Ryzen 7 7840S vs EPYC 7351
Ryzen 7 7840S
EPYC 7351
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Ryzen 7 7840S
Performance Per Dollar EPYC 7351
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 7 7840S | EPYC 7351 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | ✨ Modern (Phoenix-HS (Zen 4) (2023) / 4 nm) | ✨ Modern (Naples (2017−2018) / 14 nm) |
💎 Value Proposition
| Insight | Ryzen 7 7840S | EPYC 7351 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | Equivalent pricing | Equivalent pricing |
Performance Check
To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.
Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.
Technical Specifications
Side-by-side comparison of Ryzen 7 7840S and EPYC 7351
Ryzen 7 7840S
The Ryzen 7 7840S is manufactured by AMD. It was released in 5 January 2023 (2 years ago). It is based on the Phoenix-HS (Zen 4) (2023) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 5.1 GHz. L3 cache: 16 MB. L2 cache: 8 MB. Built on 4 nm process technology. Socket: FP7/FP7r2/FP8. Thermal design power (TDP): 8 MB + 16 MB. Memory support: DDR5. Passmark benchmark score: 23,290 points. Launch price was $299.
EPYC 7351
The EPYC 7351 is manufactured by AMD. It was released in 29 June 2017 (8 years ago). It is based on the Naples (2017−2018) architecture. It features 16 cores and 32 threads. Base frequency is 2.4 GHz, with boost up to 2.9 GHz. L3 cache: 64 MB (total). L2 cache: 512K (per core). Built on 14 nm process technology. Socket: TR4. Thermal design power (TDP): 170 Watt. Memory support: DDR4 Eight-channel. Passmark benchmark score: 23,226 points. Launch price was $1,100.
Processing Power
The Ryzen 7 7840S packs 8 cores / 16 threads, while the EPYC 7351 offers 16 cores / 32 threads — the EPYC 7351 has 8 more cores. Boost clocks reach 5.1 GHz on the Ryzen 7 7840S versus 2.9 GHz on the EPYC 7351 — a 55% clock advantage for the Ryzen 7 7840S (base: 3.8 GHz vs 2.4 GHz). The Ryzen 7 7840S uses the Phoenix-HS (Zen 4) (2023) architecture (4 nm), while the EPYC 7351 uses Naples (2017−2018) (14 nm). In PassMark, the Ryzen 7 7840S scores 23,290 against the EPYC 7351's 23,226 — a 0.3% lead for the Ryzen 7 7840S. L3 cache: 16 MB on the Ryzen 7 7840S vs 64 MB (total) on the EPYC 7351.
| Feature | Ryzen 7 7840S | EPYC 7351 |
|---|---|---|
| Cores / Threads | 8 / 16 | 16 / 32+100% |
| Boost Clock | 5.1 GHz+76% | 2.9 GHz |
| Base Clock | 3.8 GHz+58% | 2.4 GHz |
| L3 Cache | 16 MB | 64 MB (total)+300% |
| L2 Cache | 8 MB+1500% | 512K (per core) |
| Process | 4 nm-71% | 14 nm |
| Architecture | Phoenix-HS (Zen 4) (2023) | Naples (2017−2018) |
| PassMark | 23,290 | 23,226 |
| Cinebench R23 Multi | 13,500 | — |
| Geekbench 6 Single | 2,570 | — |
| Geekbench 6 Multi | 13,535 | — |
Memory & Platform
The Ryzen 7 7840S uses the FP7/FP7r2/FP8 socket (PCIe 4.0), while the EPYC 7351 uses TR4 (PCIe 4.0) — making them incompatible on the same motherboard.
| Feature | Ryzen 7 7840S | EPYC 7351 |
|---|---|---|
| Socket | FP7/FP7r2/FP8 | TR4 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | DDR5-5600, LPDDR5x-7500 | — |
| Max RAM Capacity | 256 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ✅ | — |
| PCIe Lanes | 20 | — |
Advanced Features
Virtualization: AMD-V (SVM) (Ryzen 7 7840S) / not specified (EPYC 7351). The Ryzen 7 7840S includes integrated graphics (Radeon 780M), while the EPYC 7351 requires a dedicated GPU. Primary use case: Ryzen 7 7840S targets Gaming. Direct competitor: Ryzen 7 7840S rivals Core i7-1360P.
| Feature | Ryzen 7 7840S | EPYC 7351 |
|---|---|---|
| Integrated GPU | Yes | — |
| IGPU Model | Radeon 780M | — |
| Unlocked | No | — |
| AVX-512 | Yes | — |
| Virtualization | AMD-V (SVM) | — |
| Target Use | Gaming | — |
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