AMD銳龍5 7600X驚現雙CCD，想玩開核的DIY用戶福利

來源：WCCF Tech

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AMD銳龍7000處理器的頂蓋下，採用的依然是CCD+I/O Die的組合，其中銳龍9採用雙CCD，從而開啓最多16核。

不過最近TechTuber發現，部分銳龍5 7600X居然也集成了兩組CCD計算單元，AMD再一次“廢物利用”。實際上，對於這件事AMD並不避諱，強調這是爲了生產效率最大化，上一代銳龍7 5800X和銳龍5 5600X的部分型號中，也有兩組CCD，不過只有一組啓用而已。

這相當於被屏蔽掉的那組應該是生產中發現有缺陷的部分，直接報廢太可惜，索性做成激活一組好CCD的型號。

至於有硬件黑客因此有搞“開核”的想法，AMD稱，另一組CCD在工廠就被永久熔斷，以保證它的存在不會造成額外延遲，而且Zen3那一代沒人成功過，Zen4就看有沒有人想試試。

另外，理論上講這種雙CCD的8核/6核甚至4核銳龍散熱會略強點，被屏蔽的那一組CCD可以更好傳到熱量，比任何硅脂或者液金都好用。

AMD's Ryzen 7000 Desktop CPUs come in two flavors, one with a single CCD design and the higher core count variants with dual Zen 4 CCDs. However, it looks like AMD might be shipping some AM5 Ryzen 5 & Ryzen 7 chips with two CCDs. Recently, Der8auer posted a video showcasing his latest Delid Die Mate which can be used to delid the AMD Ryzen 7000 Desktop CPUs if you plan on using direct-die cooling. The overclocker used a Thermal Grizzly Direct Die Frame for this demonstration but upon delidding the Ryzen 5 7600X, an interesting discovery was made. As soon as the AMD Ryzen 5 7600X CPU was delidded, Der8auer noticed that it featured two Zen 4 CCDs instead of one. The 7600X features 6 cores and 12 threads so it doesn't need the extra CCD. All AMD Ryzen 7000 CPUs below the Ryzen 9 segment make use of a single CCD so it's definitely a bit interesting to see a dual Zen 4 CCD implementation on the PCB. Since the chip was already delidded, Der8auer put the chip under a thermal probe and checked to see if the other Zen 4 CCD was active or not. Three tiny copper blocks were used that say on each chiplet (two Zen 4 CCDs and a single IOD). When booted, only the IO die, & a single Zen 4 CCD was shown to be active since they started producing heat. This means that the other die is not running. So that brings us to the question as to why there are two Zen 4 CCDs on this particular AMD Ryzen 5 7600X CPU. There could be two reasons, first and foremost, AMD may simply be using defective Ryzen 9 chips that only have one working Zen 4 CCD and labeling them as Ryzen 5 & Ryzen 7 parts. This would suggest that the other die is totally defective and not usable. But there is also a small possibility that this die could've been artificially locked and there might be a bypass to enable it. It is known that AMD locks several features of its chips artificially such as the Ryzen 7 5800X3D OC that would soon be overcome. But actually enabling a whole CCD won't be as simple as it looks & even if this was a functional die, it would take someone with a lot of experience to bypass this. Nevertheless, it is interesting to see AMD shipping dual Zen 4 CCDs on some of its Ryzen 7 and Ryzen 5 chips. There could be a lot more chips out there but unless you are delidding them (an actual risk that voids the warranty), you'll never know what lies under the hood of your CPU.