A4-9120C vs Ryzen 9 5900X

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.

A4-9120C vs Ryzen 9 5900X 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.

A4-9120C vs Ryzen 9 5900X: Pros, Cons & Final Verdict

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

A4-9120C

2019

Why buy it

✅Draws 6W instead of 105W, a 99W reduction.
✅Integrated graphics onboard with Radeon R4, while Ryzen 9 5900X needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 49 shared CPU benchmark tests.
❌Lower PassMark (1,258 vs 38,955).

Ryzen 9 5900X

2020

Why buy it

✅Better for gaming: +783.2% higher average FPS across 49 shared CPU benchmark tests.
✅200% more PCIe lanes (24 vs 8) for storage and expansion-heavy builds.

Trade-offs

❌Launch MSRP is still $549 MSRP, while A4-9120C mostly shows up through inconsistent older-market listings.
❌1650% higher power demand at 105W vs 6W.
❌No integrated graphics, while A4-9120C can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Ryzen 9 5900X better than A4-9120C?

Yes. Ryzen 9 5900X is the better all-around CPU here. It gives you a 783.2% average FPS lead across 49 shared CPU game tests in our data, 2996.6% better 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 9 5900X is the better pick. According to our tests, it delivers 783.2% more average FPS across 49 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Ryzen 9 5900X is the stronger fit. You are getting 2996.6% better PassMark, backed by 12 cores and 24 threads.

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

Ryzen 9 5900X is the better buy right now. Ryzen 9 5900X comes in at an unclear MSRP at $549 MSRP versus unclear MSRP, and it still gives you a 783.2% average FPS lead across 49 shared CPU game tests in our data. It is also 100.0% better value on MSRP (71.0 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Ryzen 9 5900X makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2020 vs 2019) and more multi-core headroom with 12 cores / 24 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

A4-9120C vs Ryzen 9 5900X Technical Specifications

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

A4-9120C

The A4-9120C is manufactured by AMD. It was released in 2014-01-01. It is based on the Stoney Ridge (2016−2019) architecture. It features 2 cores and 2 threads. Max frequency: 1.6 GHz. L2 cache: 1 MB. Built on 28 nm process technology. Socket: BGA. Thermal design power (TDP): 1 MB. Memory support: DDR4. Passmark benchmark score: 1,258 points. Launch price was $50.

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.

⚡

Processing Power

The A4-9120C packs 2 cores / 2 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 10 more cores. Boost clocks reach 1.6 GHz on the A4-9120C versus 4.8 GHz on the Ryzen 9 5900X — a 100% clock advantage for the Ryzen 9 5900X. The A4-9120C uses the Stoney Ridge (2016−2019) architecture (28 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the A4-9120C scores 1,258 against the Ryzen 9 5900X's 38,955 — a 187.5% lead for the Ryzen 9 5900X. Geekbench 6 single-core — the metric most relevant to gaming — records 418 vs 2,174, a 135.5% lead for the Ryzen 9 5900X that directly translates to higher frame rates.

Feature	A4-9120C	Ryzen 9 5900X
Cores / Threads	2 / 2	12 / 24+500%
Boost Clock	1.6 GHz	4.8 GHz+200%
Base Clock	—	3.7 GHz
L3 Cache	—	64 MB
L2 Cache	1 MB	512K (per core)+51100%
Process	28 nm	7 nm, 12 nm-75%
Architecture	Stoney Ridge (2016−2019)	Vermeer (Zen3) (2020−2022)
PassMark	1,258	38,955+2997%
Cinebench R23 Multi	—	21,000
Geekbench 6 Single	418	2,174+420%
Geekbench 6 Multi	—	11,888

🧠

Memory & Platform

The A4-9120C uses the BGA socket (PCIe 3.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-1866 on the A4-9120C versus DDR4-3200 on the Ryzen 9 5900X — the Ryzen 9 5900X supports 71.5% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 9 5900X supports up to 128 GB of RAM compared to 8 GB — 1500% more capacity for professional workloads. Memory channels: 1 (A4-9120C) vs 2 (Ryzen 9 5900X). PCIe lanes: 8 (A4-9120C) vs 24 (Ryzen 9 5900X) — the Ryzen 9 5900X offers 16 more lanes for additional GPUs or NVMe drives.

Feature	A4-9120C	Ryzen 9 5900X
Socket	BGA	AM4
PCIe Generation	PCIe 3.0	PCIe 4.0+33%
Max RAM Speed	DDR4-1866	DDR4-3200+71%
Max RAM Capacity	8 GB	128 GB+1500%
RAM Channels	1	2+100%
ECC Support	No	Yes
PCIe Lanes	8	24+200%

🔧

Advanced Features

Only the Ryzen 9 5900X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support AMD-V virtualization. The A4-9120C includes integrated graphics (Radeon R4), while the Ryzen 9 5900X requires a dedicated GPU. Primary use case: A4-9120C targets Chromebook, Ryzen 9 5900X targets Workstation. Direct competitor: A4-9120C rivals Celeron N3350; Ryzen 9 5900X rivals Core i9-12900K.