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AMD Introduces Smaller Zen 4c CPU Cores in Latest Ryzen 7040U Mobile Chips

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AMD has released its latest mobile chips, the Ryzen 5 7545U and Ryzen 3 7440U, which are the first laptop processors to feature AMD’s new Zen 4c CPU cores. These cores were previously seen in the EPYC server chips and the entry-level AMD Ryzen Z1 chip for handheld gaming PCs. The Zen 4c cores offer most of the same features as Zen 4 cores but take up less space and run at lower speeds. AMD claims that the Zen 4c cores take up 35% less physical space than Zen 4, allowing for more cores in the same amount of space or the same number of cores in a smaller space.

The Ryzen 5 7545U and Ryzen 3 7440U chips replace the previous Ryzen 5 7540U and Ryzen 3 7440U Phoenix chips. The new chips still have the same number of CPU cores (6 for Ryzen 5 and 4 for Ryzen 3), but now some of those cores are Zen 4c chips, which should bring efficiency improvements and similar performance at lower power levels. The top speeds for the Zen 4c cores are not known, but they are estimated to be about 30% slower than Zen 4 cores.

The updated Ryzen 7040U lineup includes the following chips:

  • Ryzen 7 7840U: 8 x Zen 4 cores, 8 / 16 cores / threads, 3.3 GHz / 5.1 GHz base / boost CPU frequency, 24MB cache, Radeon 780M graphics, DDR5 / LPDDR5 RAM, USB4 support, 15-30W TDP.
  • Ryzen 5 7640U: 6 x Zen 4 cores, 6 / 12 cores / threads, 3.5 GHz / 4.9 GHz base / boost CPU frequency, 22MB cache, Radeon 760M graphics, DDR5 / LPDDR5 RAM, USB4 support, 15-30W TDP.
  • Ryzen 5 7540U: 6 x Zen 4 cores, 6 / 12 cores / threads, 3.2 GHz / 4.9 GHz base / boost CPU frequency, 22MB cache, Radeon 740M graphics, DDR5 / LPDDR5 RAM, USB4 support, 15-30W TDP.
  • Ryzen 5 7545U: 2 x Zen 4 cores, 4 x Zen 4c cores, 6 / 12 cores / threads, 3.2 GHz / 4.9 GHz base / boost CPU frequency, 22MB cache, Radeon 740M graphics, DDR5 / LPDDR5 RAM, USB4 support, 15-30W TDP.
  • Ryzen 3 7440U (old): 4 x Zen 4 cores, 4 / 8 cores / threads, 3 GHz / 4.7 GHz base / boost CPU frequency, 12MB cache, Radeon 740M graphics, DDR5 / LPDDR5 RAM, USB4 support, 15-30W TDP.
  • Ryzen 3 7440U (new): 1 x Zen 4 core, 3 x Zen 4c cores, 4 / 8 cores / threads, 3 GHz / 4.7 GHz base / boost CPU frequency, 12MB cache, Radeon 740M graphics, DDR5 / LPDDR5 RAM, USB4 support, 15-30W TDP.

Source: Liliputing.

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