Topic: How to resolve all and any overheating issues :P (Read 1467 times)

I just expected it to use something like 20 watts.

that seems about right. maybe i fail to interpret your sarcasm

I tested a little while ago. It pulls a shocking 70 watts.

how much power does the fan use?

I think I have a good understanding as far as the undervolting/clocks go but get thrown off by power tune

Probably undervolting while overclocking the RAM. You can figure it out if you've got easy overclocking utilities and sufficient understanding.

one guy said he was getting 640 k/hash with 200 watt pull.... wish I knew what he was doing...

Hmmm. Well, I think the CPU on the motherboard WAS being underclocked, and it uses 90 watts in that scenario. Maybe that's why?

thats about what I get on my saphhire 7950s with standard clocks :/

The killawatt meter is measuring the entire mining rig. The computer's running an ultra power-inefficient Pentium 4. It pulls 140 watts itself. (mobo + CPU)  They were the ones before intel put in SpeedStep for more efficient power usage.

That's about 260 watts to the GPU.

200w for just the pc is horrible. I have a dual core athlon in a asrock 890gx board, hard drive, 1 stick of ram, integrated gfx. Pulls 46 watts at the wall. My MSI Z77A-G45 with celeron G530 and integrated gfx, hdd, stick of ram only pulled 25 watts at the wall. If your PC is drawing 200 watts baseline, something is horribly wrong with your setup.

For what it's worth, I ran a reference 7970 with OCCT:GPU:3D with stock clocks and volts with 20% powertune so it doesn't declock itself, and it drew 422 watts on the asrock board with an 80plus gold power supply. That's 376 watts just for the GPU, or 338.4 watts DC factoring out power supply 90% efficiency.

By comparison, the same 7970 on the same hardware with core overclocked to 1100, up from 925, and memory underclocked to 150, down from 1375, and voltage decreased to 1.05 down from 1.112 (some cards are higher or lower volts, depending on ASIC quality), it consumes 276 watts. Minus the system baseline of 46 watts, thats 230W AC or 207W DC.

79xx can use a lot of power. Undervolting helps tremendously. I have 6 7970 on a Z77A-G45 and rosewill lightning 1300W and it draws 1320W at the wall of a 247 volt electrical socket (1350 at the standard 120v). I can manage 6 because I undervolt them each to 1.05v and underclock the memory while overclocking the core. Scores a cool 4 ghash.

Yes, It's a bit ludicrous. The GPU was overclocked there.  NORMALLY it does pull only 300 watts. Considering I only gained an extra 50-100 khs in overclocking, increasing power usage by 100 watts isn't worth it. Running stock now.

Even a laptop running flat out, while charging the battery will likely use about 65W - there's still something going on...

Thinking the same, I measured with one 7950, and it hovered around 300W. Maybe some other load in included? (Like the laptop)

Wow!  414W for one card?     Seems terribly high.  I'm running a 7950, 7850, 6970 and a 4.5GHz AMD FX and I'm only using 790W.

I'd be expecting about 300W for that rig, unless I'm missing something?

I've overclocked my Gigabyte 7950 and when it was in my main computer case with an ambient temp of probably 30 degrees or more (house thermostat said 27, but it was definitely hotter in my room) it was sitting around... 69 or 70 degrees. Not even max fan speed! But man it was so hot and uncomfortable... Now it's in the next room in open air, the motherboard is literally just sitting on the desk, and it's at 63/64 degrees. Much better.

82C is so high! I've never seen my card go over 74 I think it was.

LOL. Nice!

Good thing you're in the attic. My wife would not approve of me setting this up at our house. My 7950's at running in the room next to our bed room.

Simple and easy.

Getting 82C on an overclocked Sapphire Radeon HD 7950 in an enviorment with ambient temperature of 30C. (Our A/C is currently out, I expect core temperatures at least 15C colder once it's running again)