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Socket 7 heat sink + fan (thermal paste?)

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First post, by GuyTechie

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My Asus P5A and K6-2 350 MHz came today. To my surprised, there is a warranty void sticker on top of the CPU and even taking it off gives me these sticky "void" residue. That's surprising because I would have thought the sticker would hinder cooling performance. Not only that but there were no thermal paste and the HSF doesn't look like it's all that tightly secured (you can lift it slightly and slide it around).

I may be forgetting (it's been a while of course), but do these CPUs need thermal paste? After all, the factory etch the top with their logo and info, which isn't ideal for heat sink contact in the first place.

I do remember 486 CPU not having any heat sinks, and passive heat sinks with some Pentiums, though.

Anyone retrofit a modern HSF on a K6-2 or K6-3? I'd like to use a highly available 80mm fan for cooling instead of these tiny fans.

Reply 1 of 19, by Deksor

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They don't really need it, although it's still better to have it, but not required

CPUs really started require it when the Athlon/pentium 3 coppermine came out

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Reply 2 of 19, by brostenen

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Heatsinks were mandatory on Amd 486dx2-80, and they suggested them on dx2-66 and passive one were sometimes used on dx33. The pictures I am posting are all of SS7 motherboards.

EDIT:
For thermal paste, you can use everything from the cheap white stuff used around 2004/05. To that silver based stuff.
Does not really matter. Only you'r wallet set's the limit.

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    FIC PA-2013 and K6-III-400 with a huge Athlon Socket-A cooler. (This one has cobber core)
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    Gigabyte GA-5AX and K6-III-400 with a 60mm P-III cooler from Startech.com
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Don't eat stuff off a 15 year old never cleaned cpu cooler.
Those cakes make you sick....

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Reply 3 of 19, by .legaCy

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My Socket 7 Pentium 133 uses Thermal Paste and heatsink with fan attached.
Even my Rasperry Pi 3 uses a homemade Heatsink with fan and thermal paste.
I really like cool operating temperatures, the coolest the best for me.

Reply 4 of 19, by shamino

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I don't think it's critical, but the first CPU where I actually started to notice a heat issue and used thermal paste for the first time was a K6-3 450MHz. As I recall it dropped the temperature about 5C versus being dry, which is how I had always installed heatsinks prior to that time. Prior to that I didn't know thermal paste was a thing.

I prefer to leave socket 7 and socket 370 heatsinks on the soft side. The retaining hooks are not very strong, and it sucks when they break.

Things get a lot more robust with Socket A/462 when they have 3 hooks on each side and they started designing heatsinks to use all of them. I've still never seen a 3 hook heatsink that has the proper tension for a socket-7 or 370, they're way too tight for those sockets unless you bend them by hand first.

Reply 5 of 19, by PhilsComputerLab

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I never use paste for my projects and benchmarking, it just creates too much of a mess.

But if it would be a permanent machine, I see no downside to using paste!

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Reply 6 of 19, by adalbert

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Some older heatsinks had silicone pad glued to them, like this: https://www.amazon.com/400mm-205mm-Silicone-T … k/dp/B007PPEW52

it is good for CPUs that don''t use too much power, it improves heat conductivity and you don't have to clean the CPU when changing it. I have even seen some old heatsinks with aluminium foil between them and CPU.

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Reply 7 of 19, by gdjacobs

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PhilsComputerLab wrote:

I never use paste for my projects and benchmarking, it just creates too much of a mess.

But if it would be a permanent machine, I see no downside to using paste!

Curious... do you use something like de-ionized water?

All hail the Great Capacitor Brand Finder

Reply 8 of 19, by PhilsComputerLab

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gdjacobs wrote:
PhilsComputerLab wrote:

I never use paste for my projects and benchmarking, it just creates too much of a mess.

But if it would be a permanent machine, I see no downside to using paste!

Curious... do you use something like de-ionized water?

More information please.

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Reply 9 of 19, by James-F

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Clean both surfaced with acetone, a small half-pea sized lump of thermal paste on the CPU and press the Heatsink in circular motion on the CPU ( press, don't smear), install the fan.
I don't use thermal paste on my Pentium 233 MMX machine, it is cool enough to touch with a finger.


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Reply 10 of 19, by gdjacobs

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PhilsComputerLab wrote:
gdjacobs wrote:
PhilsComputerLab wrote:

I never use paste for my projects and benchmarking, it just creates too much of a mess.

But if it would be a permanent machine, I see no downside to using paste!

Curious... do you use something like de-ionized water?

More information please.

Just wondering what you use in the absence of paste. Certainly not vegemite...

All hail the Great Capacitor Brand Finder

Reply 12 of 19, by stamasd

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Hey there's nothing wrong with Vegemite. But of course it's not quite as good as Marmite. 😀

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 14 of 19, by stamasd

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PhilsComputerLab wrote:

Nutella for me.

Fine, if you prefer the smell of burnt sugar coming from your PC instead of burnt yeast... :p

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 15 of 19, by nforce4max

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stamasd wrote:
PhilsComputerLab wrote:

Nutella for me.

Fine, if you prefer the smell of burnt sugar coming from your PC instead of burnt yeast... :p

If you really want to stink it use some cheese from a Vietnam era MRE or some surströmming 😈

On a far away planet reading your posts in the year 10,191.

Reply 16 of 19, by stamasd

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nforce4max wrote:
stamasd wrote:
PhilsComputerLab wrote:

Nutella for me.

Fine, if you prefer the smell of burnt sugar coming from your PC instead of burnt yeast... :p

If you really want to stink it use some cheese from a Vietnam era MRE or some surströmming 😈

The surströmming is a bit too chunky, won't work too well unless you process it into a paste. But the process alone may kill you. Same for hákarl.

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 17 of 19, by gdjacobs

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PhilsComputerLab wrote:

Man you ask the oddest questions sometimes...

I try. Seriously, though, I'm wondering what you use aside from paste on a S7 CPU. Water works great for heat transport (better than any paste), but you'd want to use distilled or de-ionized to simplify cleanup in the case of a spill.

All hail the Great Capacitor Brand Finder

Reply 18 of 19, by brostenen

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Those pads, found on old Socket-4/5/6/7 heatsinks. Would this work on something like that?

http://www.ebay.com/itm/100mm-x-100mm-x-0-5mm … tMAAOSwHjNWAhfN

Don't eat stuff off a 15 year old never cleaned cpu cooler.
Those cakes make you sick....

My blog: http://to9xct.blogspot.dk
My YouTube: https://www.youtube.com/user/brostenen

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Reply 19 of 19, by clueless1

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I think when Phil said

I never use paste for my projects and benchmarking, it just creates too much of a mess.

he meant he used *nothing* in place of the paste. 😀 Unless you count the ambient humidity as water.

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