3D transforms is nearly completely dependent on the GPU of your machine. about:gpu in Chrome will give you more information about the differences and capabilities of your machine. In some cases, old drivers are too unstable to support and so they're blacklisted by Chrome.
Gah this helped me a lot, thanks. about:gpu told me my WebGL was disabled in about:flags... which it was. Not sure how that happened as that's been annoying me forever.
