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GTX 750 Ti mining - Page 61

post #601 of 1291
Quote:
Originally Posted by Partol View Post

Let me know how the extra TIM works for you.
Which TIM are you using?

I used Kepler Bios Tweaker to undervolt and increase TDP by only one notch to 39500.
Currently, my Asus card (with bios mod) is running at 1254MHz, 1.05V, 3100 mem, 75% fan speed, 68C gpu, ~305khash/s with -H 1
next I will focus on lower gpu temperature in order to OC higher.

My stock dual-fan MSI 750 Ti (with stock bios) is running at 1268MHz, 1.056V, 3100 mem, 70% fan speed, 49C core, ~305khash/s with -H 1

Will do so tomorrow at fellow PC workshop, need to use plyers to get the screw with warranty sticker out as they're picky towards the things like that @ my country mad.gif

Isn't that -H 1 flag meant to engage CPU in mining? Curious if I should use it in my 5 card setup. Would you be kind to share the Tweaker settings? I am going to try all the tuning combos available before putting the bad boy to headless mining.

UPD:
Got to clean that nasty tape off the aluminum and it's getting off really hard. What compound suits best for that? I'm planning to use thermal pads on mem chips, to see if that would be a good solution.

Partol, may I ask you to share the BIOS you have as running stable over 24Hrs with any decent hashrate has been practically impossible.
Edited by roadhero - 3/18/14 at 5:14am
post #602 of 1291
Quote:
Originally Posted by dph314 View Post

Hey guys. Just had a question about these- USB 3.0 PCI riser

Reviews said people were getting the same hashrate, but I just hooked two of these up for my 750's and it brought them down from over 300khash/s to 260. Am I missing something? Same clocks, software, everything. I know USB has a much lower bandwidth, but it can't even handle 750's? Plus the only reason I gave them a try is because I saw people with much more powerful cards saying they were getting the same hashrate as without them.

They have absolutely nothing to do with USB3 besides the fact they use the USB cable to carry the pci-e signals. The limit is because you are using only x1 PCI-e lane. Unless you plug the card into an x4, x8, or x16 slot with the appropriate width riser, it'll be limiting the bandwidth a bit.
post #603 of 1291
does windows 7 work with 6 GPUs ? and How?
post #604 of 1291
Quote:
Originally Posted by fatadxb View Post

does windows 7 work with 6 GPUs ? and How?
Yes, it should work the same as with 1-5 cards, no tricks involved.
 
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post #605 of 1291
thanks alot
post #606 of 1291
Quote:
Originally Posted by kr00t0n View Post

So I have added my new KFA2 low profile card to my Gigabyte rig.

Copied my X86 Cuda folder, adjusted the bat so it was -d 1 and my original is -d 0, and ran both bats.

My Giga card runs fine as normal, but the KFA2 is running at 15% hash, only using 15% of it's power limit, but showing 99% GPU usage in Afterburner.

Any ideas?

Use the parameter -d 0,1 to let cudaminer know you want to use both cards and use -H 2 for the miner to offload all the work to the GPU, which is enabled by default. (I have to use this to keep a consistent clock speed on my second 780).
post #607 of 1291
I'm having an issue, with cudaminer and 6 750Ti's. Basically for 5 of them I get around 290 KH/s contentiously but for one of the them, it's always around 30 KH/s. Any ideas?

I'm using this:

cudaminer -i 0 -C 1 -m 1 -l T10x24 -H 2
post #608 of 1291
Quote:
Originally Posted by HACO View Post

I'm having an issue, with cudaminer and 6 750Ti's. Basically for 5 of them I get around 290 KH/s contentiously but for one of the them, it's always around 30 KH/s. Any ideas?

I'm using this:

cudaminer -i 0 -C 1 -m 1 -l T10x24 -H 2

Your drivers for that card crashed, restart the whole rig and it should be fine.

Also get rid of the -C1 and -H 2 tags in your config line they are doing nothing at all.
post #609 of 1291
Quote:
Originally Posted by Americonfusion View Post

Your drivers for that card crashed, restart the whole rig and it should be fine.

Also get rid of the -C1 and -H 2 tags in your config line they are doing nothing at all.

Thanks! Solved the problem. Yeah I was experimenting with other values but eventually went back to default as they were the best.
post #610 of 1291
Quote:
Originally Posted by roadhero View Post

Isn't that -H 1 flag meant to engage CPU in mining? Curious if I should use it in my 5 card setup. Would you be kind to share the Tweaker settings? I am going to try all the tuning combos available before putting the bad boy to headless mining.

Try -H 1 and -H 0 and -H 2.
Use the setting which gives most hash rate.
Quote:
Originally Posted by roadhero View Post

Got to clean that nasty tape off the aluminum and it's getting off really hard. What compound suits best for that? I'm planning to use thermal pads on mem chips, to see if that would be a good solution..

I slowly pulled the tape off with my fingers. not so difficult.

Removing the TIM stuck to the heatsink was very difficult. I used the dull side of a razor (box cutter).
alcohol or water + cloth to shine the metal

At first, I used a thermal pad, but it was too thick. not enough space between memory and heatsink.
Quote:
Originally Posted by roadhero View Post

Partol, may I ask you to share the BIOS you have as running stable over 24Hrs with any decent hashrate has been practically impossible.

Most likely, your Asus cards are unstable because the memory is overheating. I use MSI Afterburner to overclock the memory.
I don't overclock memory in the bios. Only thing I did in the bios is a tiny TDP increase from 38500 to 39500 and undervolt a little (by increasing the boost table).
My bios will not help to stabilize your card.

The only way to get high hashrate with the dual fan Asus card is to mod it. If I bought 5 Asus cards, I would try to return them and get something else instead.
     
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