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.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, productivity performance, platform differences, power efficiency, pricing context, and upgrade path so you can see which CPU actually makes more sense.

Ryzen 9 5900X

2020

Why buy it

✅Better for gaming: +5.0% higher average FPS across 50 shared CPU benchmark tests.

Trade-offs

❌Lower PassMark (38,955 vs 57,803).
❌Smaller total L3 cache (64 MB vs 128 MB).
❌Launch MSRP is still $549 MSRP, while Ryzen 9 7945HX3D mostly shows up through inconsistent older-market listings.
❌90.9% higher power demand at 105W vs 55W.
❌Older platform position on AM4 with DDR4, while Ryzen 9 7945HX3D moves to FL1 and DDR5.

Ryzen 9 7945HX3D

2023

Why buy it

✅+48.4% higher PassMark.
✅+100% larger total L3 cache (128 MB vs 64 MB).
✅Draws 55W instead of 105W, a 50W reduction.
✅Newer platform on FL1 with DDR5 support instead of AM4 and DDR4.
✅16.7% more PCIe lanes (28 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 50 shared CPU benchmark tests.

Ryzen 9 5900X

2020

Ryzen 9 7945HX3D

2023

Why buy it

✅Better for gaming: +5.0% higher average FPS across 50 shared CPU benchmark tests.

Why buy it

✅+48.4% higher PassMark.
✅+100% larger total L3 cache (128 MB vs 64 MB).
✅Draws 55W instead of 105W, a 50W reduction.
✅Newer platform on FL1 with DDR5 support instead of AM4 and DDR4.
✅16.7% more PCIe lanes (28 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (38,955 vs 57,803).
❌Smaller total L3 cache (64 MB vs 128 MB).
❌Launch MSRP is still $549 MSRP, while Ryzen 9 7945HX3D mostly shows up through inconsistent older-market listings.
❌90.9% higher power demand at 105W vs 55W.
❌Older platform position on AM4 with DDR4, while Ryzen 9 7945HX3D moves to FL1 and DDR5.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 50 shared CPU benchmark tests.

Quick Answers

So, is Ryzen 9 7945HX3D better than Ryzen 9 5900X?

It depends on what matters more to you. For gaming, Ryzen 9 5900X is ahead with a 5.0% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Ryzen 9 7945HX3D pulls ahead with 48.4% better PassMark. Ryzen 9 7945HX3D also has the bigger cache pool with 100% larger total L3 cache (128 MB vs 64 MB).

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Ryzen 9 7945HX3D is the better fit. You are getting 48.4% better PassMark, backed by 16 cores and 32 threads. It also carries the larger cache pool with 100% larger total L3 cache (128 MB vs 64 MB).

Which one is the smarter buy today, not just the cheaper CPU?

Ryzen 9 7945HX3D is still the faster CPU overall, but Ryzen 9 5900X makes more sense if price matters more than absolute performance. Ryzen 9 7945HX3D is at an unclear MSRP at unclear MSRP versus $549 MSRP, and it gives you 48.4% better PassMark. The trade-off is that Ryzen 9 5900X is still the better pure gaming CPU with a 5.0% average FPS lead across 50 shared CPU game tests in our data. Ryzen 9 5900X is also 100.0% better value on MSRP (71.0 vs 0.0 PassMark/$), which is why it is easier to justify for price-conscious builds on paper.

Which one is more future-proof for 2026 and beyond?

Ryzen 9 7945HX3D is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2020), a healthier platform with FL1 and DDR5 instead of AM4, 100% larger total L3 cache (128 MB vs 64 MB), and more multi-core headroom with 16 cores / 32 threads instead of 12/24. That should give you a better long-term upgrade path for motherboard, RAM, and future CPU swaps.

Games Benchmarks

Paired with RTX 4090

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.

Ryzen 9 5900X Benchmark Check

Ryzen 9 7945HX3D Benchmark Check

Path of Exile 2

Preset	Ryzen 9 5900X	Ryzen 9 7945HX3D
1080p
low	323 FPS	279 FPS
medium	291 FPS	257 FPS
high	243 FPS	210 FPS
ultra	193 FPS	178 FPS
1440p
low	307 FPS	263 FPS
medium	248 FPS	220 FPS
high	192 FPS	169 FPS
ultra	157 FPS	149 FPS
4K
low	193 FPS	183 FPS
medium	156 FPS	152 FPS
high	115 FPS	116 FPS
ultra	103 FPS	103 FPS

Open Ryzen 9 5900X Open Ryzen 9 7945HX3D

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Ryzen 9 5900X	Ryzen 9 7945HX3D
1080p
low	772 FPS	673 FPS
medium	647 FPS	580 FPS
high	508 FPS	432 FPS
ultra	450 FPS	363 FPS
1440p
low	619 FPS	559 FPS
medium	536 FPS	499 FPS
high	443 FPS	385 FPS
ultra	364 FPS	301 FPS
4K
low	365 FPS	314 FPS
medium	318 FPS	284 FPS
high	289 FPS	250 FPS
ultra	255 FPS	211 FPS

Open Ryzen 9 5900X Open Ryzen 9 7945HX3D

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Ryzen 9 5900X	Ryzen 9 7945HX3D
1080p
low	832 FPS	1025 FPS
medium	645 FPS	1077 FPS
high	558 FPS	1022 FPS
ultra	459 FPS	875 FPS
1440p
low	721 FPS	884 FPS
medium	565 FPS	805 FPS
high	488 FPS	740 FPS
ultra	407 FPS	647 FPS
4K
low	511 FPS	539 FPS
medium	421 FPS	464 FPS
high	374 FPS	418 FPS
ultra	308 FPS	355 FPS

Open Ryzen 9 5900X Open Ryzen 9 7945HX3D

League of Legends

League of Legends

Valorant

Preset	Ryzen 9 5900X	Ryzen 9 7945HX3D
1080p
low	974 FPS	1051 FPS
medium	974 FPS	951 FPS
high	934 FPS	833 FPS
ultra	826 FPS	745 FPS
1440p
low	959 FPS	831 FPS
medium	843 FPS	736 FPS
high	726 FPS	645 FPS
ultra	617 FPS	555 FPS
4K
low	694 FPS	607 FPS
medium	621 FPS	544 FPS
high	541 FPS	482 FPS
ultra	437 FPS	416 FPS

Open Ryzen 9 5900X Open Ryzen 9 7945HX3D

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Ryzen 9 5900X and Ryzen 9 7945HX3D

Ryzen 9 5900X

The Ryzen 9 5900X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen3) (2020−2022) architecture. It features 12 cores and 24 threads. Base frequency is 3.7 GHz, with boost up to 4.8 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4-3200. Passmark benchmark score: 38,955 points. Launch price was $549.

Ryzen 9 7945HX3D

The Ryzen 9 7945HX3D is manufactured by AMD. It was released in 2023-07-27. It is based on the Dragon Range-HX (Zen 4) (2023−2024) architecture. It features 16 cores and 32 threads. Base frequency is 2.3 GHz, with boost up to 5.4 GHz. L3 cache: 128 MB (total). L2 cache: 1 MB (per core). Built on 5 nm process technology. Socket: FL1. Thermal design power (TDP): 55 Watt. Memory support: DDR5-5200. Passmark benchmark score: 57,803 points. Launch price was $800.

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Processing Power

The Ryzen 9 5900X packs 12 cores / 24 threads, while the Ryzen 9 7945HX3D offers 16 cores / 32 threads — the Ryzen 9 7945HX3D has 4 more cores. Boost clocks reach 4.8 GHz on the Ryzen 9 5900X versus 5.4 GHz on the Ryzen 9 7945HX3D — a 11.8% clock advantage for the Ryzen 9 7945HX3D (base: 3.7 GHz vs 2.3 GHz). The Ryzen 9 5900X uses the Vermeer (Zen3) (2020−2022) architecture (7 nm, 12 nm), while the Ryzen 9 7945HX3D uses Dragon Range-HX (Zen 4) (2023−2024) (5 nm). In PassMark, the Ryzen 9 5900X scores 38,955 against the Ryzen 9 7945HX3D's 57,803 — a 39% lead for the Ryzen 9 7945HX3D. L3 cache: 64 MB on the Ryzen 9 5900X vs 128 MB (total) on the Ryzen 9 7945HX3D.

Feature	Ryzen 9 5900X	Ryzen 9 7945HX3D
Cores / Threads	12 / 24	16 / 32+33%
Boost Clock	4.8 GHz	5.4 GHz+13%
Base Clock	3.7 GHz+61%	2.3 GHz
L3 Cache	64 MB	128 MB (total)+100%
L2 Cache	512K (per core)	1 MB (per core)+100%
Process	7 nm, 12 nm	5 nm-29%
Architecture	Vermeer (Zen3) (2020−2022)	Dragon Range-HX (Zen 4) (2023−2024)
PassMark	38,955	57,803+48%
Cinebench R23 Multi	21,000	—
Geekbench 6 Single	2,174	—
Geekbench 6 Multi	11,888	—

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Memory & Platform

The Ryzen 9 5900X uses the AM4 socket (PCIe 4.0), while the Ryzen 9 7945HX3D uses FL1 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the Ryzen 9 5900X versus 5200 on the Ryzen 9 7945HX3D — the Ryzen 9 7945HX3D supports 199.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 24 (Ryzen 9 5900X) vs 28 (Ryzen 9 7945HX3D) — the Ryzen 9 7945HX3D offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X) and FL1 (Ryzen 9 7945HX3D).

Feature	Ryzen 9 5900X	Ryzen 9 7945HX3D
Socket	AM4	FL1
PCIe Generation	PCIe 4.0	PCIe 5.0+25%
Max RAM Speed	DDR4-3200	5200+129900%
Max RAM Capacity	128 GB+104857500%	128
RAM Channels	2	2
ECC Support	Yes	Yes
PCIe Lanes	24	28+17%

🔧

Advanced Features

Both processors feature an unlocked multiplier for overclocking. Only the Ryzen 9 7945HX3D supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V (Ryzen 9 5900X) vs VT-x, VT-d, AMD-V (Ryzen 9 7945HX3D). The Ryzen 9 7945HX3D includes integrated graphics (AMD Radeon 610M), while the Ryzen 9 5900X requires a dedicated GPU. Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K; Ryzen 9 7945HX3D rivals Core Ultra 9 285HX.

Feature	Ryzen 9 5900X	Ryzen 9 7945HX3D
Integrated GPU	No	Yes
IGPU Model	—	AMD Radeon 610M
Unlocked	Yes	Yes
AVX-512	No	Yes
Virtualization	AMD-V	VT-x, VT-d, AMD-V
Target Use	Workstation	—

💰

Value Analysis

The Ryzen 9 5900X launched at $549 MSRP, while the Ryzen 9 7945HX3D debuted at $0. On MSRP ($549 vs $0), the Ryzen 9 7945HX3D is $549 cheaper.