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GTX 750 Ti mining - Page 40

post #391 of 1291
Quote:
Originally Posted by zeljo024 View Post

I hawe 6 risers like this http://www.amazon.com/Converter-Extender-Flexible-Extension-Connector/dp/B00HB1T54S and this power supply http://www.corsair.com/en/builder-series-cx500 it has only 4 molex connectors

and I dont know how to all 6 cards and the motherboard (ASROCK H61 PRO BTC needs 2 molex) connect to power supply?

There were sata to 4 pin molex connectors with those usb 3.0 risers
post #392 of 1291
Quote:
Originally Posted by Decagrog View Post

First post here but I'm following that thread from the beginning,
First post here but I'm following that thread from the beginning...
Just want share my experience with the asrock 970 extreme 4: for me there was no way to run 5 750ti at a decent hashrate.
The issues seems the 1x slots (I'm on usb riser), if I plug 3 cards (2 directly on 16x slot and one 16x to 1x riser) they work fine.
On the cudaminer thread I've posted some tests and screenshots

wow really? I'm running four of the 970 extreme 4 in my 280x farm..... Not had an issue running 5 gpus on any of them.

I see your using windows also, I know some people mine on windows with no issue but have you tried Linux?

In your post you show high cpu usage, that wouldn't have anything to do with the motherboard I'd think but maybe more windows being a resource hog ?

I also see you were considering going with the 990FXA-UD3 to replace it, I highly advise against this as I just received four of them that were all somehow defective.
Edited by HardwareDecoder - 3/10/14 at 4:44am
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post #393 of 1291
Quote:
Originally Posted by Decagrog View Post

First post here but I'm following that thread from the beginning,
First post here but I'm following that thread from the beginning...
Just want share my experience with the asrock 970 extreme 4: for me there was no way to run 5 750ti at a decent hashrate.
The issues seems the 1x slots (I'm on usb riser), if I plug 3 cards (2 directly on 16x slot and one 16x to 1x riser) they work fine.
On the cudaminer thread I've posted some tests and screenshots

I've had absolutley no problem with cgminer and 4 HD7950 (2 on board and 2 on riser),
Quote:
Originally Posted by HardwareDecoder View Post

wow really? I'm running four of the 970 extreme 4 in my 280x farm..... Not had an issue running 5 gpus on any of them.

I see your using windows also, I know some people mine on windows with no issue but have you tried Linux?

In your post you show high cpu usage, that wouldn't have anything to do with the motherboard I'd think but maybe more windows being a resource hog ?

I also see you were considering going with the 990FXA-UD3 to replace it, I highly advise against this as I just received four of them that were all somehow defective.

Yes, I've had absolutley no problem with cgminer and 4 HD7950 (2 on board and 2 on riser) on windows 8 64bit
For me that issues are only on cudaminer and the 750ti...tried all windows SO (8,8.1, 7 32bit, 7 64bit) but not on linux. I spent about 2 days pulling my air without resolving much, I'll probably switch to intel since some of you have used the nicely the asrock H81
Edited by Decagrog - 3/10/14 at 5:00am
post #394 of 1291
yes that's what I have coming to replace the UD3's, Asrock h81 BTC and Celeron G3220's. Maybe AMD+Nvidia just don't like each other
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post #395 of 1291
Quote:
Originally Posted by Decagrog View Post

Quote:
Originally Posted by HardwareDecoder View Post

yes that's what I have coming to replace the UD3's, Asrock h81 BTC and Celeron G3220's. Maybe AMD+Nvidia just don't like each other


I thought the same, probably some issues related to the driver and the IRQ lines...
post #396 of 1291
Quote:
Originally Posted by Decagrog View Post

First post here but I'm following that thread from the beginning,
First post here but I'm following that thread from the beginning...
Just want share my experience with the asrock 970 extreme 4: for me there was no way to run 5 750ti at a decent hashrate.
The issues seems the 1x slots (I'm on usb riser), if I plug 3 cards (2 directly on 16x slot and one 16x to 1x riser) they work fine.
On the cudaminer thread I've posted some tests and screenshots

I can confirm I was having issues with cards #4 & #5, and swapping the USB type riser for a ribbon type in the 1x slots (which is where cards #4 & #5 are physically installed at) solved the problem. I reloaded drivers, banged my head against the wall, etc. and then took a look at the rigs that were working without issue and realized, the only difference was the type of riser. I doubt there are that many 'defective' motherboards causing the issue, since I have 5 of 5 working now at full hash with 6 750ti cards each.

Even if the riser work fine with another setup, try swapping one out with a ribbon style 1x to 16x riser and see if it doesn't clear up your issue as well. Simple fix for me once I deduced it, and it was a repeatable fix to two of the rigs that were giving me problems.

Those same USB risers that cause me issues in the 1x slots work fine in any of the other slots, by the way. Cause vs. effect? I don't know what is to blame, nor do I care at this point, since the fix is simple. thumb.gif
post #397 of 1291
Quote:
Originally Posted by Decagrog View Post

Quote:
Originally Posted by 79cj7jeep View Post

I can confirm I was having issues with cards #4 & #5, and swapping the USB type riser for a ribbon type in the 1x slots (which is where cards #4 & #5 are physically installed at) solved the problem. I reloaded drivers, banged my head against the wall, etc. and then took a look at the rigs that were working without issue and realized, the only difference was the type of riser. I doubt there are that many 'defective' motherboards causing the issue, since I have 5 of 5 working now at full hash with 6 750ti cards each.

Even if the riser work fine with another setup, try swapping one out with a ribbon style 1x to 16x riser and see if it doesn't clear up your issue as well. Simple fix for me once I deduced it, and it was a repeatable fix to two of the rigs that were giving me problems.

Those same USB risers that cause me issues in the 1x slots work fine in any of the other slots, by the way. Cause vs. effect? I don't know what is to blame, nor do I care at this point, since the fix is simple. thumb.gif

the fix is sub optimal though as ribbons are generally garbage and it is better to just return defective motherboards (UD3) and get something that works correctly.
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post #398 of 1291
Quote:
Originally Posted by HardwareDecoder View Post


the fix is sub optimal though as ribbons are generally garbage and it is better to just return defective motherboards (UD3) and get something that works correctly.

Makes sense. Only in my case, I have 5 UD3 motherboards, and none are defective, since they work correctly with the proper riser. No sure what makes the ribbon extension 'garbage' either, but well, to each their own. To be honest, I don't care about anyone else's success, since this isn't a team effort, I'm simply sharing with anyone who's interested, that the combination certainly does work.
post #399 of 1291
Quote:
Originally Posted by 79cj7jeep View Post

Makes sense. Only in my case, I have 5 UD3 motherboards, and none are defective, since they work correctly with the proper riser. No sure what makes the ribbon extension 'garbage' either, but well, to each their own. To be honest, I don't care about anyone else's success, since this isn't a team effort, I'm simply sharing with anyone who's interested, that the combination certainly does work.

I don't think that word means what you think it means. Anyway I can tell I'm irritating you by disagreeing that you have actually fixed anything. I will stop replying to you. I'm not trying to troll or start a fight. I just disagree completely and you can keep your defective motherboards I'll buy something that works. With 71 GPU's in the house I don't have time for failure.
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post #400 of 1291
Quote:
Originally Posted by HardwareDecoder View Post

I don't think that word means what you think it means. Anyway I can tell I'm irritating you by disagreeing that you have actually fixed anything. I will stop replying to you. I'm not trying to troll or start a fight. I just disagree completely and you can keep your defective motherboards I'll buy something that works. With 71 GPU's in the house I don't have time for failure.

Agreed, I'm not looking for a fight either, just wanted to help someone out if they come across this thread with a UD3 motherboard and the chance that a 5 minute swap might save them the hassle of having to return hardware, nothing more.

As you claim I might not understand what 'proper' means, I'd have to say I don't think that word above means what you think it means. Just because two or more pieces of hardware are possibly incompatible does not necessarily make one or the other defacto defective. That's all I was getting at here, you are proving nothing 'defective' by replacing the motherboard with a different one. So what, maybe it works fine with the next motherboard you buy, just as it works fine with the other riser I am using. Did either of us 'fix' something by changing out a single piece of hardware and producing an outcome where it appears the problem no longer exists? I continue to fail to see the superiority of your logic over mine, which again is fine, hopefully the problem goes away for you when you get the new mobo's. If not, try swapping out the risers with ribbon type tongue.gif
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