Power Macintosh G3 (Blue and White) upgrades

A blue-and-white PowerPC G3 tower with PCI expansion, USB, FireWire, ADB, Ethernet, and an ATX-derived power interface.

Also called: Power Mac G3 B&W, Yosemite G3

At a glance

Introduced: 1999

Products listed: 2

Exact-model evidence: 2

Family/interface evidence: 0

Upgrade types: 2

Vintage searches: 0

Upgrade directory: G3 Blue and White

Browse everything below, or filter by product type, availability, and compatibility basis. Notes explain whether evidence names an exact target, a broader family, or only the relevant bus or interface for this computer.

Showing 2 products.

StatusProductWhat it doesLinks
AvailableChecked Jul 24, 2026ATX2G3 Conversion Cableby Infinity Products
atxpower supplyreplacement part

Adapts a modern 24-pin ATX power supply to selected Power Macintosh G3 and PCI Graphics G4 towers.

For this system (exact model): Designed for the Blue and White G3 tower, with case-fan wiring already installed. Disconnect mains power and verify the complete conversion procedure before connecting the logic board.

The current product page listed the cable without an out-of-stock marker on 2026-07-24. No ATX power supply or other conversion hardware is included.

Sources
ATX2G3 Conversion Cable product page
AvailableChecked Jul 24, 2026Radeon 7000 PCI Mac ROM Conversionby ATI and Infinity Products
pcigraphics cardvideo outputfirmwaresoldering

Converts selected PC Radeon 7000 PCI graphics cards for classic Mac use with a Mac ROM v226 image.

For this system (exact model): The Blue and White G3 is explicitly supported. Mac OS 9.0.4 through 9.2.2 and Mac OS X 10.1 through 10.4 are listed; 3D and Quartz Extreme need additional period software.

The pre-flashed ROM chip and a limited set of converted used 64 MB cards were listed without an out-of-stock marker on 2026-07-24. The ROM-chip product does not include a graphics card.

Sources
Pre-flashed Radeon 7000 Mac ROMConverted used Radeon 7000 cards