7800GTX Cooling Mod

**damstr** · 10-09-2005, 06:01 PM

Originally Posted by Entropy1982

Ok... newbie alert

I want to ziptie the fan onto the heatsink of my BFG 7800GTX OC
Do i have the right idea?

http://i13.photobucket.com/albums/a2...82/topdown.gif
http://i13.photobucket.com/albums/a2...y1982/side.gif

I know i know.... i'm sorry

this is what i did:

**chinkgai** · 10-10-2005, 02:44 AM

Originally Posted by Entropy1982

Ok... newbie alert

I want to ziptie the fan onto the heatsink of my BFG 7800GTX OC
Do i have the right idea?

http://i13.photobucket.com/albums/a2...82/topdown.gif
http://i13.photobucket.com/albums/a2...y1982/side.gif

I know i know.... i'm sorry

ROFL @ UR PICS

all i did was use two cuz one wasnt long enough...so loop one zip tie through the other zip tip so now its 2x as long! if you cant picture it, then picture a belt...use the end of one belt to connect it to the buckle of the other belt..

now that its long enough, just do a complete wraparound, rather than try to fit it through the holes

if two looped through eachother isnt long enough, go three, or four...etc

**Entropy1982** · 10-10-2005, 03:26 AM

Originally Posted by chinkgai

ROFL @ UR PICS

all i did was use two cuz one wasnt long enough...so loop one zip tie through the other zip tip so now its 2x as long! if you cant picture it, then picture a belt...use the end of one belt to connect it to the buckle of the other belt..

now that its long enough, just do a complete wraparound, rather than try to fit it through the holes

if two looped through eachother isnt long enough, go three, or four...etc

haha... what about the spacers... i saw someone put em on... do i need spacers?

**davidian** · 10-10-2005, 07:14 AM

Can I use Zalman VF-700 for cooling GF 7800GT. Will it be compatible?

**EZClock** · 10-10-2005, 09:01 AM

I did the exact same mod on my 7800, upped my clocks around 10mhz on the core / 20mhz on the ram (Dual 80mm fans double stick taped together hovering over the gpu hsf / ram). Gave me a decent drop in temps. That shouldn't compare to a VF700 though

.

**chinkgai** · 10-10-2005, 02:41 PM

Originally Posted by Entropy1982

haha... what about the spacers... i saw someone put em on... do i need spacers?

you could, but you dont have to...experiment

**Frank Horrigan** · 10-12-2005, 03:59 AM

Hi, im getting a 7800 ultra when they come out.. for my new pc. Anyway this seems like the coolest mod i've ever seen lol.

So hopefully a 7800 ultra doesn't look too driffrent from this and I can just strap a 80mm fan on there...

but what cfm would you recomend? is 20 enough? or shoud I get a more powerfull fan that does around 30-35 and also.. is it a good idea to put these on a fan controler?

also has anyone tried having the fan at like a 45 degree angle? to like pull air from the pci slots, or vica versa?

thanks

**Entropy1982** · 10-12-2005, 07:27 AM

Originally Posted by Frank Horrigan

Hi, im getting a 7800 ultra when they come out.. for my new pc. Anyway this seems like the coolest mod i've ever seen lol.

So hopefully a 7800 ultra doesn't look too driffrent from this and I can just strap a 80mm fan on there...

but what cfm would you recomend? is 20 enough? or shoud I get a more powerfull fan that does around 30-35 and also.. is it a good idea to put these on a fan controler?

also has anyone tried having the fan at like a 45 degree angle? to like pull air from the pci slots, or vica versa?

thanks

lets not get out of hand now :P

**aldamon** · 10-12-2005, 08:44 AM

I see a lot of reports of temperature drops but not many reports of better overclocking with 7800GT. Is the 7800GT core the same as the 6800GT in that it's designed to run pretty hot? I water cooled my old 6800GT and got nothing out of it. I'm not going to bother with this mod if it won't increase the overclock.

**rick_fx** · 10-12-2005, 09:22 AM

Originally Posted by aldamon

I see a lot of reports of temperature drops but not many reports of better overclocking with 7800GT. Is the 7800GT core the same as the 6800GT in that it's designed to run pretty hot? I water cooled my old 6800GT and got nothing out of it. I'm not going to bother with this mod if it won't increase the overclock.

It wont increase the overclock, the card will just run cooler. To get higher clocks, you need to do a volt mod.

**Entropy1982** · 10-12-2005, 11:14 AM

Originally Posted by rick_fx

It wont increase the overclock, the card will just run cooler. To get higher clocks, you need to do a volt mod.

is it me or do half the people that do a volt mod mess up their card? hehe

**aldamon** · 10-12-2005, 11:46 AM

Originally Posted by rick_fx

It wont increase the overclock, the card will just run cooler. To get higher clocks, you need to do a volt mod.

Then I guess I will skip this mod.

**kamongear** · 10-13-2005, 12:01 PM

Nice mod! Good work!

**infiniti029** · 10-13-2005, 03:39 PM

Originally Posted by Frank Horrigan

Hi, im getting a 7800 ultra when they come out.. for my new pc. Anyway this seems like the coolest mod i've ever seen lol

I believe the Ultra got cancelled. Read it on some hardware sites last week.

**guess2098** · 10-13-2005, 07:24 PM

man, u guys did a good job on 7800GTX air cooling.... i am still waiting for my mod 7800GTX back from CaTalyst.X..... it has been there for 1+ month.........

**omga14** · 10-15-2005, 08:50 PM

had this mod done on my now defunct 6800GT a while back. lowered temps real nice for me. right now i have 2 80mm's in a bracket the CM Stacker provides set up to blow air down onto the 7800gt i'm waiting on. before the comments come rolling in please be kind to my MX420 that's in the pic

**Entropy1982** · 10-20-2005, 02:54 AM

Hey guys.... this is just an initial test with my p180 not closed and the fan blowing away from the HS. I only know my idle temp for now (48C) .... a lot higher than most of you with this mod. Should my fan be blowing AT the heatsink or AWAY from it?

Thanks

**sluflyer06** · 10-20-2005, 09:14 AM

AT the heatsink. Also, do your fan have decent flow?

**Entropy1982** · 10-20-2005, 09:27 AM

Originally Posted by sluflyer06

AT the heatsink. Also, do your fan have decent flow?

it's a panaflo... the one everyone recommends

**Entropy1982** · 10-22-2005, 12:55 PM

so i'm trying to run 3dmark 05 (free edition) ... it goes thruough 2 of the tests and when it opens up the third one it just says a problem occured and the program shuts down.

Also my idle temps are 59C and it was 76C after those 2 tests.

What is going on here

ps. I tried this mod... for some reason it didn't help me, no idea why

**aldamon** · 10-24-2005, 07:29 AM

Originally Posted by aldamon

Then I guess I will skip this mod.

Well, I lied. Can't resist this kind of thing. LOL.

Originally Posted by IceMole

Has anyone tried this on a 7800GT? Well I did tonight. After finding out I had to remove the entire heatsink to get to the 6 screws under it, I released the cover. The fins are bent over so I screwed the fan into the little notches in the fins along with some rubber spacers.

My eVGA had bent fins as well, so while watching my Brownies suck again, I took needle-nose pliers and straightened all of the fins out. Then I attached the fan from my spare AMD cooler and let er rip. I also upped the VGPU voltage to 1.51V. I think that should be fine with this mod in place. The temps are a lot better.

The bad news? Well, eVGA attached the wires from the stock fan to the side of the plastic cover with glue. Being stupid, I pulled them off with too much force and stripped their plastic covering. Then even more stupidly, I forgot to put electric tape on the wires before trying the card with the mod. End result? The capacitor that handles the fan voltage burst into flames. LOL. The card's fine but I won't be using that fan header again. The capacitor has been vaporized.

After this development, I might have to invest in a Zalman HSF just so it has some resale value in the future. This mod isn't very attractive.

**SirSmokeALot** · 11-06-2005, 05:46 AM

haha, try beeing more carefull next time you go ahead and mod something

for those who are carefull with their expensive hardware, this mod rocks. lower temps=

**j0sh4tran** · 02-27-2006, 05:51 AM

Do you guys have any tips on removing the video card? And also, where do you zip the ties again? Pictures please if you have them. Thanks Also, do you guys remove the old power plug from the stock fan?

**sluflyer06** · 02-27-2006, 10:36 AM

Originally Posted by aldamon

Well, I lied. Can't resist this kind of thing. LOL.

My eVGA had bent fins as well, so while watching my Brownies suck again, I took needle-nose pliers and straightened all of the fins out. Then I attached the fan from my spare AMD cooler and let er rip. I also upped the VGPU voltage to 1.51V. I think that should be fine with this mod in place. The temps are a lot better.

The bad news? Well, eVGA attached the wires from the stock fan to the side of the plastic cover with glue. Being stupid, I pulled them off with too much force and stripped their plastic covering. Then even more stupidly, I forgot to put electric tape on the wires before trying the card with the mod. End result? The capacitor that handles the fan voltage burst into flames. LOL. The card's fine but I won't be using that fan header again. The capacitor has been vaporized.

After this development, I might have to invest in a Zalman HSF just so it has some resale value in the future. This mod isn't very attractive.

The mod is for the GTX which has the screws for the plastic cover on the top of the card and does not require the removal of the HSF...sorry to hear about your trouble but its no fault of the mod that damaged your card.

**j0sh4tran** · 03-02-2006, 06:06 PM

how do u take off the plastic cover?? I have a eVGA 7800gt 515 and its like impossible to take off. and the fan plug is relaly hard to get out too

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