Topic: Claymore's ZCash/BTG AMD GPU Miner v12.6 (Windows/Linux) - page 204. (Read 3839201 times)

Had the same issue, its mostlikely dead, try it in another rig and if it still not working its most likely dead,
When you will try in the other rig, make sure its not on a riser, has to be on the MB slot.

on my 7970 I have 298H/s with 1100/1575, and it works without crash
but i can't improve my Sapphire 280x Tri-X OC to this results, I have only 286H/s in stable. What clocks are you used?
p.s. timings are 1250MHz

For all you unbelievables here are the results after 20 hours (look at the low rejection rate)

I also have a 7950 in another rig running at 285H/s

If you aren't getting these speeds, hack your memory straps, use 15.12 drivers, use windows 7.

The other 2 slower Tahitis are 1000mhz core clock because they are the crap Gigabyte windforce and overheat easily so I can't run them at 1100mhz, however chances are they would run at 330h/s under 1200mhz.

So the hashrate is clearly linked to engine core clock speed.

However for them to run at 1200Mhz you would need to run at stock voltage or overvolt and your power consumption would be in the Scrypt Litecoin power consumption terrority. I am talking about 300-350Watt per GPU at the wall. Not worth the extra speed boost.

Especially since the Gigabyte Windforce 7950/7970 were known to catch fire during the litecoin days.

http://i68.tinypic.com/14sjosn.png

At 1100 it uses 200 watt only because you can still undervolt them.

are you using Windows 7 perhaps? I have an 8 Card system and the only way I got them to work was with Windows 10 and Ubuntu. But it can also be the fact that your MB don't support more than 6 PCIE cards. Have you tried connecting 5 cards and one dual card? such as 7990, 295x ? I have two 7990 and 4 other cards in my 8 card system. Not using the PCI Switch.

Even at 1100 your crazy...that must be what in the 250 watt territory? I run my Tahiti's at 975 to keep them under 160 watts @ 270s/s. Don't think the extra 10-20S are worth the 50-100 watts per card. 

For all you unbelievables here are the results after 20 hours (look at the low rejection rate)

I also have a 7950 in another rig running at 285H/s

If you aren't getting these speeds, hack your memory straps, use 15.12 drivers, use windows 7.

The other 2 slower Tahitis are 1000mhz core clock because they are the crap Gigabyte windforce and overheat easily so I can't run them at 1100mhz, however chances are they would run at 330h/s under 1200mhz.

So the hashrate is clearly linked to engine core clock speed.

However for them to run at 1200Mhz you would need to run at stock voltage or overvolt and your power consumption would be in the Scrypt Litecoin power consumption terrority. I am talking about 300-350Watt per GPU at the wall. Not worth the extra speed boost.

Especially since the Gigabyte Windforce 7950/7970 were known to catch fire during the litecoin days.

Hey Guys,

I have an r7 370 that is not recognized anymore. The fans are spinning but Windows/Linux cannot see it

Since it has never happened to me before am i looking at a burnt card?

It's amazing that it's always the noobs with 20 random comments that manage to get the best results.. what a coincidence

Hey Guys,

I have an r7 370 that is not recognized anymore. The fans are spinning but Windows/Linux cannot see it

Since it has never happened to me before am i looking at a burnt card?

630 H/s in zec mining with 2 r9 280 x Claymore  11.1 bullshit - Thanksss Claymore Team Good Job

Hi,

I have a problem if I try to connect more than 6 GPUs to my AsRock H81 Pro BTC v2.0 mobo. I bought an extender riser (PCI-E x1 -> 3*PCI-E x1) and I use normal USB3 PCI-E x1->x16 risers. Everything's  fine until I connect the 7th card. I can connect the first 6 card any way I want it but after the 7th card connected I got blank screen when I turn on the rig.

How do I make it work with 7 or 8 cards?

Hey Guys,

I have an r7 370 that is not recognized anymore. The fans are spinning but Windows/Linux cannot see it

Since it has never happened to me before am i looking at a burnt card?

What is a typical h/s rate for a single 7950 card?

Because that is about all you get by what you have done.  Did you make a special bios for each card?  Or are you using a mod'd bios that is stable and works on all your cards?  If so, can you share it?  I have played with the 24 Sapphire rx 480 8g cards I have for days, and they seem to be very touchy with any change to voltages.  I have done what you did using WattTool and got the same results.  If you want to increase your hash rate without raising your power consumption by much, increase your mem clock speed from 2000 Mhz t0 2200 Mhz (some will run there, some will need to be backed down a bit, every card is different) and you should get up to around 275 H/s per card. 

Now a question for those that know how to use WattTool and are experts at undervolting.  I have lowered the last two straps on the GPU mem to match the 5th strap and I was able to lower the power consumption for a 6 card rig by 130W down to about 1100W and sustain a total production rate of 1650 H/s by raising the mem clock speed to 2150 Mhz.  What other tricks are there to lower power consumption and still remain stable?  I don't really know what the other tricks are to getting my power down using this tool.  I can lower the mem voltage by 50 mV on most of my cards but I don't see much reduction in power consumption, however I do so an increase in errors and cards dropping off in the "Open CL" hang up.  Any help would be appreciated.

I seriously doubt it. Clock rate isn't going to magically disregard the narrow memory bandwidth, and make it run 100 h/s over a 7970.