This is essentially same as the 3990x but with more max ram capability. Taken from working Lenovo P620. Works only in Lenovo P620 as Lenovo threadripper CPUs are bios locked to Lenovo only. Makes a great upgrade for either P620 with low end 3000 or 5000 series cpu already installed. Fast dispatch. Please message before checkout to confirm genuine purchase thanks Serials ending in 09 and 91 and
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