FCPGA / HSF Stability

[Loud]

This has probably already been discussed ... but I can't seem to find it.

I just purchased a Celly 800 FCPGA. Now that I can look at it in my hand, I'm somewhat concerned about hanging the weight of my HSF on that little blue rectangle. I keep seeing references to broken dies and such - okay, more so in the AMD arena than here.

I've read several threads describing how a copper shim will raise the temp, so that's not an option. I've seen reference ... somewhere ... to some small tabs that go out towards the corners to support / stabilize the HSF. Is this a good solution?

The CPU will be on a slotket, hanging vertically with the strap going north and south across the CPU.

Am I worrying over nothing, or should I be looking for parts? Any links to where I can buy recomended parts will be greatly appreciated.

Thanks. :cool:

[KILLorBE]

I don't think you should worry, I'm using a PEP66+Peltier and a 3/8 inch 5*5cm coldplate, which I'm sure weights more than 500 grams, All I did was put a small piece of double sided tape (about 0.5*0.5 cm) on each corner of the chip.

**EDIT** the double sided tape I used is about 1mm thick and I left the protective layer on it.

[saytan]

you would have to use the HSF like a hammer to crush an intel core



they are more expensive cos they are better made

[Yodums]

The shim I don't think will work on slotket's as the heatsink is vertical.

What heatsink do you plan to put on the slotket?
A big heatsink will probably come in contact with the chipset if you had a board like me(Abit BE6)
..

If you can look around for a PEPT66 which was designed for slotket as I think one side was heavier than the other it has a better contact to the core as it applies more weight= more heat transfer.

Yodums

[Loud]

Thanks to all for the tips. :cool:

[deez]

you can get a nonconductive cpu spacer for coppermine CPU's for a couple of bucks

I use one but not cuz I'm worried about crushing the core...my HS total weight is 510 grams which is over a pound. I use the spacer to keep the heatsink mounted flush on the CPU

[cyberey66]

I was just debated this today, mostly because my die isn't fully flat and I'm using zip ties for my heatsink. I have a slocket and a FCPGA 1GHz. I couldn't find what to use though, I tried some very thin cardboard, but still just to thick. Just now I saw my thin gaskets from my pelier. I think I'll four squared from that and hope it isn't to thick. I can't OC now, I freeze after about 20 minutes in window@112 fsb, and my heatsink it lapped and pretty big. If I get that OC after my shims are in I'll post back.

[Loud]

Originally posted by deez
you can get a nonconductive cpu spacer for coppermine CPU's for a couple of bucks

I use one but not cuz I'm worried about crushing the core...my HS total weight is 510 grams which is over a pound. I use the spacer to keep the heatsink mounted flush on the CPU

Flush on the CPU is good. :)

I've looked around, and can't seem to find anything like this. Would you be a pal and point me in a general direction, please? :D

Thanks. :cool:

[Yodums]

http://www.heatsinkfactory.com

[cyberey66]

I found the solution. I took some thin gasket foam, they sell it is sheets, and just cut out 4 squares. Glued them on with a small dab of glue and rested the heatsink on the chip and held it up to the light. Saw that it was just a hair over the CPU which was great. I took out the 600 sand paper and sanded each square until the heatsink sat perfectly flat. I then cleaned of the cpu, took some goof off to clean my heatsink, did the ussual thermal goo stuff, and zip tied her up. The squares where great, the sink sat flat the whole time I zip tied it up. Now I'll se if I can get a good OC now, to bad all I had was silicon thermal paste, I need to get some ACII.

Well I'll try to figure out the thinkness of the gaskets, i recomend trying it. The size was almost perfect, accualy it being just to big gave me the chance to tune it perfectly.

I'll post pics, I just need to upload them.

[cyberey66]

pics

[cyberey66]

really sorry about the triple post, i don't know how to attach more than one thing at once, if you can.

[Loud]

Yodums - thanks for the link.

Satan - thanks for the tip and the great pics. (Does it mess with anyone else's mind to be thanking Satan? j/k :D )

Thanks again to all for the great replies. :cool:

[William]

you can use a shim on a slocket. I used one(non conductive) with my celey 667 when I had the GlobalWin heatsink on it(I was afraid of crushing the core with that clip) and with the retail heatsink earlier to keep it flush.

[cyberey66]

Originally posted by Loud
(Does it mess with anyone else's mind to be thanking Satan? j/k :D

haha, it's funny because I get that a lot when people say thanks. They're like, "thanking satan, whats wrong here"

Well, still no stability with an OC.:( I i think it's XPs fault though, I'll have to stick on 98 or like 95 with nothing installed just for testing if my OC isn't going because of XP. I'm kind of disappointed because I spent a lot of time getting my heatsink on just right, and getting good air flow in my case. I think it could be because I'm using silcon thermal paste.

[deez]

Yep www.heatsinkfactory.com is where I ordered my CAK38 and spacer...they take care of orders quickly.

Satan...I'm using XP Professional and OC results dont seem too different over 98 or 2K. Dont use 95 for testing. I'm also using Radio Shack silicone thermal paste and the stuff works great

I think ASII is a bit hyped up in this forum. Airflow and HS are important as well as good solid PCI, AGP devices and memory.

[cyberey66]

Maybe I have a dud then. My cpu won't even do 1.1GHz, with a huge lapped heatsink, and volts up to 1.9. Sucks, should have got a 800, most say they OC out of the box.

[Yodums]

Originally posted by satan
Maybe I have a dud then. My cpu won't even do 1.1GHz, with a huge lapped heatsink, and volts up to 1.9. Sucks, should have got a 800, most say they OC out of the box.

Do you mean your 1gig won't do 1.1?

Darn it must be a board or slotket issue then or something because those chips overclock 1333 on average and something is definitely holding you back.

[deez]

Originally posted by satan
Maybe I have a dud then. My cpu won't even do 1.1GHz, with a huge lapped heatsink, and volts up to 1.9. Sucks, should have got a 800, most say they OC out of the box.

noticed in your sig that your RAM is pc100 perhaps thats your problem

[cyberey66]

Originally posted by deez


noticed in your sig that your RAM is pc100 perhaps thats your problem

I though of that, but it's cas2 pc 100 and I have the -33MHz option too. I tried cas3 and cas2 with -33MHz. It's not the ram. My slocket is the abit "slocket !!!", but my board is a cheap one. It's the via apollo pro+ chipset. I'm kind of mad, I wish my temp monitoring didn't break. If I got low temps, I'd know it was my board.

[deez]

Is the heatsink warm to the touch at all when running under full load?

Also using zip ties on your heatsink may not be keeping it flush with the CPU....what type of HS is it?

[cyberey66]

The heatsink is cold to the touch, and I attached pics of it. It should be flush, I spend half an hour sanding those 4 little shims on my CPU to make the heatsink always rest flush. I also got very risky and even lapped the CPU a very little. There is also some suction with the CPU and the heatsink, and that's a good sign of contact.