AMD Ryzen 9 7945HX3D

The AMD Ryzen 9 7945HX3D is a fast high-end laptop processor of the Dragon Range series. It offers 16 cores based on the Zen 4 architecture that supports hyperthreading (32 threads). The cores clock from 2.3 (base) up to 5.4 GHz (single core boost). Compared to the similar R9 7945HX, the 7945HX3D offers an additional 64 MB 3D V-Cache on one CCD-Cluster. This helps in some workloads that can use the additional fast cache (e.g. some games). The guaranteed base clock however was reduced from 2.5 to 2.3 GHz.

The performance of the R9 7945HX3D is similar to the R9 7945HX in workloads that wont make use of the bigger L3 cache. Most games however can use the additional memory. AMD e.g. was advertising the HX3D with 4% to 53% higher performance in 1080p high settings.

The Dragon Range series still uses a chiplet design with two CCD-clusters (each with 8 possible cores) in 5nm and an IO-die (including the memory controller and the Radeon 610M iGPU) in 6nm. The chip integrates 4x USB 3.2 Gen2 (10 Gbps) ports (no USB4), 28 PCIe 5.0 lanes (for GPU and SSDs) and a dual-channel DDR5-5200 memory controller.

The R9 7945HX3D is rated at a TDP of 55 Watt and can be configured up to 75 Watt (cTDP).

Codename	Dragon Range-HX (Zen 4)
Series	AMD Dragon Range
Series: Dragon Range Dragon Range-HX (Zen 4) AMD Ryzen 9 7945HX3D « 2.3 - 5.4 GHz 16 / 32  128 MB L3 AMD Ryzen 9 7945HX 2.5 - 5.4 GHz 16 / 32  64 MB L3 AMD Ryzen 9 7940HX 2.4 - 5.2 GHz 16 / 32  64 MB L3 AMD Ryzen 9 7845HX 3 - 5.2 GHz 12 / 24  64 MB L3 AMD Ryzen 9 7840HX 2.9 - 5.1 GHz 12 / 24  64 MB L3
Clock Rate	2300 - 5400 MHz
Level 1 Cache	1 MB
Level 2 Cache	16 MB
Level 3 Cache	128 MB
Number of Cores / Threads	16 / 32 16 x 5.4 GHz AMD Zen 4
Power Consumption (TDP = Thermal Design Power)	55 Watt
Manufacturing Technology	5 nm
Max. Temperature	89 °C
Socket	FL1
GPU	AMD Radeon 610M (400 - 2200 MHz)
64 Bit	64 Bit support
Architecture	x86
Announcement Date	07/28/2023
Product Link (external)	www.amd.com

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