Ryzen 7 7745HX vs Ryzen 9 3900XT

CPU

GPU

Ryzen 7 7745HX

8 Cores16 Thrd55 WWMax: 5.1 GHz2023

Ryzen family

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Ryzen 9 3900XT

12 Cores24 Thrd105 WWMax: 4.7 GHz2020

Ryzen family

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Ryzen 7 7745HX vs Ryzen 9 3900XT Performance Spectrum

Ryzen 7 7745HX

8 / 16

32,515

0.0%

Ryzen Threadripper PRO 5955WX

Ryzen 9 9950X

Ryzen Threadripper PRO 7965WX

Ryzen Threadripper PRO 7975WX

Ryzen 9 3900XT

12 / 24

32,512

0.0%

Ryzen Threadripper PRO 5955WX

Ryzen 9 9950X

Ryzen Threadripper PRO 7965WX

Ryzen Threadripper PRO 7975WX

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 7 7745HX vs Ryzen 9 3900XT 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.

Ryzen 7 7745HX vs Ryzen 9 3900XT: Pros, Cons & Final Verdict

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

Ryzen 7 7745HX

2023

Why buy it

✅+49.9% higher Geekbench single-core performance for gaming and desktop responsiveness.
✅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.
✅Integrated graphics onboard with Radeon 610M, while Ryzen 9 3900XT needs a discrete GPU.

Trade-offs

❌Smaller total L3 cache (32 MB vs 64 MB).

Ryzen 9 3900XT

2020

Why buy it

✅+100% larger total L3 cache (64 MB vs 32 MB).

Trade-offs

❌Lower Geekbench single-core performance for gaming (1,750 vs 2,623).
❌Lower Cinebench R23 multi-core (18,400 vs 18,606).
❌Launch MSRP is still $499 MSRP, while Ryzen 7 7745HX 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 7 7745HX moves to FL1 and DDR5.

Quick Answers

So, is Ryzen 7 7745HX better than Ryzen 9 3900XT?

Yes. Ryzen 7 7745HX is the better all-around CPU here. It gives you a 2.2% average FPS lead across 50 shared CPU game tests in our data, 1.1% better Cinebench R23 multi-core, 0.0% higher PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Ryzen 7 7745HX is the better pick. According to our tests, it delivers 2.2% more average FPS across 50 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Ryzen 7 7745HX is the stronger fit. You are getting 1.1% better Cinebench R23 multi-core, backed by 8 cores and 16 threads.

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

Ryzen 7 7745HX is still the faster CPU overall, but Ryzen 9 3900XT is easier to justify if budget matters more than peak performance. Ryzen 7 7745HX comes in at an unclear MSRP at unclear MSRP versus $499 MSRP, and it still gives you a 2.2% average FPS lead across 50 shared CPU game tests in our data. Ryzen 9 3900XT is also 100.0% better value on MSRP (65.2 vs 0.0 PassMark/$), 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 7 7745HX 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, and more multi-core headroom with 8 cores / 16 threads instead of 12/24. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Ryzen 7 7745HX vs Ryzen 9 3900XT Technical Specifications

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

Ryzen 7 7745HX

The Ryzen 7 7745HX is manufactured by AMD. It was released in 4 January 2023 (2 years ago). It is based on the Dragon Range (Zen 4) (2023) architecture. It features 8 cores and 16 threads. Base frequency is 3.6 GHz, with boost up to 5.1 GHz. L3 cache: 32 MB (total). L2 cache: 1 MB (per core). Built on CCD = 5 nm, I/O = 6 nm process technology. Socket: FL1. Thermal design power (TDP): 55 Watt. Memory support: DDR5. Passmark benchmark score: 32,515 points. Launch price was $499.

Ryzen 9 3900XT

The Ryzen 9 3900XT is manufactured by AMD. It was released in 7 July 2020 (5 years ago). It is based on the Matisse 2 (2020) architecture. It features 12 cores and 24 threads. Base frequency is 3.8 GHz, with boost up to 4.7 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: 32,512 points. Launch price was $499.

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Processing Power

The Ryzen 7 7745HX packs 8 cores / 16 threads, while the Ryzen 9 3900XT offers 12 cores / 24 threads — the Ryzen 9 3900XT has 4 more cores. Boost clocks reach 5.1 GHz on the Ryzen 7 7745HX versus 4.7 GHz on the Ryzen 9 3900XT — a 8.2% clock advantage for the Ryzen 7 7745HX (base: 3.6 GHz vs 3.8 GHz). The Ryzen 7 7745HX uses the Dragon Range (Zen 4) (2023) architecture (CCD = 5 nm, I/O = 6 nm), while the Ryzen 9 3900XT uses Matisse 2 (2020) (7 nm, 12 nm). In PassMark, the Ryzen 7 7745HX scores 32,515 against the Ryzen 9 3900XT's 32,512 — a 0% lead for the Ryzen 7 7745HX. Cinebench R23 multi-core: 18,606 vs 18,400 (1.1% advantage for the Ryzen 7 7745HX). Geekbench 6 single-core — the metric most relevant to gaming — records 2,623 vs 1,750, a 39.9% lead for the Ryzen 7 7745HX that directly translates to higher frame rates. Multi-core Geekbench: 14,000 vs 10,500 (28.6% advantage for the Ryzen 7 7745HX). L3 cache: 32 MB (total) on the Ryzen 7 7745HX vs 64 MB on the Ryzen 9 3900XT.

Feature	Ryzen 7 7745HX	Ryzen 9 3900XT
Cores / Threads	8 / 16	12 / 24+50%
Boost Clock	5.1 GHz+9%	4.7 GHz
Base Clock	3.6 GHz	3.8 GHz+6%
L3 Cache	32 MB (total)	64 MB+100%
L2 Cache	1 MB (per core)	512K (per core)+51100%
Process	CCD = 5 nm, I/O = 6 nm-29%	7 nm, 12 nm
Architecture	Dragon Range (Zen 4) (2023)	Matisse 2 (2020)
PassMark	32,515	32,512
Cinebench R23 Multi	18,606+1%	18,400
Geekbench 6 Single	2,623+50%	1,750
Geekbench 6 Multi	14,000+33%	10,500

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Memory & Platform

The Ryzen 7 7745HX uses the FL1 socket (PCIe 4.0), while the Ryzen 9 3900XT uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-5200 on the Ryzen 7 7745HX versus DDR4-3200 on the Ryzen 9 3900XT — the Ryzen 7 7745HX supports 62.5% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 9 3900XT supports up to 128 GB of RAM compared to 64 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 28 (Ryzen 7 7745HX) vs 24 (Ryzen 9 3900XT) — the Ryzen 7 7745HX offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: FL1 (Ryzen 7 7745HX) and X570,B550,X470,B450 (Ryzen 9 3900XT).

Feature	Ryzen 7 7745HX	Ryzen 9 3900XT
Socket	FL1	AM4
PCIe Generation	PCIe 4.0	PCIe 4.0
Max RAM Speed	DDR5-5200+63%	DDR4-3200
Max RAM Capacity	64 GB	128 GB+100%
RAM Channels	2	2
ECC Support	Yes	No
PCIe Lanes	28+17%	24

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Advanced Features

Both processors feature an unlocked multiplier for overclocking. Only the Ryzen 7 7745HX supports AVX-512 instructions — important for machine learning and scientific applications. Both support AMD-V virtualization. The Ryzen 7 7745HX includes integrated graphics (Radeon 610M), while the Ryzen 9 3900XT requires a dedicated GPU. Primary use case: Ryzen 7 7745HX targets Performance Gaming Laptop, Ryzen 9 3900XT targets Workstation / Enthusiast Gaming. Direct competitor: Ryzen 7 7745HX rivals Core i7-13700HX; Ryzen 9 3900XT rivals Core i9-10900K.

Feature	Ryzen 7 7745HX	Ryzen 9 3900XT
Integrated GPU	Yes	No
IGPU Model	Radeon 610M	—
Unlocked	Yes	Yes
AVX-512	Yes	No
Virtualization	AMD-V	AMD-V
Target Use	Performance Gaming Laptop	Workstation / Enthusiast Gaming