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Helium results!!! Window air con chill box build. - Page 9

post #81 of 118
Thread Starter 
Okay after much toil I've got my final overclock for my aged system.

Got my Q6600 G0 stepping default 2.4 clocked to 3.92Ghz 435 fsb x9 multipler 1.45vcore.....stable in wprime ( not prime95) and more importantly is game benchmark stable, my ram is pants running that at 870mhz 5,5,5,15

Also oc'ed my palit sonic 2X SLI gtx 460 2GB models nvidia reference if 675mhz these come from the factory at 700mhz. Got this up to a whopping 980mhz and the gddr from 1800 to 2000mhz.
Did a bios flash to unlock extra voltage using 1.15v core.

Not stable in furmark burnin but again is gaming benchmark stable.

I've been looping through Metro 2033 frontline benchmark dx11 on the highest settings af x16 aa x4 dof enabled at max monitor res of 1920x1200.......don't think they come much more taxing than that, graphics cards are below 30 deg C and cpu below 20. Also been using cryostasis and hard rest benchmarks.....all stable so I'm hoping will be good for my gaming usage.
post #82 of 118
Techno, software temperature readings really start to fall apartw when you are working with subzero temperatures. With dry ice and liquid nitrogen, using an external temperature sensor is pretty much mandatory.

The only board I've ever used tht displayed temperatures in BIOS correctly was my Gigabyte X58A-UD9. For a thermometer, I use a DT302.

d69b9ee9.jpg

54e7f9c0.jpg
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post #83 of 118
Thread Starter 
Thanks BP,

I won't argue that point.

I've got a cheap temp probe to monitor the chamber temps....It's holding about -22 deg C under full load.

But yeah under zero my cpu and gpu monitoring goes pants.....but I have found ways around it.

I warm the gpu's up using furmark then when warmed up I can start msi afterburner and it will then display temps above zero.

If you start the msi software while the gpu's are below zero then the software does not even display temp readings let alone the value.

With "Core Temp" software I've noted it locks out at 9,5,5,9 when the core go below this. But if you put the cpu under load then it does start registering when above those values.
I understand that coretemp is less accurate at the lower end of the scale.

Tbh I'm not too concerned, I guess that even though in a -22 c chamber if the gpu or cpu temps were to climb higher then the software apps would start registering more accurately.

I'm happy that my components are operating at substantially below normal temps and so long as I can tell they are not overheating I'm not too concerned that I don't have the absolute accurate temp.

Ps I see your heavily into active cooling....what sort of overclock do you think I'd get on ivybridge with a full load temp of +20 to +30 deg c
Edited by technogiant - 7/7/12 at 9:37am
post #84 of 118
I just read the thread from the first post.. sitting outside at 100+f pool in full view of my ipad.
wow... very cool. :>
lots of great info.. congrats on your awesome build!!!!
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post #85 of 118
Thread Starter 
Thanks sunset1, I'm just about done now, just some minor snags to correct...I've been messing with metro 2033 benchmark frontline map.

Here's a screeny after 5 consecutive runs all at the max settings...note the temps...lol

metro25.jpg

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post #86 of 118
OP, have you tried the heatpipes with 3rd party temp measurement tools? your other smart option might be a custom fan profile that keeps them over 0C.
Edited by u3b3rg33k - 7/7/12 at 7:22pm
 
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post #87 of 118
Thread Starter 
Quote:
Originally Posted by u3b3rg33k View Post

OP, have you tried the heatpipes with 3rd party temp measurement tools?

I haven't, this is not a monitoring problem, I watched the temps with a solid heat sink in bios monitoring as the chamber cooled and the temps behaved as expected allowing for the wrapping I explain earlier. The heat pipe heat sink cooled to 8 deg c with a chamber temp of -11deg c then cpu temps started climbing quite rapidly. I use core temp once booted to windows, that showed problems with the heat pipes also.


Quote:
Originally Posted by u3b3rg33k View Post

your other smart option might be a custom fan profile that keeps them over 0C.

That's a great idea that I will give a go....suppose it depend on the cpu producing enough heat at idle to prevent the heat pipes from freezing at the far ends....even with zero fan that may be a tall order at the chamber temps...never seen anyone use a fan profile to keep a cpu warm before..lol...that is thinking outside the box....not sure how how adjustable my bios fan profiles are though...but if I can get it to boot to windows perhaps using a low bios fan speed so it doesn't freeze in the begining I could then use fan control software....can you recommend any?
Edited by technogiant - 7/8/12 at 3:28am
post #88 of 118
Well I use CCC to set my 6950s at a static 60% for 24/7 folding purposes, but I've used MSI afterburner in the past to run custom profiles. For CPU - the only one I can think of off the top of my head is speedfan.
Quote:
Originally Posted by technogiant View Post

Even if my current gpu heat sinks are solid and this is only a monitoring issue with those, there is the question of what I would do about future gpu purchases. Most of them now use vapor chamber heat sinks and I don't think I would be able to get a current gen mid/high power gpu card that didn't have vapor chamber cooling...which I fear would suffer from the same problem
I don't think a vapor chamber would suffer the same problems. with heat pipes, you've got parts of the pipe that are far away from the heat source, and if they're water based, and it freezes at the far end, it takes a lot of heat to thaw it at the other end. with a vapor chamber, that distance problem is eliminated, and the moment you dump heat into it, it just thaws.

I happen to think that since most fan profiles are optimized for silence, it's probably not even a problem, but it's certainly worth trying out.
Edited by u3b3rg33k - 7/8/12 at 1:03pm
 
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post #89 of 118
Thread Starter 
Quote:
Originally Posted by u3b3rg33k View Post

I don't think a vapor chamber would suffer the same problems. with heat pipes, you've got parts of the pipe that are far away from the heat source, and if they're water based, and it freezes at the far end, it takes a lot of heat to thaw it at the other end. with a vapor chamber, that distance problem is eliminated, and the moment you dump heat into it, it just thaws.

You could well be right there, also I'm wondering if the chamber is actually a space or if it is filled with sintered copper, I mean once condensed on the outer plate of the chamber would water really have to track all the way out to the side of the chamber to get back on to the bottom plate...I doubt it...the small chamber gap is probably filled with spongy sintered copper so that the water can go straight back to the bottom plate.

Only way to find out for sure is to try it.
post #90 of 118
Read every page, absolutely interesting project Tech, this is always something I've wanted to mess with and I feel like I can live this dream through you smile.gif lol

Not sure where you're at at this point in your project? Satisfied? Brainstorming improvements? Awaiting the upgrade?

I would love to see how your liquid cooled cpu radiator butted up to the evap would turn out, but if it were me I probably wouldn't see the need to spend the money on it. I also wanted to spitball some things to maybe think about in the future...none of these do I expect to see, just feeding this fire here, as it's exciting to watch. Maybe it will get some of your own thoughts rockin.

-Air Ducts. Fans are currently blowing air all around the case, and the overall case is cooled. What would be results of running an air duct system to take air forced through the evap straight to your components you want to cool?

-With air ducts in mind, what you are doing is really lowering the actively cooled volume of your case. What about fillers, such as just some insulation material in dead space of the box? Less air to cool, would that mean the air would get any cooler? Might be counter productive; again, just brainstorming.

-VRM cooling. What about heatsinks, or even a direct conductive contact from the evap to your VRMs for overclocking stability?

-Evaporator mods- This would require a heavy duty mod, (metal fabrication, brazing, A/C coolant flushing etc) and not sure if you have the ability or desire to do this but...what about designing an evaporator that has more surface area, or a more specific area to cool the way you want it to? Example-instead of a square that looks like a deck of cards, what about an insulated tube with the evap coiled around the interior of it, blowing directly on the cpu?

Great work on the project, and hope to see more from you. +Rep!
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