CCminer(SP-MOD) Modded GPU kernels.

[5w00p]

bathrobehero,

What is the advantage for mining when increasing the TDP of a 750Ti via a flashed BIOS?

I imagine that it allows a higher overclock and therefore higher hashrate. But, I have had a PNY 750Ti OC for over a year, and I never flashed it. I never saw anyone posting any hashrates for algorithms that I cared to mine that were significantly higher than what my card would do (with my particular card's stock BIOS - OC maximized). Sure, maybe a less than 5% faster hashrate than my card, but that just didn't seem worth the risk and effort.

Am I correct or mistaken?

[fenomenhaa]

@SP another donation on the way, yesterday some of my cards mined for you ,thanks for your hard work. Btc :  4d6d292c590173b279ae0b77ea0a2ab40c9369b8534aa7fe60c8c1f7af522dd5 .

Did anyone test g parameter on quark or other algos.?it helps or not. still i mine with default settings.

[sp_]

Offtopic: Just as a reminder for people with TDP modded Gigabyte 750 Ti OC (GV-N75TOC-2GI) cards; expect your cards to die. Out of 6, now 2 of them died on me in 11 months (no fan, no screen, nothing). And I 'only' increased the TDP to 45W (instead of the usual 60W) and only after 3-4 months of stock use. I usually had +140 to +170 mhz on the core with stock mem clocks. Temps were always around 60°C with the max temp target set to 65°C.

Just replace the bios with the gforce black bios. Same cooler, same power setting, more hash

[sp_]

Can the g parameter be used per device, example two cards set differently with -g 4,3 ?  (per if you are running a mix of cards)

you have to do
-d 3,4 and then -g x

Not sure it works.
[/quote]

Should work, but the stats doesn't display the results correct per card. On the pool it should be ok though

[bathrobehero]

bathrobehero,

What is the advantage for mining when increasing the TDP of a 750Ti via a flashed BIOS?

I imagine that it allows a higher overclock and therefore higher hashrate. But, I have had a PNY 750Ti OC for over a year, and I never flashed it. I never saw anyone posting any hashrates for algorithms that I cared to mine that were significantly higher than what my card would do (with my particular card's stock BIOS - OC maximized). Sure, maybe a less than 5% faster hashrate than my card, but that just didn't seem worth the risk and effort.

Am I correct or mistaken?

It's both higher overclock and more stability with overclocks. Even though I'll never get how some people can overclock their 750 Ti cards to ~1500 mhz and be stable, with increased TDP I could overclock to around 1350-1380 mhz and still have the rig running for weeks without crashing (for most algorithms that is). I always ready to jump onto new coins and solomine as much as I can until the pools join and the difficulty shoots up so I appreciate higher hashrate over hashrate/power consumption figures.

Just replace the bios with the gforce black bios. Same cooler, same power setting, more hash

Never heard of it but I don't think that is any different from a TDP mod. I just think the voltage regulation modules on these particular cards are just not equipped to handle anything over stock figures for long periods of time.

[Epsylon3]

Offtopic: Just as a reminder for people with TDP modded Gigabyte 750 Ti OC (GV-N75TOC-2GI) cards; expect your cards to die. Out of 6, now 2 of them died on me in 11 months (no fan, no screen, nothing). And I 'only' increased the TDP to 45W (instead of the usual 60W) and only after 3-4 months of stock use. I usually had +140 to +170 mhz on the core with stock mem clocks. Temps were always around 60°C with the max temp target set to 65°C.

I also had one of my black edition broken, which was just replaced (3 years warranty) and there is something interresting to report...

You can see here an exploded cap C704 on the center...

On the new one, all these caps were removed...

The problem happened after a while when i tried mining on a PCX riser (1x to 16x, i suspect the 3.3V to be unstable on that)..

[hashbrown9000]

good to know about the 750ti cards as i have 12 of those exact ones.  I wonder how they will fare in open-air mining rigs like mine.

[frazier34567]

Offtopic: Just as a reminder for people with TDP modded Gigabyte 750 Ti OC (GV-N75TOC-2GI) cards; expect your cards to die. Out of 6, now 2 of them died on me in 11 months (no fan, no screen, nothing). And I 'only' increased the TDP to 45W (instead of the usual 60W) and only after 3-4 months of stock use. I usually had +140 to +170 mhz on the core with stock mem clocks. Temps were always around 60°C with the max temp target set to 65°C.

I also had one of my black edition broken, which was just replaced (3 years warranty) and there is something interresting to report...

You can see here an exploded cap C704 on the center...

On the new one, all these caps were removed...

The problem happened after a while when i tried mining on a PCX riser (1x to 16x, i suspect the 3.3V to be unstable on that)..

Was it a Ribbon or USB cable riser?

On Topic, the 1.5.48 build on my single 750 TI card gets between 5866 to 7200 KH/s Quark using the -i 22 -g 5 usually closer to 6300.  However, I see a drop on my 6 750 ti card unit running at 36600 vs 37083 on build 1.5.47 commit 749.  I have gone back to using the 1.5.47 commit 749 for it,  with no extra parameters it is getting 37150 kh/s on screen and seems like it is getting more consistently on westhash (36.6 to 44.3MH/s).  Windows 8.1 Pro no OC or bios flash EVGA SC cards.

[bathrobehero]

Was it a Ribbon or USB cable riser?

On Topic, the 1.5.48 build on my single 750 TI card gets between 5866 to 7200 KH/s Quark using the -i 22 -g 5 usually closer to 6300.  However, I see a drop on my 6 750 ti card unit running at 36600 vs 37083 on build 1.5.47 commit 749.  I have gone back to using the 1.5.47 commit 749 for it,  with no extra parameters it is getting 37150 kh/s on screen and seems like it is getting more consistently on westhash (36.6 to 44.3MH/s).  Windows 8.1 Pro no OC or bios flash EVGA SC cards.

USB riser, open rig.

[tbearhere]

Offtopic: Just as a reminder for people with TDP modded Gigabyte 750 Ti OC (GV-N75TOC-2GI) cards; expect your cards to die. Out of 6, now 2 of them died on me in 11 months (no fan, no screen, nothing). And I 'only' increased the TDP to 45W (instead of the usual 60W) and only after 3-4 months of stock use. I usually had +140 to +170 mhz on the core with stock mem clocks. Temps were always around 60°C with the max temp target set to 65°C.

I read about others with similar issues a couple of times. An old post but this was close by:

blahij
May 11th, 2014 at 03:08
I had 6 flashed hashing @ 300kh for a month or two. Had two burn themselves out day before and then another the next day.
Temps were fine and I can see some discoloring on the back and one component looks blown-out?
Mine were Gigbyte and I used the posted BIOS on this site.

Quote from http://cryptomining-blog.com/1014-how-to-increase-the-geforce-gtx-750-ti-power-target-limit/

bathrobehero Yes these cards need external fans like a box fan or a 9mm fan on each and I don't let my cards ever go above 60c. When they reach this I put a fan on them and when it's hot in the room I set max temperature to 60c. I didn't know this and burned out 2 cards on this computer. The highest temperature for these cards should be 55c to 60c IMO. Another thing is to have the cards no closer than 15 cm  to each other in an open rig. One of those cards still works but won't let me overclock.

[tbearhere]

Offtopic: Just as a reminder for people with TDP modded Gigabyte 750 Ti OC (GV-N75TOC-2GI) cards; expect your cards to die. Out of 6, now 2 of them died on me in 11 months (no fan, no screen, nothing). And I 'only' increased the TDP to 45W (instead of the usual 60W) and only after 3-4 months of stock use. I usually had +140 to +170 mhz on the core with stock mem clocks. Temps were always around 60°C with the max temp target set to 65°C.

Just replace the bios with the gforce black bios. Same cooler, same power setting, more hash

How do you do that sp?  Thx

[tbearhere]

Offtopic: Just as a reminder for people with TDP modded Gigabyte 750 Ti OC (GV-N75TOC-2GI) cards; expect your cards to die. Out of 6, now 2 of them died on me in 11 months (no fan, no screen, nothing). And I 'only' increased the TDP to 45W (instead of the usual 60W) and only after 3-4 months of stock use. I usually had +140 to +170 mhz on the core with stock mem clocks. Temps were always around 60°C with the max temp target set to 65°C.

I also had one of my black edition broken, which was just replaced (3 years warranty) and there is something interresting to report...

You can see here an exploded cap C704 on the center...

On the new one, all these caps were removed...

The problem happened after a while when i tried mining on a PCX riser (1x to 16x, i suspect the 3.3V to be unstable on that)..

Yes Take a lazer light temp reading underneath the card and compare it to the temp your evga precision x or what ever you use and you will see a big difference in temperature. Those caps get very very hot.

[tbearhere]

good to know about the 750ti cards as i have 12 of those exact ones.  I wonder how they will fare in open-air mining rigs like mine.

Good but you must keep a box fan on them if the temp on your readout app goes above 60c... And the farther away the cards are from each other the better. I'm trying to get a 980 gtx rig and I'm going to space them 30cm apart. When ever I get my first 980 gtx.  
Ps That looks like my rig.  
Sorry sp for messing up your thread.

[tbearhere]

:loop
ccminer.exe -r 1 -R 5 -a quark   -o stratum+tcp://us-west01.miningrigrentals.com:3333 -u me -p x  -d 0,1,2
taskkill -t -f /im ccminer*
timeout -t 1
ccminer.exe -r 1 -R 5 -a quark   -o stratum+tcp://us-central01.miningrigrentals.com:3333 -u me  -p x  -d 0,1,2
goto loop

Should prevent the crash.

Thanks bathrobehero. But it was crashing at the goto loop. And said at that point it couldn't find ccminer ..

Yes, I misunderstood the problem. I couldn't replicate it though.

Either can I..but if a stratum goes down then it may happen to me.

[flipclip]

Definitly a pool problem..

I believe yaamp has fixed their issue.  I've been mining for the last couple hours with them (quark -i 22 -g 4) and haven't been seeing extranonce errors (both with a compile before commit a2cc794 and after).

[sp_]

@SP another donation on the way, yesterday some of my cards mined for you ,thanks for your hard work. Btc :  4d6d292c590173b279ae0b77ea0a2ab40c9369b8534aa7fe60c8c1f7af522dd5 .
Did anyone test g parameter on quark or other algos.?it helps or not. still i mine with default settings.

Thanks for your support.
For quark you can try -i 22 -g 5 if you have few cards.
On rigs with 6 cards it seems to run slower than with the -g parameter.

[sp_]

Just replace the bios with the gforce black bios. Same cooler, same power setting, more hash

How do you do that sp?  Thx

Extract the bios from a gforce black. Flash it on the windforce (GV-N75TOC-2G)

[tbearhere]

Just replace the bios with the gforce black bios. Same cooler, same power setting, more hash

How do you do that sp?  Thx

Extract the bios from a gforce black. Flash it on the windforce (GV-N75TOC-2G)

Thanks sp...I looked on my rig ( has 4 black editions ) and they are hashing at a higher rate then the other two GV-N75TOC-2G cards..same oc.
Ps Could you please look into what is causing us not to do round robin bat files with ccminer that keeps on crashing. We need backup pools in the bat file ect. It appears to be in ccminer itself.  
With cudaminer we can also do this a timer but need it for pool backup.

:start
cudaminer.exe -l T5x24 -o stratum+tcp://nyan.mining-pool.co.uk:3336 -u me -p x -d 0,1,2,3 --time-limit 300
goto start

  Thx

[ManiacMiner]

I noticed slight drop in performance in the new 1.5.48 version on quark. I have 3x750Ti and previous 1.5.47 gives a bit more.

[chrysophylax]

wow - so much happened and i missed it all ...

was completely swamped today - and wont be back in the office till tomorrow now ...

the open mining rig - we started like that ... only to find over time that those ribbon cables eventually died and burned SO many of our cards out ( connected to 280x at the time ) ...

now usb risers all the way - 56 of them and growing - and not one hitch - with less power issues and almost NO burnouts of cables or connectors ...

ccminer-spmod runs on all the cards now ( replaced 75% of the farm with gigabyte 750ti oc ( and lp versions ) ) and they run a little more hot than a few months ago ( which im guessing is due to the optimizations ) - but so much more smooth and a higher hashrate on stock clocks ... no oc on any of them - no need really - and way too fiddly with firmware flashing etc with all the cards in the farm ...

if quark is back on with yaamp and has no issues - would it be better to mine there? ... we find that westhash seems to have less downtime than yaamp ...

the test miner ( 2 x gigabyte 750ti oc lp ) which is still donating currently under quark to sp - is STILL rock solid with the -g 5 -i 22 parameters for quark ...

might setup the donation links on various algos on westhash with yaamp being the failover if westhash link dies altogether ( and the link has to die completely for it to failover ) ... or failover to nicehash THEN yaamp as the last failover ... what do you think guys n gals ...

will now pull the latest from git - compile and see how that runs with the same settings ...

see the progress here ... https://www.westhash.com/index.jsp?p=miners&a=12&addr=1CTiNJyoUmbdMRACtteRWXhGqtSETYd6Vd ...

sp - we will keep this miner donating to you for the time being and keep updating to test ... but we need to know which algo you would rather have running on ... if quark is it - then we can leave it where it is for the time being ...

guys n gals - all of your advice would be most helpful ...

tanx ...

#crysx