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AMD Ryzen 9 7940HX vs AMD Ryzen 9 7840HX

AMD Ryzen 9 7940HX

► remove from comparison AMD R9 7945HX

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 in 5nm (71mm²) and one IO die in 6nm (122mm²) which are all manufactured at TSMC.

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).

AMD Ryzen 9 7840HX

► remove from comparison AMD R9 7840HX

The AMD Ryzen 9 7840HX is a high-end notebook processorfrom the Dragon Range series with 12 cores and hyperthreading (SMT), which means it can process up to 24 threads simultaneously. The CPU uses the current Zen 4 architecture for the 12 cores and clocks these from 2.9 GHz (base clock) up to 5.1 GHz (single-core boost). The CPU offers 12 MB L2 cache and 64 MB L3 cache (i.e. a total of 76 MB cache). The 7840X consists of three chiplets, two CCD clusters with a maximum of 8 CPU cores in 5nm (71mm²) and one IO die in 6nm (122mm²) which are all manufactured at TSMC.

The performance of the Ryzen 9 should be significantly faster than the old Ryzen 9 6980HX (top model Rembrandt H, 8 cores, max 5 GHz). This is achieved by the additional cores, higher clock rate and improved architecture. Compared to the one year older Ryzen 9 7845HX, the 7840HX is clocked 100 MHz lower.

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 7840HX is specified with 55 watts TDP and can be configured from 45 to 75 watts (cTDP).

show full text
ModelAMD Ryzen 9 7940HXAMD Ryzen 9 7840HX
SeriesAMD Dragon Range (Zen 4, Ryzen 7045)AMD Dragon Range (Zen 4, Ryzen 7045)
CodenameDragon Range-HX (Zen 4)Dragon Range-HX (Zen 4)
Series: Dragon Range (Zen 4, Ryzen 7045) Dragon Range-HX (Zen 4)
AMD Ryzen 9 7945HX3D compare2.3 - 5.4 GHz16 / 32 cores128 MB L3
AMD Ryzen 9 7945HX compare2.5 - 5.4 GHz16 / 32 cores64 MB L3
AMD Ryzen 9 7940HX « 2.4 - 5.2 GHz16 / 32 cores64 MB L3
AMD Ryzen 9 7845HX compare3 - 5.2 GHz12 / 24 cores64 MB L3
AMD Ryzen 9 7840HX2.9 - 5.1 GHz12 / 24 cores64 MB L3
AMD Ryzen 9 7945HX3D compare2.3 - 5.4 GHz16 / 32 cores128 MB L3
AMD Ryzen 9 7945HX compare2.5 - 5.4 GHz16 / 32 cores64 MB L3
AMD Ryzen 9 7940HX2.4 - 5.2 GHz16 / 32 cores64 MB L3
AMD Ryzen 9 7845HX compare3 - 5.2 GHz12 / 24 cores64 MB L3
AMD Ryzen 9 7840HX « 2.9 - 5.1 GHz12 / 24 cores64 MB L3
Clock2400 - 5200 MHz2900 - 5100 MHz
L1 Cache1 MB768 KB
L2 Cache16 MB12 MB
L3 Cache64 MB64 MB
Cores / Threads16 / 32
16 x 5.2 GHz AMD Zen 4		12 / 24
12 x 5.1 GHz AMD Zen 4
TDP55 Watt55 Watt
Transistors9900 Million9900 Million
Technology5 nm5 nm
max. Temp.100 °C100 °C
SocketFL1FL1
FeaturesDDR5-5200 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, SMEDDR5-5200 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
iGPUAMD Radeon 610M (400 - 2200 MHz)AMD Radeon 610M (400 - 2200 MHz)
Architecturex86x86
Announced
Manufacturerwww.amd.comwww.amd.com

Benchmarks

Geekbench 6.2 - Geekbench 6.2 Single-Core
2751 Points (84%)
Geekbench 6.2 - Geekbench 6.2 Multi-Core
16094 Points (63%)

Average Benchmarks AMD Ryzen 9 7940HX → 0% n=

- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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Redaktion, 2017-09- 8 (Update: 2023-07- 1)