Nice chiller, now u need to bench FAST! and get the results you want before the bath warms up ;)

I already got the results I wanted....racing @ 4.5GHz/1.5v rules. I suppose I'll have to try for 5GHz....should be np. :thumbsup:

After the nostalgia of the new toy wears off some I will start churning out some benchmarks. Going tri-fire as soon as Fed-Ex gets here.

Ah, the prestigious 5ghz club eh?

Every time a clocker reaches his 1st 5ghz, an Angel gets its wings... then promptly flies over to another angel that got its wings some other way and punches it in the sack... :thumbsup:

Well here goes....going to try 5GHz(225x24)/1.6v....be right back!:clapping:And here is a screenshot of 0 celcius.

Now we're talking overclockin :D

I meant 22.5 or whatever came out to 5000MHz, but I have been unable to get 5Ghz to post even with 1.7v and everything else not overclocked, then I tried 4.75Ghz and still had trouble. I tried 250x20, 223x22.5, 209x24, then 250x19 and it just wouldn't do it.

Not cold enough I'm thinking.:ohcrap:

It does 4.5GHz/1.5v like a champ though. :)

bump cpu/NB a bit 1.575?

Even if I haven't OC'd the NB frequency? Or should I OC the NB and add voltage to the cpu/nb?

You were running HTlink at 2400 so I hope you are overclocking the cpuNB (it must be higher than HTlink)

1.575 on NB is a lot unless you are pushing past 3GHz on it. (Not really sure of required voltages for those kind of speeds TBH... doubly so on thuban)

I'm on a Deneb, but either way I never had the NB lower than the HT. Usually keep the HT below 2400 and the NB ~3GHz, but I tried it with both on "auto". For 3GHz NB I need ~1.51v

EDIT: will try again later.

UPDATE: I did a major overhaul tonight. I put the pump, and the feed line below the top of my reservoir, so the system is now gravity fed with no place for air to get trapped. :shock:

I'd say I have gained quite a bit. Right now the BIOS says the cpu is @ 5 Celcius and the reservoir is only @ -15 Celcius. Until now I have had to have the reservoir @ -32 Celcius to even see 5c on the cpu according to the BIOS. When I had the reservoir @ -45 Celcius this morning I actually saw 0 and N/A for the cpu.

Anyways I am expecting it to get much colder. And I'll post pictures tomorrow after I clean up the mess. Looks like a bomb-blast site when I get done doing a project. :eek:

Well thank for letting me know where I live! I thought someone would finally spill the beans one day! :good: ;)

Yo stop drinking the same shit I do Face! :D


BTW: Great job on the clocking mate!

lol....thanks.

Going to get 5GHz ~7 AM today after I sleep and the chiller gets down to -45 Celcius. Must be it just needs to be colder because I get 4.5Ghz on 1.5v all day....lots of headroom there. :D

Still can't get 5GHz or even 4.75. Kept getting the BSOD right after the Windows logo disappears @ 4.75GHz....I tried 1.6 and 1.62v @ 4.75 and only 1.6 @ 5GHz, but I tried 1.7 yesterday without it being quite as cold.

The chiller started out @ -40c and is up to -37c now. It seems pretty watery, but it must have thickened up a little because it's not flowing as awesomely as it was last night.

Mix is approximately 4/5 washer fluid and 1/5 antifreeze. Antifreeze gets too thick I think. I may try thinning with a couple gallons of denatured alcohol, but that's like $30. Good idea?

EDIT: yup as the reservoir temp goes up slightly with the top open I see the cpu temp creep down, so that tells me the flow is picking up a little.

^dont believe your bios temps past 0c :) they are wrong

I made it too flammable and ended up diluting it by taking out 2 gallons of the mix and replacing with water.

I think I need a higher flow water block or something. Even with the system gravity fed, it's just not flowing like I want. :blink:

flamable?

Yeah, alcohol is highly flammable and burns very hot.

What is the ideal mixture of fluids for a chiller? Obviously should have asked this question prior to now. I took out 6/7 gallons of that mix and replaced it with 6 gallons of anti-freeze/washer fluid. Now it is non-flammable again and I have some super high potency washer fluid in the garage. :thumbsup:

Good thing I love wasting all my money.

I may look into a new pump and high flow water block. I plan to continue to use the chiller for 24/7 even though it's never anywhere near 24/7.

And finally...I think the pump is on it's last leg. At least I'll be an expert chiller builder by the end of this.

I never wrote down my mixture and it took some experimenting to find teh ideal mixture for my pump/setup/needs. I too have wasted a ton on the chiller experience :D

Didn't know you were running a flammable coolant this entire time, eek, glad that didn't turn out crispy ;)

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.

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. :thumbsup: 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.

very impressive... you are following right along the addictive schedule.....

by that I mean your daily rig will end up on either ambient air or water, and you will have a single stage by your benching rig, as well as a pot or two.... you can deny it, but it's coming. .....oh and it's reallllllyy fun. all the cool kids are doing it. :keeporder:

Seriously though, this has been one of the most epically detailed chiller threads I have ever seen come together, if not THE most detailed. You just did more than anyone with any amount of ln2 could do... you inspire to create.

my condolences on your impending addiction to the frost.... :cool3:

It has been a long journey from the ceiling to the floor...:D

Ehh definitely! More cold is coming I'm sure!

Yeah you could call it this way! :thumbsup: :D

Awesome, glad OCA was privileged to be on this journey with you into the cold :D

It's been a great, fun, and trying experience getting this thing working well. I'm glad I brought the build log here. :thumbsup:

It's benchtop style from here on out I'd say. I like my computer much better with it out in the open.

Adding 4' of hose to the gpu loop, coiled up in the chiller. Pics & results later. The chiller didn't get very cold last night for some reason...or so it seems looking @ the thermometer.......only ~ -30c:thumbdown:grrrrrrrrrrrr...it was -22 when I went to bed @ 1AM. WTF?

My chiller lost a bit of capacity after a while as well. It could be due to the imense pressure build up in the system taking a toll on the compressor. Turning the unit on while still very cold in the bath can cause this too, but it seems gradual.

Make the most of the deep temps you get now, it may not reach these optimal temps consistently.

Bummer....my chiller is already on it's way out? :thumbdown:

Anyways the 2nd loop I added going through the chiller dropped the gpu temps from the low 30s to the low 20s idle...... which is perfect for them. :thumbsup: I hope it lasts awhile, geez I just got it working.

If it quits working good before I get my new thermometer I'm going to be highly irritated.

It'll be gradual so at least you'll have some fun with it :D

And if it totally fails, I've got the prescription for yah which you'll find is by far more exciting :D

Till then...........Froster the FEVER!
Attachment 3139
Attachment 3140

I have a theory......when the consistency of the coolant turns to slush and the evaporator is all covered in thick slush.....it no longer works very well to cool the coolant.

OR.....the coolant, once it turns to slush cools much slower. Like if you have a freezer full of water bottles....when they freeze up today they will not be as cold as the will tomorrow if left in the freezer. Ice cools slowly.

OR.....my chiller won't take anything below -31 C anymore, when last week it took some coolant down to -45 C. All I have left to thin it with is that jet fuel I got the other day mixed with antifreeze. :thumbdown: I'll try a gallon or so and see if it helps tonights chilling.

EDIT: here is a picture of the slightly chilled gpu loop.