AMD's Ryzen 9 9950X3D2 Dual Edition crams 208MB of cache into a single chip

Re:AMD's Ryzen 9 9950X3D2 Dual Edition crams 208MB of cache ... by mroche on Saturday March 28, 2026 @05:08AM (#47552899)

I'm looking at building a new system, and was waiting to see what happens with this chip and Intel's Arc Pro B70 card. I can't find ECC UDIMMs of 64GB per-stick to make 128GB, but I can put together two solo UDIMMs of 32GB or 48GB for $800 and $1000 per stick respectively.

I really want to see what enabling the L3 cache options in the BIOS do from a NUMA standpoint. I have some projects I want to work on where being able to even just simulate NUMA subdivisions would be highly useful.

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Re:AMD's Ryzen 9 9950X3D2 Dual Edition crams 208MB of cache ... by snvzz on Saturday March 28, 2026 @10:07AM (#47554768)

I was surprised to find that ECC modules available were 24 or 48, so 128GB with 2 sticks was impossible.

While I was aiming at 128, I settled for 96GB, because any more than 2 sticks means a sharp drop in RAM clocks this generation.

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