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Old 13-12-2006, 17:21   #1
Calamitydrains
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Put that old CPU to use

Just wanted to share my new discovery... A USB Pentium I co-processor!


(click for bigger)


As you can see, it's probably the ultimate gamer PC mod. Observe how the life of an ordinary mug of tea is prolonged almost indefinitely, thanks to the awesome abundance of raw processing power provided via an ordinary USB2 port.



Enjoy!
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Old 13-12-2006, 17:22   #2
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Ha! That's brilliant!
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Old 13-12-2006, 17:30   #3
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does it work? if so i want to make one now
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Old 13-12-2006, 17:40   #4
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Err, well it's a reasonable cup warmer and thanks to the revolutionary design it will work with practically any OS without any special drivers. Here's a look at what's inside. Note the neat two-wire USB interface (that's 'Power' and 'Ground' ), and the purely thermal interface to the underside of the CPU. Clever, eh?

(In case you're still interested in rolling your own, the resistors are a pair of farily meaty 4.7 ohms wired in series and placed across the +5V from the USB port. A bit of thermal paste helps spread the heat into the Pentium.)
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Old 13-12-2006, 17:45   #5
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ahh right, i thought he'd rigged up power to the power pins on the pentium, which i would have thought might heat it up.

Im not so sure on effectivly "shorting" my 5v out from my mobo
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Old 13-12-2006, 17:48   #6
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Originally Posted by welshtom View Post
ahh right, i thought he'd rigged up power to the power pins on the pentium, which i would have thought might heat it up.
Thats what I thought aswell, now heres a thought run a 12v transformer from the wall to a pentium 4 that should keep things very toasty
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Old 13-12-2006, 19:14   #7
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Quote:
Originally Posted by Calamitydrains View Post

(In case you're still interested in rolling your own, the resistors are a pair of farily meaty 4.7 ohms wired in series and placed across the +5V from the USB port. A bit of thermal paste helps spread the heat into the Pentium.)
they are not meaty resistors at all... 1w max from the picture...

if you want a man size resistor for the job then rs stock 25w ones at the same value. you then just need to use thermal adhesive to connect the heatsinks of the resistors to the bottom of the chip.
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Old 14-12-2006, 15:19   #8
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I(amps)=E(volts)/R(resistance)
I=5/9.4
I=0.531 amps

P(in watts) = I x E
P=.531 x 5
P=2.655 watts

Putting in resistors capable of handling more watts will do nothing to change the amount of heat given off.
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Old 14-12-2006, 21:22   #9
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Originally Posted by Tami View Post
I(amps)=E(volts)/R(resistance)
I=5/9.4
I=0.531 amps

P(in watts) = I x E
P=.531 x 5
P=2.655 watts

Putting in resistors capable of handling more watts will do nothing to change the amount of heat given off.

tis true, but if you increase the voltage, ie take it off the 12v line from the psu rather than the usb side... you end up with 15 and a bit watts of heat... and a drain of 1.3A on the psu.
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