
Ryzen 9 6900HX vs Ryzen 7 PRO 7840U

Ryzen 9 6900HX

Ryzen 7 PRO 7840U
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
Performance Per Dollar Ryzen 7 PRO 7840U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 9 6900HX | Ryzen 7 PRO 7840U |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | ✨ Modern (Rembrandt-H (Zen 3+) (2022) / 6 nm) | ✨ Modern (Phoenix (Zen 4) (2023) / 4 nm) |
💎 Value Proposition
| Insight | Ryzen 9 6900HX | Ryzen 7 PRO 7840U |
|---|---|---|
| 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 9 6900HX and Ryzen 7 PRO 7840U

Ryzen 9 6900HX
The Ryzen 9 6900HX is manufactured by AMD. It was released in Janeiro 2022 (3 years ago). It is based on the Rembrandt-H (Zen 3+) (2022) architecture. It features 8 cores and 16 threads. Base frequency is 3.3 GHz, with boost up to 4.9 GHz. L3 cache: 16 MB (total). L2 cache: 512K (per core). Built on 6 nm process technology. Socket: FP7. Thermal design power (TDP): 45 Watt. Memory support: DDR5. Passmark benchmark score: 24,248 points. Launch price was $299.

Ryzen 7 PRO 7840U
The Ryzen 7 PRO 7840U is manufactured by AMD. It was released in 3 May 2023 (2 years ago). It is based on the Phoenix (Zen 4) (2023) architecture. It features 8 cores and 16 threads. Base frequency is 3.3 GHz, with boost up to 5.1 GHz. L3 cache: 16 MB. L2 cache: 8 MB. Built on 4 nm process technology. Socket: FP7/FP8. Thermal design power (TDP): 28 Watt. Memory support: LPDDR5x, DDR5. Passmark benchmark score: 24,531 points. Launch price was $299.
Processing Power
Both the Ryzen 9 6900HX and Ryzen 7 PRO 7840U share an identical 8-core/16-thread configuration. Boost clocks reach 4.9 GHz on the Ryzen 9 6900HX versus 5.1 GHz on the Ryzen 7 PRO 7840U — a 4% clock advantage for the Ryzen 7 PRO 7840U (base: 3.3 GHz vs 3.3 GHz). The Ryzen 9 6900HX uses the Rembrandt-H (Zen 3+) (2022) architecture (6 nm), while the Ryzen 7 PRO 7840U uses Phoenix (Zen 4) (2023) (4 nm). In PassMark, the Ryzen 9 6900HX scores 24,248 against the Ryzen 7 PRO 7840U's 24,531 — a 1.2% lead for the Ryzen 7 PRO 7840U. L3 cache: 16 MB (total) on the Ryzen 9 6900HX vs 16 MB on the Ryzen 7 PRO 7840U.
| Feature | Ryzen 9 6900HX | Ryzen 7 PRO 7840U |
|---|---|---|
| Cores / Threads | 8 / 16 | 8 / 16 |
| Boost Clock | 4.9 GHz | 5.1 GHz+4% |
| Base Clock | 3.3 GHz | 3.3 GHz |
| L3 Cache | 16 MB (total) | 16 MB |
| L2 Cache | 512K (per core) | 8 MB+1500% |
| Process | 6 nm | 4 nm-33% |
| Architecture | Rembrandt-H (Zen 3+) (2022) | Phoenix (Zen 4) (2023) |
| PassMark | 24,248 | 24,531+1% |
Memory & Platform
The Ryzen 9 6900HX uses the FP7 socket (PCIe 4.0), while the Ryzen 7 PRO 7840U uses FP7/FP8 (PCIe 4.0) — making them incompatible on the same motherboard.
| Feature | Ryzen 9 6900HX | Ryzen 7 PRO 7840U |
|---|---|---|
| Socket | FP7 | FP7/FP8 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
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