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.

Processor U300

2023

Why buy it

✅Costs $356 less on MSRP ($193 MSRP vs $549 MSRP).
✅Draws 15W instead of 105W, a 90W 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 48 shared CPU benchmark tests.
❌Lower PassMark (8,897 vs 38,955).
❌Smaller total L3 cache (8 MB vs 64 MB).
❌Lower PassMark per dollar, at 46.1 vs 71.0 PassMark/$ ($193 MSRP vs $549 MSRP).

Ryzen 9 5900X

2020

Why buy it

✅Better for gaming: +117.6% higher average FPS across 48 shared CPU benchmark tests.
✅+700% larger total L3 cache (64 MB vs 8 MB).
✅Delivers 53.9% more PassMark for each dollar spent, at 71.0 vs 46.1 PassMark/$ ($549 MSRP vs $193 MSRP).
✅100+% more PCIe lanes (24 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌
184.5% HIGHER MSRP
$549 MSRPvs$193 MSRP
❌600% higher power demand at 105W vs 15W.
❌Older platform position on AM4 with DDR4, while Processor U300 moves to FCBGA1744 and DDR5.

Processor U300

2023

Ryzen 9 5900X

2020

Why buy it

✅Costs $356 less on MSRP ($193 MSRP vs $549 MSRP).
✅Draws 15W instead of 105W, a 90W reduction.
✅Newer platform on FCBGA1744 with DDR5 support instead of AM4 and DDR4.

Why buy it

✅Better for gaming: +117.6% higher average FPS across 48 shared CPU benchmark tests.
✅+700% larger total L3 cache (64 MB vs 8 MB).
✅Delivers 53.9% more PassMark for each dollar spent, at 71.0 vs 46.1 PassMark/$ ($549 MSRP vs $193 MSRP).
✅100+% more PCIe lanes (24 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 48 shared CPU benchmark tests.
❌Lower PassMark (8,897 vs 38,955).
❌Smaller total L3 cache (8 MB vs 64 MB).
❌Lower PassMark per dollar, at 46.1 vs 71.0 PassMark/$ ($193 MSRP vs $549 MSRP).

Trade-offs

❌
184.5% HIGHER MSRP
$549 MSRPvs$193 MSRP
❌600% higher power demand at 105W vs 15W.
❌Older platform position on AM4 with DDR4, while Processor U300 moves to FCBGA1744 and DDR5.

Quick Answers

So, is Ryzen 9 5900X better than Processor U300?

Yes. Ryzen 9 5900X is the better overall CPU here. You are getting a 117.6% average FPS lead across 48 shared CPU game tests in our data and 337.8% better PassMark, which makes it the stronger all-around choice.

Which one is better for gaming?

If gaming is the priority, Ryzen 9 5900X is the better pick here. According to our tests, it delivers 117.6% more average FPS across 48 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 better fit. You are getting 337.8% better PassMark, backed by 12 cores and 24 threads. It also carries 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 smarter buy today. Ryzen 9 5900X is 184.5% more expensive on MSRP at $549 MSRP versus $193 MSRP, and it gives you a 117.6% average FPS lead across 48 shared CPU game tests in our data. It is also 53.9% better value on MSRP (71.0 vs 46.1 PassMark/$), so the better CPU is not just faster, it is also the cleaner value play on paper.

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

Processor U300 is the more future-proof choice 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 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.

Processor U300 Benchmark Check

Ryzen 9 5900X Benchmark Check

Path of Exile 2

Preset	Processor U300	Ryzen 9 5900X
1080p
low	183 FPS	323 FPS
medium	150 FPS	291 FPS
high	122 FPS	243 FPS
ultra	100 FPS	193 FPS
1440p
low	150 FPS	307 FPS
medium	118 FPS	248 FPS
high	96 FPS	192 FPS
ultra	78 FPS	157 FPS
4K
low	84 FPS	193 FPS
medium	72 FPS	156 FPS
high	57 FPS	115 FPS
ultra	45 FPS	103 FPS

Open Processor U300 Open Ryzen 9 5900X

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Processor U300	Ryzen 9 5900X
1080p
low	166 FPS	772 FPS
medium	137 FPS	647 FPS
high	126 FPS	508 FPS
ultra	110 FPS	450 FPS
1440p
low	146 FPS	619 FPS
medium	123 FPS	536 FPS
high	115 FPS	443 FPS
ultra	99 FPS	364 FPS
4K
low	113 FPS	365 FPS
medium	98 FPS	318 FPS
high	85 FPS	289 FPS
ultra	72 FPS	255 FPS

Open Processor U300 Open Ryzen 9 5900X

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Processor U300	Ryzen 9 5900X
1080p
low	222 FPS	832 FPS
medium	222 FPS	645 FPS
high	222 FPS	558 FPS
ultra	222 FPS	459 FPS
1440p
low	222 FPS	721 FPS
medium	222 FPS	565 FPS
high	222 FPS	488 FPS
ultra	222 FPS	407 FPS
4K
low	222 FPS	511 FPS
medium	222 FPS	421 FPS
high	206 FPS	374 FPS
ultra	163 FPS	308 FPS

Open Processor U300 Open Ryzen 9 5900X

League of Legends

League of Legends

Valorant

Preset	Processor U300	Ryzen 9 5900X
1080p
low	222 FPS	974 FPS
medium	222 FPS	974 FPS
high	222 FPS	934 FPS
ultra	222 FPS	826 FPS
1440p
low	222 FPS	959 FPS
medium	222 FPS	843 FPS
high	222 FPS	726 FPS
ultra	222 FPS	617 FPS
4K
low	222 FPS	694 FPS
medium	222 FPS	621 FPS
high	222 FPS	541 FPS
ultra	222 FPS	437 FPS

Open Processor U300 Open Ryzen 9 5900X

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Processor U300 and Ryzen 9 5900X

Processor U300

The Processor U300 is manufactured by Intel. It was released in 4 January 2023 (2 years ago). It is based on the Raptor Lake-U (2023) architecture. It features 5 cores and 6 threads. Base frequency is 1.2 GHz, with boost up to 4.4 GHz. L3 cache: 8 MB (total). L2 cache: 1.25 MB (per core). Built on 10 nm process technology. Socket: FCBGA1744. Thermal design power (TDP): 15 Watt. Memory support: DDR4, DDR5 Dual-channel. Passmark benchmark score: 8,897 points. Launch price was $193.

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 Processor U300 packs 5 cores / 6 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 7 more cores. Boost clocks reach 4.4 GHz on the Processor U300 versus 4.8 GHz on the Ryzen 9 5900X — a 8.7% clock advantage for the Ryzen 9 5900X (base: 1.2 GHz vs 3.7 GHz). The Processor U300 uses the Raptor Lake-U (2023) architecture (10 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Processor U300 scores 8,897 against the Ryzen 9 5900X's 38,955 — a 125.6% lead for the Ryzen 9 5900X. L3 cache: 8 MB (total) on the Processor U300 vs 64 MB on the Ryzen 9 5900X.

Feature	Processor U300	Ryzen 9 5900X
Cores / Threads	5 / 6	12 / 24+140%
Boost Clock	4.4 GHz	4.8 GHz+9%
Base Clock	1.2 GHz	3.7 GHz+208%
L3 Cache	8 MB (total)	64 MB+700%
L2 Cache	1.25 MB (per core)+150%	512K (per core)
Process	10 nm	7 nm, 12 nm-30%
Architecture	Raptor Lake-U (2023)	Vermeer (Zen3) (2020−2022)
PassMark	8,897	38,955+338%
Cinebench R23 Multi	—	21,000
Geekbench 6 Single	—	2,174
Geekbench 6 Multi	—	11,888

🧠

Memory & Platform

The Processor U300 uses the FCBGA1744 socket (PCIe 5.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard.

Feature	Processor U300	Ryzen 9 5900X
Socket	FCBGA1744	AM4
PCIe Generation	PCIe 5.0+25%	PCIe 4.0
Max RAM Speed	—	DDR4-3200
Max RAM Capacity	—	128 GB
RAM Channels	—	2
ECC Support	—	Yes
PCIe Lanes	—	24

🔧

Advanced Features

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

Feature	Processor U300	Ryzen 9 5900X
Integrated GPU	—	No
Unlocked	—	Yes
AVX-512	—	No
Virtualization	—	AMD-V
Target Use	—	Workstation

💰

Value Analysis

The Processor U300 launched at $193 MSRP, while the Ryzen 9 5900X debuted at $549. On MSRP ($193 vs $549), the Processor U300 is $356 cheaper. In terms of value on MSRP (PassMark points per dollar), the Processor U300 delivers 46.1 pts/$ vs 71.0 pts/$ for the Ryzen 9 5900X — making the Ryzen 9 5900X the 42.5% better value option.