Core i5-12400 vs Ryzen 9 5900X

CPU

GPU

Core i5-12400

6 Cores12 Thrd65 WWMax: 4.4 GHz2022

Core family

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Ryzen 9 5900X

12 Cores24 Thrd105 WWMax: 4.8 GHz2020

Ryzen family

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Core i5-12400 vs Ryzen 9 5900X Performance Spectrum

Core i5-12400

6 / 12

18,794

0.0%

38,955

+107.3%

Ryzen Threadripper 9960X

Ryzen Threadripper PRO 9975WX

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.

Core i5-12400 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.

Core i5-12400 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.

Core i5-12400

2022

Why buy it

✅Costs $340 less on MSRP ($209 MSRP vs $549 MSRP).
✅Delivers 26.7% more PassMark for each dollar spent, at 89.9 vs 71.0 PassMark/$ ($209 MSRP vs $549 MSRP).
✅Draws 65W instead of 105W, a 40W reduction.
✅Newer platform on LGA1700 with DDR5 support instead of AM4 and DDR4.
✅Integrated graphics onboard with UHD Graphics 730, while Ryzen 9 5900X needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 50 shared CPU benchmark tests.
❌Lower Cinebench R23 multi-core (12,400 vs 21,000).
❌Smaller total L3 cache (18 MB vs 64 MB).

Ryzen 9 5900X

2020

Why buy it

✅Better for gaming: +35.2% higher average FPS across 50 shared CPU benchmark tests.
✅+255.6% larger total L3 cache (64 MB vs 18 MB).
✅20% more PCIe lanes (24 vs 20) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark per dollar, at 71.0 vs 89.9 PassMark/$ ($549 MSRP vs $209 MSRP).
❌61.5% higher power demand at 105W vs 65W.
❌Older platform position on AM4 with DDR4, while Core i5-12400 moves to LGA1700 and DDR5.
❌No integrated graphics, while Core i5-12400 can still boot and troubleshoot without a discrete GPU.
❌No boxed cooler included, unlike Core i5-12400.

Quick Answers

So, is Ryzen 9 5900X better than Core i5-12400?

Yes. Ryzen 9 5900X is the better all-around CPU here. It gives you a 35.2% average FPS lead across 50 shared CPU game tests in our data, 69.4% better Cinebench R23 multi-core, and 107.3% higher 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 35.2% 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 9 5900X is the stronger fit. You are getting 69.4% better Cinebench R23 multi-core, backed by 12 cores and 24 threads. It also has the larger cache pool with 255.6% larger total L3 cache (64 MB vs 18 MB).

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

Ryzen 9 5900X is still the faster CPU overall, but Core i5-12400 is easier to justify if budget matters more than peak performance. Ryzen 9 5900X comes in 162.7% more expensive on MSRP at $549 MSRP versus $209 MSRP, and it still gives you a 35.2% average FPS lead across 50 shared CPU game tests in our data. Core i5-12400 is also 26.7% better value on MSRP (89.9 vs 71.0 PassMark/$), which is why it can still make sense for tighter-budget builds on paper. That said, if you already own a compatible LGA1700 + DDR5 setup, Core i5-12400 can still make sense as a platform-matched option because it avoids a motherboard and RAM swap.

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

Core i5-12400 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2022 vs 2020) and a healthier platform with LGA1700 and DDR5 instead of AM4. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i5-12400 vs Ryzen 9 5900X Technical Specifications

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

Core i5-12400

The Core i5-12400 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: 18,794 points. Launch price was $299.

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.

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Processing Power

The Core i5-12400 packs 6 cores / 12 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 6 more cores. Boost clocks reach 4.4 GHz on the Core i5-12400 versus 4.8 GHz on the Ryzen 9 5900X — a 8.7% clock advantage for the Ryzen 9 5900X (base: 2.5 GHz vs 3.7 GHz). The Core i5-12400 uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Core i5-12400 scores 18,794 against the Ryzen 9 5900X's 38,955 — a 69.8% lead for the Ryzen 9 5900X. Cinebench R23 multi-core: 12,400 vs 21,000 (51.5% advantage for the Ryzen 9 5900X). Geekbench 6 single-core — the metric most relevant to gaming — records 2,381 vs 2,174, a 9.1% lead for the Core i5-12400 that directly translates to higher frame rates. Multi-core Geekbench: 10,632 vs 11,888 (11.2% advantage for the Ryzen 9 5900X). L3 cache: 18 MB (total) on the Core i5-12400 vs 64 MB on the Ryzen 9 5900X.

Feature	Core i5-12400	Ryzen 9 5900X
Cores / Threads	6 / 12	12 / 24+100%
Boost Clock	4.4 GHz	4.8 GHz+9%
Base Clock	2.5 GHz	3.7 GHz+48%
L3 Cache	18 MB (total)	64 MB+256%
L2 Cache	1.25 MB (per core)	512K (per core)+40860%
Process	Intel 7 nm	7 nm, 12 nm
Architecture	Alder Lake-S (2022)	Vermeer (Zen3) (2020−2022)
PassMark	18,794	38,955+107%
Cinebench R23 Multi	12,400	21,000+69%
Geekbench 6 Single	2,381+10%	2,174
Geekbench 6 Multi	10,632	11,888+12%

🧠

Memory & Platform

The Core i5-12400 uses the LGA1700 socket (PCIe 5.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800, DDR4-3200 on the Core i5-12400 versus DDR4-3200 on the Ryzen 9 5900X — the Core i5-12400 supports 50% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 20 (Core i5-12400) vs 24 (Ryzen 9 5900X) — the Ryzen 9 5900X offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: H610,B660,H670,Z690,B760,H770,Z790 (Core i5-12400) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).

Feature	Core i5-12400	Ryzen 9 5900X
Socket	LGA1700	AM4
PCIe Generation	PCIe 5.0+25%	PCIe 4.0
Max RAM Speed	DDR5-4800, DDR4-3200+50%	DDR4-3200
Max RAM Capacity	128 GB	128 GB
RAM Channels	2	2
ECC Support	No	Yes
PCIe Lanes	20	24+20%

🔧

Advanced Features

Virtualization support: VT-x, VT-d, EPT (Core i5-12400) vs AMD-V (Ryzen 9 5900X). The Core i5-12400 includes integrated graphics (UHD Graphics 730), while the Ryzen 9 5900X requires a dedicated GPU. Primary use case: Core i5-12400 targets Gaming Performance/Value, Ryzen 9 5900X targets Workstation. Direct competitor: Core i5-12400 rivals Ryzen 5 5600; Ryzen 9 5900X rivals Core i9-12900K.

Feature	Core i5-12400	Ryzen 9 5900X
Integrated GPU	Yes	No
IGPU Model	UHD Graphics 730	—
Unlocked	—	Yes
AVX-512	—	No
Virtualization	VT-x, VT-d, EPT	AMD-V
Target Use	Gaming Performance/Value	Workstation

💰

Value Analysis

At launch, the Core i5-12400 was priced at $209, while the Ryzen 9 5900X came in at $549. On launch pricing ($209 vs $549), Core i5-12400 was $340 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-12400 delivers 89.9 pts/$ vs 71.0 pts/$ for the Ryzen 9 5900X — making the Core i5-12400 the 23.6% better value option.

Feature	Core i5-12400	Ryzen 9 5900X
MSRP	$209-62%	$549
Performance per Dollar	89.9+27%	71.0
Release Date	2022	2020

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