• Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
    Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.

High Flow CPU Loop - Should I Get A Restrictive CPU Block?

liquidfluidity

liquidfluidity

2[H]4U
2FA
Joined
Dec 28, 2006
Messages
2,938
My loop is going to consist of a MCR320, 1/2" fittings , MCP655 w/XSPC res top/tank, and a cpu block. Everything I've read says that my loop will be quite free flowing. If I put a somewhat restrictive cpu block on, will this help bring down cpu temps since the water will have a little more time in the block to absorb more heat or am I looking at this wrong and I should be trying to push as much water through the block as fast as possible? I'm looking at either a Raystorm(free flowing) or the new Swiftech Apogee HD(more restrictive). This is for a cpu only loop - for now ;) cooling my I7 970(on my Classy) with a healthy overclock.
 
You're looking at this wrong ;)

More flow is not a bad thing. Remember, although in a higher flow system less heat per volume of water is transferred, more volume goes through the block so overall heat transfer is the same per unit time.
 
The XSPC Rasa is one of the best blocks in terms of heat transfer, and it's highly nonrestrictive.
 
I think Tsumi is referring to the XSPC Raystorm, which is not restrictive at all. It's also a top performer (up there with the Koolance 370 and a few others which possibly trail slightly).

The XSPC Rasa was a bit more restrictive, but still a good block.

I'd go for the best compromise of performance / flow / price. The Raystorm is it, IMO.

There is no reason to want lower flow in this scenario. It's possible that a 24/7 pump running w/o restriction is a bad for pump longevity, but none of our systems resemble that setup.
 
More flow the better. You want the coolest water in the block possible. Its just like air cooling, cool air cools better then warm air.
 
Yeah, you're right, I meant the Raystorm.

Lack of sleep due to finals will do that to you :p
 
I've had the same thing on my mind for some time now. Has anyone actually ever done a study with loops to see if there are issues with loops that are not restrictive enough? Being the old hammer mechanic that I am I've always wondered why there are no built in flow limiters like in automobiles radiators. The systems differ slightly as the thermostat in a car is also there to let the engine warm to about 180f before letting water pass to the radiator. But that's not it's only job.. it's also to make sure that water is not simply cross flowing from the pump back into the block. If the water passes through the radiator too quickly it does not have enough time to shed off the heat and eventually the motor temps will rise. With the head pressure and flow rates on these comparatively smaller systems and the massive radiator setups some people use I wonder if slowing the flow in some cases would result in a net lowering of overall system water temps? :confused:
 
No, in an automotive cooling system the water has to is under pressure and goes above 212* regularly. Water in a pc loop goes up but only a few degrees
 
You must log in or register to reply here.
Back
Top