330-335kh/s with release dot 69. However, a very brief attempt at solo-mining failed.  I'll try again later.       --scryptr

curious......on the usb side, what would be the results of me adding one of those hubs and tring to run 8 GPUs off pcie ?

PCIe DAUGHTER HUB/SPLITTER--

I've been asked this before, if we are talking about the same thing.  I purchased a 1 PCIe-to-4 PCIe board, it worked for GTX 500 series and below.  I could not get it to work with GTX 700 series nor any AMD cards.  There is a picture of one of the boards several pages back.  However, a simple USB hub would not work, the circutry could not handle the information from multiple cards on one line.       --scryptr

I found one that is powered 1 to 4 splitter and I think I posted it in the cuda thread.  djm and I talked about it and found the technology would be a pain to work out or maybe it was to expensive at the time for a simple 750ti rig.  Maybe for the higher end cards it will be worth it. I'll see if I can find it.

[Cryptozillah]

What i use on all my rigs. I use H81 boards in all the rigs but not using the extra voltage inputs on the mobo. Just powered USB raisers split up on two separate rails from the psu. Overkill but also bulletproof = good night sleep

[antonio8]

I am no expert in this psu/riser stuff but I read that when using the daisy chain power molex connectors to never use more than 2 connecting for power.

Something about they are not designed to have a lot of power running through them.

[bathrobehero]

What i use on all my rigs. I use H81 boards in all the rigs but not using the extra voltage inputs on the mobo. Just powered USB raisers split up on two separate rails from the psu. Overkill but also bulletproof = good night sleep

I have pretty much the exact same config.

I am no expert in this psu/riser stuff but I read that when using the daisy chain power molex connectors to never use more than 2 connecting for power.

Something about they are not designed to have a lot of power running through them.

I put 2 cards max per chain on both molex and sata even if I have to use those cheap converters.
With 3 cards on a chain mining something power hungry I noticed the chain heated up quite a bit with unpowered cards.

[scryptr]

POWERED USB RISERS--

Powered USB risers cost about the same as the cheap and dangerous flat-cable risers picured a few posts back.  They power each card with a 4-pin MOLLEX or SATA adapter, not to the PCIe port, but to the goldfingers of the card, just like the motherboard slots.

They are more safe, and the USB cable is more flexible.      --scryptr

P.S.  SP_ release dot 70 mines Neoscrypt at 340kh/s on my GTX 960, rather than 330-335kh/s with release dot 69. However, a very brief attempt at solo-mining failed.  I'll try again later.       --scryptr

curious......on the usb side, what would be the results of me adding one of those hubs and tring to run 8 GPUs off pcie ?

PCIe DAUGHTER HUB/SPLITTER--

I've been asked this before, if we are talking about the same thing.  I purchased a 1 PCIe-to-4 PCIe board, it worked for GTX 500 series and below.  I could not get it to work with GTX 700 series nor any AMD cards.  There is a picture of one of the boards several pages back.  However, a simple USB hub would not work, the circutry could not handle the information from multiple cards on one line.       --scryptr

I found one that is powered 1 to 4 splitter and I think I posted it in the cuda thread.  djm and I talked about it and found the technology would be a pain to work out or maybe it was to expensive at the time for a simple 750ti rig.  Maybe for the higher end cards it will be worth it. I'll see if I can find it.

PCIe SLOT SPLITTER--

They go for $35-40 now.  It is powered, and the graphic cards must be also by a powered USB riser and possibly a PCIe power line depending on the graphic card model..  There are models of this splitter card that sell for more than the price of a motherboard, too.  Good luck!       --scryptr

[flipclip]

PCIe SLOT SPLITTER--

They go for $35-40 now.  It is powered, and the graphic cards must be also by a powered USB riser and possibly a PCIe power line depending on the graphic card model..  There are models of this splitter card that sell for more than the price of a motherboard, too.  Good luck!       --scryptr

Something like: http://amfeltec.com/products/flexible-x4-pci-express-4-way-splitter/

[scryptr]

PCIe SLOT SPLITTER--

They go for $35-40 now.  It is powered, and the graphic cards must be also by a powered USB riser and possibly a PCIe power line depending on the graphic card model..  There are models of this splitter card that sell for more than the price of a motherboard, too.  Good luck!       --scryptr

Something like: http://amfeltec.com/products/flexible-x4-pci-express-4-way-splitter/

YES--

The model(s) that you link are priced per quote only.  I am sure that you could get a refund if they didn't work.  Get the cheap ones off of Amazon, you can get a refund that way.       --scryptr

[hack_]

PCIe SLOT SPLITTER--

They go for $35-40 now.  It is powered, and the graphic cards must be also by a powered USB riser and possibly a PCIe power line depending on the graphic card model..  There are models of this splitter card that sell for more than the price of a motherboard, too.  Good luck!       --scryptr

Something like: http://amfeltec.com/products/flexible-x4-pci-express-4-way-splitter/

YES--

The model(s) that you link are priced per quote only.  I am sure that you could get a refund if they didn't work.  Get the cheap ones off of Amazon, you can get a refund that way.       --scryptr

I've tried searching for some, but can't main one down, maybe i'm using rong key words, if you have a link , i'd be grateful.

Now this brings forward an interesting topic, a while back when we could still really mine BTC with GPUs , windows 7 had a 4 GPU limit, is there a way around this? Has anyone managed to get more than 8 GPUs working reliably on any system at all? Linux or windows?

[Strannik-74]

Has anyone managed to get more than 8 GPUs working reliably on any system at all? Linux or windows?

yes, 10GPU on Windows abd 18GPU on Linux

[hack_]

Has anyone managed to get more than 8 GPUs working reliably on any system at all? Linux or windows?

yes, 10GPU on Windows abd 18GPU on Linux

Any guides?

[Strannik-74]

Any guides?

18GPU  10GPU

[dominuspro]

PCIe SLOT SPLITTER--

They go for $35-40 now.  It is powered, and the graphic cards must be also by a powered USB riser and possibly a PCIe power line depending on the graphic card model..  There are models of this splitter card that sell for more than the price of a motherboard, too.  Good luck!       --scryptr

Something like: http://amfeltec.com/products/flexible-x4-pci-express-4-way-splitter/

YES--

The model(s) that you link are priced per quote only.  I am sure that you could get a refund if they didn't work.  Get the cheap ones off of Amazon, you can get a refund that way.       --scryptr

I've tried searching for some, but can't main one down, maybe i'm using rong key words, if you have a link , i'd be grateful.

Now this brings forward an interesting topic, a while back when we could still really mine BTC with GPUs , windows 7 had a 4 GPU limit, is there a way around this? Has anyone managed to get more than 8 GPUs working reliably on any system at all? Linux or windows?

I have this one for ~40$: http://www.sintech.cn/riser%20card/ST-PCIE4PCIE%20PCI-E%20X1%20to%204%20PCIe%20x1%20riser%20cable.html
and I cannot make it work with maxwell cards. Tried 750ti, 960 and 970. No luck. In windows it gets detected... all pcie ports shows in the device manager but not the gpus. Tried also in linux on 2 different mobo but no luck. I got a refund.

Another thing i tried is to connect 3 gpus(maxwell) to an asrock q1900 mobo. It can work only with 2 gpus. No matter about slot number or gpu combination... Only 2 works at the same time in Win or linux enviroment.

Then I purchased an asrock h81 pro btc and it is great. Not only for mining. I got a 2nd hand unused for 35EUR +celereon for 30EUR...

btw I would never use an oldschool ribbon riser... I just love all the advantages usb riser offers.

I hope sp won't be angry for the offtopic

[rednoW]

-Stop mining on disconnect's to save power.(pallas / flipclip)

Just tried this new feature. Works like a charm! Stops using gpu and continues to work after connection is available again ))

Will send some beers to pallas / flipclip later ))

[sp_]

gtx 750 1gb 1500/1600, win7x64, forceware 353.30
neoscrypt 199kh/s (-i 14.5, gpu mem usage 807mb, mem controller load 33-37%, without -i the same )
quark 6300kh/s (-i 22.9)
lyra2v2 4440kh/s (-i 19 slightly better then default)

Strong numbers for the junior desktop Maxwell. lyra2v2 doesn't scale as good on the other compute 5.2 cards compared to quark and x11. I think is is possible to optimize here, but the kernal will use more power.

But djm34 is the expert on the memory algos, hopefully he will release is private miner some time in the future. (lyra2v2 15-16MHASH on the gtx980)

[sp_]

GIGABYTE GeForce GTX 970 [GV-N970WF3OC-4GD 1.0]  
GPU 1264MHz (+150)/ mem 1753MHz (lock) / VDDC 1.2V (lock)
Rig idle 70W
     -- ccminer-1.5.69-git-spmod --
Lyra2REv2 - 9.5MH/s - 155W (Rig 225W)
X11-           8.7MH/s - 175W (Rig 245W)
Quark-        18MH/S - 220W (Rig 290W)

Thanks for testing the watt usage.

The GV-N970WF3OC is a great card, but it use too much power to mine.. A low profile card with 2 6pins connectors is only using 150-180W mining quark. But the hashrate is not 18MHASH, more like 15,5.


So the last 2,5 MHASH is with a cost of 40WATT.

[bathrobehero]

GIGABYTE GeForce GTX 970 [GV-N970WF3OC-4GD 1.0]  
GPU 1264MHz (+150)/ mem 1753MHz (lock) / VDDC 1.2V (lock)
Rig idle 70W
     -- ccminer-1.5.69-git-spmod --
Lyra2REv2 - 9.5MH/s - 155W (Rig 225W)
X11-           8.7MH/s - 175W (Rig 245W)
Quark-        18MH/S - 220W (Rig 290W)

Thanks for testing the watt usage.

The GV-N970WF3OC is a great card, but it use too much power to mine.. A low profile card with 2 6pins connectors is only using 150-180W mining quark. But the hashrate is not 18MHASH, more like 15,5.


So the last 2,5 MHASH is with a cost of 40WATT.

Yes but you can get the same efficiency from the bigger OC cards as well if you limit them (old pic):

But the OC cards have the benefit to push more hash when the profitability is high enough for you not to care about a small loss in hash/watt.

[myagui]

@bathrobehero:
Have you ever tried undervolting the 970? On my 980's I run with lowered voltage, and that allows me the same (high) clocks with reduced power usage and lower temperatures. My power meter broke, so I haven't measured yet the different efficiency levels, but generally speaking, I think that you'll gain the most by tweaking voltage.

[bathrobehero]

@bathrobehero:
Have you ever tried undervolting the 970? On my 980's I run with lowered voltage, and that allows me the same (high) clocks with reduced power usage and lower temperatures. My power meter broke, so I haven't measured yet the different efficiency levels, but generally speaking, I think that you'll gain the most by tweaking voltage.

I haven't as I'm afraid that each card would be wildly different in terms of how much voltage they require not to crash (long term) on stock speeds because they also have somewhat wide ranges of stable overclocks.
If anything I was considering a slight increase in voltage for the 970s as in my case going for maximum hashrate regardless of efficiency is more profitable and the cooling on them is also pretty good.
But I might play around with lowering it in the future just to see.

[myagui]

Cool. Even if you could just run through one card, it would be interesting information to have, adding to your efficiency tables 

[Strannik-74]

GIGABYTE GeForce GTX 970 [GV-N970WF3OC-4GD 1.0]  
GPU 1264MHz (+150)/ Samsung mem 1753MHz (lock) / VDDC 1.2V (lock)
Rig idle 70W
     -- ccminer-1.5.69-git-spmod --
Lyra2REv2 - 9.5MH/s - 155W (Rig 225W)
X11-           8.7MH/s - 175W (Rig 245W)
Quark-        18MH/S - 220W (Rig 290W)
-----------------------------------------------------------------------------------------------
GIGABYTE GeForce GTX 970 [GV-N970IXOC-4GD]  
GPU 1264MHz (+179)/ Hynix mem 1753MHz (lock) / VDDC 1.2V (lock)
Rig idle 70W
     -- ccminer-1.5.69-git-spmod --
Lyra2REv2 -  8.7MH/s - 150W (Rig 220W)
X11-            7.7MH/s - 160W (Rig 230W)
Quark-        15.5MH/S - 180W (Rig 250W)