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Ryzen 9 5900X vs Ryzen 9 7945HX3D

CPUCPUGPUGPU
AMD

Ryzen 9 5900X

12 Cores24 Thrd105 WWMax: 4.8 GHz2020
Ryzen family
·······
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VS
AMD

Ryzen 9 7945HX3D

16 Cores32 Thrd55 WWMax: 5.4 GHz2023
Ryzen family
·······
Buy on Amazon

Ryzen 9 5900X vs Ryzen 9 7945HX3D Performance Spectrum

Ryzen 9 5900X
12 / 24
38,955
0.0%
brand logoRyzen 7 PRO 250
brand logoRyzen 5 7645HX
brand logoRyzen 9 8945H
brand logoRyzen AI 9 HX 375
brand logoRyzen 9 7945HX
brand logoRyzen 9 9950X3D
brand logoRyzen Threadripper 9960X
brand logoRyzen Threadripper PRO 9975WX
Ryzen 9 7945HX3D
16 / 32
57,803
+48.4%
brand logoRyzen AI Max 385
brand logoRyzen 9 3950X
brand logoRyzen 9 7845HX
brand logoRyzen 9 7900X
brand logoRyzen Threadripper PRO 5975WX
brand logoRyzen Threadripper 9960X
brand logoRyzen Threadripper 7970X
brand logoRyzen Threadripper PRO 7985WX

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.

Ryzen 9 5900X vs Ryzen 9 7945HX3D FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.

Search any supported game below to compare 1080p FPS for both components.

Path of Exile 2

Path of Exile 2

1080P
Ryzen 9 5900X
low323 FPS
medium291 FPS
high243 FPS
ultra193 FPS
1080P
Ryzen 9 7945HX3D
low279 FPS
medium257 FPS
high210 FPS
ultra178 FPS
Counter-Strike 2

Counter-Strike 2

1080P
Ryzen 9 5900X
low772 FPS
medium647 FPS
high508 FPS
ultra450 FPS
1080P
Ryzen 9 7945HX3D
low673 FPS
medium580 FPS
high432 FPS
ultra363 FPS
League of Legends

League of Legends

1080P
Ryzen 9 5900X
low832 FPS
medium645 FPS
high558 FPS
ultra459 FPS
1080P
Ryzen 9 7945HX3D
low1025 FPS
medium1077 FPS
high1022 FPS
ultra875 FPS
Valorant

Valorant

1080P
Ryzen 9 5900X
low974 FPS
medium974 FPS
high934 FPS
ultra826 FPS
1080P
Ryzen 9 7945HX3D
low1051 FPS
medium951 FPS
high833 FPS
ultra745 FPS
Among Us

Among Us

1080P
Ryzen 9 5900X
low60 FPS
medium60 FPS
high60 FPS
ultra60 FPS
1080P
Ryzen 9 7945HX3D
low60 FPS
medium60 FPS
high60 FPS
ultra60 FPS
Apex Legends

Apex Legends

1080P
Ryzen 9 5900X
low300 FPS
medium300 FPS
high300 FPS
ultra300 FPS
1080P
Ryzen 9 7945HX3D
low300 FPS
medium300 FPS
high300 FPS
ultra300 FPS
ARC Raiders

ARC Raiders

1080P
Ryzen 9 5900X
low309 FPS
medium238 FPS
high217 FPS
ultra194 FPS
1080P
Ryzen 9 7945HX3D
low309 FPS
medium238 FPS
high215 FPS
ultra192 FPS
Baldur's Gate 3

Baldur's Gate 3

1080P
Ryzen 9 5900X
low336 FPS
medium297 FPS
high235 FPS
ultra196 FPS
1080P
Ryzen 9 7945HX3D
low274 FPS
medium240 FPS
high186 FPS
ultra149 FPS
Call of Duty: Black Ops 6

Call of Duty: Black Ops 6

1080P
Ryzen 9 5900X
low355 FPS
medium306 FPS
high265 FPS
ultra225 FPS
1080P
Ryzen 9 7945HX3D
low346 FPS
medium313 FPS
high287 FPS
ultra247 FPS
Call of Duty: Warzone

Call of Duty: Warzone

1080P
Ryzen 9 5900X
low259 FPS
medium237 FPS
high200 FPS
ultra188 FPS
1080P
Ryzen 9 7945HX3D
low291 FPS
medium271 FPS
high229 FPS
ultra214 FPS
Check FPS with Custom Builds

Ryzen 9 5900X vs Ryzen 9 7945HX3D: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

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.

Quick Answers

So, is Ryzen 9 7945HX3D better than Ryzen 9 5900X?
It depends on what you want from the system. 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 stronger fit. You are getting 48.4% better PassMark, backed by 16 cores and 32 threads. It also has 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 is easier to justify if budget matters more than peak performance. Ryzen 9 7945HX3D comes in at an unclear MSRP at unclear MSRP versus $549 MSRP, and it still gives you 48.4% better PassMark. The compromise is that Ryzen 9 5900X is still the better pure gaming CPU with a 5.0% average FPS lead across 50 shared CPU game tests in our data. Ryzen 9 5900X is also 100.0% better value on MSRP (71.0 vs 0.0 PassMark/$), which is why it can still make sense for tighter-budget builds on paper.
Which one is more future-proof for 2026 and beyond?
Ryzen 9 7945HX3D makes more sense long term 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 gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Ryzen 9 5900X vs Ryzen 9 7945HX3D Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

AMD

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.

AMD

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.

⚡

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.

FeatureRyzen 9 5900XRyzen 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)+51100%
1 MB (per core)
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
—
🧠

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 62.5% 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).

FeatureRyzen 9 5900XRyzen 9 7945HX3D
Socket
AM4
FL1
PCIe Generation
PCIe 4.0
PCIe 5.0+25%
Max RAM Speed
DDR4-3200
5200+63%
Max RAM Capacity
128 GB
128 GB
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.

FeatureRyzen 9 5900XRyzen 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

At launch, the Ryzen 9 5900X was priced at $549, while the Ryzen 9 7945HX3D came in at $0. On launch pricing ($549 vs $0), Ryzen 9 7945HX3D was $549 cheaper.

FeatureRyzen 9 5900XRyzen 9 7945HX3D
MSRP
$549
$0-100%
Performance per Dollar
71.0
—
Release Date
2020
2023
Search Ryzen 9 5900X on AmazonSearch Ryzen 9 7945HX3D on Amazon

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