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  Topic Review (Newest First)
03-27-2019 11:17 AM
NewUser16 Keep in mind that different blocks might require different flow rates to archive the same temperatures. E.g. I'm pretty sure all Heatkiller and Aquacomputer GPU blocks can run at very low flow rate (Germans or I should say Europeans emphasize on silents) and yet.. keeping temperatures low, on the other hand e.g. in order for some of the EK blocks to archive the same temperatures their blocks require higher flow rate.



Like someone suggested earlier, you should test all of the options to be content with both, noise level and temps.
03-20-2019 10:38 PM
ttnuagmada You should absolutely consider more rad space. 63C under load for a GPU only seems good until you realize that you could be in the 30's. Nvidia GPU's drop bins starting at 50C.

edit: sorry, just saw that the case can't handle more than that.
03-19-2019 11:15 PM
mrsarden Thanks guys. Just did a couple of benchmarks and the sweet spot for me is around 3300 RPM. Not much noise and cools properly.
03-19-2019 09:04 AM
ciarlatano
Quote: Originally Posted by NewType88 View Post
When I'm stress testing and adjusting flow in real time, I noticed temps changes immediately. I get a 4 degree difference between 1800RPM and full speed. At some point there is a diminishing return on pump speed, but I haven't seeked what that RPM is for me yet.
There is definitely diminishing return. In my case, it is a negative return. My cooling improves from 800-~3600 rpm, above that I actually start getting increased temps. Much has to do with the loop, restriction, etc. There is no hard and fast rule.
03-19-2019 08:13 AM
NewType88 When I'm stress testing and adjusting flow in real time, I noticed temps changes immediately. I get a 4 degree difference between 1800RPM and full speed. At some point there is a diminishing return on pump speed, but I haven't seeked what that RPM is for me yet.
03-18-2019 07:58 AM
skupples any time.

Remember to let the benches run long enough to get a good reading. Nothing crazy, maybe a few loops.
03-18-2019 07:52 AM
mrsarden
Quote: Originally Posted by skupples View Post
as stated, if you don't have a flow meter, then just use a staggered approach.

Start on the lowest speed, running all your blocks as hot as possible, take temps

bump up to the next speed, test, take temps,

etc

compare, win.

flow & pump are one of those HIGHLY oversold things here on OCN, kinda like PSUs, but worse.

More flow means almost nothing above .5, and literally nothing above 1.0. & the difference between the two are within the couple degrees at most.
thanks. will try and report back.
03-18-2019 07:46 AM
ciarlatano
Quote: Originally Posted by skupples View Post
as stated, if you don't have a flow meter, then just use a staggered approach.

Start on the lowest speed, running all your blocks as hot as possible, take temps

bump up to the next speed, test, take temps,

etc

compare, win.

flow & pump are one of those HIGHLY oversold things here on OCN, kinda like PSUs, but worse.

More flow means almost nothing above .5, and literally nothing above 1.0. & the difference between the two are within the couple degrees at most.
Great advice. There are a lot of tests showing that performance shows little increase over 0.5 gpm. But, by the same token, can fall off dramatically below in may loops. Using the method you recommend should find that point pretty easily and effectively.
03-18-2019 07:26 AM
skupples as stated, if you don't have a flow meter, then just use a staggered approach.

Start on the lowest speed, running all your blocks as hot as possible, take temps

bump up to the next speed, test, take temps,

etc

compare, win.

flow & pump are one of those HIGHLY oversold things here on OCN, kinda like PSUs, but worse.

More flow means almost nothing above .5, and literally nothing above 1.0. & the difference between the two are within the couple degrees at most.
03-18-2019 07:26 AM
ezveedub You will get bubbles if the flow rate is too fast for the reservoir to allow them to bleed out and they get reintroduced in the flow. Add foam to the bottom of the reservoir or offset return will prevent this.


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