this post was submitted on 24 Nov 2023
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The 7540U is a 28W Zen 4 part. If the 8520U exists it will be a 15W Zen 2 part.
At the 15W and below TDP range performance won't actually be as far apart as you would think, you can see this with steam deck vs rog ally performance at 15W or lower TDPs.
The way to think about it is that there is the 20, 30, 40, and 50 series with bigger being better and within each series you have the model year (7/8/9 etc) and the tier of each part in the series.
For example, which TV is better. S95B or the S90C or the QN95C or the S95C?
Bigger problem than any that has been mentioned is that there is now 45 series that is desktop cpus on laptops. So I really hope they will stick to HX being just for that category or it will be a mess. :p