|
What kind of core temps are we looking at?
|
|
|
|
I wish you all the best and good luck for the future  |
|
|
|
|
Dry ice is pretty hard to come by in the UK, well at least that's what I've found. I don't seem to be able to get it from any local shops or via any kind of mail order.
|
|
|
|
hmm a little more info on the card like how old the card is ,temps, vram temps
Temps are all under 50c, no idea on vram temps as I'm using linux and can't find a reliable enough tool to check, but given the low core temps I am assuming everything is ok in that regard. The cards are 3 weeks old. Managed to get it stable at 800/300, loosing just under 4mhs compared to 800/150 which I can more then live with. Just strange how only 1 of these cards is acting the way it does when I have multiple of the same doing fine with the other. |
|
|
|
PS: Invest in a big box of smoke pellets like these:  They are great for working out what your airflow is doing. Is that really wise? Is the smoke "clean" or does it leave residues? I would love to see some pictures of someone testing the airflow of a mining rig with smoke. The smoke didn't leave any residue on my fan blades or the inside of my case so I assume it is safe, they are usually used for testing cooker vents and such things like that. If/when I have to test it again I will record a video but it won't be for some time now as everything is setup and working perfectly. |
|
|
|
I've got a 5970 that has happily been mining away at 800/150 for about 3 weeks now and for some reason the past few days 1 or the other core has been hard locking up. I've tried lowering the core clocks back to 725 and even down to 500 while leaving the memory at 150, the bloody thing was still hard locking up on me no matter what. I checked power supply as I am running 3 cards on 1kw psu everything seemed ok, even ran a memtest for 24 hours just to be 100% sure. Out of curiosity I tried bumping the memory clock up to 600mhz and it has been mining happily now for 48 hours at 800/600 albeit loosing 20mhs, but its stable... Anyone have any ideas why it would do that and if I should be worried that it has caused some kind of damage to my card or the others by leaving them at 150?  |
|
|
|
Damn that was fast, was just firing up my client  |
|
|
|
I've been screwed over so many times with form submissions I instinctively copy them to clipboard before hitting submit |
|
|
|
|
Thanks for the quick replies OP, but I am going to pass on this one.
Good luck with your sale.
|
|
|
|
|
Hi, I am very interested, could you kindly answer a few of my questions first though.
Can you take a picture of the camera with your username on display for me please?
How much would shipping be to England - United Kingdom?
Could you mark the item as damaged electrical equipment and put a value of $10 on the customs declaration? (To avoid import duty + tax)
How many shots has the camera taken?
Is the cmos perfectly clear? (No black marks on images when a photo of a white piece of card is taken?)
Would you take paypal?
Many thanks
|
|
|
|
Get rid of those crossfire cables and wedge the cards apart with cardboard or similar material.
Or, get a thin piece of steel and drill holes along it and use small nuts & bolts to space the cards apart using the default fixing holes in the gpus (That's what I do)
Some people will tell you it damages the pcie slot on the mobo but I have been running mine for a good 6+ months and no problems at all.
why do I need to get rid of crossfire cables? It lowers performance and they might not be long enough by the time you space the cards out correctly. |
|
|
|
|
Get rid of those crossfire cables and wedge the cards apart with cardboard or similar material.
Or, get a thin piece of steel and drill holes along it and use small nuts & bolts to space the cards apart using the default fixing holes in the gpus (That's what I do)
Some people will tell you it damages the pcie slot on the mobo but I have been running mine for a good 6+ months and no problems at all.
|
|
|
|
|
850 core clock on your 5970 is rather high, are you sure its 100% stable at those clocks?
Have you tried running the system with no overclocking and see if it still does the same?
Check your error logs, dmesg in linux or event viewer in windows for reasons as to why the system hard shutdown.
|
|
|
|
|
You can only underclock the memory 125mhz difference to the core clock value, if you want to go further you have to flash the bios.
|
|
|
|
Up to 9GH/s now, but I am at my absolute max power draw (4KW/h) without spending any more money on electrician fees. Saving for an fpga farm now  |
|
|
|
I run WRT54GL's with DD-WRT firmware, I have about 8 across my house, from router modes to wifi extenders and even vpn client/server. Works wonders and very cheap, you can also overclock their cpus |
|
|
|
Sorry, don't mean to show off... ok maybe a little Yeah your rigs are the inspiration for the ideas I got in my brain. I was thinking of having the twist of mounting MB "standing up" so the GPU "exhaust" (I use 5970s exclusively) points "up". Best way to describe it would be blade server meets mining rigs. Cold air would flow under the bottom of MB, be pulled into GPU intake, warmed up, and blown out the top where it would have nowhere to go except the exhaut out. I wanted to makes some changes to my garage anyways and now my wife has seen other people have "organized" rigs it might happen soon rather than later. That could work, depending how many motherboards you have in your rack and how you separate them and airflow, my only concern would be the motherboard temperatures. I went for the simplest option to cool mine and my motherboards stay around 40C. People say that hot air rises, which is true to an extent, but you can manipulate it with fans and ducting to go where ever you want. PS: Invest in a big box of smoke pellets like these: They are great for working out what your airflow is doing. |
|
|
|
It's almost fully covered... too much heat will stay inside. Force air cooling. If you force cold air IN unless you trapped a blackhole inside the hot air will be forced out. Now you are right if you just slapped together some shelves and cards that would be bad. It would require some "ducting". Don't laugh at my ASCII "art".
hot air out pulled out
^
| <- bank of GPUs <-|
| ---------------------- |
| <- bank of GPUs <-|
| ---------------------- |
|
^ (cold air forced in)
All the ^ are fans indicating direction of airflow. Only two banks shown but more could be used. Hooking all the fans to a fan controller with some temperature probes in each bank could be used to optimize cooling. Upper bank would need higher airflow because air is lazy. Sorry, don't mean to show off... ok maybe a little My first one, might be for sale. Uses 6 x 5" extractor fans, 4 as intakes; 1 in the top ducted down to the middle of the gpus, and 3 on the opposite side blowing air onto the back of the gpus. Then 2 fans sucking the hot exhaust heat from the front of the gpus.  And my latest creation, same kind of idea as the first one but much more refined and awesome looking. Using 3 x 6" high pressure long life fans, 4 spigot intakes that are split 2 fans to each two sections, then 1 fan on spigots and ducting extracting all 4 outlets.   Got a 5870 out on miner1 and hoping for a replacement soon then ill have to do something to sort out the cooling on the second 5870 on miner1 as its a bit high. Air in, air out, as simple as that + all the hours tinkering  |
|
|
|
|
So I bought 4 PCIe x16 Flexible Extender Cables w/ Molex from their site for a total of $125.
I paid for the fastest shipping option which was another $30 as I needed them asap.
Totalled back to GBP was around £98, expensive for 4 riser cables when you think about it but hey, support the bitcoin economy I thought.
They have been stuck in UK customs office all freaking week and they are demanding I pay an extra £35 for import duty and VAT... What a piss take.
It's not Cablesaurus's fault per say, though it would have been nice of them to mark the package as a gift, its our god dam robbing government, they have to have their share of every fucking penny in this country.
So here I am, 10 days later and still no riser cables, waiting for customs to re deliver my package which isn't going to be sent out until at least Monday/Tuesday if I'm lucky.
So yeah, if you are thinking of importing from USA -> UK, always be careful on duty and import and if I were you, I would suggest choosing the cheapest shipping method as UK customs charge you 20% VAT on the shipping costs! (20% VAT on shipping costs!? How the fuck this is legal I don't know)
/rant
|
|
|
|
|
What is your cpu load like while mining with all 5 cards? If it's close to 100% then that could very well be your problem.
|
|
|
|
|
Show Posts
