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GTX 750 Ti mining - Page 57

post #561 of 1291
Quote:
Originally Posted by RavenXBR View Post

I've tried several combinations and found that the best one for me is: -l T5x11 -b 4096 -i 1 -a scrypt-jane:UTC
-l T5x11: is what autotune always find. Tried some others but with worst results.
-b 4096: less is worst and higher brings no gain.
-i 1: slightly better than -i 0.
-H: its not suggested to use CPU on "jane", and -H 2 is default. Tried -H 1 and its worst. Just omit it.
-m: no difference using 0 or 1. Tried both and no gain. Just omit it.
-C: useless when choosing "T" kernel. Just omit it.

With this set, and cuda 32 bits, I'm achieving 63~64KHs with a Gigabyte OC +135/+650 (With scrypt I got 300KHs).
With cuda x64 its around 62KHs.

I'm will leave it mining all the night with this setup and in the morning will check if is stable and "profitable".

Thanks for the info, man! Right now I am still mining scrypt but will want to transition gradually to this.
post #562 of 1291
Is a 500w PSU (like Corsair CX500M) gonna be enough for six of these cards (with minor OC, no bios edit), on a normal system (Asrock H81 BTC and G1820) ?
Edited by HACO - 3/16/14 at 1:18pm
post #563 of 1291
Quote:
Originally Posted by HACO View Post

Is a 500w PSU (like Corsair CX500M) gonna be enough for six of these cards (with minor OC, no bios edit), on a normal system (Asrock H81 BTC and G1820) ?

Running scrypt I think you're going to be over 100% on a CX500 (rated 38 amps on the 12v rail, 456 watts). Right now I am running five EVGA cards on a CX600 and the whole system draws 500 watts running scrypt-jane and about 550-575 watts on scrypt.. So 575*0.80= about 460 watts in the system. Yours will be more efficient with that CPU and lower clocks but not enough to make up the difference.

A
post #564 of 1291
Quote:
Originally Posted by SR20DEN View Post

Running scrypt I think you're going to be over 100% on a CX500 (rated 38 amps on the 12v rail, 456 watts). Right now I am running five EVGA cards on a CX600 and the whole system draws 500 watts running scrypt-jane and about 550-575 watts on scrypt.. So 575*0.80= about 460 watts in the system. Yours will be more efficient with that CPU and lower clocks but not enough to make up the difference.

A

So it's safer to go with a CX600, right?
post #565 of 1291
Quote:
Originally Posted by RavenXBR View Post

What average rate do you get in this case?

As stated in my post. 67kh per card on the EVGA and about 33kh with the Gigabyte.

I have tried the settings you listed, thank you for that, but any time I use the -b switch on my Gigabyte cards they run incredibly slow. I am obviously missing something but I have been spending all my time making six 290Xs work on one system (severe PITA).

Those EVGA cards that half the people in this thread said not to by are by far my most reliable miners. At this point i'd be happy to sell my Gigabyte cards and replace them with EVGA.
post #566 of 1291
Quote:
Originally Posted by HACO View Post

So it's safer to go with a CX600, right?

It should run just fine but if you're going to buy something anyway I'd go just a little bit higher. Perhaps a CX750 or equivalent. And if you're the one paying for the power you might even want to get a Gold or Platinum certified PSU.

http://pcpartpicker.com/parts/power-supply/#m=11&sort=a9
post #567 of 1291
Quote:
Originally Posted by HACO View Post

So it's safer to go with a CX600, right?

Yep, I saw 470watts at the wall with 5 cards and about 540 watts with 6. 600 watts is good if you don't plan on flashing the bios, which in my opinion isn't worth it unless you get free or extremely cheap electric.
post #568 of 1291
Quote:
Originally Posted by SR20DEN View Post

It should run just fine but if you're going to buy something anyway I'd go just a little bit higher. Perhaps a CX750 or equivalent. And if you're the one paying for the power you might even want to get a Gold or Platinum certified PSU.

http://pcpartpicker.com/parts/power-supply/#m=11&sort=a9

Great point, yeah, I'll get a gold PSU in the region of 600 watts.
post #569 of 1291
Quote:
Originally Posted by HACO View Post

So it's safer to go with a CX600, right?

The RM650 looks like a good choice.
Its 90% efficient and had some good reviews, BUT, there's a whole thread here saying that its crap.
Now I'm "lost".

Quote:
Originally Posted by SR20DEN View Post

As stated in my post. 67kh per card on the EVGA and about 33kh with the Gigabyte.

I have tried the settings you listed, thank you for that, but any time I use the -b switch on my Gigabyte cards they run incredibly slow. I am obviously missing something but I have been spending all my time making six 290Xs work on one system (severe PITA).

Those EVGA cards that half the people in this thread said not to by are by far my most reliable miners. At this point i'd be happy to sell my Gigabyte cards and replace them with EVGA.

Sorry, didn't notice the value in the post.
So we are achieving similar rates (around 65K).

My Gigabyte GV-N75TOC-2GI is doing pretty well so far.

I tested the "-b" parameter because there's an example with it inside the cudaminer README.TXT.
It worked for me.
Edited by RavenXBR - 3/16/14 at 3:32pm
post #570 of 1291
Apparently 2gb of ram is enough---didn't know that!

If you set virtual memory to 8192mb you can use high thread concurrency on amd rigs...not sure if it helps nvidia but it probably does too.
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