Athlon 300U vs Core i5-12400F

CPU

GPU

Athlon 300U

2 Cores4 Thrd15 WWMax: 3.3 GHz2019

Similar parts

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Core i5-12400F

6 Cores12 Thrd65 WWMax: 4.4 GHz2022

Core family

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Athlon 300U vs Core i5-12400F Performance Spectrum

Athlon 300U

2 / 4

3,861

0.0%

Ryzen Threadripper 3990X

Core i5-12400F

6 / 12

19,532

+405.9%

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.

Athlon 300U vs Core i5-12400F 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.

Athlon 300U vs Core i5-12400F: Pros, Cons & Final Verdict

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

Athlon 300U

2019

Why buy it

✅+174% higher Geekbench multi-core.
✅Draws 15W instead of 65W, a 50W reduction.
✅Integrated graphics onboard with Radeon RX Vega 3, while Core i5-12400F needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 50 shared CPU benchmark tests.
❌Smaller total L3 cache (4 MB vs 18 MB).
❌Older platform position on FP5 with DDR4, while Core i5-12400F moves to LGA1700 and DDR5.
❌No boxed cooler included, unlike Core i5-12400F.

Core i5-12400F

2022

Why buy it

✅Better for gaming: +161.1% higher average FPS across 50 shared CPU benchmark tests.
✅+350% larger total L3 cache (18 MB vs 4 MB).
✅Newer platform on LGA1700 with DDR5 support instead of FP5 and DDR4.
✅66.7% more PCIe lanes (20 vs 12) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Athlon 300U.

Trade-offs

❌Lower Geekbench multi-core (657 vs 1,800).
❌Launch MSRP is still $174 MSRP, while Athlon 300U mostly shows up through inconsistent older-market listings.
❌333.3% higher power demand at 65W vs 15W.
❌No integrated graphics, while Athlon 300U can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i5-12400F better than Athlon 300U?

It depends on what you want from the system. For gaming, Core i5-12400F is ahead with a 161.1% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Athlon 300U pulls ahead with 174% better Geekbench multi-core. Core i5-12400F also has the bigger cache pool with 350% larger total L3 cache (18 MB vs 4 MB).

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

For streaming, content creation, and heavier multitasking, Athlon 300U is the stronger fit. You are getting 174% better Geekbench multi-core, backed by 2 cores and 4 threads.

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

Core i5-12400F is the better buy right now. Core i5-12400F comes in at an unclear MSRP at $174 MSRP versus unclear MSRP, and it still gives you a 161.1% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Athlon 300U is still stronger for heavier multi-core work with 174% better Geekbench multi-core. It is also 100.0% better value on MSRP (112.3 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core i5-12400F makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2022 vs 2019), a healthier platform with LGA1700 and DDR5 instead of FP5, and 350% larger total L3 cache (18 MB vs 4 MB). That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Athlon 300U vs Core i5-12400F Technical Specifications

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

Athlon 300U

The Athlon 300U is manufactured by AMD. It was released in 2009-01-01. It is based on the Raven Ridge 2 (2019) architecture. It features 2 cores and 4 threads. Base frequency is 2.4 GHz, with boost up to 3.3 GHz. L3 cache: 4 MB (total). L2 cache: 512K (per core). Built on 14 nm process technology. Socket: FP5. Thermal design power (TDP): 15 Watt. Memory support: DDR4 Dual-channel. Passmark benchmark score: 3,861 points. Launch price was $149.

Core i5-12400F

The Core i5-12400F is manufactured by Intel. It was released in 4 January 2022 (3 years ago). It is based on the Alder Lake-S (2022) architecture. It features 6 cores and 12 threads. Base frequency is 2.5 GHz, with boost up to 4.4 GHz. L3 cache: 18 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: LGA1700. Thermal design power (TDP): 65 Watt. Memory support: DDR5-4800, DDR4-3200. Passmark benchmark score: 19,532 points. Launch price was $180.

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Processing Power

The Athlon 300U packs 2 cores / 4 threads, while the Core i5-12400F offers 6 cores / 12 threads — the Core i5-12400F has 4 more cores. Boost clocks reach 3.3 GHz on the Athlon 300U versus 4.4 GHz on the Core i5-12400F — a 28.6% clock advantage for the Core i5-12400F (base: 2.4 GHz vs 2.5 GHz). The Athlon 300U uses the Raven Ridge 2 (2019) architecture (14 nm), while the Core i5-12400F uses Alder Lake-S (2022) (Intel 7 nm). In PassMark, the Athlon 300U scores 3,861 against the Core i5-12400F's 19,532 — a 134% lead for the Core i5-12400F. Geekbench 6 single-core — the metric most relevant to gaming — records 900 vs 1,700, a 61.5% lead for the Core i5-12400F that directly translates to higher frame rates. Multi-core Geekbench: 1,800 vs 657 (93% advantage for the Athlon 300U). L3 cache: 4 MB (total) on the Athlon 300U vs 18 MB (total) on the Core i5-12400F.

Feature	Athlon 300U	Core i5-12400F
Cores / Threads	2 / 4	6 / 12+200%
Boost Clock	3.3 GHz	4.4 GHz+33%
Base Clock	2.4 GHz	2.5 GHz+4%
L3 Cache	4 MB (total)	18 MB (total)+350%
L2 Cache	512K (per core)+40860%	1.25 MB (per core)
Process	14 nm	Intel 7 nm-50%
Architecture	Raven Ridge 2 (2019)	Alder Lake-S (2022)
PassMark	3,861	19,532+406%
Cinebench R23 Multi	—	12,380
Geekbench 6 Single	900	1,700+89%
Geekbench 6 Multi	1,800+174%	657

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Memory & Platform

The Athlon 300U uses the FP5 socket (PCIe 3.0), while the Core i5-12400F uses LGA1700 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2400 on the Athlon 300U versus DDR5-4800, DDR4-3200 on the Core i5-12400F — the Core i5-12400F supports 100% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i5-12400F supports up to 128 GB of RAM compared to 32 GB — 300% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 12 (Athlon 300U) vs 20 (Core i5-12400F) — the Core i5-12400F offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: FP5 (Athlon 300U) and H610,B660,H670,Z690,B760,H770,Z790 (Core i5-12400F).

Feature	Athlon 300U	Core i5-12400F
Socket	FP5	LGA1700
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2400	DDR5-4800, DDR4-3200+100%
Max RAM Capacity	32 GB	128 GB+300%
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	12	20+67%

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Advanced Features

Virtualization support: AMD-V (Athlon 300U) vs VT-x, VT-d, EPT (Core i5-12400F). The Athlon 300U includes integrated graphics (Radeon RX Vega 3), while the Core i5-12400F requires a dedicated GPU. Primary use case: Athlon 300U targets Budget Laptop, Core i5-12400F targets Gaming Performance/Value. Direct competitor: Core i5-12400F rivals Ryzen 5 5600.

Feature	Athlon 300U	Core i5-12400F
Integrated GPU	Yes	No
IGPU Model	Radeon RX Vega 3	—
Unlocked	No	—
AVX-512	No	—
Virtualization	AMD-V	VT-x, VT-d, EPT
Target Use	Budget Laptop	Gaming Performance/Value