Normally AMD’s Ryzen 5 5600X and Ryzen 7 5800X are made up of one Zen 3-the (aka ccd) plus the I / Othe. Yuri Bubily (1usmus) and Igor Wallossek from Igor’s Lab have found out that there are also models in the wild that have a second ccd on board.
Bubily discovered while working on his Clock Tuner for Ryzen tool: a Ryzen 5 5600X he was testing also turned out to be a second the to have. Interestingly enough, this second ccd could also be read, even though it cannot be used. The second chiplet appears permanently in Deep Sleep Mode to be. That in itself makes sense, but occasionally something seemed to happen with it, because the clock speed read increased to 550 MHz.
Presumably, the Ryzen 5 in question was originally a Ryzen 9 5900X, of which one of the two 6-core chiplets was not working properly. Given the still somewhat scarce availability of the Ryzen 5000 CPUs, it is not surprising that AMD still sells such a chip. What is interesting is that the second the does not seem completely disabled. There may be a way to unlock the remaining cores, similar to what one could do with certain Phenom II processors, for example.
Bubily and Wallossek indicate that the next version of CTR will have support for detecting “dormant” CCDs. It will probably be released around the end of this month.
Source: Igor’s Lab
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Source: Hardware Info Compleet by nl.hardware.info.
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