Especially single threaded performance should be very good thanks to the new Zen 4 cores and relatively high clock speeds. The performance of the R5 7645HX should be significantly higher than the fastest 6-core CPU of the Ryzen 6000 mobile series the Ryzen 5 6600H. The cores clock from 4 (base) up to 5 GHz (single core boost). It offers 6 cores based on the Zen 4 architecture that supports hyperthreading (12 threads). The AMD Ryzen 5 7645HX is a fast high-end laptop processor of the Dragon Range series. That means the chip is intended for thin and light laptops (but with fans).ĪMD Ryzen 5 7645HX ► remove from comparison The TDP of the APU is specified at 15 Watt (default) and can be configured from 10 to 25 Watt by the laptop vendor. See our hub page on the Renoir Processors for more information. Furthermore, 8 MB level 3 cache can be found on the chip. The dual channel memory controller supports DDR4-3200 and energy efficient LPDDR4-4266 RAM. In addition to the eight CPU cores, the APU also integrates a Radeon RX Vega 8 integrated graphics card with 8 CUs and up to 1750 MHz.
The sustained performance however ist strongly depending on the cooling system and the TDP settings of the laptop. This means the CPU should be one of the fastest processors in the 15 Watt TDP range and well suited for demanding tasks. Compared to the similar named Ryzen 7 4800H, the 4800U offers a lower TDP (15 versus 45 Watt) and base clock (1.8 versus 2.9 GHz).Īccording to AMD, the Ryzen 7 4800U is 4% faster in Cinebench R20 single thread test and 90 % faster in the multithreaded test compared to the fast Intel Core i7-1065G7 (Ice Lake, 4 cores, 3.9 GHz). The chip is manufactured in the modern 7 nm process at TSMC and partly thanks to it AMD advertises a 2x improved performance per Watt for the Renoir chips. They are clocked at 1.8 (guaranteed base clock) to 4.2 GHz (Turbo) and support SMT / Hyperthreading (16 threads). The 4800U integrates all eight cores based on the Zen 2 microarchitecture. The AMD Ryzen 7 4800U is a processor for thin and light laptops based on the Renoir architecture. AMD Ryzen 7 4800U ► remove from comparison
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