1.) Got me a Back-up G4 MDD to my 1.25 Dual But they made a mistake.It was agreed that the Office of that Profi Musician and Video Editing Office removes the Drive. They did,but they removed the Disc Drive and left Hard Drive on.Maybe there was a second,i dont know about. 2.) So i got me another MDD for Parts. YM4213ARQU9 As they are all 3 1.25,but have differend Heatsink.So i fired everyone up to see what i have. Now,the one(1.) is a 1,25 ghz Dual with Sheed Heat sink during mine old has Aluminium Sink. And the other(2.) is a Single 1.25 ghz with Sheed Sink,i decided to remove Disk Drive and forward to the Market again. But no. There single is fast,i dont believe.Faster then my old Dual 1.25 ghz. All running OSX 10.5. I was sure just upgrade to 1.42 could make them faster. Have 2 Gb Ram and OSX 10.5 So,why is my old that slow?And Safari likes crashing after a few minutes. I found in another website someone explaining,to renew Heat creme between CPU and Heatsink before doing anything else on the Hardware,as overheating is often the matter. Don't know anything about that. But i had twice problem that it stook during Boot on the OSX 10.5 Sunlight Picture,and i have a bit the Idea it could be the Encrypter not working well by decrypting. But now i have a Machine too many,and sadly the single Processor 1.25ghz Machine runs much better then the both Dual,all 3 Version with only Firewire 400. The other Thing is the Heatsink.Think the Sheed Metal Sink are the later Version and not that Noisy. The Single must work hard that i hear the Fan,during my old,with Dual Processor and Aluminum Sink is like a lovly Dog who barks when coming Home,i hear when arriving Home blowing like a Jet engine,to know it has not been a Power Failure On the other Hand heats that Mac my House better than a Radiator.