Core Solo + heatsink? No thanks... (core solo running naked inside)

Being bored, I modified a rare but crappy Core Solo 1850 processor to run at "ULV" spec.

This is just a simple hardware mod, remove BEL1 pin.
Only runs at 1GHz, with a 533MHz FSB modified to 667MHz FSB and just chugs along. This processor does not need a heatsink :)


http://www.importjdm.com/shipped/core_solo1.jpg
http://www.importjdm.com/shipped/core_solo2.jpg

Heh, nice.

how low voltage can you take it?

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Originally Posted by nn_step

how low voltage can you take it?

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Like to know that too...

:slobber: :slobber: :slobber: :slobber: :slobber: :slobber: :slobber:

THIS IS ABSOLUTELY AMAZING :toast:

temp maxes out at 71C, Idle sits at ~40C... not bad at all.


Not sure how low I can mod it down. This thing uses like 5.5W. Later I will take photo of my kill-a-watt @ idle and at 100% full CPU load. Its kinda cool, only goes up a few watts

I will probably play with hardware voltage mods on the CPU later to see if I can get it much lower. Not really sure the point, it is already ULV to the max :) For me this is just a throw away CPU along with all the other core solo's I have sitting around.

I wouldn't call it a throwaway. My terastation has a ppc 266 and it is an amazingly useful little box. Much work can be done given 24/7 to do it in!
I'm very impressed with 5.5W.

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Originally Posted by irev210

temp maxes out at 71C, Idle sits at ~40C... not bad at all.


Not sure how low I can mod it down. This thing uses like 5.5W. Later I will take photo of my kill-a-watt @ idle and at 100% full CPU load. Its kinda cool, only goes up a few watts

I will probably play with hardware voltage mods on the CPU later to see if I can get it much lower. Not really sure the point, it is already ULV to the max :) For me this is just a throw away CPU along with all the other core solo's I have sitting around.

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5.5w wow, its probably using less power than the chipset

5.5 is my guess, that is what other ULV core solo runs at


U1500 2 MB L2 1.33 GHz 533 MHz 5.5W
U1400 2 MB L2 1.20 GHz 533 MHz 5.5W
U1300 2 MB L2 1.06 GHz 533 MHz 5.5W


Standard core solo uses 27W

I have both, I will test the differences tomorrow.

so with a basic heatsink with no fan should do about 40-50 load.

This would make an insanely awesome HTPC rig.

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Originally Posted by ahmad

so with a basic heatsink with no fan should do about 40-50 load.

This would make an insanely awesome HTPC rig.

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he could put a Micro heatsink and it wouldn't hit 40C

Wow.. you could put a chipset cooler on it and it would have trouble going above ambient :p:

you sir, are a god among men, awesome!

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Originally Posted by irev210

5.5 is my guess, that is what other ULV core solo runs at


U1500 2 MB L2 1.33 GHz 533 MHz 5.5W
U1400 2 MB L2 1.20 GHz 533 MHz 5.5W
U1300 2 MB L2 1.06 GHz 533 MHz 5.5W


Standard core solo uses 27W

I have both, I will test the differences tomorrow.

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yeah that explains why the Sony UX series can use these CPUs then :D

very light on battery and almost no cooling required :toast:

Not bad, lets say xtreme :D

This might be a really dumb question, but what mobo are you using with that CPU?

Looks like a Asus N4L-VM DH.

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Originally Posted by BulldogPO

Looks like a Asus N4L-VM DH.

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yup, great media center board, sucks for overclocking.




if anyone has any questions about the N4L-VM DH, please ask away. It has a few quarks, but it is the best mATX media center board i've tested.

But what is that thermometer?

wow, thats nice :woot:
how does it perform? can you play high def content on it?

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Originally Posted by irev210

yup, great media center board, sucks for overclocking.




if anyone has any questions about the N4L-VM DH, please ask away. It has a few quarks, but it is the best mATX media center board i've tested.

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That's because the best HTPC board is the Aopen i975Xa-YDG (ATX of course). ;)

wow very nice:) could you give us a link were you picked up that thermometer from.:toast:

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Originally Posted by freecableguy

aopen board is MoDT, key letters DT=DESKTOP :)

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Though the aopen board is nice, wish it was mATX!!! Besides, I got a nice pointless VIIV logo when my computer turns on :)

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Originally Posted by triple_A

wow, thats nice :woot:
how does it perform? can you play high def content on it?

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im sure it can play hd-dvd/bluray fine, and most other h.264/VC-1 media.


I doubt it could play 20mbit/sec .ts file though. .ts is pretty CPU intensive.

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wow very nice could you give us a link were you picked up that thermometer from

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Thermo monitor here-

http://www.sidewindercomputers.com/thermohawk200.html

Awesome irev!

That is really cool to be able to run that thing not only passive, but naked. Just insane. That would be awesome for car PC's and the such.

Thanks for the thermometer link as well, I will probably purchase one soon.

Bryan d

hehe nice did not know such thing was even possible

How do you do that mod? And can it be done with Core based Celeron-M's on Aopen i975Xa-YDG? Or will I have to by a Core Solo?

heh, you can do this with almost any cpu actually, though you gotta underclock most a bunch. i topped out at 55c load with an FX-55 without a heatsink at 800mhz, 1v. though i did have a fan blowing over the cpu the area around the socket :toast:


regardless, very nice. it seems that most heatsink reviews lead people to believe that there is no possible way to run a cpu without a heatsink, thus many are afraid to even try. props for being awesome and going for it :D

can't you undervolt it more?

I run my Pentium M 760 using notebook hardware control @ 800MHz and 0.7vcore fully stable

ADDED: 2GHz @ 1.068v, improves battery life nicely :)