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This is my worklog documenting the PS2 motherboard for completeness and hype. I've had a board running on custom regulators for a little while now and the voltage documentation is in a good state. However, I have a few more tests to do before actually trimming a board including measuring current on each individual voltage reg, and video stuff.
I've compiled a 79001 compendium and a lot of work has been done on it to figure out the motherboard. It's such a valuable tool that even without having done any trimming, I am pretty confident on how small it can be made.
Voltage layer peek:
Voltage data:
Conditions:
Stock PS2 79001 (No disc drive)
8.5v Power Supply
Free McBoot Memory card
Lexar 64gb USB drive
DS2 controller
Composite Video
PS2 Menu:
Power Supply: 8.7190 V
Total Current: ~1.033 A
Onboard Regulators:
3.4635 V 271.7kHz (Top side)
1.23156 V 277.8kHz (Top side)
2.5091 V (Top side by power plug)
1.72072 V (Top side)
4.9888 V (Top side by 8pin dac)
4.9873 V (Top side USB)
2.5267 V (Bottom side by Controller 1)
1.81214 V (Bottom side by Controller 2)
5.0110 V (Bottom side USB)
1.79425 V (Bottom side near video encoder)
3.5167 V (Bottom side near video encoder)
In Game (GTA3)
Power Supply: 8.70 V
Total Current: ~1.07-1.1 A
Conditions:
PS2 79001 Custom Regulators (No disc drive)
8.5v Power Supply
Free McBoot Memory card
Lexar 64gb USB drive
DS2 controller
Composite Video
Disc drive laser and motor ICs removed, all onboard regulators removed
PS2 Menu:
Power Supply: 8.6820 V
Total Current: ~0.902 A
Custom Regulators used:
PTH08080:
3.5422 V
1.22585 V
2.5480 V
5.0435 V
1.79770 V
Original 8 pin regulator powered from 3.5 V PTH08080:
1.68171 V
In Game (GTA3)
Power Supply: 8.6820 V
Total Current: ~0.9-0.97 A
Conclusions:
Stock PS2 Power Consumption: ~9.57 Watts (In Game)
Custom regulator PS2 Power Consumption: ~8.42 Watts (In Game)
Stock PS2 uses ~1.15 Watts more than modified motherboard
Number of Regulators:
Stock PS2: 11 voltage regulators
Modified PS2: 6 voltage regulators (As of now)
I've compiled a 79001 compendium and a lot of work has been done on it to figure out the motherboard. It's such a valuable tool that even without having done any trimming, I am pretty confident on how small it can be made.
Voltage layer peek:
Voltage data:
Conditions:
Stock PS2 79001 (No disc drive)
8.5v Power Supply
Free McBoot Memory card
Lexar 64gb USB drive
DS2 controller
Composite Video
PS2 Menu:
Power Supply: 8.7190 V
Total Current: ~1.033 A
Onboard Regulators:
3.4635 V 271.7kHz (Top side)
1.23156 V 277.8kHz (Top side)
2.5091 V (Top side by power plug)
1.72072 V (Top side)
4.9888 V (Top side by 8pin dac)
4.9873 V (Top side USB)
2.5267 V (Bottom side by Controller 1)
1.81214 V (Bottom side by Controller 2)
5.0110 V (Bottom side USB)
1.79425 V (Bottom side near video encoder)
3.5167 V (Bottom side near video encoder)
In Game (GTA3)
Power Supply: 8.70 V
Total Current: ~1.07-1.1 A
Conditions:
PS2 79001 Custom Regulators (No disc drive)
8.5v Power Supply
Free McBoot Memory card
Lexar 64gb USB drive
DS2 controller
Composite Video
Disc drive laser and motor ICs removed, all onboard regulators removed
PS2 Menu:
Power Supply: 8.6820 V
Total Current: ~0.902 A
Custom Regulators used:
PTH08080:
3.5422 V
1.22585 V
2.5480 V
5.0435 V
1.79770 V
Original 8 pin regulator powered from 3.5 V PTH08080:
1.68171 V
In Game (GTA3)
Power Supply: 8.6820 V
Total Current: ~0.9-0.97 A
Conclusions:
Stock PS2 Power Consumption: ~9.57 Watts (In Game)
Custom regulator PS2 Power Consumption: ~8.42 Watts (In Game)
Stock PS2 uses ~1.15 Watts more than modified motherboard
Number of Regulators:
Stock PS2: 11 voltage regulators
Modified PS2: 6 voltage regulators (As of now)
Last edited: