RTX3080

[ewmayer]

Originally Posted by Prime95

At the rumored price, the Radeon VII Pro may be more appealing.

Reminds me, been a while since I did any price-checking on legacy R7s (probably because I am definitively done w/my build-out using same, even if by magic I could score some cheap ones, the electricity bills and you'd-need-to-run-the-AC-even-on-cool-days aspect would make it a no-go) ... usual XFX-R7 link on Amazon shows cheapest used @$1349, but I see a new one one eBay for $999, which is not horrible. And even if no "make offer" option, one can PM the seller to do that ... worst they can do is turn you down.

[retina]

Originally Posted by ewmayer

... the electricity bills and you'd-need-to-run-the-AC-even-on-cool-days aspect would make it a no-go ...

Why not duct the hot exhaust to outside?

[Xyzzy]

Originally Posted by retina

Why not duct the hot exhaust to outside?

Or use it to heat your hot water?

[Uncwilly]

Or run a chiller unit in the summer.

[pinhodecarlos]

Originally Posted by Xyzzy

Or use it to heat your hot water?

Problem is the amount of heat: air vs water (specific heat capacity, flow, and temperatures), plus any mechanical efforts.
What’s the heat source, air? What’s mass flow and temps of the rejected heat?

[ewmayer]

Originally Posted by retina

Why not duct the hot exhaust to outside?

Believe me, the thought had occurred to me, but I don't own the space, and the required hackery into, say, the exhaust ducting for the clothes dryer would violate my lease. But in order to give the AC a hand on-the-cheap, couple days ago ordered one of these. Where I live is generally a dry climate, evaporative cooling is definitely a good option.

[chalsall]

Originally Posted by ewmayer

Where I live is generally a dry climate, evaporative cooling is definitely a good option.

You are, of course, aware this doesn't change the enthalpy in a closed system?

Your machines won't notice any difference; humans might actually find it (subjectively) slightly warmer because they can't sweat as quickly.

AC Engineers spend a lot of time learning about the difference between dry bulb and web bulb sensors...

[retina]

Originally Posted by chalsall

... humans might actually find it (subjectively) slightly warmer because they can't sweat as quickly.

I think you mean: humans might actually find it (subjectively) slightly cooler because the sweat evaporates more quickly.

Lower humidity == more comfortable for a human when it is hot.

[chalsall]

Originally Posted by retina

I think you mean: humans might actually find it (subjectively) slightly cooler because the sweat evaporates more quickly.

Incorrect.

The kit ewmayer has ordered from Amazon is basically a bowl of water with a fan. Thus, the kit introduces moisture into the air, reducing the humans' opportunity to add to the vapor pressure of the closed system.

[retina]

Originally Posted by chalsall

The kit ewmayer has ordered from Amazon is basically a bowl of water with a fan. Thus, the kit introduces moisture into the air, reducing the humans' opportunity to add to the vapor pressure of the closed system.

Okay, makes sense. Thanks.

[chalsall]

Originally Posted by retina

Okay, makes sense. Thanks.

Please forgive me for this, but I'm "in that mode".

This is similar to the question "Can I cool a room by running a fridge with the door open?

Cold can't be created. Heat can be moved.

Unless there is a route to exhaust heat, a closed system will always get warmer.