Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

mac pro cpu upgrade

  1. A

    MP 1,1-5,1 MacPro 4,1 dual processor upgrade problem x5680 CPU’s

    Hello, I am hoping someone can help as this problem has me scratching my head. I have a dual processor Mac Pro 4,1 that originally had dual e5520 CPU’s. I have updated the firmware (and rom) to make it a 5,1. I have installed two de-lidded x5680 CPU’s. System booted up fine with original dual...