g3/800+ |
May, 07, 2003 4:58 PM |
mjoecups358 |
The following is quoted from http://www.xlr8yourmac.com If you have never used there SUPER useful CPU upgrade database, or there other incredible resources... Check it out! Date Submitted: 5/6/2003 Rating (1 to 10): 10 Manufacturer: XLR8 CarrierZIF card Rated Speed (CPU/Cache MHz): G3 800/800 Powerlogix ZIF Max Speed (CPU/Cache MHz): 867/867 Cache Size: 512kb (onchip L2) Mac Type: Power Tower Pro 250 Comments: Bought one of the new 800MHz 750FX ZIFs Powerlogix recently came out with. After the first review, one of the early questions was if it would work in the old carrier cards. Decided to give it a try, and things seem to be going well. I used XLR8's original Carrier ZIF and a custom cooler I made (a little bigger than Apple's stock G3 heatsinks). For configuring, set the jumpers on the ZIF for 66MHz. 100MHz didn't boot when I tried it. Set bus speed as you normally would on the ZIF carrier. Probably safest to flip all the multiplier switches to 'off', since the ZIF overrides them anyway. The base multiplier is 12x, so it'll be around 600MHz to start. Use CPU Director to set the ZIF multiplier where you need it, and you're ready to go. I decided to mess around with various speed settings, and ended up with a fairly stable 867MHz on a 61.9MHz bus without memory interleaved. After interleaving the memory, nothing over 840MHz would boot properly, and most of the time it was unstable. With the fan on 12V, everything will run stable up till 830MHz, but 12V is too loud, so I have it on a 7V circuit which is much quieter, but still has good airflow. Currently running stable at 810MHz on a 45MHz bus. GIves no temperature readings, and Guage Pro's moving memory is useless with this ZIF, as it always insists there's only 5x multiplier. Runs fine in 8.6, 9.1, and OS X 10.0.3. OS X is decent speed wise so far, though I'm just starting out with it, so not much comparison to give. Being able to change the CPU speed on the fly is very handy. When I'm using the INternet, I usually create a very heavy load, which manages to crash any system sooner or later. Dropping the CPU speed to 766 temporarily has helped keep things considerably more stable. I'm giving this upgrade a solid rating of 10 for ease of use and lots of speed for an older Mac. Can't wait till Powerlogix gives us 1GHz+ ZIFs! |
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