Safe to put GPU on wood?
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So i’ve been mining for a while now but until recently have only been using two cards. I recently bought another and realized that I don’t have enough space to place it on the mobo so I ended up getting 20cm powered risers from BuyAHash.com (Thanks to iawgoM for the suggestion). So everything is set up well other than the GPU situation. So I created a setup similar to CryptoBadgers (http://www.cryptobadger.com/2013/04/build-a-litecoin-mining-rig-hardware/) except instead of the brace that is shown there I used a yard stick. The way the Sapphire 280x’s I have are designed the card is touching the wood rather than the fan. Before I start it up I wanted to ask you all if this will work and I won’t accidentally fry the card. Thanks in advance for any tips you all have.
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Disclaimer!
If something in your rig against all odds fry, don’t blame me :PAnyways, having the cards on wood shouldn’t be a problem. It can’t short circuit anything and the wood won’t take fire unless you expose it to a few hundred degrees (celsius).
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[quote name=“vizay” post=“53917” timestamp=“1390387762”]
Disclaimer!
If something in your rig against all odds fry, don’t blame me :PAnyways, having the cards on wood shouldn’t be a problem. It can’t short circuit anything and the wood won’t take fire unless you expose it to a few hundred degrees (celsius).
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I thought the same thing however you can’t be too sure ;D. I am going to try it with just one to start. As bad as this sounds, worst case scenario I can RMA the card :-\ -
[quote name=“midwaycy6” post=“53967” timestamp=“1390408771”]
3 rigs with 4 R9 280x on each one and CERO PROBLEMS with WOOD :) .
[/quote]Innuendo? ;)
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[quote name=“vizay” post=“53983” timestamp=“1390412403”]
[quote author=midwaycy6 link=topic=7090.msg53967#msg53967 date=1390408771]
3 rigs with 4 R9 280x on each one and CERO PROBLEMS with WOOD :) .
[/quote]Innuendo? ;)
[/quote] -
GPU touching the wood wouldn’t be a problem.
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Is it safe electrically? Emperically we’ve heard the answer is yes. But what about the science behind it?
Resistance is length X resistivity / Cross section area.
Dry wood’s resistivity is approximately 10^16 Ohms per meter, give or take an order of magnitude.
So for a given piece of plywood, assuming you had a vcc and a ground within 1 millimeter of each other and both pieces were touching the wood, you would experience a potential resistance of about 160,000,000,000 ohms over the surface of the wood. At +5vdc, you would experience a power draw, and therefore a voltage drop of less than 0.0000001%. (that’s well within tolerance, in case your wondering).
Is it a good idea for heat dispersion?
Well, the conductivity of structural softwood lumber at 12% moisture content is in the range of 0.7 to 1.0 BtuÃâ€"in/(hÃâ€"ft^2Ãâ€"oF) compared with 1,500 for aluminum, 310 for steel, 6 for concrete, 7 for glass, 5 for plaster, and 0.25 for mineral wool. If you want to get more specific, In Chapter 3 of the [url=http://www.fpl.fs.fed.us/documnts/fplgtr/fplgtr113/ch03.pdf]USDA Forest Products Lab Wood Handbook[/url], Table 3-11 entitled thermal conductivity of selected hardwoods and softwoods lists thermal properties for various species of wood. So in other words, no not really. Making a heat-sink out of wood would be a bad idea. But for just something to put your MB on, I’m sure it’ll be fine.
tl;dr: SCIENCE BITCHES!!!
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should be okay in terms of conductivity. I am getting a custom made rack for my cards. Spacing on my MB is just awful.
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Kevlar you’re a bloody hero! :D
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[quote name=“Kevlar” post=“54129” timestamp=“1390438912”]
Is it safe electrically? Emperically we’ve heard the answer is yes. But what about the science behind it?Resistance is length X resistivity / Cross section area.
Dry wood’s resistivity is approximately 10^16 Ohms per meter, give or take an order of magnitude.
So for a given piece of plywood, assuming you had a vcc and a ground within 1 millimeter of each other and both pieces were touching the wood, you would experience a potential resistance of about 160,000,000,000 ohms over the surface of the wood. At +5vdc, you would experience a power draw, and therefore a voltage drop of less than 0.0000001%. (that’s well within tolerance, in case your wondering).
Is it a good idea for heat dispersion?
Well, the conductivity of structural softwood lumber at 12% moisture content is in the range of 0.7 to 1.0 BtuÃâ€"in/(hÃâ€"ft^2Ãâ€"oF) compared with 1,500 for aluminum, 310 for steel, 6 for concrete, 7 for glass, 5 for plaster, and 0.25 for mineral wool. If you want to get more specific, In Chapter 3 of the [url=http://www.fpl.fs.fed.us/documnts/fplgtr/fplgtr113/ch03.pdf]USDA Forest Products Lab Wood Handbook[/url], Table 3-11 entitled thermal conductivity of selected hardwoods and softwoods lists thermal properties for various species of wood. So in other words, no not really. Making a heat-sink out of wood would be a bad idea. But for just something to put your MB on, I’m sure it’ll be fine.
tl;dr: SCIENCE BITCHES!!!
[/quote]Hahaha!
Speechless! ;D -
[quote name=“Kevlar” post=“54129” timestamp=“1390438912”]
Is it safe electrically? Emperically we’ve heard the answer is yes. But what about the science behind it?Resistance is length X resistivity / Cross section area.
Dry wood’s resistivity is approximately 10^16 Ohms per meter, give or take an order of magnitude.
So for a given piece of plywood, assuming you had a vcc and a ground within 1 millimeter of each other and both pieces were touching the wood, you would experience a potential resistance of about 160,000,000,000 ohms over the surface of the wood. At +5vdc, you would experience a power draw, and therefore a voltage drop of less than 0.0000001%. (that’s well within tolerance, in case your wondering).
Is it a good idea for heat dispersion?
Well, the conductivity of structural softwood lumber at 12% moisture content is in the range of 0.7 to 1.0 BtuÃâ€"in/(hÃâ€"ft^2Ãâ€"oF) compared with 1,500 for aluminum, 310 for steel, 6 for concrete, 7 for glass, 5 for plaster, and 0.25 for mineral wool. If you want to get more specific, In Chapter 3 of the [url=http://www.fpl.fs.fed.us/documnts/fplgtr/fplgtr113/ch03.pdf]USDA Forest Products Lab Wood Handbook[/url], Table 3-11 entitled thermal conductivity of selected hardwoods and softwoods lists thermal properties for various species of wood. So in other words, no not really. Making a heat-sink out of wood would be a bad idea. But for just something to put your MB on, I’m sure it’ll be fine.
tl;dr: SCIENCE BITCHES!!!
[/quote]Best. Answer. Ever :)
I have setup a few rigs which have been supported by wood until they reached their final destination and always had a little concern in the back of my mind. Guess I can feel safer now too.