Better Cooling for the 7800GTX - Page 18

I used to have extreme heat issues... as in my GPU would hit 95C. All i do now is blow the ever-living-crap out of my fans with compressed air.. My GPU doesnt go above 82 now, when it used to hit 95. I just make sure i do it 2x a month (house and work are VERY dusty) and im yet to have even a minor issue since..

Dont underestimate dust....its a silent killer

I had the choice of getting 5mm or 7mm copper plates and I decided to go with 7mm (equates to about 0.27559" which I read some people find too thick, but that's just the way it is.)
I like the directly protruding fin design and I'm gonna try and make the bottom ram fins out of one piece with extra fin real estate.

Now, to decrease the down-time for my lappy I would like to know one piece of critical info:

Are all the dimensions of the 6800U the EXACT same as of the 7800GTX?
If so, then I can use my 'old' 6800U for fitting the fins...


I just hope the spacing between the core and the cooler is big enough to take a shim made of this stuff and still have ram contact...

Laptop legs guys http://www.laptopdesk.net/access-legsf.php

hehe

just saw this message, so here's some piczz







My wires are a mess.. didn't feel like cleaning.. and I still can't find my liteon external dvd burner psu, so i removed that.. it sits nice and low next to the couch i sleep on and sit on all the time.. its not beautiful, but it's very practical and suits my needs very nicely

Do you have any pics of where you mounted these? I bought some a while back, but according to the instructions you have to mount each one exactly the same distance from the back and sides of the notebook. On my 9300, the only place that this would work would put one of them right on the wireless mini-pci access cover, and I wasn't real thrilled about that much weight being supported by that little door.
I also bought a lapdesk from the same company, and I've been pretty happy with that.

Not to be outdone by a teenager I modded my GTX the same way

I wasn't truly satisfied witht the fins because I wanted to cut them, leaving a maximum of material for cooling. Unfortunately cutting was no option and I had to Dremel it, biting away at the matarial and sending precious grains of cool copper through the air.

The result isn't half bad for the ram cooling and the shim looked pretty good too.

My idle temps before were around 58 (with rivatuner, 52 with fangui) and now they're about 6 degrees cooler. I just wonder how K6 got such rediculously low temps... either that card was just plain cool or he uses fangui temps I guess.

Anyway, the pics:



You can see the gaps between the fins. Unfortunate but I had no choice.

I was also contemplating increasing the air flow to the GPU fan by cutting into the hidden fan grill.



The top vent is normally covered by the bezel and is therefor out of sight. I think I'll cut it out all together once the warranty expires. Any thoughts?

EDIT:

By the way, what are the chances that two the same heat pipe cooling assembly's have different cooling capabilities?
I mean, could using my 6800U heat pipe assembly potentially yield better cooling results?

Upping the ante are we? You lead, I'll follow.

If it is in the same league as mine, I will have to speed up my peltier version. See if you can beat that

But now for some slightly sad news, for me. Dispite my handywork in modding my 7800GTX with shims and such, the load temps don't seem to drop all that much. Stock cooling did Far Cry at 450/1250 at around 104c... damn hot...

After the modding it gets to 99c and that's only trying it for 5 mins. This severely sucks!
Update: it reached 104c again... damnit!

I do read about people getting into the 80s under load, so it must be possible.
It is doubtfull that letting the AS cure will get me anywhere in that neighbourhood.

If you assume that I know what I'm doing and that the application of the mod is done right, could it be that:
A. my 7800GTX is a hothead pos?
B. my 7800GTX heat pipe assembly has a fault that reduces cooling efficiency? (I still have my 6800U's assembly, should I try that and see?).

Well that put my mind at ease just a bit.
How was that other cooler design different? Was it something you could really see and recognize?
My 6800U cooler looks about the same, but perhaps they made the later (7800GTX) coolers cheaper and therefor less efficient in some way.
I still my try it.

With pulling the shim off the GPU I guess you don't mean your own on-top-of-the-core shim, but the little ring on the outside.
I'm not sure I'd want to do that, crushing cores seems to be something that does happen now and then, but heat having to pass through 3 layers of material before it gets to the heat pipe assembly doesn't exactly help either... Tell me how it goes

If you want to reduce the 7800's heat, even temporarily, you may want to try a simpler and safer approach than reflashing all the time.
Just lower the max multiplier on your CPU with f.i. RMclock!
It wil reduce CPU temps and that will leave more cooling capacity from the air coming off the CPU sink for the GPU sink.
If you lower the multiplier enough you will also get the added effect that the 7800GTX will not have enough CPU time to do it's thing at full speed thereby also creating less heat.
This way you will have at the same heat as with reflashing, a little higher performance.

EDIT:
As far as your taking off the shim, I think I'll beat you to that with a slightly less invasive procedure.
I just take my ol' faithfull Dremel and shave about the same height off of the shim as the core is lower than the shim + a little extra.
This should give me perfect and tight contact without the use of the on-core shim and two layers of greasey crap.
I noted the 6800U's core is not hindered bya shim... so I can't practive on my garbage 6800U.
(cool huh, my 6800U has been degraded to garbage when people here would pay money for it if I just wouldn't kill it )

And while I'm at it: I posted a couple of days ago a site that sold the GPU fans, but they're sold out and have no idea when they'll have it again.
I'm planning a software switching increased fan power mod, but I need an extra fan to try it on!
Anybody can help me out? In any way? (f.e. I can't order it with Dell, europe, they're even bigger asswipes than in the US)

EDIT2:
I meant the peltier cooled lappie cooler, not an internal pletier...

Ok I'll just start another post because the previous one is getting too big.

This Dremeling of the shim is not going to be of any effect because here too, just like on the 6800U, the core is actually higher than the shim!

So Dremeling is out, shims are out too. If contact is iffy I'll have to screw around with the screws to improve pressure.

EDIT:
And here we are back at square 1 again. It seems that the copper inlay of the heat pipe assembly is just about as far receded into the assembly itself as much as the core sticks out. So I'll be grabbing that Dremel first thing in the morning and shaving off some micrometers from the shim, wish me luck!

why dont u just get the copper from onlinemetals.com ?
http://onlinemetals.com/merchant.cfm...ep=2&sortby=od

Thanks for the info, but you seem to miss the point completely.
I already have every size of copper to my avail, I just want to NOT a use copper shim anymore because a shim will result in the heat having to travel through and extra layer of grease and an extra layer of copper before it get's to the cooling assembly. This causes heat resistance and will... oh well, I'm sure you get it.

Is your 7800 like this with copper directly from the core to the pipes?

Well, I guess the men are separated from the boys, I cancelled my Dremeling mission. I too decided, upon holding a very noisy powertool closer and closer to my poor little GPU core, that the vibrations might do more damage than just etching away at the shim.
That and I sobered up from this rep points power hunger trip just in time
I did get the metal dust thing covered though, I too watch E.R.



So I just re-applied a generous amount of AS5 and tightend the screws tighter than ever before and that should be enough... for now.

The lowering of the CPU multi is of course in cases of extremely hot weather or where games just generate too much heat because they use so much of the GPU's functions. Also not all games require the max of the CPU so clocking it down a little will in many cases not hurt performance the slightest.
And if it IS CPU hungry, than still the survival or not-crashing of the lappie has great preference over that extra frame or two.
Flashing is for that way to dangerous and too much work.

I don't think tapping a larger thread will work, the aluminium (yes, not aluminum) is already contacting the shim, more pressure will not put more pressure on the core, only on the shim. Dell measured that pretty darn precisely.

I do have some other ideas. How about this: a DVD bay slotcooler? I have tiny slotcoolers, thinner than usual and they will fit inside a DVD drive bay bracket for an extra hard drive. It could then blow air into the innerds of the lappie, greatly increasing cooling performance at least to the custom made ram coolers and therefor also to the total assembly. Look at this:



It gives a great look directly onto the copper from the drive bay...

Show me the pics!

Oh, and yes, it is the same cooler with the heat pipes and such.