NVIDIA cards will trottle and downlock if you don't have enough power. (If the power exceeds the TDP)
6 non powered 750 ti's on a single motherboard is not a problem as long as the motherboard is equipped with extra power. Like the h61 and h81 asrock BTC boards. Default tdp of the oldest non powered 750ti cards is 38w (in the bios) This can easily be checked with the NVIDIA inspector tool.
the power doesnt need to be ALL motherboard provided ... ALL of the non-powered gigabyte 750ti oc cards run from the 1x pcie usb 3.0 powered risers ( 6 of them on a motherboard ) ... they are powered not only by the single pin on the 1x pcie connector from the motherboard - but also the power connector on the riser itself ... so they don't require any more power ( or draw any more power ) from the motherboard itself ... the risers are getting their extra power directly from the psu using sata power connectors on a separate rail ... i have this type of setup running on both the asrock h81 motherboard ( without the two extra 4pin molex connectors supplying the motherboard ) as well as 5 x pcie gigabyte motherboards ( that have NO extra motherboard connectors ) ... and they ALL run really well - with throttling only happening when they overheat ... and im fixing that issue also ... #crysx But I use the same setup with non power risers and with the two extra 4pin molex connectors connected to the mother board. Been running stable since mar-2014 (H61 BTC) windows 7. Some of my rigs have older drivers, and it seems to help in the lyra2v2 and quark algos. +100-200KHASH per 750ti card. |
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Optimized miner for sale 0.1 BTC (With full sourcecode linux compatible)
NVIDIA Maxwell cards only (gtx 750, 750ti, 950,960,970,980,980ti)
Spreadminer sp-mod 9: 10-20% faster.
My modded miner can do 5MHASH with overclocking on the gtx 970.
I am working on version 10 for the buyers with a higher hashrate.
Pm for details.
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NVIDIA cards will trottle and downlock if you don't have enough power. (If the power exceeds the TDP)
6 non powered 750 ti's on a single motherboard is not a problem as long as the motherboard is equipped with extra power. Like the h61 and h81 asrock BTC boards. Default tdp of the oldest non powered 750ti cards is 38w (in the bios) This can easily be checked with the NVIDIA inspector tool.
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Sorry for dumb question - "GPU-Z - PerfCap Reason - VOp" is normal? (GTX750TIOC2GD5)
You should add a little overclocking for optimal performance. |
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I can see it in the link. I don't have a compute 3.5 card. Maybe there are some possible speedups to be made on the 780ti. Anyone with a 780ti card who can compile the latest version (add compute 3.5 in the projectfile (or makefile) What hashrates are you getting? EVGA 780ti SC +100 GPU OC Quark: 11.7 MH/s X11: 6.35 MH/s Lyra2v2: 7.7 MH/s Neo: 330 KH/s (375 with r58) I think djm34's original lyra2v2 does around 9 in lyra2v2? must be about that. However it is (I think) related to the 64bit instruction which is a lot faster on the 780ti for some reasons... I think it's because the compute 3.5 kernal has a memshift variable that allign all reads to 4x32bit boundary. Since the vector instructions needs the memory to be alligned. Or it could be the level1 cache wich works on memory banks just like shared mem. If two threads are reading from the same memory block you get a stall. Djm's compute 3.5 core is using 25% more memory in the random access matrix and is not faster on the maxwell. |
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I can see it in the link. I don't have a compute 3.5 card. Maybe there are some possible speedups to be made on the 780ti. Anyone with a 780ti card who can compile the latest version (add compute 3.5 in the projectfile (or makefile) What hashrates are you getting? EVGA 780ti SC +100 GPU OC Quark: 11.7 MH/s X11: 6.35 MH/s Lyra2v2: 7.7 MH/s Neo: 330 KH/s (375 with r58) I think djm34's original lyra2v2 does around 9 in lyra2v2? Gigabyte 980ti OC g1 +100mhz (release 74) quark: 28.5MHASH x11: 13.5MHASH lyra2v2: 18MHASH Neo: 650KH/s |
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I can see it in the link. I don't have a compute 3.5 card. Maybe there are some possible speedups to be made on the 780ti. I did most of the work on ethminer on a 780. It's mostly the same as Maxwell, but on SASS level (or PTX if you use Cuda 7.5) the biggest difference is in the absence of LOP3.LUT. Another big difference is that for kernels with low reg counts, you can do double the amount of blocks per SM on Maxwell (32 vs 16). And more shared mem per SM. Would you be so kind and test the speed of the different algos in my fork? |
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1.5.66(sp-MOD) - Lyra2v2 - GTX750Ti - 1431/1440 - 5177kh/s
1.5.69(sp-MOD) - Lyra2v2 - GTX750Ti - 1431/1440 - 5160kh/s
1.5.73(sp-MOD) - Lyra2v2 - GTX750Ti - 1431/1440 - 5100kh/s
1.5.74(sp-MOD) - Lyra2v2 - GTX750Ti - 1431/1440 - 5145kh/s
1.5.66(sp-MOD) - Quark - GTX750Ti - 1431/1440 - 7195kh/s
1.5.69(sp-MOD) - Quark - GTX750Ti - 1431/1440 - 7251kh/s
1.5.73(sp-MOD) - Quark - GTX750Ti - 1431/1440 - 7238kh/s
1.5.74(sp-MOD) - Quark - GTX750Ti - 1431/1440 - 7190kh/s
Thanks for testing. Something happed between release 66 and 69. Looks like 66 is the fastest. but the clocks are higher. lyra2v2: release 66: 9805 gtx 970 (core 1354Mhz, mem 1502MHz) release 69: 9282 gtx 970 (core 1328.5Mhz, mem 1502MHz) release 73: 9204 gtx 970 (core 1328.5Mhz, mem 1502MHz) release 74: 9550 gtx 970 (core 1316.3Mhz, mem 1502MHz) I have tested some more. Release 74 is using more power and heat, so the card trottle and performance is lost. My test was conducted in a closed case rig with a EVGA superclocked card (2x 6pins power) but my dev card: The gigabyte 970oc G1 comes with 1x8 pin and 1x6 pin and doesn't trottle and give bether performance in release 74 than 66. |
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I can see it in the link. I don't have a compute 3.5 card. Maybe there are some possible speedups to be made on the 780ti. Anyone with a 780ti card who can compile the latest version (add compute 3.5 in the projectfile (or makefile) What hashrates are you getting? |
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Doesn't help with a 1.5x faster hardware when the software is 2x slower.. So you will need someone to create a good compiler, and someone to mod the code..
The 980ti is around 3x faster than the 780ti mining quark.
The 980ti is around 2x faster than the 780ti mining x11.
The 980ti is around 1.5x faster than the 780ti mining lyra2v2.
That is interesting considering the 780ti and 980ti look very similar hardware specs wise other than a bit more memory(3GB) and a tiny amount of cuda cores(16more) on the 980ti Why the big difference? The 780ti only have 64 registers while the maxwell have 256. With 64 registers, the 780ti spills to the stack. But in the memory algos like Lyra2v2 the performance is bether. Mostly because djm34 have made seperate kernals for compute 3.5 and 5.0. In my maxwell mod I removed the optimized compute 3.5 kernals, because they used 25% more memory. The maxwell is caching only 32bit in a cacheline while the kepler cache 128 bits. |
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Doesn't help with a 1.5x faster hardware when the software is 2x slower.. So you will need someone to create a good compiler, and someone to mod the code..
The 980ti is around 3x faster than the 780ti mining quark.
The 980ti is around 2x faster than the 780ti mining x11.
The 980ti is around 1.5x faster than the 780ti mining lyra2v2.
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1.5.66(sp-MOD) - Lyra2v2 - GTX750Ti - 1431/1440 - 5177kh/s
1.5.69(sp-MOD) - Lyra2v2 - GTX750Ti - 1431/1440 - 5160kh/s
1.5.73(sp-MOD) - Lyra2v2 - GTX750Ti - 1431/1440 - 5100kh/s
1.5.74(sp-MOD) - Lyra2v2 - GTX750Ti - 1431/1440 - 5145kh/s
1.5.66(sp-MOD) - Quark - GTX750Ti - 1431/1440 - 7195kh/s
1.5.69(sp-MOD) - Quark - GTX750Ti - 1431/1440 - 7251kh/s
1.5.73(sp-MOD) - Quark - GTX750Ti - 1431/1440 - 7238kh/s
1.5.74(sp-MOD) - Quark - GTX750Ti - 1431/1440 - 7190kh/s
Thanks for testing. Something happed between release 66 and 69. Looks like 66 is the fastest. but the clocks are higher. lyra2v2: release 66: 9805 gtx 970 (core 1354Mhz, mem 1502MHz) release 69: 9282 gtx 970 (core 1328.5Mhz, mem 1502MHz) release 73: 9204 gtx 970 (core 1328.5Mhz, mem 1502MHz) release 74: 9550 gtx 970 (core 1316.3Mhz, mem 1502MHz) |
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Hi SP. thanks for build. can confirm speed up on 750Ti 30-40 kh/s small donation in dash: Transaction ID: 39d1110129585ae0646c35c900e471de9627ee51f3041c79518757e784305ba8-000 Do you have any plans about working on X11 algo? Thanks.  Yes. x11 is getting more profitable now. I have found some improvents in the simd algo. Will take a look later when I have time. |
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Thanks alot I am building release 74 now with a boost in lyra2v2 |
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yeah. One of my favorite songs |
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yeah. The Neoscrypt kernal is pretty good.
Looks like the latest changes in the lyra2v2 is hurting the 980/980ti performance.. Since I have added a memory access (level1 cache) I think the tpb(threads per block) needs to be retuned.
search for these lines in the code (lyra2rev2.cu)
and change tpb
1,2,3,4,5,6,7.... 256?
else if (strstr(props.name, "980"))
{
intensity = 256 * 256 * 18;
tpb = 8;
}
and...
else if (strstr(props.name, "980 Ti"))
{
intensity = 256 * 256 * 18;
tpb = 8;
}
NEOSCRYPT-- Neoscrypt will not solo-mine. None of the wallets (phoenixcoin, feathercoin, UFOcoin, etc) communicate properly with the miner. I keep getting "Invalid JSON data", and "Unable to start getwork" errors with tpruvot's ccminer, and no error information with your ccminer. These are really low diff coins, with small network hash rates. --scryptr Like a hacked drone flying across america painted black. https://www.youtube.com/watch?v=Z-7TRVsArgI1:100 000 000 |
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yeah. The Neoscrypt kernal is pretty good.
Looks like the latest changes in the lyra2v2 is hurting the 980/980ti performance.. Since I have added a memory access (level1 cache) I think the tpb(threads per block) needs to be retuned.
search for these lines in the code (lyra2rev2.cu)
and change tpb
1,2,3,4,5,6,7.... 256?
else if (strstr(props.name, "980"))
{
intensity = 256 * 256 * 18;
tpb = 8;
}
and...
else if (strstr(props.name, "980 Ti"))
{
intensity = 256 * 256 * 18;
tpb = 8;
}
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sending you 173 vert
Got it now. Thanks |
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Less beers? Not necessarily less grateful, probably just a lot less, miners.
Hard times for the public kernals.. So I am adding a few percent. cheers |
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