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Underclocking the i-Opener?
Underclocking

New MessageUnderclocking the i-Opener? (modified 0 times) Scott_A
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I don't know if this has been discussed, but I and a few others at work are wondering if the CPU clock frequency could be lowered to reduce heat, and a fan would not be necessary.
Free BeOS - http://free.be.com/ , or be cool and buy the Pro version.
06-03-2001 14:55:29

New MessageRE:Underclocking the i-Opener? (modified 0 times) laserfan
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I wonder what CPU(s) you might be referring to. I put in a WinChip2 and cut the stock heat sink down to fit w/the adjacent HD. No fan--deadly silence--and so far no noticeable heat or problems w/24hr operation.
06-03-2001 15:22:21

New MessageRE:Underclocking the i-Opener? (modified 0 times) Scott_A
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laserfan: do you use the RF sheild? This is the main thing that is keeping the i-Opener hot. Winchip2 200.
06-03-2001 15:27:39

New MessageRE:Underclocking the i-Opener? (modified 0 times) laserfan
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Re: the shield--I had already cut-out the RF shield for a Tennmax fan, but only for that small area of the CPU/fan combo. Now of course only the heat sink appears thru the case in back.

I tried Motherboard Monitor today on the IO and it did not detect any sensors on board; wish I could determine what temp it is running at. But subjectively there is minimal warmth above the CPU and nothing at all of consequence over the hard drive, a 4Gig Hitachi as I recall.

Without the noise of a fan the IO instantly becomes my favorite computer--always available and <almost totally> silent. Now the last thing I want to do is to get the Email LED to behave in a civilized fashion, but that's for another thread.

06-03-2001 17:46:11

New MessageRE:Underclocking the i-Opener? (modified 0 times) Scott_A
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Okay, so the sheild and case above the heatsink are completely removed? no CPU fan? just heatsink exposed to air?
06-03-2001 18:12:02

New MessageRE:Underclocking the i-Opener? (modified 0 times) ckbone
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Look...The thing came with no fan...only a very large heat-sink. It works ok for some people, even cut-down. The cpu temp like this, un-modified cpu, runs 50/55C. Unfortunately this heatsink does not contact the CPU equally well on all I-Openers....some run VERY hot without a fan. If you want a cool, long-lasting I-Opener, you need some kind of fan cooling. There have been many posts on this subject....going back a year or more. Lasagna fan= alive and well, and cool I-Opener.
06-03-2001 18:24:53

New MessageRE:Underclocking the i-Opener? (modified 0 times) laserfan
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Scott asked:
>Okay, so the sheild and case above the heatsink are completely removed?
>no CPU fan? just heatsink exposed to air?

The shield has a 2" square hole in it, but the plastic case back is intact. The heatsink is now about 1/3 the size of its former self. There is/was some thermal tape on the back of the heatsink which I sprread w/a little more thermal compound. The heatsink is now attached to the MB w/only 2 screws, but it makes a plenty good connection; I put a couple of small pieces of foam tape on the left side of the heatsink (not screwed down)and the assembly keeps that side secure enough for good contact w/the CPU.

ckbone knows better than me, but I believe that the WinChip C6 that was originally in this v1.0 was overclocked a bit, and it's been reported before that the WinChip2 200MHz upgrade runs cooler than the older WinChip. Anyway, I don't argue with success and this thing runs plenty cool I think--only time will tell for sure.

I'm done.

06-03-2001 20:32:49

New MessageRE:Underclocking the i-Opener? (modified 0 times) BadFlash
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Any of the CPU's I've tried (K62P, K62+, K63+) all laptop CPU's will work at 200Mhz with the stock heat sink. Obviously, the Winchip and Rise will. I have not tried a winchipII, but I see no reason it would not work.
06-05-2001 09:15:00

New MessageRE:Underclocking the i-Opener? (modified 0 times) Perplexer
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I'll chime in here. Winchip2, heat sink with about 1/3 of the fins removed. Runs nice and cool.
06-05-2001 10:54:01

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