Cryptocurrency Mining

[srothman]

Yeah only have the two cards. I'll play around with the OC settings, but like I said, I've tried it defaulted, and it did the same. Will mess around with the drivers, etc. too. Thanks though

 

[techead]

Someone care to explain this?

Two identical cards, identical clocks on core and memory, same power target, alles the same. In fact, even with minus 200 on each core, the cooler card is STILL running quicker.

why is temp difference so freakin huge?

 

[techead]

Also, why the hell is the TDP on these cards so low!? I've got a power target of 70 set and with memory increased by 650 on each card I'm still only just below 60!?

These cards are running at 105 Watt at about 22.5 Mh/s ETH

 

[PhireSide]

I have found that on my 1070 and my 970 the power target value is always off by ~10% or so. My 1070 set to 65% actually shows me 70% usage in the graphs, while my 970 set to 55% shows around 65% usage.

As an aside, anyone here running a 970 for mining? What do you mainly mine - what are your biggest gains? Mine loves Equihash, but it gets relatively poor performance in DaggerHashimoto so I have that turned off for now (Windows 10)

 

[Thor]

Someone care to explain this?

Two identical cards, identical clocks on core and memory, same power target, alles the same. In fact, even with minus 200 on each core, the cooler card is STILL running quicker.

why is temp difference so freakin huge?

Picture of your cards please as they are placed currently then I will show you why.

 

[Thor]

Yeah only have the two cards. I'll play around with the OC settings, but like I said, I've tried it defaulted, and it did the same. Will mess around with the drivers, etc. too. Thanks though

Intel chipset up to date?

Also what does event viewer log when your screen goes blank and on again.

 

[Gtx Gaming]

zcash worth over 400 dollars now!

 

[etienne_marais]

Someone care to explain this?

Two identical cards, identical clocks on core and memory, same power target, alles the same. In fact, even with minus 200 on each core, the cooler card is STILL running quicker.

why is temp difference so freakin huge?

If you say same core and memory, I take that as overclocked ? As I have it each card manufactured is different due to production variation and that fixed settings serves as the base specification before overclocking, you thus have to overclock each card individually according to its optimal settings.

When you tested with -200, was that on both cards at once ?

 

[techead]

Picture of your cards please as they are placed currently then I will show you why.

 

[Tjoker]

Sucking in warm air from other card?

 

[techead]

If you say same core and memory, I take that as overclocked ? As I have it each card manufactured is different due to production variation and that fixed settings serves as the base specification before overclocking, you thus have to overclock each card individually according to its optimal settings.

When you tested with -200, was that on both cards at once ?

Correct, -200 on core on both. Both cards are identical make and model. Maybe the cooler is not placed properly or something... who knows... I can live with 62 though. (down to 58 at the moment)

 

[techead]

Sucking in warm air from other card?

Yes, I think you are spot on.

Once I get my risers and I am able to put this thing together properly (with the other 4 cards) then hopefully this will go away.

Still, +700Mhz MEM clock on 47C with a power draw of just over 100W... I'm happy with that

 

[Budza]

I guess the one on the right is the hotter one?

 

[srothman]

Intel chipset up to date?

Also what does event viewer log when your screen goes blank and on again.

"Display driver nvlddmkm stopped responding and has successfully recovered"

I'll go run through the updates again tonight, but I'm pretty sure I updated everything that could be updated last time round when I installed the cards and found the BIOS to be way out.

 

[etienne_marais]

Correct, -200 on core on both. Both cards are identical make and model. Maybe the cooler is not placed properly or something... who knows... I can live with 62 though. (down to 58 at the moment)

Yes, but I'm trying to say that two identical cards are not really identical, because of the micro technology there is variation in each card, that is why a base rating serves as a specification when you buy the card and then you can overclock to the ability and behaviour of each individual card. You have to find the sweet spot for each. b.t.w. with no under/over clocking how do they compare (especially regarding temperature). There is also the possibility that one of the cards can be considered relatively flawed and not behaving like the rest of the batch from the production line.

 

[etienne_marais]

Sucking in warm air from other card?

ok, that makes sense as well

 

[techead]

I guess the one on the right is the hotter one?

correct

 

[techead]

Yes, but I'm trying to say that two identical cards are not really identical, because of the micro technology there is variation in each card, that is why a base rating serves as a specification when you buy the card and then you can overclock to the ability and behaviour of each individual card. You have to find the sweet spot for each. b.t.w. with no under/over clocking how do they compare (especially regarding temperature). There is also the possibility that one of the cards can be considered relatively flawed and not behaving like the rest of the batch from the production line.

yes, I totally understand what you are saying. I think that in this case however, it's just sucking warm air from the other card

best way to confirm would to take the card on the LEFT out and run the same test scenario. Not too keen to stop mining to do that though

 

[Thor]

Sucking in warm air from other card?

Bingo

 

[Thor]

Sucking in warm air from other card?

My cards run like this:

GPU 1 - 39 degrees
GPU 2 - 45 degrees
GPU 3 - 55 degrees
GPU 4 - 62 degrees
GPU 5 - 71 degrees
GPU 6 - 79 degrees

Then I added a small fan between the last 3.

I am now working on something like so:



Just smaller and more compact, but it must fit over 5 rigs since we have 5 per row in the rack