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From: mc on 3 Jul 2010 15:26
i changed the cpu in an optiplex 240gx and 260gx. everything works
fine. I did not install a new (pink) membrane that is stuck to the
cooling fins. Is this important or not?
mc
From: William R. Walsh on 6 Jul 2010 11:15
Hi!

I would recommend cleaning that membrane material off. Scrape it
smoothly off with something like a credit card edge and use isopropyl
alcohol to assure the surface is clean. Replace it with any good
quality heatsink compound, applied in a *thin* layer.

Radio Shack used to sell some under their own brand. It was cheap and
worked well. I'm not sure they are carrying it any longer.

You should do something, as your processor could overheat under load.

William
From: BillW50 on 9 Jul 2010 18:17
In
news:140d2683-27ad-414d-9c0a-d55c7af24530(a)u7g2000yqm.googlegroups.com,
William R. Walsh typed on Tue, 6 Jul 2010 08:15:33 -0700 (PDT):
> Hi!
>
> I would recommend cleaning that membrane material off. Scrape it
> smoothly off with something like a credit card edge and use isopropyl
> alcohol to assure the surface is clean. Replace it with any good
> quality heatsink compound, applied in a *thin* layer.

I have no WiFi here, so I can't see the original post. So forgive me if
I get something wrong. And William, you are okay with isopropyl alcohol?
I didn't think that was clean enough. Acetone is what I hear more often
than not.

And careful, some heatsinks use thermal pads and don't use any grease on
these. They don't need them for one and I am not sure if it hurts them
if you do use grease.

> Radio Shack used to sell some under their own brand. It was cheap and
> worked well. I'm not sure they are carrying it any longer.

They call it heatsink compound if I remember correctly.

> You should do something, as your processor could overheat under load.

One should monitor the CPU temperature before and after. Both under idle
and running at 100% CPU usage. Get to know what it should be. I always
monitor my CPU temps on all of my machines. That way you can see pending
problems.

Careful with too low of a reading too. As I have one laptop (and I have
two more the same model), and only this one reads low. Like 20 to 40
degrees too low. And the CPU will burn out if you push it max for heavy
games in about 6 weeks.

I assume it burns out because the motherboard believes the CPU is
running cool all of the time and the fan doesn't bother kicking the fan
up any higher.

--
Bill
Asus EEE PC 701G4 ~ 2GB RAM ~ 16GB-SDHC
Windows XP SP2 (quit Windows updates back in May 2009)


From: BillW50 on 9 Jul 2010 18:24
In
news:f5763c39-3277-4e9a-91ad-22238ae69686(a)u7g2000yqm.googlegroups.com,
mc typed on Sat, 3 Jul 2010 12:26:06 -0700 (PDT):
> i changed the cpu in an optiplex 240gx and 260gx. everything works
> fine. I did not install a new (pink) membrane that is stuck to the
> cooling fins. Is this important or not?
> mc

OH YES THAT IS VERY IMPORTANT!!!! That is a thermal pad! You do not use
thermal paste like Ben said with thermal pads. You use them completely
dry.

Damn! I never peeled one of those off before. Does it feel sticky on one
side like tape?

--
Bill
Gateway MX6124 ('06 era) 1 of 3 - Windows XP SP2


From: BillW50 on 9 Jul 2010 19:09
In news:i187jr$g3s$1(a)news.eternal-september.org,
BillW50 typed on Fri, 9 Jul 2010 17:24:57 -0500:
> In
> news:f5763c39-3277-4e9a-91ad-22238ae69686(a)u7g2000yqm.googlegroups.com,
> mc typed on Sat, 3 Jul 2010 12:26:06 -0700 (PDT):
>> i changed the cpu in an optiplex 240gx and 260gx. everything works
>> fine. I did not install a new (pink) membrane that is stuck to the
>> cooling fins. Is this important or not?
>> mc
>
> OH YES THAT IS VERY IMPORTANT!!!! That is a thermal pad! You do not
> use thermal paste like Ben said with thermal pads. You use them
> completely dry.
>
> Damn! I never peeled one of those off before. Does it feel sticky on
> one side like tape?

And another thing... using it without the thermal pad... the heatsink
might not make good contact since it might be designed for using with a
thermal pad alone. Thus you might end up with a gap and the CPU will
burn out in no time. I hope it isn't too late to warn you about this.

Thermal pads looks generally like a rubbery type of pad. Although some
actually look and feel like a metal plate. And they come in different
colors, like pink, gray, black, etc. For the inexperienced, if you don't
see any white paste, don't use any because it must be using a thermal
pad instead.

Don't touch the thermal pad with your fingers since the oil from your
fingers I believe will contaminate them. It is okay to clean the CPU
side with acetone or some other approved cleaner. I don't know about
isopropyl alcohol though as Ben suggested. That is a new one for me. As
I thought it leaves too much residue to be any good. And rubbing alcohol
contains isopropyl alcohol too, but it also has oils which I believe
would be very bad for sure.

--
Bill
Gateway MX6124 ('06 era) 1 of 3 - Windows XP SP2


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