Bitcoin Forum

Does the summer months have an effect on the difficulty?  If you spend most of your time in the same room as GPU's mining 24/7, it's gotta get pretty uncomfortable.

There was some of that.  But this summer, if the heat doesn't shut them off the rise in difficulty vs. rise in price definitely will.
 

Maybe bitcoins but there are also altcoins
1:1 clone bytecoin lol

I use water cooling, strapped to the copper-pipe going into my hot-water tank and sprinkers and tapped into my pool-pump/hot-tub...

Free hot water, lower AC bills, lower electric bills (higher heat = higher resistance = more power consumed)...

Not to mention the hot air is all pumped into the attic, where the 150F GPU air is cooler than the 212F+ attic-air.

That is called ghetto geo-thermal cooling... lol... the cool water coming from underground is a constant 65F here. And I drink coffee all day long, and flush, and shower, and filter the pool, so cooling isn't lacking.

Nice elaborate setup! How what is the depth of the water table and how deep does it extend?

I wrote the --auto-fan and --auto-gpu features so I wouldn't have to stop mining in summer... Of course if you can't get the heat out of your house or it's in your own room or whatever, that's a different problem.

I'm moving my rigs down south since it we nice and cold down there.

Hmmmm. That doesn't sound right. Most of the heat produced is power loss on the die, which has a silicon substrate. Silicon is a semiconductor, so the resistance actually goes DOWN as temperature goes up.

Must be some other reason power draw increases at high temp.

I move my mining rigs into the garage during the summer. I don't push my cards hard (1000mhz core for 7950/7970 mining BTC) so temps are no problem. Also using riser cables and getting the GPU's away from each other drops the temp a good 10 degrees Celsius on each card. I just spread my mining rigs out over a couple folding tables.

I open the window.  Pretty simple solution.  Then again, it's not exactly very hot here. :)

Summer in the Northern or Southern hemisphere ?

Why not stick your rig in the huge open space in your ac unit where the air sucks in? Behind the filter of course so you don't even get dust? Free fan, and hot air is sent outside.

Im not sure you understand how AC systems work. you mean the condenser (outside part)?

I use geothrmal heat and cooling with a desuperheater. that means the heat from cooling the house goes into preheating the hot water. then my actual hot water heater is an air source heat pump which takes the hot air from my basement and puts that heat into my hot water tank.

free hot water from mining and cooling my house.

win!

I'm doing mostly scrypt so there is plenty of heat from my rigs. This type of device is sucking the heat out of my mining room, 10" seems to do very well  ;D
Running at 50% speed when outside temp is around 15C. I can double or even triple the blowers if thats necessary.

http://hydroharrys.com/catalog/images/vortex-10inch-fan.jpg

Related video -- weather.com summer temperature forecast (for USA only):

http://www.weather.com/video/the-summer-forecast-is-in-36320

Would love to see this! Can you post some pics of your setup?

I don't intend to stop mining, but it may kill me because summers get fairly hot (~35-42C avg). I may spend the extra electricity and use an extra breaker to run a separate AC unit.

None.  ;D

Same, we just open a window on the north side and one on the south side and it's like living in a wind tunnel, air is sucked out because of the temperature/pressure difference on both sides of the property.  ;)

I wont stop, but I will probably be naked a lot with a fan aimed at my balls.

Too much info, I know. Sorry  :-X

He's got a plan.

as they say on the interwebs.. pics or it didn't happen  :-X

I will probably just downclock the cards so temps stay below an arbitrary limit. I have settled on 70C for that  ::)

Lovely

Same except I have a cap at 80-85C.  The building where I have them shuts off AC on the weekends not sure now much I"m going to have to downclock when its 100 outside lol.

well, i didnt expect to still be running the GPUs past mid-march or so.

the temps won't be 95+ F (maybe one or two days) on a regular basis for another 45 days or so... and i dont expect to be running GPUs anymore by then.

but, uh, if it is still worth my time, then, yeah, i'll mine in the summer.  did last summer, too.  just set all the 5830 and *5870's to 0.95v and the 5970's to 0.99

Hi Isawhim,

I think your concept is great. I actually believe that the future of mining (especially on GPUs) is dependant on our ability to recycle some of the heat lost.
I'm working on a new 24 GPU rack project (https://bitcointalk.org/index.php?topic=191117.0) and I will experiment with oil cooling in a few weeks. You can find details about the oil cooling option here: https://forum.litecoin.net/index.php/topic,2682.msg18234.html#msg18234
My idea to optimize the heat recycling is to use an Oil/Water plate heat exchanger, which is very efficient and compact.
http://thumbs3.ebaystatic.com/d/l225/m/mFEYW8-VmXxy-REDwW9JH7Q.jpg

With the thermal capacity of the oil, one shower might be enough water flow to cool down a setup for 1 hour or two. If you had the pool (which will "never" go over 40C) you can truly reduce your electricity bill by a considerable amount by never having to warm it up again.
I started a list of potential applications that would allow for the recycling of the heat:


If you think about it, if we could recycle 80% of what's now lost, there would not be that much interest in the ASIC anymore.

Maybe I should sell the 24 GPU rack as a space/water heater ;-)

Your rig works in theory but in practice I don't see how you could possibly keep that cool.  I have each card 5 inches apart and if I get them closer then rise 5-10 degrees each.  That's with only 2 next to each other, if I put 3-5 near each other it goes up 20 degrees.  I think you should redesign it with an AC unit attached cause 24 cards is gonna cook toast.

61° at 25 tamb, so no problem for me

As someone living in South East Asia that has >80% humidity all year round and an average  25°c - 31°c temperature everyday, I find this thread amusing.