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What if AMD FX had "real" cores? [video]

https://www.youtube.com/watch?v=Lb4FDtAwnqU
12•zdw•3d ago

Comments

stn8188•1h ago
That was a neat video, I wasn't aware of the FX architecture in that detail. I loved my FX series... I had a 6300 that got me through engineering school, and now the same basic desktop serves as my kids' gaming computer (though I was able to upgrade to a cheap 8350). It definitely still holds it's own with the older games that I let the kids play!
magicalhippo•1h ago
I'm a bit curious why this couldn't have been covered earlier by simply having the OS disable some cores on a 4-module 8-thread part. After all the video does point out that if only one thread uses one module, it as full access to all the resources of the module.

Also, the benchmark is clock-for-clock, so while the older Phenom II looks like it's ahead, the Buldozer should be able to go faster still.

All that said, I really enjoyed this retrospective look.

Yizahi•51m ago
They were real though. How many ALU were there on say FX-8350? 8 ALUs. How many FPUs were there? 8 FPU each 128 bit wide. What alternative definition of core whis doesn't satisfy? CPU was underperforming at that time and Intel fans were trying to equate their Hyperthreading with AMDs core organization, but they were always real cores.
dragontamer•22m ago
8 Integer ALUs, 4 Vector FPUs, 8x L1 d-caches but only 4x L2 d-Caches.

And perhaps most importantly: 4x decoders/4x L1 iCache. IIRC, the entire damn chip was decoder-bound.

--------

Note: AMD Zen has 4x Integer pipelines and 4x FPU pipelines __PER CORE__. Modern high-performance systems CANNOT have a single 2x-pipeline FPU shared between two cores (averaging one pipeline per core). Modern Zen is closer to 4x pipelines per core, maybe more depending on how you count load/store units.

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What if AMD FX had "real" cores? [video]

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