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Fittings & Elbow Impacts to CPU Temperature (TEST RESULTS) - Page 2

post #11 of 21
Yes. The hardware store nylon variety fittings can be a bit more restrictive, but nothing to be worried about either.

I think the restriction would have been more important in the earlier days of watercooling when blocks needed 1.5+ GPM to prevent laminar flow.
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post #12 of 21
Thread Starter 
+1

In the past we had some differences from today.

-CPU blocks in the past were much more sensitive to flow rate than today (large pins and less surface area, heavily nozzle dependent).

-Pumps in the past like the old pond pumps were more high flow/low pressure type pumps.

-Very few CPU block tests ever tried to evaluate the impact of flow rate.

-Elbows in the past were typically your nylon type which had a much smaller ID and were more restrictive.


We still don't know too much about GPU temperature impacts, but I suspect it's more critical based on it's larger pin/channel designs.
    
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post #13 of 21
Quote:
Originally Posted by pangeltveit View Post
I have 2 of the 90 degree ones in this test
No worries.

They add less than 1/5th of the restriction that your GPU block does.

Not hurting your temperatures at all.
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post #14 of 21
That was really interesting, thank you. +1 as usual for Martin!
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post #15 of 21
Quote:
Originally Posted by charliehorse55 View Post
No, you don't. That was the entire point of the article. Even the most restrictive 90 degree fitting imposed less than 0.08 PSI of pressure drop at 1.0 GPM. Even if you added 10 of them to your loop you would still only be adding around 0.8 PSI of drop, which is less than most waterblocks.

Considering even the lowly XSPC Dual Bay Res pump has 3.6 PSI of head @ 1 GPM adding a few elbows really isn't going to do anything.
i'm not to sure if follow this...

i have 30+ rotaries, 30+ compressions, multiple d-plugs and sli fittings, 12+ barbs...

when i run a single mcp355 the flow is very slow(practically in drip mode)... as i turn on another pump the flow visually increases, turn on another pump and the flow visually increases, turn on another pump and now the water is flowing very nicely...

so i think if you were to add 10 90's you would actually add the 0.8psi drop for a total of 8psi drop.... i really don't know... but i do know that more pumps will increase flow when there is high restriction
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post #16 of 21
No, it's 0.08 PSI per

0.08 * 10 = 0.8 PSI

Also, how many pumps do you have?
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post #17 of 21
Quote:
Originally Posted by charliehorse55 View Post
No, it's 0.08 PSI per

0.08 * 10 = 0.8 PSI

Also, how many pumps do you have?
hehe... my eyes are bad... yeah 0.8psi would have been bad per fitting...

i'm running 4 pumps... i'm sure i could get away with just 3...

1 pump running = drip mode
2 pumps running = slight flow increase
3 pumps running = flow increase very noticeable
4 pumps running = flow fills the entire diameter of fitting and shoots out
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post #18 of 21
seriously dude?
your fittings/blocks probably cost more than your actual components.
post #19 of 21
Yes very serious.
And what's wrong with that. Atleast it will probably last longer than any of my components.
Built it for looks and performance second. Here we go again about a waste of money.
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post #20 of 21
What would be interesting.. not sure if its been experimented with but different IDs of tubing and how that affects restriction.

Having a few 90 fittings may be lessen using larger tubing.
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