Ryzen 9 5900X vs U300

Ryzen 9 5900X vs U300 Performance Spectrum

Ryzen 9 5900X

12 / 24

38,955

+358.7%

Ryzen Threadripper 9960X

Ryzen Threadripper PRO 9975WX

U300

5 / 6

8,492

0.0%

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 U300 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 9 5900X vs U300: 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: +121.1% higher average FPS across 50 shared CPU benchmark tests.
✅+700% larger total L3 cache (64 MB vs 8 MB).
✅100+% more PCIe lanes (24 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Launch MSRP is still $549 MSRP, while U300 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 U300 moves to FCBGA1744 and DDR5.

U300

2023

Why buy it

✅Draws 55W instead of 105W, a 50W reduction.
✅Newer platform on FCBGA1744 with DDR5 support instead of AM4 and DDR4.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 50 shared CPU benchmark tests.
❌Lower PassMark (8,492 vs 38,955).
❌Smaller total L3 cache (8 MB vs 64 MB).

Quick Answers

So, is Ryzen 9 5900X better than U300?

Yes. Ryzen 9 5900X is the better all-around CPU here. It gives you a 121.1% average FPS lead across 50 shared CPU game tests in our data and 358.7% better PassMark, 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 121.1% 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 9 5900X is the stronger fit. You are getting 358.7% better PassMark, backed by 12 cores and 24 threads. It also has the larger cache pool with 700% larger total L3 cache (64 MB vs 8 MB).

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 $549 MSRP versus unclear MSRP, and it still gives you a 121.1% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (71.0 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

U300 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2020) and a healthier platform with FCBGA1744 and DDR5 instead of AM4. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Ryzen 9 5900X vs U300 Technical Specifications

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

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.

U300

The U300 is manufactured by Intel. It was released in 1 January 2023 (2 years ago). It features 5 cores and 6 threads. Max frequency: 4.4 GHz. L3 cache: 8 MB Intel® Smart Cache. Built on Intel 7 nm process technology. Socket: FCBGA1744. Thermal design power (TDP): 55 Watt. Memory support: DDR5-5200, DDR4-3200, LPDDR4x-4267. Passmark benchmark score: 8,492 points. Launch price was $149.

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Processing Power

The Ryzen 9 5900X packs 12 cores / 24 threads, while the U300 offers 5 cores / 6 threads — the Ryzen 9 5900X has 7 more cores. Boost clocks reach 4.8 GHz on the Ryzen 9 5900X versus 4.4 GHz on the U300 — a 8.7% clock advantage for the Ryzen 9 5900X. The Ryzen 9 5900X is built on the Vermeer (Zen3) (2020−2022) architecture. In PassMark, the Ryzen 9 5900X scores 38,955 against the U300's 8,492 — a 128.4% lead for the Ryzen 9 5900X. L3 cache: 64 MB on the Ryzen 9 5900X vs 8 MB Intel® Smart Cache on the U300.

Feature	Ryzen 9 5900X	U300
Cores / Threads	12 / 24+140%	5 / 6
Boost Clock	4.8 GHz+9%	4.4 GHz
Base Clock	3.7 GHz	—
L3 Cache	64 MB+700%	8 MB Intel® Smart Cache
L2 Cache	512K (per core)	—
Process	7 nm, 12 nm	Intel 7 nm
Architecture	Vermeer (Zen3) (2020−2022)	—
PassMark	38,955+359%	8,492
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 U300 uses FCBGA1744 (PCIe 4.0) — making them incompatible on the same motherboard.

Feature	Ryzen 9 5900X	U300
Socket	AM4	FCBGA1744
PCIe Generation	PCIe 4.0	PCIe 4.0
Max RAM Speed	DDR4-3200	—
Max RAM Capacity	128 GB	—
RAM Channels	2	—
ECC Support	Yes	—
PCIe Lanes	24	—

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Advanced Features

Virtualization: AMD-V (Ryzen 9 5900X) / not specified (U300). Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K.