Ati Mounting Specs?

Gareth · 06-09-2003, 04:54 PM

Im designing my own water block and need to know the mounting specifications for the Radeon 9700 series cards e.g. holes distance apart, mounting pressure, hole size.?

Balinju · 06-09-2003, 05:03 PM

here is what bigben2k told us

Gareth · 06-09-2003, 06:21 PM

Thanks a lot, any body got info on maximum screw girth and mounting pressure?

W1zzard · 06-10-2003, 05:48 AM

the "purple" holes are M3

JSimmons · 06-10-2003, 06:18 AM

Holes look like a #4 to me...

BladeRunner · 06-10-2003, 06:40 AM

Here's some specs I took from 9800, seems the same as the previous 9700. (was mainly info to mill shim avoidance into my block base)

Mounting holes are just a tad smaller than M3 so an M3 screw / bolt would be a tight fit or cut a thread slightly if forced in the hole. On the mounting pressure you'll be limited by card bend if you just use bolts through the holes, (so don't over tighten). To get a decent mounting pressure you need a retainer that presses on the back of the PCB opposite the core. I made one that has a raised centre and used a mica shim to prevent PCB contact / damage. The "copper retainer bar" was bent in a slight "V", so becomes straight, (level), when tightened giving a spring retention effect. This is just an educated guess as to mounting pressure, but is far more than standard push pins give, not that it is of huge importance with VPU heat levels, as long as it is secure enough, it should be fine.

pippin88 · 06-10-2003, 06:53 AM

M3 go through all the cards I have had fine.

BladeRunner · 06-10-2003, 07:29 AM

You may find an M3 screw will go through the hole depending on the screw tolerance, (how well it's made). I was trying some motorsport quality here that were tight. An M3 x .5 tap wont go either without either tapping a slight thread or forcing it, a 2.8mm drill shaft is a nice fit in the hole at least with the cards I have here.

MadDogMe · 06-10-2003, 10:07 AM

I found exactly the same thing on my nvidia cards. The bolt would fit but it was very 'sticky', it had to be twisted in, would'nt push straight through...

ChrioN · 06-10-2003, 10:53 AM

Someone would get all those drawings and get em in a "sticky" thread or something.

OT: Bladerunner: Update your site d00d!

BladeRunner · 06-10-2003, 11:06 AM

Quote:

Originally posted by ChrioN
OT: Bladerunner: Update your site d00d!

I'm doing it now......... Honest

Gareth · 06-10-2003, 02:29 PM

Is the shim really needed?

oh and i found this on the swiftech website: -

Retention mechanism:
NVidia: 4 spring loaded 2-56 S/S socket screws, providing ~20 lbs of pressure overall
ATI: 2 spring loaded 4-40 S/S socket screws, providing ~15 lbs of pressure overall

bigben2k · 06-10-2003, 02:57 PM

FWIW.

A 2-56 screw has a diameter (at the threaded section) of 0.086", aka 2.2 mm, where an M3 has a diameter of (course!) 3.0 mm.

Seems like Swiftech's playing it safe, and specifying a screw that will fit all.

06-09-2003, 04:54 PM	#1
Gareth Cooling Neophyte Join Date: Jun 2003 Location: Somerset, UK Posts: 13	Ati Mounting Specs? Im designing my own water block and need to know the mounting specifications for the Radeon 9700 series cards e.g. holes distance apart, mounting pressure, hole size.?

06-10-2003, 06:18 AM	#5
JSimmons Cooling Savant Join Date: Apr 2003 Location: 4-sided room with an exit going east, and an exit going south Posts: 392	Holes look like a #4 to me... __________________ My Watercooling Stuff

06-10-2003, 06:40 AM	#6
BladeRunner Cooling Savant Join Date: Jul 2001 Location: Chesterfield Uk Posts: 459	Here's some specs I took from 9800, seems the same as the previous 9700. (was mainly info to mill shim avoidance into my block base) Mounting holes are just a tad smaller than M3 so an M3 screw / bolt would be a tight fit or cut a thread slightly if forced in the hole. On the mounting pressure you'll be limited by card bend if you just use bolts through the holes, (so don't over tighten). To get a decent mounting pressure you need a retainer that presses on the back of the PCB opposite the core. I made one that has a raised centre and used a mica shim to prevent PCB contact / damage. The "copper retainer bar" was bent in a slight "V", so becomes straight, (level), when tightened giving a spring retention effect. This is just an educated guess as to mounting pressure, but is far more than standard push pins give, not that it is of huge importance with VPU heat levels, as long as it is secure enough, it should be fine. __________________ Zero Fan Zone

06-10-2003, 07:29 AM	#8
BladeRunner Cooling Savant Join Date: Jul 2001 Location: Chesterfield Uk Posts: 459	You may find an M3 screw will go through the hole depending on the screw tolerance, (how well it's made). I was trying some motorsport quality here that were tight. An M3 x .5 tap wont go either without either tapping a slight thread or forcing it, a 2.8mm drill shaft is a nice fit in the hole at least with the cards I have here. __________________ Zero Fan Zone

06-10-2003, 02:57 PM	#13
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	FWIW. A 2-56 screw has a diameter (at the threaded section) of 0.086", aka 2.2 mm, where an M3 has a diameter of (course!) 3.0 mm. Seems like Swiftech's playing it safe, and specifying a screw that will fit all. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

06-09-2003, 06:21 PM	#3
Gareth Cooling Neophyte Join Date: Jun 2003 Location: Somerset, UK Posts: 13	Thanks a lot, any body got info on maximum screw girth and mounting pressure?

06-10-2003, 05:48 AM	#4
W1zzard Cooling Neophyte Join Date: Sep 2002 Location: Stuttgart, Germany Posts: 25	the "purple" holes are M3

06-10-2003, 06:53 AM	#7
pippin88 Cooling Savant Join Date: Oct 2002 Location: Australia Posts: 285	M3 go through all the cards I have had fine.

06-10-2003, 10:07 AM	#9
MadDogMe Thermophile Join Date: Aug 2002 Location: Just shut up ;) ... Posts: 1,068	I found exactly the same thing on my nvidia cards. The bolt would fit but it was very 'sticky', it had to be twisted in, would'nt push straight through...

06-10-2003, 10:53 AM	#10
ChrioN Cooling Savant Join Date: Sep 2002 Location: Sweden Posts: 318	Someone would get all those drawings and get em in a "sticky" thread or something. OT: Bladerunner: Update your site d00d!

06-10-2003, 02:29 PM	#12
Gareth Cooling Neophyte Join Date: Jun 2003 Location: Somerset, UK Posts: 13	Is the shim really needed? oh and i found this on the swiftech website: - Retention mechanism: NVidia: 4 spring loaded 2-56 S/S socket screws, providing ~20 lbs of pressure overall ATI: 2 spring loaded 4-40 S/S socket screws, providing ~15 lbs of pressure overall

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