Thanks for the info, saves me a lot of time in trying.

Space is an issue for me, also electricity is not that cheap, so adding a gpu to the same mobo/cpu/ram always helps me squeeze a bit more Mhs/J.

Everything except usb3 is allready off to save every possible amp, and I can drop it too, just need to figure what ports are the regular usb's and what are usb3.

A quick glance trough this thread did not reveal an answer to me, so I'll ask:

Why are there only 7 gpu instances in bamt.conf ?
Amd drivers support 8, correct ?
I know getting a motherboard to recongnize 8 is impropable, but I'd like to see if I get lucky, if there is no software issue to overcome.

Short update: 6gpu's and 2Ghs in there, pulling ~840w atm and the cooling seems sufficient atm, Im looking to cram in one or two more gpu's as soon as I find solid info on what is the maximum for linux. Efficiency is fairly shitty 2,39MHS/J, mostly because of the 6990, I just might have to let that one go. Unless I manage to hack up a working bios with 0.9v and 150mem.

Your kind words inspired me and today I accomplished something Ive been trying for four months now, I own 5970's two of them, they cost me 331$ each and when you factor in the tax (someone had to pay to import them here) that is equalent of a price of 269$ for someone in a country without nazi-ass protectionistic taxation.

 

That is an option I am contemplating, but my problem with the available 5970's is their age, which in most cases is unknown. Im also activeley shopping around for 5970's anyways, but atm the cheapest around is ~410$ when delivered, also I'd need to find one in Eu to avoid paying an additional 23% at customs.

Miners using bamt and a 6990 at voltage 0.9 memory clock 150Mhz: please report in, I need help!

What particular card do you have, did you modify the bios, I can has a copy of your bios, plz ?
Did you accomplish these settings without editing the bios, how ?

..Ive edited the bios in mine 6 times now, and havent gotten anything that would even start mining out of it, I have prior experienc if doing this with a 6950 (the shadermod) so Im starting get desperate ase the card heats up like a m*********er and eats up all the electricity it can get.

Hi,

Me and my 6 gpu farm are back, I lost faith with p2pools luck (12% missing since forever). Any big changes that could require my immediate attention in the last 2 months ?

That's pretty much something I havent tought of yet, sadly I got next to no testing at sub-zero temperatures worth mentioning, I'll just have to see how this goes in 6 months or so. I doubt it will be fast to happen.. one solution I can think of is hacking up a switch that would reverse the direction of all the fans, any toughts on that ? Reversed airflow for 1h/day would prolly clear up all the buildup within the remaining 23h.

Should the entire rig come to an halt, lets say a power-outage, during winter I'll propably have to bring it in and let it dry before restarting, during the summer the residiual heat within the case will keep condensation from happening, atleast to my experience: the longest power-outage I've seen lasted 1h 15min and thats in 30 years.

Nice!
That is pretty much the neat, nothreathening-looking design I was initially going for. What are the cards in there, and whats the exact fan you used ?

The additions/ changes to the airflow are:

One more outblowing fan, on the back side of the box, protected like the ones initially installed.


The second, and far more efficient tweak was to cut a hole for the 6990 I installed to breathe out of, this effectively dissipates a third of the heat produced by the 6990, at a fan speed of 60%.

I know it's ugly, but man does it work. Had the card been further away from the case-door I propably would of have added a tube of somekind.

I had no idea on how these "stock-cooled single small red fan" -type cards cool them, untill I got this one. The solution I stumbled on is very little short of excellent. When you have either side of a card like this close to the rigs outer walls, cutting and shaping an opening that allows the card to blow out heat is very effective. I have been running the card for 859Mhs (at clocks of: cores 970Mhz, memory 200Mhz, core voltage 0.9v, stability: 37h and counting... no crashes, just havent had it running that long at these settings) at temperatures of 63-70,5c, while the outside temperatures have been swinging between 0 - 9c. I'll propably have to throttle down a bit for the summer but Im happy.

The bottom line here: I am now a firm believer of treating dual-gpu cards with stock coolers like PSU's in regular computer cases: separate it from the rest of the airflow where possible, obviously this does not apply to open-frame rigs.

I also redid the entire cable management thing whilst swapping the motherboard, I'll post a large picture of it when Im able, but atm Im holding out for the wifes camera. It's better, not good, It wont ever get good in this case : /  I used ~50 cable ties, but theres simply no place to hide any wires neatly.

I also pulled out the 5830, I have no idea whats up with the card... It started getting temps of 86c nomatter where in the rig I put it. It's now running indoors in a rig labled "I hope this crap dies in a fire". Personally I wouldnt reccomend getting one of those cards for anyone. Mine is a reference-model asus, with stock cooling it was hot loud and horrible, with an arctic cooling fan it's still warm, silent and crappy. The efficiency is just utter shit. It's either undervolted or stable, never both.

I did inform him, the only reliable docs I have are 2 e-mail adresses and a bank account, I also have a phone number I have not called yet that I know is atleast a working one, but the nubmer cannot be docxed further. I know one of the emails belongs to a female who's (or atleast was some years ago) married and being cheated on and who has some years ago traveled to Bulgaria. I know the other email belongs to a person who played a lot of xbox during 2011 and that he has an youtube account with some music content on it. I also have an address I havent yet attempted docxing yet, and a name + bank account of another induvidual, pressumably the female.
You wouldn't happen to live anywhere near Savonlinna ?


Nice, I am the sort of petty person who just "might" choose to take revenge over a matter like this.

I for one would love pictures of the building of your outdoor radiator.

You're correct about the place, a fairly new account with some positive feedback. What did you end up paying for a 5970 if I may ask ? ..also any warranty left, stock cooler.. ?

I managed to push my 5770 to 0.7v, core 920, memory 200 ...for a solid 198Mhz, they might be the most efficient cards out there, but you's really need to cram 6-8 on the same mobo to get the most out of them.

5870's react very well to undervolting, however finding the otimal settings can and will take long, each card is an individual. I for one am running two with the following settings (I trust these to be spot on with my miner/kernel and other mining conditions, including electricity price, difficulty, exchange rate...):
 #1 core 872Mhz, memory 200Mhz, core voltage 1.000 for 376Mhs
 #2 core 927Mhz, memory 200Mhz, core voltage 1.000 for 395Mhs

You can also go as low as 0.95v on 5870's but I havent started tweaking at that voltage yet, propably will when the block reward gets halved.. depending on the exchange rate and difficulty ofc.

Localized e-bay style site, paid the item with a bank transfer, never recieved the card... got some explanations for a while, nothing now. A police report has been filed, however I doubt I will ever see any of the money.
I have done about buys/sales online, of which ~300 on this particular site and this is the first time anything like this happened.

I havent had the time to update this thread as I went along, but a lot has changed in a short time:
- I got scammed for the price of a 6990.
- I bought a 6990
- I swapped out the mobo/processor/memory... just couldnt get the pci-e 1x slots working on the last one.
- I had to add ventilation for the 6990, the case now has an outblowing fan on the backside and a somewhat ugly but efficient ventilation hole in the front door. For those of you unfamiliar with 6990:s the stock fans on these can be used to dry hair with proper overclocking and at 100% speed they sound like a leafblower in the room with you. Needless to say im not running the fan at 100% Atm Im pulling 858Mhs from it and the core temps are 64.5 and 67.5c. It dosent appear to be very efficient, the right Mhs/w is down to 2,2 atm, but Im not done yet.
- I added a fan coontrol unit, wont be needing it for 6+ months tough, could come in handy come winter.
- I broke some risers, they hate to be bent multiple times : /
- I fried a card (inside my apartment, nothing to do with the outdoor enclosure, just me sucking and failing.)
- I redid the entire cable management in there, it's slightly neater. But nowhere as good as I'd like.
- I had to pull out a 5830 from the rig, wierd shit with it's temp rising to 86c in multiple different locations within the rig, however now at an indoor open-frame rig it's doing just fine.

Pictures are coming, eventually.. I've been very busy even without all the mishaps, just to get to this point I've missed many a hot-meal and quite a few hours of sleep.

Nope, not really because it's spring here now, I'd guesstimate the ~1600 Mhs I got in there right now will be able to keep the entire enclosure at 5-10c + . If not, then I just adjust fan speeds.