My theory has developed into the theory that when the evap has slush all over it, it doesn't work well. Not sure if it's my whole brew, or if it's just part of it seperating and getting stuck to the evap. I have been scooping it out with a plastic ruler. Hopefully I'll get enough of it out.

My solution to that was having one submersible pump in the bath to circulate coolant thru the fins of the evap AND having the return line pour directly onto the evap fins.

I think I missed telling you that thru this thread :blush:

ny - Get in here and make some submissions for the contest. No matter the score, we are all going to get better at SPI. :thumbsup:

No I remember you saying about pouring the return on the evan if possible, but nothing about submersible pump. I have 1 and could try that. Thanks.

Contest?:ohcrap:

lol, yah "Contests", one of these days you need to drift outside the walls of this thread and check out the other happenings around here ;)

Yeah I was thinking that too, but have been very involved in this particular project. reading the rules of the contest now. I can run super pi ok, but I don't know what to do with pifast.:blink:

EDIT: I cannot participate. I have no non-chilled system to use. Sorry.

That was amended and chilled water is fine - no more excuses. :taunt:

:ohcrap:

I installed the submersible in the bottom of the tank. Should be moving some liquid down there. I have super pi mod 1.5 xs is that ok?

That is the one we use. You can get the PiFast bench from the link on the first post of the contest. (RomDom just didnt change the color of the linky so it kinda blends in lol) The desktop background pic is also there. :)

I tried pifast and it asked too many questions I didn't know the answer to. I don't know what settings to use.

run the BAT file not the EXE

if you want to run the EXE the answers are...

0
0
10000000
1024
0
You can edit the BAT file to include PAUSE before it runs pifast, to set priority/affinity on the cmd.exe

yeah pifast comes with a batchfile. just click the batchfile it is automatic after that

Thank you...it seems I have the file extensions hidden. I'll get on that tonight after the chiller gets cold. On my 2nd batch of fresh coolant today :shock: back to 70% antifreeze and 30% water....should be good to about -70 Celsius now. I'm done playing around with that shit I should have just modded the block in the first place. I've got ~18 gallons of various types of coolant I don't need.

Heyyyy dude. Welcome to where I have been lately. :blink:
Hows everything? I finally got my tri-fire going.......and on slightly sub-ambient water too:)

OK well after a fresh new batch of 70% antifreeze and water the chiller still goes below -30 C, just not when there is slush on the evaporator. Should get down to -45 or so by morning I'm hoping. Seems like I have hit a wall with my OC at ~4800MHz. I was able to boot 4765 the other day, but haven't been able to get 4800. The chiller is working the best it has though, so maybe with a little colder temps.

Awesome bro, it was just a matter of time before you figured out the ideal setup for your chiller. Maybe you'll see a dramatic drop in temps at the cpu this time. :thumbsup:

Still waiting for the thermometer from Hong Kong. I could stick this old F probe in there but it's a lot of work to remove the block and all and I'm not sure just how accurate it is. EDIT: it doesn't even read negative when I stick the probe in the bottom of the chiller @ -10 F

I must stiffen up the gpu loop mix a little as it froze in the lines last night, but no slush on the evap today.:thumbsup:

It seems that once the air gets out of the antifreeze it thickens up some or something, because my pump isn't moving as much liquid as before. I need to add some water I guess.

Here we go again.............:blink:

Only difference is I removed the submersible from the chiller so it wasn't adding any heat to the equation. Weird shit if you ask me.

Probably wouldn't ever have a problem with LN2 not getting my cpu cold enough to suit me.

Hehe, definitely not bro-chacho and if you wanted to run at -2c or -196c, you control that with the amount of pouring you wanna do. :good:

Have we successfully created another sub-zero maniac?

I'm already a sub-zero snowmobiling maniac. :thumbsup:

Does anyone make their own LN2?

No but we've looked into every way possible. They have mini ln2 factories but they run into the 40k price range.

Wow that's way higher than I expected.....I was just looking at one.

How much does it cost to keep a good supply of LN2 around?

Well, you prolly coulda picked up a 35L dewar with the money spent on this chiller but I'm not pointing fingers or anything :taunt:

Need to check your local airgas, gaspro, or other gas supplier in the area, call them, they give quotes on ln2 by the liter prices quick and easy. Prices vary from place to place.

A decent dewar will hold Ln2 for about a month. 35L should hold you down for a good amount of sessions as you start out.


They also rent out dewars, check prices on that too. OR, drift thru e-bay for a cheap one.

Yeah but I like my chiller machine. :blush:

I'll call Chenango Welding Supply tomorrow. Thanks for the info dude!

OK I'm back with an update:thumbsup:

First thing this morning my pump quit pumping, so I went back to the submersible(not submersed). And since I had the chiller drained already, I decided to take apart and clean the waterblock which actually had some deep down shit right in the center that I never cleaned out before today. It took a lot of work to get it out. :eek:

And since I had the block apart I broke out the grinder again and put 4 more channels in between the first 4 you see in the picture.

Then I decided to use the cheap Radio Shack silicone to try for a thinner layer. The AS Ceramique always ends up too thick it seems.

So the combination of all that stuff has netted me a nice improvement...even with the addition of the single GPU loop making a single pass through the chiller.

Right now the temps are better with the coolant @ -30 C, than they ever have been @ -40 or below. The temps are steadier and the coolant stays cold longer, with this slower pump, and the cleaning, and the additional modifications...ohh and thinner TIM.

I'm extremely pleased with it finally. I may try for 5Ghz again in the AM.

My repositioned probe on the block says 7 F, which is ~ -13.8 C.....lol Windows programs say 3 C, BIOS program says 0 C. :Dizzy:

Nice work bro, never give up never surrender! :hammered2:

Dude with the coolant at -30.......the chiller can almost keep up with the heat from 4.5GHz/1.5v with the GPU loop in there.

In a 1/2 hour @ idle the coolant temp has risen less than 1/2 a degree. .....in fact I'm not even sure it has risen.....ahhhh I don't think it's gone up. It's hard to tell looking @ this regular outdoor thermometer.

Yessssssssss, I am so happy. 4.5GHz sub-zero racing. Everything seems better sub-zero. :) Gonna let it idle for another hour just to be sure.

QFT! :cool3:

OK it's OFFICIAL now!

I accidentally left the pump running all night, which not only limited the cooling ability of the chiller by a few degrees, it also caused a bunch of unnecessary condensation. So I broke it down and made sure nothing was wet before I started up.

The chiller cooled down another 3-4 C while I was working on the block. The block is 3-4 F right now @ 4.5GHz/1.5v......which is way sub-zero in Celsius. :cool3:

EDIT: all zeros picture added :thumbsup: Goal reached.

Sorry about the picture size, I think on a larger monitor than I have you could easily read the zeros.

You run thru all the benches now buddy?

Sweet chiller bro.

Just want to chime in on the making your own LN2 question.

There have been some retail attempts at home LN2 making setups.

Problems:
1) They make it too slow to be very useful for our purposes. 1L/day doesn't cut the mustard when you consider that the stuff is evaporating while you're trying to make and save it.
2) Still expensive.
3) The energy costs of running it all day to make your 1L of LN2 cost more than buying 1 L of LN2.

Same problem with getting a big CO2 cylinder and making your own DICE. Still much cheaper to just buy the DICE.

EDIT: Just having some fun right now.

Benches are on the list for eventually. I don't really know much about benching yet. My new memory is shipping from Taiwan today, and although only 1600MHz cas7 I'll feel better about doing benchmarks with a good working kit installed.

Only benchmarks I've done are racing and seeing that the cpu now stays cold enough to run @ 4.5GHz/1.5v for many hours.

I gotta get my system set up better for benching. I plan to do a XP install, but I have to clean off that HD first........so how will I find time to race?

I guess while waiting for the memory I can find the time to do the OS install.

-------I just switched from air-cooling in June. I'm on my way to full blown addict, never fear. Benchmark running is inevitable.

Thanks Patch.:)

1600 7-7-7 is the sweet spot for AMD ... like 1000 4-4-4 on AM2.

Faster is not always better, you might find your self dropping it to 5-5-5 and booting it at 1300 ish :)

Yes, I have also heard that the lower timings/frequency might be faster. These ones are 7-7-7-24 so we shall see. My other kit was pretty nice.

OCZ is real good at binning their stuff to whats it capable of so I would not expect much out of it... 7-7-7-24 whats that PSC chips?

I ran my other ones (EB edition 1.8v) @ 1800+ 1.9+v a few times....maybe I killed them.

EDIT: on the subject of the chiller....I have decided to rearrange and put the chiller/bench table in the center of the room instead of off in the corner/closet. It will make everything way easier....now that I have stood hunched in the closet working on it for 3 weeks :blink:

Look at the carnage leftover from the Chiller build...there are 4 more jugs in the garage with that highly flammable denatured alcohol mix in them.

Hehe .... I'm cleaning the computer room for the 1st time since starting the Chiller build.:shock:....like a bomb hit, and I'm still looking for the 3 gallons of coolant that leaked out a couple weeks ago.;)....seriously though.

I must have fucking lost my mind. Oh well no one said it would be easy, and it works awesome now so it gets an overall :thumbsup: from me.

EDIT: I'll have a nice photo shoot tomorrow after I get it moved out in the open. Fortunately I built it on a 4' x 2' coffee table, so I can just unplug and drag it across the floor.

Oh the insanity of it all, Great Going bro :good:

No one ever said being cool was easy.

Nope. :ohcrap:

Here is a nice chilly bedtime picture from last night....I could insulate the pump better, but it's in a cooler so..............

Awesome!