Interex Europe and Newer Technology both followed Apple’s Seybold keynote by announcing plans to ship G4 upgrade products for "beige" G3s.

Interex announced the XLR8 MACh Carrier G4, which replaces the existing CPU and is upgradeable by swapping its ZIF daughtercard for faster speeds, and the MACh Speed G4Z for beige G3 systems, which replaces the standard G3 ZIF daughtercard.

Interex also updated its XLR8 MACh Speed Control software to version 1.4, adding AltiVec and G4 compatibility, full support for G3 PowerBooks and upgrades, a low-power cache mode, a motherboard cache switch and AltiVec enhanced PowerPack software tools. The software is downloadable now, free for XLR8 customers. The upgrades are "being prepared for manufacture".

Newer Technology said it would offer MAXpowr G4 upgrades in the autumn. Testing so far shows that the G4 upgrade works with the 7300, 7500, 7600, 8500, 8600, 9500 and 9600, Power Computing PowerTower Pro and Power PowerWave, UMAX Pulsar and beige Power Mac G3s.

Newer said that the most recent Apple ROM update issued for blue & white Power Mac G3s has rendered them incapable of using G4 upgrades, but this could change as ROM updates are issued frequently. Interex said that additional AltiVec performance software with blue & white compatibility is "being finalised in the labs".