apogee xt - IHS removed?

[chinkgai]

i've been out of the game for a long time now and now im rusty with all these new blocks. got a quick question though. if i remove the IHS on an i7 1366 and removed the mounting bracket on the motherboard, will the block have enough force/pressure on the naked cpu?

[Movieman]

i've been out of the game for a long time now and now im rusty with all these new blocks. got a quick question though. if i remove the IHS on an i7 1366 and removed the mounting bracket on the motherboard, will the block have enough force/pressure on the naked cpu?

I wouldn't do this..JMHO

[chinkgai]

thanks for the advice, but do you know the answer to my question?

[Alexandr0s]

Just exactly why do you want to have that much force on your CPU? The XT is a great block with very good cooling capacities. I doubt squeezing it tightly on the CPU will improve temperatures.

[Conumdrum]

When the block first came out there were some issues with enough force. Gabe adjusted for that. If he adjusted for a bare CPU, dunno. If I was you, I'd still use the plate, and maybe have some alterernate screws ready to mount it. Your talking a lot fo force and the Mobo will bend a lot.

[chinkgai]

no no, i dont need an excess amount of force. my question was that whether or not it would work with a naked cpu at all; meaning would it make enough contact. sounds like it would and if not, i might need to buy some different screws

[eth0s]

Try it and find out. I doubt you will get a definitive answer, since it looks like nobody else has tried it.

[Captain_Harlock]

The XT's mounting system is pre-set at a certain height. There are groves cut into each of the scerws and a "C" clip is placed into the grove to give equal pressure, every time you do a mount. The only way you will get an XT to correctly mount will be to add a couple of washers (you will have to figure that one out on your own) to the tops of each spring and the "C" clip. If you really must remove the IHS, then consider a block that is eaiser to to alter the mounting hardware on. While the XT mount is really good, it is harder to alter than more traditional block mounts that use individual screws and springs.

Also, todays current AMD and Intel CPU's have really worked out the kinks involved with IHS's. The alloy used to solder/braze the IHS to the core tops has great thermal conductivity, and mechanical strength. Its much harder to remove an IHS now becuase of the mechanical strength. Also, the IHS's are consistently flatter than they used to be since the process of attaching the IHS to the core tops has really improved. Most people that have removed the IHS on 1366 chips have shown now change in temps or less than a degree. IMHO, its simply not worth the time, effort, and risk involved since there is really no net gain. But if you do pop the top, then post pics and let us know the details of your before and after work. Good luck on whatever you decide.

[MpG]

I know there was an issue with Swiftech's GTZ during some testing, as (apparently) even lapping the CPU was enough to alter the spring pressure enough to affect mounting pressure. Since hte XT using the same basic mounting design, you'd have to think that removing the IHS entirely wouldn't be a good thing.

That aside, the IHS acts to spread the heat out so that there's a larger contact area between the block and CPU that's hot, and thus conducts heat. IIRC, even back with the Core 2's, removing the IHS wasn't showing the hoped improvements.

[Irocing]

no no, i dont need an excess amount of force. my question was that whether or not it would work with a naked cpu at all; meaning would it make enough contact. sounds like it would and if not, i might need to buy some different screws

Hi,

Running a XT also and had wondered about the effects if the spacing
cut down to lapping would impact pressure on the CPU.

Guessing maybe .001-.003 removal as mine down to solid copper
and mirror finish.

I over think things from time to time, But Hey
Kind of wondering about the shim effect on pressure.
1c difference if problem, not worth the trouble,3-5c, oh yea.

Question to EK might be worth it.

Will follow this as to pratical effects and help if any

Later

[BeepBeep2]

will the block have enough force/pressure on the naked cpu?

More like too much.

If you go with a naked die, the mounting pressure is likely to crack it.

[Captain_Harlock]

More like too much.

If you go with a naked die, the mounting pressure is likely to crack it.

Not at all. The problem with the XT is its mounting system is designed be run with the height that the IHS provides. By removing the IHS, there will be a fairly large gap. That is why he would have to alter the socket area to get the block closer to the cores. But even then, he would need to add some spacers to the mounting springs to get enough pressure for a secure mount. Thats when he could over do it and create to much pressure and crack an exposed core. Trial and error as we dont know how much is two much when it comes to pressure on 1366 cores. And working with the XT's mounting system is harder than other blocks when it comes to modding. But then again, it wasnt designed with exposed cores in mind.

[ScottALot]

CPUs as a bare chip are flat, right? So lap it and it should make contact. It doesn't seem worth it, though... a lot of trouble for something so risky.

[Captain_Harlock]

lapping an exposed core is a pretty risky thing to do and would only increase the gap that much more. Other than sanding to clean off the alloy used to secure the IHS, I cant see why you would want to consider lapping the cores as the covers are very, very thin. Once they are cracked or if a small hole is made from to much sanding (which is real easy on these core tops), thats the end of the chip.

[gabe]

no no, i dont need an excess amount of force. my question was that whether or not it would work with a naked cpu at all; meaning would it make enough contact. sounds like it would and if not, i might need to buy some different screws

screw length and spring tension are adequate for LAPPED CPU IHS, not for bare silicon.

once ihs removed, block will sit on socket. no good. would need to machine step all around base to allow clearance, but block to base plate screw thread will be out of specs (M3 need 3mm thread depth). you could get away with 2.5MM at expense of somewhat weak thread, but less than that, and youre' asking for disaster.

[chinkgai]

thanks for all the input folks. special thanks to gabe for that specific info!

my block arrives in the mail early next week. i'll ponder on whether or not im going to attempt it or not after looking at it carefully.

[ScottALot]

CPUs as a bare chip are flat, right? So lap the block and it should make contact. It doesn't seem worth it, though... a lot of trouble for something so risky.

I said it and it sounded like I meant lap the chip.