AMD Ryzen 9 7840HX vs AMD Ryzen 7 5800X
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 7 5800X
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The AMD Ryzen 7 5800X is an 8-core desktop processor with Simultaneous Multithreading (SMT), which allows it to process 16 threads simultaneously. With its launch on 08.10.2020, it is the fastest 8-core processor from AMD. The second fastest 8-core processor will be the AMD Ryzen 7 3800XT, followed by the more economical AMD Ryzen 7 3700X, also with 8 cores and 16 threads.
The Ryzen 7 5800X clocks with a base clock of 3.8 GHz and reaches up to 4.7 GHz on one core in turbo mode. When all 8 cores are utilized, the AMD Ryzen 7 5800X, like the AMD Ryzen 9 5900X, achieves up to 4.5 GHz.
At first glance, the internal structure of the processor has not changed fundamentally. The CCX structure has changed somewhat compared to Zen2, because now a CCX consists of up to 8-CPU cores. So each individual core can access the complete L3 cache (32 MByte). Furthermore the CCX modules are connected to each other via the same I/O die, which we already know from Zen2. According to AMD, the Infinity-Fabric should now reach clock rates of up to 2Ghz, which in turn allows a RAM clock of 4.000 MHz without performance loss.
Performance
The average 5800X in our database is in the same league as the Core i9-10900K and also the Core i7-12700F, as far as multi-thread benchmark scores are concerned.
In games, AMD's Ryzen 7 5800X can convince with its significantly improved IPC and even put Intel in its place. With the AMD Ryzen 7 5800X, gamers are well prepared for the future as simultaneous streaming is no problem with the new Ryzen 7 5800X. Semi-professional content creators, who need even more power, can choose a Ryzen 9 5900X or the Ryzen 9 5950X on the shelf.
Power consumption
The Ryzen 7 has a default TDP (also known as the long-term power limit) of 105 W. This applies as long as the CPU runs at stock clock speeds.
Ryzen 7 5800X is built with TSMC's 7 nm process; as rumors have it, the I/O die is manufactured separately on the 12 nm Global Foundries process.
| Model | AMD Ryzen 9 7840HX | AMD Ryzen 7 5800X | ||||||||||||||||||||||||||||||||||||
| Codename | Dragon Range-HX (Zen 4) | Vermeer (Zen 3) | ||||||||||||||||||||||||||||||||||||
| Series | AMD Dragon Range (Zen 4, Ryzen 7X4X/8X4X) | AMD Vermeer (Ryzen 5000) | ||||||||||||||||||||||||||||||||||||
| Series: Vermeer (Ryzen 5000) Vermeer (Zen 3) |
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| Clock | 2900 - 5100 MHz | 3800 - 4700 MHz | ||||||||||||||||||||||||||||||||||||
| L1 Cache | 768 KB | 512 KB | ||||||||||||||||||||||||||||||||||||
| L2 Cache | 12 MB | 4 MB | ||||||||||||||||||||||||||||||||||||
| L3 Cache | 64 MB | 32 MB | ||||||||||||||||||||||||||||||||||||
| Cores / Threads | 12 / 24 12 x 5.1 GHz AMD Zen 4 | 8 / 16 | ||||||||||||||||||||||||||||||||||||
| TDP | 55 Watt | 105 Watt | ||||||||||||||||||||||||||||||||||||
| Transistors | 9900 Million | |||||||||||||||||||||||||||||||||||||
| Technology | 5 nm | 7 nm | ||||||||||||||||||||||||||||||||||||
| max. Temp. | 100 °C | 90 °C | ||||||||||||||||||||||||||||||||||||
| Socket | FL1 | AM4 (LGA1331) | ||||||||||||||||||||||||||||||||||||
| 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 | DDR4-3200 RAM, PCIe 4, MMX (+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A, AES, AVX, AVX2, FMA3, SHA | ||||||||||||||||||||||||||||||||||||
| iGPU | AMD Radeon 610M (400 - 2200 MHz) | |||||||||||||||||||||||||||||||||||||
| Architecture | x86 | x86 | ||||||||||||||||||||||||||||||||||||
| Announced | ||||||||||||||||||||||||||||||||||||||
| Manufacturer | www.amd.com | www.amd.com | ||||||||||||||||||||||||||||||||||||
| Die Size | 2 x 80.7 sq. mm; I/O = 125 mm2 | |||||||||||||||||||||||||||||||||||||
| $449 U.S. |
Benchmarks
Average Benchmarks AMD Ryzen 9 7840HX → 100% n=2
Average Benchmarks AMD Ryzen 7 5800X → 76% n=2
- Average benchmark values for this graphics card* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation
