advice on heatsinks

[370forlife]

Re: advice on heatsinks

Those are the stock 462 coolers with a bigger fan on it. They are very small, the same dimensions as the processor.

The rosewill is quite large. Lots of dissipation area.

Ohh, and I meant the north bridge heatsink, not the cpu, the North bridge heatsink on these came without any thermal paste on them.

[ratdude747]

Re: advice on heatsinks

yes, but id rather overclock less and be able to buy 2 cpu fans forless than the price of one then buy that rosewill that will probably not fit on the board. a had a bunch of foxconn fans that didnt fot because the latch was too long and hit memory chips... look at the pic i posted again.

is that dynatron fan an improvement? i have another that could use an upgrade too (remeber, presario 7000 running hot).

[shadow]

Re: advice on heatsinks

That looks like a nice cooler for a Socket 370. Hopefully it fits nicely!
And yes, 2.20Ghz is a damn nice overclock considering the top speed (at stock frequencies & multipliers) for the P3 is 1.4Ghz.

[NxB]

Re: advice on heatsinks

Maybe with water-cooling or liquid nitrogen.

[Per Hansson]

Re: advice on heatsinks

NxB; That should be doable yes

http://d346870.u64.netvs.ch/database.php?cpuid=411

[370forlife]

Re: advice on heatsinks

yes, but id rather overclock less and be able to buy 2 cpu fans forless than the price of one then buy that rosewill that will probably not fit on the board. a had a bunch of foxconn fans that didnt fot because the latch was too long and hit memory chips... look at the pic i posted again.

is that dynatron fan an improvement? i have another that could use an upgrade too (remeber, presario 7000 running hot).

I have two of those dynatron heatsinks also, they are small. Smaller than the stock intel one. They just shoe-horned a bigger fan on it. (attached a picture of it compared to a p3 1ghz)

I don't see why you don't think that rosewill won't fit, its not huge, and everything else that has been shown so far is smaller than the stock intel heatsink, and not much better. No point in buying a heatsink if you are not going to get one that is better....

[ratdude747]

Re: advice on heatsinks

you missed my point. first, your stock fan vs mine are 2 different models- you have the tulatin fan i have the coppermine fan

it looks like the rosewill is too big becase i would be crushing memory chips due to the overhang of the heatsink. i hade a few foxconns that had thumblatches on the clip that wouldnt fit without removing a chip effectivly ruining the point of buying the board in the first place. and finding a decent 92mm fan is a bitch because they all have sleeve bearings or cost an arm and a leg (for a fan). also, you can only put an 80mm on that one due to the odd fan hole position.

if you can fit a 92mm fan on it and you really think i can get away with 4 memory chips, then i might get it (assuming my mom doesnt tell me to forget it since she thinks i spend too much).

also, does anybody know about how much i can overclock an 800 without overvolting. i heard overvolting kills cpus most of the time.

[ratdude747]

Re: advice on heatsinks

ignore that post- it should read like this:

you missed my point. first, your stock fan vs mine are 2 different models- you have the tulatin fan i have the coppermine fan which is smaller. or maybe i have the original celeron fan i thought socket a fans were better than socket 370 ones anyway. also, the dynatron would have better airflow because the fan is ducted into the heatsink. look carefully at the picture:



at $4 a piece, sounds like a good deal. i dont have alot left to spen on this, so no h20 cooling- they dont even make water blocks of s370 anyway. mabe socket a, but that would be overkill since do not want to overvolt more than a very tiny bit.

it looks like the rosewill is too big because i would be crushing memory chips due to the overhang of the heatsink. i hade a few foxconns that had thumb-latches on the clip that wouldnt fit without removing a memory chip effectively ruining the point of buying the board in the first place. and finding a decent 92mm fan is a bitch because they all have sleeve bearings or cost an arm and a leg (for a fan). also, you can only put an 80mm on that one due to the odd fan hole position.

if you can fit a 92mm fan on it and you really think i can get away with 4 memory chips, then i might get it (assuming my mom doesn't tell me to forget it since she thinks i spend too much).

also, does anybody know about how much i can overclock an 800 without overvolting. i heard overvolting kills cpus most of the time.

[370forlife]

Re: advice on heatsinks

That p3 is a coppermine, not a tulatin.

I have no tulatins

I ran those rosewill heatsinks on my VP6 no problem, no crushing ram, no overhang. The holes for the fan ARE FOR A 80MM. The fan that is on it is a custom rosewill 92mm with 80mm holes.

The heatsink I showed in that pic compared to the p3 is the same as the dynatron you want to get. It is the stock AMD socket A cooler. It has terrible airflow because the fins are extremely close together, I used it on a 1600+ and it was junk because it ran about 60C idle and shut off the motherboard at about 1/2 load because it would overheat. (that was with a delta 60mm 35cfm screamer pulling air through)

[ratdude747]

Re: advice on heatsinks

then what do i have? medocino cooler? i got jipped by accident.

beside, i thought micro fins were a good thing (more surface area)

i found another fan that i modded. its a Masscool 5R058B3-H:



i modded it by:

-removing metal grate

-adding spacer screws in the screw rails

-flipping fan over (above step needed so the fan would clear the fins

-clamping end of cable between fan screw and spacer screw (on heatshrink on cable, to act as stress relief and to keep the cable on the fan, not in it)

-used alum. foil tape tho seal gap between fan and heatsink (covers top2-4mm of fin)

will that suffice until i can afford new coolers (the compaq just got recapped and needs a new cpu- the p3 866 died, and better fan)?

[ratdude747]

Re: advice on heatsinks

and, 370- did you actually check the mobo pic i posted? the clip area has VERY tight clearances. alot of asus p3 boards are like this.

would a sleeve bearing fan work for that? a have a very nice dynex one that has leds that turn on and off in a pattern (makes for a nice light show)

[gdement]

Re: advice on heatsinks

also, does anybody know about how much i can overclock an 800 without overvolting. i heard overvolting kills cpus most of the time.

I'd base expectations on how early or late that CPU is. If it was a high end chip at time of production then it probably won't go much faster. If it was low end, then it might have a lot of slack.

I don't know specifically about that chip but to get a rough impression I'd look up the s-spec and see what stepping it is, and what other speeds were made in that same stepping.

I had 3 slot-1 P3 600E (100fsb) coppermines that I tried overclocking a long time ago. 2 of them were a later stepping (cB0 I think) and ran 840/140 stable on normal voltage, didn't bother testing beyond that as I just wanted to validate running them 800/133. (I believe in testing beyond the target speed, otherwise you get problems later).

The other was an older stepping (cA2?) and didn't go that far, a little over 700mhz I think.

If yours is an 800/133 then the fsb might hold you back.
If it's 800/100 you're not likely to hit 1066/133 with any coppermine.
800 wouldn't be my favorite speed to overclock from because I'd rather get to a supported PCI ratio. With those in-between speeds, some boards let you underclock the PCI but most of them seem to assume you want to overclock it instead, which I'm loathe to do.

[Wizard]

Re: advice on heatsinks

I have found that too dense fins spacing is a hinderance and too thin fins as well especially with aluminum. This is called skived fin heatsink. If far apart spaced and made of copper, better but not totally better. There is another type of heatsink this I do not like either is stamped fins if too closely spaced example:

http://www.frostytech.com/articlevie...id=1882&page=2

Good heatsinks should have the features:

Copper base (compressed together during forging process or bolted to the heatsink not pressed round button due to poor machining EXCEPT P4 retail intel heatsink with copper button, it is well made).

Good thickness fins with about 2/3 wider spacing compared to thickness of fin itself.

If heatpipe heatsink with copper base, I expect to see thick fins widely spaced apart.

Example:

http://www.silentpcreview.com/article290-page1.html

I'll take a picture of my heatsinks with forged copper/aluminum units.

Cheers, Wizard

[370forlife]

Re: advice on heatsinks

They're usually not forged but extruded, if they were forged that would be the world's best forge to be able to make all the fins in the heatsink that well, not to mention how dense it would be.

Extrution, think of it like those playdoh shapes that you push the playdoh through to make a long string of the shape. Except with a heatsink shaped hole and very hot aluminum instead of playdoh.

[370forlife]

Re: advice on heatsinks

http://www.newegg.com/Product/Produc...82E16835200017

or this might do

http://www.newegg.com/Product/Produc...82E16835200017

maybe even this

http://www.newegg.com/Product/Produc...82E16835200017

I would even go with this

http://www.newegg.com/Product/Produc...82E16835200017

The copper plate is screwed on (at least my thermaltake versions were, the rosewill looks like its on there some other way, probably with thermal epoxy), on my thermaltake version they had a arctic silver type compound between the copper and the aluminum. The fins are spaced apart well enough for good airflow, lots of them for a large surface area, and no IT WILL NOT GET IN THE WAY OF YOUR RAM. They are just bigger than the stock intel coolers, but not ginormous, look at the attached pic of a VP6, notice how close the socket next to the ram is, I had these same rosewill/thermaltake coolers on both of the processors and ram in every slot.

[KeriJane]

Re: advice on heatsinks

then what do i have? medocino cooler? i got jipped by accident.

beside, i thought micro fins were a good thing (more surface area)

i found another fan that i modded. its a Masscool 5R058B3-H:

will that suffice until i can afford new coolers (the compaq just got recapped and needs a new cpu- the p3 866 died, and better fan)?

Hi Ratdude

I studied Heatsinks for awhile while trying to get PCs to run quietly.

Closely-spaced fins do offer more surface area but there are some considerations:

1- They will tend to clog up with dust very quickly.
2- They require more air pressure from the fan to make effective use of that increased surface area. This means using a fast and noisy fan to force air though the closely-spaced fins.

Copper is a better conductor of heat than aluminum, but it's quite heavy. Attaching a heavy heatsink to a CPU socket is a bad idea, especially if the board is in a tower case instead of a desktop. More modern designs attach the heatsink bracket directly to the board, not the socket which maybe isn't great but is better.

My suggestion:

Use an aluminum Heatsink with moderately spaced fins. Also, it's a good idea to "lap" and polish the contact area that touches the CPU so it is absolutely flat and very smooth.
Personally, I used wet/dry sandpaper of increasing number all the way up to 2000 on a flat surface with water. Then to polish to a mirror finish I used the "Step 3 and Step 4" parts of a wide 4-way fingernail file.

Having obtained a flat, smooth contact area, one should use Arctic Silver 5 or similar as a thermal transfer compound (grease). Even a mediocre Heatsink can perform decently if there's good contact.

The surface of a Zalman cooler is a good example- flat and mirror finished.

Have Fun!
Keri

PS> do any lapping in a place where staining won't be a problem and wear Playtex gloves. The fine aluminum particles can be difficult to clean off of practically anything.

[Wizard]

Re: advice on heatsinks

Keri is right about this reasons. Night is late and I'm all out of time bec this is my bedtime so I'll get pics of heatsinks up this weekend if I can.

Like Keri, I studied and experimented lot of heatsinks and came up with this experiences.

Cheers, Wizard

[ratdude747]

Re: advice on heatsinks

370, you sent me 4 identical links

i will buy those as soon is i have the money to do so. i might check ebay, etc for theese

[ratdude747]

Re: advice on heatsinks

forget the rosewills at 8 dollar shipping thats way too much.

[ratdude747]

Re: advice on heatsinks

oh
these
look nice