AMD Ryzen 9 4900H vs AMD Ryzen 9 7940HX
AMD Ryzen 9 4900H
► remove from comparison
The AMD Ryzen 9 4900H is a mobile SoC for big laptops based on the Renoir architecture. At the time of announcement in March 2020 it is the fastest model of the 4000H series. The R9 4900H integrates all eight cores based on the Zen 2 microarchitecture. They are clocked at 3.3 (guaranteed base clock) to 4.4 GHz (Turbo) and support SMT / Hyperthreading (16 threads). 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
According to our information, the Ryzen 9 4900H is only slightly faster than the Ryzen 7 4800H. The CPU is clocked 400 MHz (base +14%) to 200 MHz (boost +5%) higher, but the gains greatly depend on the cooling and TDP settings. Compared to Intel chips, the i9-9980HK top model should be comparable. That means the Ryzen 9 4900H should be able to handle all demanding tasks and gaming.
In addition to the eight CPU cores, the APU also integrates a Radeon RX Vega 8 integrated graphics card with 8 CUs. The dual channel memory controller supports DDR4-3200 and energy efficient LPDDR4-4266 RAM. Furthermore, 12 MB level 3 cache can be found on the chip. See our hub page on the Renoir Processors for more information.
The TDP of the APU is specified at 45 Watt (default). That means the chip is intended for big and relatively heavy laptops.
AMD Ryzen 9 7940HX
► remove from comparison
The AMD Ryzen 9 7940HX is a high-end notebook processor from the Dragon Range series with 16 cores and hyperthreading (SMT), which means it can process up to 32 threads simultaneously. The CPU uses the current Zen 4 architecture for the 16 cores and clocks these from 2.4 GHz (base clock) up to 5.2 GHz (single-core boost). The CPU offers 16 MB L2 cache and 64 MB L3 cache (i.e. a total of 80 MB cache). The 7940HX consists of three chiplets, two CCD clusters with 8 CPU cores each made with a 5nm node (71mm²) and one IO die on 6nm (122mm²), are all manufactured at TSMC's fabs.
The performance of the Ryzen 9 should be comparable to a Core i9-13900HX (24 hybrid cores, max 5.4 GHz) in the top range of mobile processors from 2024. AMD itself advertises a clear lead over the old Ryzen 9 6900HX (8 Zen 3 cores, 4.9 GHz), which can be explained by the additional cores, improved architecture and higher frequencies. Compared to the top model, the Ryzen 9 7945HX, the 7940HX is slightly lower clocked.
The chip also integrates 4x USB 3.2 Gen2 (10 Gbps) ports (no USB 4), 28 PCIe 5.0 lanes (for GPUs and SSDs), a dual-channel DDR5-5200 memory controller and a small AMD Radeon 610M graphics card (2CUs, 400 - 2200 MHz).
The R9 7940HX is specified with 55 watts TDP and can be configured up to 75 watts (cTDP).
| Model | AMD Ryzen 9 4900H | AMD Ryzen 9 7940HX | ||||||||||||||||||||||||||||||||
| Codename | Renoir-H (Zen 2) | Dragon Range-HX (Zen 4) | ||||||||||||||||||||||||||||||||
| Series | AMD Renoir (Ryzen 4000 APU) | AMD Dragon Range (Zen 4, Ryzen 7X4X/8X4X) | ||||||||||||||||||||||||||||||||
| Series: Dragon Range (Zen 4, Ryzen 7X4X/8X4X) Dragon Range-HX (Zen 4) |
|
| ||||||||||||||||||||||||||||||||
| Clock | 3300 - 4400 MHz | 2400 - 5200 MHz | ||||||||||||||||||||||||||||||||
| L1 Cache | 512 KB | 1 MB | ||||||||||||||||||||||||||||||||
| L2 Cache | 4 MB | 16 MB | ||||||||||||||||||||||||||||||||
| L3 Cache | 8 MB | 64 MB | ||||||||||||||||||||||||||||||||
| Cores / Threads | 8 / 16 | 16 / 32 16 x 5.2 GHz AMD Zen 4 | ||||||||||||||||||||||||||||||||
| TDP | 45 Watt | 55 Watt | ||||||||||||||||||||||||||||||||
| Technology | 7 nm | 5 nm | ||||||||||||||||||||||||||||||||
| max. Temp. | 105 °C | 100 °C | ||||||||||||||||||||||||||||||||
| Socket | FP6 | FL1 | ||||||||||||||||||||||||||||||||
| Features | DDR4-3200/LPDDR4-4266 RAM, PCIe 3, MMX (+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A, AES, AVX, AVX2, FMA, SHA | DDR5-5200 RAM, PCIe 5, MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME | ||||||||||||||||||||||||||||||||
| iGPU | AMD Radeon RX Vega 8 (Ryzen 4000/5000) ( - 1750 MHz) | AMD Radeon 610M (400 - 2200 MHz) | ||||||||||||||||||||||||||||||||
| Architecture | x86 | x86 | ||||||||||||||||||||||||||||||||
| Announced | ||||||||||||||||||||||||||||||||||
| Manufacturer | www.amd.com | www.amd.com | ||||||||||||||||||||||||||||||||
| Transistors | 9900 Million |
Benchmarks
Average Benchmarks AMD Ryzen 9 4900H → 100% n=5
Average Benchmarks AMD Ryzen 9 7940HX → 198% n=5
- Average benchmark values for this graphics card* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation
