Best cooling mods for Xenon?

[sandungas]

Just one comment with this thermodynamics

Is important the fact that the extra GPU heatsink is not inside the air tunnel, so in the original position is not having the full airflow over it
And in the original position, the CPU is being overheated by it
For sure that if you move it inside the air tunnel, will be overheated by the CPU, but it will have more airflow (hot, but more)

So... thinking about it more deeply... im not sure about the result temperatures of original position vs inside air tunnel


----------------------
Just an idea...
Somedoby tried to fit thermal pads between GPU & CPU ?
There is a little area between then, maybe this works to stabilize temperatures (a bit) between CPU<--->GPU

[Gazcoigne]

im telling you now there is no way that the heatsink has any benefit in the new position regardless of air flow.

the difference in temperature of locations far outweighs the extra airflow which in fact is very minimal if any at all.

in fact there is more air flowing over the GPU extra heatsink in the original position than in the new one so your argument is invalid.

you own diagrams and pictures you post quite often also contradict your statement. the maximum air flow happens through the CPU not the GPU, your own diagrams prove that.

do the maths and see. a 15 degree difference in temps has a factor of 15 in the sums, the airflow difference would never be as much as 15 kg/s you will find the airflow is a very small amount less than 1kg/s for the whole lot.

the laws of thermodynamics do not lie!!

dont try to argue with something you have no understanding of.

accept the mod is not what you all expect it to be it will not cool your GPU any more in fact it will reduce the cooling.

also the 'liquid' you mention in the heatpipe is not a liquid its a fluid which can apply to a liquid or gas, and you will find that there is an inert gas inside the heatpipe, not a liquid.

i may not know the inside out of electronics but you can bet i know all there is to know about this topic.

also to HB for the airflow to pass through the fan it would have to push the fan faster, using energy, and believe me the air will leak out an unobstructed path long before it puts energy into the fan.

[RimbaldoTeobaldo]

im telling you now there is no way that the heatsink has any benefit in the new position regardless of air flow.

the difference in temperature of locations far outweighs the extra airflow which in fact is very minimal if any at all.

in fact there is more air flowing over the GPU extra heatsink in the original position than in the new one so your argument is invalid.

you own diagrams and pictures you post quite often also contradict your statement. the maximum air flow happens through the CPU not the GPU, your own diagrams prove that.

do the maths and see. a 15 degree difference in temps has a factor of 15 in the sums, the airflow difference would never be as much as 15 kg/s you will find the airflow is a very small amount less than 1kg/s for the whole lot.

the laws of thermodynamics do not lie!!

dont try to argue with something you have no understanding of.

accept the mod is not what you all expect it to be it will not cool your GPU any more in fact it will reduce the cooling.

also the 'liquid' you mention in the heatpipe is not a liquid its a fluid which can apply to a liquid or gas, and you will find that there is an inert gas inside the heatpipe, not a liquid.

i may not know the inside out of electronics but you can bet i know all there is to know about this topic.

also to HB for the airflow to pass through the fan it would have to push the fan faster, using energy, and believe me the air will leak out an unobstructed path long before it puts energy into the fan.

I understand... makes sense....

But what if the new heatsink is kept on the original position, and if we add a new fan, in the lateral-front-left side of the XBOX (close to the new ssmaller sink), pulling air from the ouside, running at the same speed and the same speed control the XBOX does with the 2 back fans (don´t know if it´s possible...)? And using some kind of homemade shroud to "assure" the fresh air from the outside comes directly to the GPU and CPU? This air leaks wouldn´t occur (at least not a lot) because all the fans would be running at the same speed, so the amount of air pulled from the front and pushed at the back would be kind of the same....  Wouldn´t this help to reduce the temps inside, by always having fresh air passing through the heatsinks?

Just a very newbie thought though...

[HB]

also to HB for the airflow to pass through the fan it would have to push the fan faster, using energy, and believe me the air will leak out an unobstructed path long before it puts energy into the fan.

The airflow through the fan does not "push the fan faster," rather it lowers the angle-of-attack of each blade, which lowers the drag on the blade.  Because the drag is lowered, the fan can spin slightly faster.  The overall effect is that the effective flow-rate through the fan will be higher.

One can also look at it from the perspective that a fan, given a certain power input (5volts at some current) and efficiency, can do a certain amount of work to the air (deltaPressure*Volume is work if I recall correctly - volume is assumed to be constant given such low pressure changes).  You get a step in pressure from the inflow side to the outflow side, and this step is roughly the same whether the input pressure is ambient or some slightly elevated pressure.  A higher outflow-side pressure relative to the ambient atmosphere necessarily leads to a higher output flow.

You are probably correct that more (likely even most) of the air leaks out via the unobstructed pathes (through the side-vents, etc) - all I am saying is that some fraction of the air will "leak" out of the duct and through the fan, which means that it had to have crossed the heat-sinks.  Air is an equal-opportunity "leaker."

But either way, I do agree that temperature differential is more important in this application, and that cooler air trumps higher flow.

EDIT: Let me qualify this argument by saying I am basing it on adding a fan to the otherwise stock cooling system.  IE, cut a hole in the top or side of the case and add a fan blowing into the case, but leaving the heat-sinks and the plastic duct in place.  I am not referring to the modified heat-sink orientation that some of the pictures show.  Without any ducting inside, you are indeed likely lowering the amount of air flowing over the heat-sink fins, because yes - air prefers the path of least resistance, which in that case would be around the heat-sinks, rather than through.

[Gazcoigne]

i agree that adding an extra fan would be a much better idea than moving the heatsink.

removing the shroud is even worse i had not realised that it had been done in that mod i assumed it had been altered.

tbh the best cooling mod is to opearte the xbox in a clean room in the open, not inside a cabinet or in a kitchen drawer (yes kitchen drawer!! i know a guy who does this)

m$ have invested pretty heavily in their flawed design and tbh i think its the best of a bad situation

do xclamp mod, stick a whisper fan in and be done with it. thats all i do for mine.

[zillionare]

The proof is in the pudding!

I will taste it later whilst testing.

zil

[Gazcoigne]

look forward to seeing your results agree with the laws of physics!

seriously if you think you have a special xbox that defies the laws of science id love some of what you are smoking!!

[NinjaAndry]

Some values from XEXmenu temp
My Xbox it's a Xenon (not my first one,came back from repair with new gpu heatsink)
Modifications are:
1)arctic 5 on gpu,cpu
2)rubberpads on ram (4 underside by M$,4upside with my own pads from other console,2 of them directly under the gpu heatsink for best conduct heat instead of air,other 2 on the remaining ram)
3)close the airduct with tape (the same black one i use to protect mainboard when use air desolder)
4)XCM fans
5)X-clamp from the first day it came back
6)Lowered one of the screw base,it's the one in front of fans,this one is higher than others and you can see the board flex when putted inside (one of the reasons about warping)

Well,after 30mins idle in Xexmenu
CPU 57C°,GPU 61C°,EDRAM 63C°,MB 30C°
Those are higher than expected (for me)..even considering the console is open,without the upper case

To do
1)Check them with closed case
2)Check them after gaming (open/closed case)
3)Check them after finish mount fan on the upper case,directly on the GPU new heatsink and "reconstruct"
a new front air tunnel (that's why I've my xbox open)

Man..I really hate this situation )

[RimbaldoTeobaldo]

I really look forward to your results.... My new heatsink for my Xenon arrives next week... Depending on your results.... I think I'll have to drill a big hole on th top of the box and install a big fan directly over the GPU and CPU.....

[jelle2503]

put your reports here please
http://www.xboxhacker.org/index.php?topic=13784

[bonzo pl]

Why? Cu kontakt procesor?

 

water X/clap M$ Torx ?

[jimmy2x2x]

Why? Cu kontakt procesor?

 

water X/clap M$ Torx ?

What does this mean?

[Akira2007]

soon my xenon will be modded like that:


didnt find a sketchup model for the standard fan shroud, so just imagine it being there


planned is:
removal of dvd drive (thx to jtag)

top fans blow in and will be Arctic Cooling F8 Pro


rear fans suck out and will be Arctic Cooling F8


new heatpaste for gpu/cpu
xclamp-fix
optimize fanduct/airflow inside

make it cool and silent
at the moment i have idle temps of 75°C to 80°C
and even in idle the noise is really annoying, i think because the fan bearings are worn out


will then post pics of wip and final mod

[sandungas]

soon my xenon will be modded like that:
xclamp-fix

This is not needed at all if you solve the heat problem (and not needed if your mobo is flat)
But i suggest you to replace the black pivot of the xclamp by something like this to align opposite forces (i used a plumber O-ring)
http://www.xboxhacker.org/index.php?topic=12895.msg87646#msg87646

[wes11ph]

what are the best cooling mods for xenon?

 like the one posted by akira?

[d4m4n]

soon my xenon will be modded like that:

Looks like you won't fit a DVD drive inside that?
Then you have space to replace the GPU cooler with a CPU cooler. It would cool the GPU much better. Just buy a second hand xbox360 CPU cooler.
Also you can place small coolers on the top side RAM chips, ANA/HANA chip and the southbridge chip.

[duggyuk]

soon my xenon will be modded like that:

Looks like you won't fit a DVD drive inside that?
Then you have space to replace the GPU cooler with a CPU cooler. It would cool the GPU much better. Just buy a second hand xbox360 CPU cooler.
Also you can place small coolers on the top side RAM chips, ANA/HANA chip and the southbridge chip.

i was thinking about doing just that, but what about the messed up profile and the fact that the shroud will no longer work?, if you turn the heatsink around to cover all the GPU then it gets more complicated still

[d4m4n]

soon my xenon will be modded like that:

Looks like you won't fit a DVD drive inside that?
Then you have space to replace the GPU cooler with a CPU cooler. It would cool the GPU much better. Just buy a second hand xbox360 CPU cooler.
Also you can place small coolers on the top side RAM chips, ANA/HANA chip and the southbridge chip.

i was thinking about doing just that, but what about the messed up profile and the fact that the shroud will no longer work?, if you turn the heatsink around to cover all the GPU then it gets more complicated still

In Akiras' desing you need to build shrouds anyway. If you have the skills to do the mod then it's no problem to make a custom shroud or modify the old one.

What do you mean by "turn the heatsink around to cover all the GPU"?

[wes11ph]

i can do akira's mod,  the only problem is where will i put my drive?

if there's a good way to mount on the top of the box the drive. i will put another cpu heatsink on the GPU and put two fans on it.

[duggyuk]

soon my xenon will be modded like that:

Looks like you won't fit a DVD drive inside that?
Then you have space to replace the GPU cooler with a CPU cooler. It would cool the GPU much better. Just buy a second hand xbox360 CPU cooler.
Also you can place small coolers on the top side RAM chips, ANA/HANA chip and the southbridge chip.

i was thinking about doing just that, but what about the messed up profile and the fact that the shroud will no longer work?, if you turn the heatsink around to cover all the GPU then it gets more complicated still

In Akiras' desing you need to build shrouds anyway. If you have the skills to do the mod then it's no problem to make a custom shroud or modify the old one.

What do you mean by "turn the heatsink around to cover all the GPU"?

The old copper CPU heatsink does not cover all the GPU chip, you need to rotate it 90 IIRC.

edit:

I see the solution here