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I picked up a set of 5 of these cards from an eBay purchase. When they were new, they were touted as being an upgradable upgrade for the older PCI based PowerMacintosh series (PM7300 to PM9600) and some clones from that era.

 

After removing the clip-on heatsink, the ZIF (Zero Insertion Force) CPU could be swapped out with a faster G3 or even a G4 ZIF upgrade. Peep the picts at left, it's a pretty dandy card!

 

Received with no documentation. A net search of the dip-switch settings (eight switches total) was a dead end. Time to decode these suckers. My findings with the following CPU's...

 

1. 300Mhz G3 CPU that came with the card
2. 400Mhz G3 CPU from a Blue and White PowerMac
3. 500Mhz G3 SonnetTech ZIF CPU

 

This card was tested on a PowerMac 9600 running MacOS 9.1. Your milage may vary.

 

The drivers for CPU Director are getting harder to locate. Below are 3 versions of it plus a MAXpowr driver. Either Save File or extract directly into your downloads.

 

Official site at PowerLogics for legacy drivers support here.

 

CPU Director 2.1b1.sit here [ 2.0b4.sitx here ] [ 1.5f6.sit here ]

 

MAXpowr 2.0.5 Installer.sit here

 

Good Luck!

To start, you'll need to set your systems BUS speed. For PowerMacs it's usually 40, 45 or 50MHz. Locate the DIP switches located in the upper left corner of the card. Switch 1 is closest to the ZIF socket (left in image below) and 8 is on the other end. Use the following chart to set your DIP switches for BUS speed. Depending on what this is set to, the other switches (which act as a multiplier) will change what speed your CPU is funning at. A switch is considered ON if it's flipped towards the circuit board (down).

BUS SPEED

SW-1

SW-2

SW-3

40MHz

ON

ON

ON

43MHz

OFF

ON

ON

45MHz

ON

OFF

ON

47MHz

OFF

OFF

ON

50MHz

ON

ON

OFF

53MHz

OFF

ON

OFF

55MHz

ON

OFF

OFF

57MHz

OFF

OFF

OFF

UNSTABLE

This first chart is the CPU that came with the card. Nothing fancy. More info to come.

40 MHZ BUS

43 MHZ BUS

45 MHZ BUS

47 MHZ BUS

50 MHZ BUS

[ASPF/CPUD]

[ASPF/CPUD]

[ASPF/CPUD]

[ASPF/CPUD]

[ASPF/CPUD]

SW-4

SW-5

SW-6

SW-7

>>>>>

>>>>>

>>>>>

>>>>>

>>>>>

INVALID

???*/425**

???*/450**

130*/467**

139*/500**

ON

OFF

OFF

ON

133/120

142/128

150/135

156/140

166/150

OFF

ON

ON

ON

156/140

166/149

175/158

182/163

195/175

OFF

OFF

OFF

ON

178/160

190/170

200/180

208/187

200/200

OFF

ON

OFF

ON

200/180

213/191

200/203

212/210

225/225

ON

OFF

OFF

OFF

200/200

215/213

225/225

233/233

250/250

OFF

ON

OFF

OFF

220/220

237/234

250/248

259/257

275/275

OFF

ON

ON

OFF

240/240

258/255

270/270

282/280

300/300

OFF

OFF

ON

OFF

260/260

280/276

293/293

306/303

****

ON

OFF

ON

OFF

280/280

300/298

***/315

****

****

ON

ON

OFF

ON

333/300

*****

****

****

****

ON

ON

ON

OFF

UNKNOWN SWITCH SPEEDS

ASPF: Apple System Profiler - Apple's built-in "system info" app. This is the value before the "/". In MHz.

 

CPUD: CPU Director - Part of the PowerLogix extension install. This is value after the "/" & is true CPU speed. In MHz.

 

SW-8 appears to do nothing to BUS or CPU speed with this ZIF. Ignore this dip switch for now. (Faster than 400Mhz?)

SW-4

SW-5

SW-6

SW-7

OFF

OFF

OFF

OFF

OFF

OFF

ON

ON

ON

OFF

ON

ON

ON

ON

OFF

OFF

ON

ON

ON

ON

I then tested the Z-Force with a stock 400MHz ZIF from a Blue and White G3. Below are some results, but I only did the later 1/2 of the chart. Also note that the 45MHz BUS went way up in reported speeds (in bold below). The MHz rating should relatively fall between the 43 and 47Mhz speeds respectivly. This is unknown why it reported this way, It did seemed stable tho.

 

Also note that the last line is a new set of previously unknown switch setting multiplier. Additionally, there is no staircased set of non-boots at higher BUS settings that did work at lower speeds as in the first big chart (denoted by ****).

 

The remailing 4 SW-4 to SW-7 switch settings are still that, unknown. =)

40 MHZ BUS

43 MHZ BUS

45 MHZ BUS

47 MHZ BUS

50 MHZ BUS

[ASPF/CPUD]

[ASPF/CPUD]

[ASPF/CPUD]

[ASPF/CPUD]

[ASPF/CPUD]

SW-4

SW-5

SW-6

SW-7

>>>>>

>>>>>

>>>>>

>>>>>

>>>>>

220/220

237/234

292/289

259/289

275/275

OFF

ON

ON

OFF

240/240

258/255

318/315

282/280

300/300

OFF

OFF

ON

OFF

260/260

280/276

345/341

306/303

325/325

ON

OFF

ON

OFF

280/280

300/298

371/367

319/326

350/350

ON

ON

OFF

ON

333/300

355/319

438/394

389/350

417/375

ON

ON

ON

OFF

333/300

379/340

466/420

415/373

445/400

OFF

OFF

ON

ON

This time I picked up a SonnetTech CPU. The results were way different than expected. It appears that the multiplier is fixed and the speed is dictated by the BUS speed. Also note higher BUS speeds were attained.

 

Note that the CPUD speed was obtained as it appeared at the startup splash screen although the OS would freeze as soon as the desktop would appear.

40 MHZ BUS

43 MHZ BUS

45 MHZ BUS

47 MHZ BUS

50 MHZ BUS

53 MHZ BUS

55 MHZ BUS

[ASPF/CPUD]

[ASPF/CPUD]

[ASPF/CPUD]

[ASPF/CPUD]

[ASPF/CPUD]

[ASPF/CPUD]

[ASPF/CPUD]

SW4->7

>>>>>

>>>>>

>>>>>

>>>>>

>>>>>

>>>>>

>>>>>

445/400

475/425

500/450

519/467

556/500

585/525

???/550

ANY

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