From: menes@statistik.tu-muenchen.de (Rainer Menes) Subject: Re: Quadra clock chip - followup Keywords: quadra,clock,oscillator Originator: menes@suniams2.statistik.tu-muenchen.de Organization: Technische Universitaet Muenchen, Germany Lines: 87 I have replaced the osz to 66 MHz yesterday and no truble at all. My Quadra now works at 33 MHz stable for more than 14 hours. I have also tried a 70 MHz osz, but after 1/2 hour my Quadra 700 died. I am not sure what was the reason for that, but it is to risky to run it to fast. Most of your Quadras 700 should work at 33 MHz without any problems. But a safety tip do a backup from your harddisk befor you start to upgrade. During my 35 MHz test I damaged my harddisk and had a hardtime to get it working again. So once again do a backup befor you start!!!!!!!!! Now the speedometer results after replacing the osz. Speedometer Report for menes rainer. Prepared April 22, 1993. Machine Record Version #: 5 User Comment: Quadra 700 33Mhz and Ram Disk 20 MByte RAM + 2 MByte VRAM System Information: Computer: Mac Quadra 700 CPU: MC68040 FPU: Integral FPU MMU: Integral MMU Color Quickdraw: 2.30 (32 Bit QD) System Version: 7.1.6 Finder Version: D1-7.1 AppleTalk Version: 57 LaserWriter Version: D1-7.1.2 Laser Prep Version: Not Found ImageWriter Version: D1-7.0.1 ROM Version: $067C ROM Size: 1024 Bit Depth: 1 Horizontal DPI: 72 Vertical DPI: 72 Primary Screen Size: 832 x 624 Physical RAM: 20480K Logical RAM: 20454K P.R. Results (Uses Mac Classic as 1.0): CPU: 21.625 Graphics: 30.052 Disk: 28.351 Name of Hard Disk tested: RAM Disk Math: 135.128 Performance Rating (PR): 36.848 Benchmark Results (Uses Mac Classic as 1.0): KWhetstones: 1500.000 205.479 Dhrystones: 26315.789 27.008 Towers: 24.960 QuickSort: 22.391 Bubble Sort: 23.823 Queens: 24.105 Puzzle: 28.804 Permutations: 26.523 Fast Fourier: 167.728 F.P. Matrix Multiply: 154.452 Integer Matrix Multiply: 30.250 Sieve: 25.602 Benchmark Average: 63.427 FPU Tests (Uses Mac II as 1.0): @@FFPU Fast Fourier: 14.636 FPU KWhetstones: 5454.545 7.636 FPU F.P. Matrix Mult.: 14.333 FPU Test Average: 12.202 Color Tests (Uses Mac II as 1.0): Black & White: 6.395 4 Colors: 6.773 16 Colors: 6.957 256 Colors: 7.016 Color Test Average: 6.785 Very interesting are the graphics results (Graphics 30.052) couldn't belief this, but it is true. Two points which my cause problems are the 4 MByte Ram solder on the board. The are only 80ns Rams and run at the upperlimit with 33 MHz. The next part which may cause trouble are the Video Rams. I have the orignal 100ns VRAMs from Apple in my Quadra, here you are also at the upperlimit where most of the chips running but it isn't garantied to run. Most of the other parts on the Quadra board running on there o wn clockspeed so they wont make truble. The most importaned question is do I neat a new heat sink. I would say NO. After running my Quadra for more than 14 hours the heat sink is really cool. A 33 MHz 486 with heat sink is mutch warmer than the 68040 in the Quadra, so I didn't see any problems. The room temperatur was 22 Celsius (72 F). If you living in a area were it is hot 100 F (45 C) and your room temperatur is not mutch below I would suggest a new heat sink with a ventilator to stay on the safe side. Hope you will have the same success than I had, Rainer email: menes@statistik.tu-muenchen.de