AMD Ryzen 9 7840HX vs AMD Ryzen 9 6980HX vs AMD Ryzen 5 6600H
AMD Ryzen 9 7840HX
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The AMD Ryzen 9 7840HX is a high-end notebook processor from 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 on 5nm (71mm²) and one IO die on 6nm (122mm²) which are all manufactured by 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).
AMD Ryzen 9 6980HX
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The AMD Ryzen 9 6980HX is a processor for big (gaming) laptops based on the Rembrandt generation. The R9 6980HX integrates all eight cores based on the Zen 3+ microarchitecture. They are clocked at 3.3 (guaranteed base clock) to 5 GHz (Turbo) and support SMT / Hyperthreading (16 threads). The chip is manufactured on the modern 6 nm TSMC process. The "X" in the name indicates the overclocking capabilities of the CPU.
The new Zen 3+ is a refresh of the Zen 3 architecture and should not offer a lot of changes. The chip itself however, offers a lot of new features, like support for USB 4 (40 Gbps), PCI-E Gen 4, DDR5-4800MT/s or LPDDR5-6400MT/s, WiFi 6E, Bluetooth LE 5.2, DisplayPort 2, and AV1 decode.
A big novelty is the integrated GPU Radeon 680M, that is now based on the RDNA2 architecture and offers 12 CUs at up to 2.4 GHz. It should be the fastest iGPU of all at the time of announcement.
Performance
While we have not tested a single system built around the 6980HX as of August 2023, we have tested at least one laptop featuring the 6950HS, a chip with very similar specs (8 cores, 16 threads, up to 4.9 GHz, Zen 3+). Based on that, expect the 6980HX to be up to 10% faster than the Ryzen 7 5800H, Ryzen 9 4900H, Ryzen 5 PRO 7640HS and also the Core i7-11800H. In other words, this is an impressive laptop CPU that will handle almost any task with ease, as of mid 2023.
Your mileage may vary depending on how high the CPU power limits are, and how competent the cooling solution of your system is.
Power consumption
This Ryzen 9 series APU has a default TDP, also known as the long-term power limit, of 45 W, with the letter X indicating that the chip is ready for some healthy bit of overclocking - which will lead to much higher power consumption, naturally.
The R9 6980HX is manufactured on a 6 nm process for higher-than-average, as of early 2023, energy efficiency.
AMD Ryzen 5 6600H
► remove from comparisonThe AMD Ryzen 5 6600H is a processor for big (gaming) laptops based of the Rembrandt generation. The R5 6600H integrates six of the eight cores based on the Zen 3+ microarchitecture. They are clocked at 3.3 (guaranteed base clock) to 4.5 GHz (Turbo) and support SMT / Hyperthreading (12 threads). The chip is manufactured on the modern 6 nm TSMC process.
The new Zen 3+ is a refresh of the Zen 3 architecture and should not offer a lot of changes. The chip itself however, offers a lot of new features, like support for USB 4 (40 Gbps), PCI-E Gen 4, DDR5-4800MT/s or LPDDR5-6400MT/s, WiFi 6E, Bluetooth LE 5.2, DisplayPort 2, and AV1 decode.
In the 6000 series, AMD finally switched to the current RDNA 2 graphics architecture for the iGPU. The 6600H only offers the slower Radeon 660M with 6 of the 12 CUs enabled and 1.9 GHz max. clock speed.
Performance
The average 6600H in our database is in the same league as the R7 5825U, the R7 6800U and also the Core i5-1340P, as far as multi-thread benchmark scores are concerned. This is a very decent result, as of late 2022.
Your mileage may vary depending on how high the CPU power limits are, and how competent the cooling solution of your system is.
Power consumption
This Ryzen 5 series APU has a default TDP, also known as the long-term power limit, of 45 W. A high-performance cooling solution is a must for a system built around such a chip.
The R5 6600H is built with TSMC's 6 nm process for great, as of early 2023, energy efficiency.
| Model | AMD Ryzen 9 7840HX | AMD Ryzen 9 6980HX | AMD Ryzen 5 6600H | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Codename | Dragon Range-HX (Zen 4) | Rembrandt-H (Zen 3+) | Rembrandt-H (Zen 3+) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Series | AMD Dragon Range (Zen 4, Ryzen 7X4X/8X4X) | AMD Rembrandt (Zen 3+) | AMD Rembrandt (Zen 3+) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Series: Rembrandt (Zen 3+) Rembrandt-H (Zen 3+) |
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| Clock | 2900 - 5100 MHz | 3300 - 5000 MHz | 3300 - 4500 MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| L1 Cache | 768 KB | 512 KB | 384 KB | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| L2 Cache | 12 MB | 4 MB | 3 MB | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| L3 Cache | 64 MB | 16 MB | 16 MB | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cores / Threads | 12 / 24 12 x 5.1 GHz AMD Zen 4 | 8 / 16 | 6 / 12 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| TDP | 55 Watt | 45 Watt | 45 Watt | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Transistors | 9900 Million | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Technology | 5 nm | 6 nm | 6 nm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| max. Temp. | 100 °C | 95 °C | 95 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Socket | FL1 | FP7/FP7r2 | FP7/FP7r2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Features | 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 | DDR5-4800/LPDDR5-6400 RAM (incl. ECC), PCIe 4, MMX (+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A, AES, AVX, AVX2, FMA3, SHA | DDR5-4800/LPDDR5-6400 RAM (incl. ECC), PCIe 4, MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| iGPU | AMD Radeon 610M (400 - 2200 MHz) | AMD Radeon 680M ( - 2400 MHz) | AMD Radeon 660M ( - 1900 MHz) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Architecture | x86 | x86 | x86 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Announced | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Manufacturer | www.amd.com | www.amd.com | www.amd.com |
Benchmarks
Average Benchmarks AMD Ryzen 9 7840HX → 0% n=0
Average Benchmarks AMD Ryzen 5 6600H → 0% n=0
- Average benchmark values for this graphics card* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation
