The anatomy of a 'bow'.

[Merc14]

nikhsub1
Thanks much for the great photos and in depth analysis. It is VERY much appreciated and well done mate.

[dinos22]

Ya, I realize that there is only one way to install the top...

However, when I tighten the screws, I can get a bow in two directions, can't I?

Screw pattern:
TL-----------TR
BL-----------BR

Scenario A:
I tighten down TL-BR-TR-BL.... I get a bow going from where to where?

Scenario B:
I tighten TL, BL, TR, BR - bow from left to right

Scenario C:
I tighten TL, TR, BL, BR - bow from top to bottom....

So, which one? Or have I got something wrong?

good point

i am yet to do mine and that is a good question

maybe someone can address it before i do mine lol

[D_o_S]

Still looking for a reply to my question...

[sick_g4m3r]

I think you tighten the screws all the same. That way it creates the most equal bow that will have the greatest effect.

[dinos22]

Still looking for a reply to my question...

I think you tighten the screws all the same. That way it creates the most equal bow that will have the greatest effect.

that's what i did

quarter of a turn each until i could not tighten any more



APOGEE BOWED

[Angry_Steel]

Obviously it works, but it just looks and feels wrong on so many levels....

[nealh]

Obviously it works, but it just looks and feels wrong on so many levels....

looks like it should leak, IMHO

[dinos22]

don't jinx me dude

[MetalZone]

looks like it should leak, IMHO

It won't leak. The O-ring seal is now tighter than ever.

Here's how I did it:
http://www.pcmoddingmy.com/e107_plug...?content.408.3

With the Apogee GT (not GTX) I think it makes absolutely no difference which way you attempt to bow the direction to. The side with the mounting plate sticking out will have a larger bow than the side without because the mounting plate in that direction is stronger. The mounting plate side parallel to the barbs (the side with no mounting plate edge sticking out) will have a lesser bow because the mounting plate actually bows in the opposite direction of the baseplate bow, thus lessening the actual bow of the base plate in that particular direction. The acetal top will also bow in the opposite direction following the mounting plate on top.

The Apogee GTX i believe 'might' have a more even bow though, because the top is solid aluminium and its strength is more evenly distributed in both bowing directions. Still then, the drawback of the LGA775 socket retaining design still creates some degree of IHS deformation which may affect the end result of how the bowed baseplate is mated to the IHS.

[nealh]

don't jinx me dude

Sorry

I realize the nice think O-ring will prevent leaks...

[cdelong]

I tried the EK o-ring on my FuZion..... SWEET!! Dropped me a good 3-4C right on rebooting. Ceramique is not even cured yet!!

[sick_g4m3r]

EK O-ring on top of the inlet of the fuzion, right??

3-4C is amazing!!! Is your CPU lapped?

[the highlander]

will bowing work for the q6600 in the same fashion?

[[XC] DragonOrta]

EK O-ring on top of the inlet of the fuzion, right??

3-4C is amazing!!! Is your CPU lapped?

Probably between the top of the the block and the base, to give it more of a bow.

[dinos22]

that's what i did

quarter of a turn each until i could not tighten any more



APOGEE BOWED

well no leaks to report and performing very well

in the loop i have GTS240, DDC2, Microres, Apogee, MCW60, 3/8" tubing..........chugging away at 3.8GHz with E6700 with 1.43V and GFX card not breaking a sweat past 43C .....max core OC added only a single degree to the GPU >> 44C max temp
CPU ~62C (i have a hot LxxxBxxx stepping)

http://i4memory.com/showthread.php?t=4090

[sick_g4m3r]

well no leaks to report and performing very well

in the loop i have GTS240, DDC2, Microres, Apogee, MCW60, 3/8" tubing..........chugging away at 3.8GHz with E6700 with 1.43V and GFX card not breaking a sweat past 43C .....max core OC added only a single degree to the CPU >> 44C max temp

http://i4memory.com/showthread.php?t=4090

Your CPU is loading at 44C???? With a GFX card and an E6700 both on a GTS240??? Holy smokes, bowing must do wonders!!!

[silverphoenix]

Just a question for a GTX what diameter O-ring does one need? I see alot of people saying go to HD to get one but I don't know the size and rather not tear apart my whole setup and bring my O-ring to find they don't have it at my HD.

[Tulatin]

Take a look at this as to how far apart the dies are from each other.


http://www.overclock.net/2104912-post78.html

And an actual image:


http://www.overclock.net/2101989-post50.html

With photos and links like that, the design of the new AC "flow killer" makes sense. Now, i know a lot of you guys see 1/4" or "small bore" cooling as , but think about it - a correctly mounted block shoots cold water (okay, sorta cold after chamber one) DIRECTLY onto each core, thus making it (theoretically) superior to any other competitor.

I suppose the idea of having an exact "contact area" - that being the entire base of the core milled out bar a small strip/square (C2Q/C2D respective) would provide the best force, but be off by a few MM, and you face failure.

So is the general consensus that bowing simply boosts performance by boosting pressure?

[dinos22]

Your CPU is loading at 44C???? With a GFX card and an E6700 both on a GTS240??? Holy smokes, bowing must do wonders!!!

GPU i meant to say there of course

you can always look at the link i provided

[dinos22]

here is my post at i4memory for the lazy ones and if i back down to 3.6 1.32v and stess both GPU and CPU i get roughly the same loaded temps ~43-45C on BOTH CPU and GPU but if i only load the CPU and quick GFX stress program i get a true CPU stress temp which is another 5C higher or thereabouts







ok so i tested both GPU and CPU now and i am more than impressed.........look at the temps on the GPU


3.6Ghz 1.32V
8800GTS 320M stock clocks


CPU on its own another 5C on top


650MHz on CORE




3DMARK06 TEMPS



compare those to my air cooled results

AIR RESULTS

if ambient temps were linear according to that ambient sensor on the GFX card there would be something like 30C drop in load temps between air and water


another thing i couldn't do with Nautilus 500

3.8GHz 1.43v loaded smallFFT 1 Hour Stable
20C ambient with 8800GTS 100+Watt GFX in the loop
closed case
i will try 1.41v....should be able to do it

[zhangmaster12]

my e6600 already has a convex IHS, will bowing my fuzion be necessary? will it give me better temps? Out of Bowed, unblowed fuzion or bowed, unbowed Apeogee GT, which would give me the best temps?

[cdelong]

EK O-ring on top of the inlet of the fuzion, right??

3-4C is amazing!!! Is your CPU lapped?

Yes, EK O-ring on the top inlet...... IHS is lapped down to 1500 grit with w/d paper. It's not a mirror finish, but it doesn't need to be. It just needs to be flat

Idle is now 34-35C on both cores... down from 37-39C. Ambient is 75-76F. I'll do some more load testing in a few days, but after 9 hours of dual Orthos she was running at 54C-55C (coretemp & Intel TAT) on both cores w/ 1.41v.

[cdelong]

Probably between the top of the the block and the base, to give it more of a bow.

You can't have the O-ring against the base directly. It will be interfering with flow through the pins. It must go between the inlet plate and the mid plate. The bow will transfer through the mid plate to the base.

[AMDfreak]

OK, so I'm running a MP-05 LE right now. I have a G0 q6600 on pre-order. Were you in my shoes, would you change over to one of the 3 "bowable" WB's?

[nikhsub1]

OK, so I'm running a MP-05 LE right now. I have a G0 q6600 on pre-order. Were you in my shoes, would you change over to one of the 3 "bowable" WB's?

Unless you want to run ~5C hotter with the MP-05 LE for some strange reason