I was only running flammable denatured alcohol today for a short while. I soon removed it and decided the real problem was the block.

It came with the Swiftech h20-220 Ultima Extreme kit, but it is designed for a low volume system.... certainly not with a 3 gallon per minute pump.

I did a lot of stuff today and took quite a few pictures which I'll try to get to tonight. I opened up the block, removed the inner o-ring, drilled out the inlet hole to match the size of the outlet, and cut 4 grooves in it to allow more water and it worked like a charm.

Now if the Chiller isn't full the return coolant shoots right through the evaporator which is about 3 inches from the side of the cooler on that end.

I'm pretty psyched to see what it's like in the morning when starting @ -45 Celsius.

Definitely better already and my pump no longer sounds like it may die soon. :cool3:

EDIT: I just realized I have been mis-spelling Celsius for awhile now. :blush:

Be back soon with some pictures.:)

-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.....:keeporder:

And here is some more pictures showing my new hose configuration and my beautiful new hose insulation. :D $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:ohcrap: DO NOT TRY THAT.......

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

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 :D

Loving every minute of it :Dizzy:

The addiction begins...

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

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.

not too much further now and you're making progress :D

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.