COMPATIBLE WITH: Mac Pro Quad-Core (Model ID: MacPro5,1) Mac Pro Quad-Core (Model ID: MacPro4,1) Mac Pro 6-Core (Model ID: MacPro4,1) Mac Pro 8-Core (Model ID: MacPro4,1) Xserve Quad-Core (Model ID Xserve 3,1) Xserve 8-core (Model ID Xserve 4,1).
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