[ny_driver]

-20 Celsius and the flow is about half of what you saw in the picture. Can't really tell by the feel when your hand is submerged in -20 coolant....but I can tell just the same. The pump, however, is still quiet and cool so it's not working hard. May have to cut 4 more grooves in the block soon.

I could thin it with some water perhaps.....it is ~ half anti-freeze and half washer fluid.

I guess the flow isn't so bad yet.....

[ny_driver]

And here is some more pictures showing my new hose configuration and my beautiful new hose insulation. $1.33 for 6' you cant beat that and it's self adhesive, but I wrapped in with black tape.

And for kicks a picture of taking extreme measures DO NOT TRY THAT.......

Going to try for 5GHz again in the morning when it's very cold.

[Kal-EL]

I think maybe you've been stricken with severe overclockaholism bro, we're gonna need you at 5ghz fast before winter. Lord knows the nation needs its supply of anit-freeze! lol

Way to go on the home brew buddy

[ny_driver]

Loving every minute of it

[HITandRUN]

Originally Posted by Kal-EL

I think maybe you've been stricken with severe overclockaholism bro, we're gonna need you at 5ghz fast before winter. Lord knows the nation needs its supply of anit-freeze! lol

Way to go on the home brew buddy

Geez! Yes get that 5G finally! I think there maybe something else holding you back. I think you are plenty cold for 5G. Keep hitting it!

[ny_driver]

I was able to get 4765MHz earlier today, but had pump problems again and couldn't continue trying. I couldn't get 5GHz quite to windows...just to the beginning of the logo. Then either a reboot, BSOD or BlackSOD.

Now using a fairly low flow submersible, but not submersed. It's a pond fountain pump. It is working effortlessly, silently, and nice and cool. Temps are staying sub-zero I'd say. HWMonitor reports no cpu temp, BIOS reports zero or N/A and PC Probe says 1-2c....PC Probe has never gone to zero I'm pretty sure.

I'm also fairly certain higher flow will produce lower temps so I'm going to get another 1 of the marine utility 12v pumps. I ruined the first 1 with such a highly restricted waterblock on the line for so many hours. Good thing for the 30 day satisfaction guarantee! A pump will run a long time if it's not being worked.

Here is a picture of what I tried this afternoon, after my marine pump got very loud like a bearing was going or something this morning. I tried this because the pump gets hot, but it works very good.

It still got hot even with frost all over the tubing. Live and learn I guess. When a pump starts getting hot it's toast.

EDIT: here is a picture of the new pump in action. Still going to replace it tomorrow though.

[Neuromancer]

The addiction begins...

[Kal-EL]

not too much further now and you're making progress

[ny_driver]

Where the heck do I get a temp probe that I can slip under the edge of the cpu?

EDIT: I bought a cheap one @ Ebay.

[ny_driver]

I have now moved the GPUs into colder water as well. I wanted to chill them slightly, so I used a 10' piece of garden hose from the pump to the 1st GPU and made that garden hose go through the chiller through the 2 holes already in the lid.

Now they are idling ~10-15 C cooler( low 30s) and the hoses are no longer hot. I'm very pleased.....I think I may use a longer piece of garden hose and cool them a little more. I decided submerging the radiator would get them too cold and I'd have condensation.