[drHo]

Hello i have overclocked my B&W 450 to 500mhz...runs good so far only WCIII and Unreal broken under OSX. no niggie its no gaming machine ok i want to go higher damn the conswquences!!! i need the small metal jumpers that go on the jumper block that control the cpu speed, bus speed, PCI speed. were do i find them? i've looked at Fry's: too small, Radio Shack: too big. if anybody has overclocked their B&W higher than 550mhz please advise and were did u get your jumpers?

[DrBoar]

I used jumpers from my rather large collection that I partly have salvaged from dead SCSI and IDE drives and some I was given when I requested when I bought disks.

If you search www.mouser.com for "jumper" you get 160 hits so these kind of more pro oriented stores will have what you need.

I got a G3/300 up to 350 with not stability problem at all. At 400 it would not even boot. Overclocking really gives marginal (<50%) CPU boost even if it almost for free so I would not risk frying the CPU or corrupt the HD for a additional 10 % speed gain. If I had a computer only used for games with no other critical use I might push it to the limit but not else.

[drHo]

thanks for the site dude! small problem..which jumpers do i use? i click on description but that dont tell much...do u hapen to know what size the B&W g3's uses? i've tried the .1mm from fry's but they are too small...too short i mean..not tall enough..

[Nostrildomus]

Originally posted by drHo:
thanks for the site dude! small problem..which jumpers do i use? i click on description but that dont tell much...do u hapen to know what size the B&W g3's uses? i've tried the .1mm from fry's but they are too small...too short i mean..not tall enough..

I just bought some and they should arrive in a few days. I believe they are 2mm jumpers. I purchased a bag full and will only need a few for my OC. I can send you a few if you don't find some beforehand

KW

[DrBoar]

www.digikey.com have some description of jumpers in their online catalog
http://dkc3.digikey.com/PDF/T031/P3.html
The page has links to PDFs of the relevent pages of the catalog so there is a lot of other stuff there as well, but the descriptions are very good.

The G3/300 is now 6 time zones away but as I recall the jumpers that fit is those small narrow ones that is used for slave/master settings on modern IDE drives. It is not those big jumper that was used on old macintoshes with SCSI disks during the 68k era and for the nubusPPCs.

hope it helps

[suprz's ghost]

You can always take the stock jumpers out of the jumper block and reconfigure them to the clock speed you are looking for. you just pry them out of the block with a pin and put them in the correct spots using a paid of tweezers. i know of people who have done that before

[drHo]

Originally posted by Nostrildomus:
I just bought some and they should arrive in a few days. I believe they are 2mm jumpers. I purchased a bag full and will only need a few for my OC. I can send you a few if you don't find some beforehand

KW

dude thanks!! let me know and we can arrange something..but i'll keep on the lookout for some local ones.

yeah i've rearanged the ones that came with my g3 but there is not enough for me to go to 550mhz or higher..just 500mhz

[Seamus]

I overclocked my B&W G3 from 350 to 450mhz almost 3 years ago. This thing NEVER crashes...I have uptime records of over 100 days. I tried raising it to 500 last year...even added thermal paste and a fan in an attempt to lower the temperature enough...but it didn't work. I think the voltage was the limiting factor in that situation, because that chip was damn cold.