Core i3-1210U vs Core i5-9400

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 i3-1210U vs Core i5-9400 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 i3-1210U vs Core i5-9400: Pros, Cons & Final Verdict

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

Core i3-1210U

2022

Why buy it

✅Better for gaming: +21.1% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 9W instead of 65W, a 56W reduction.
✅Newer platform on FCBGA1781 with DDR5 support instead of LGA1151 and DDR4.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Core i5-9400

2019

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Core i3-1210U across 50 shared CPU benchmark tests.
❌Lower PassMark (9,372 vs 9,438).
❌Launch MSRP is still $192 MSRP, while Core i3-1210U mostly shows up through inconsistent older-market listings.
❌622.2% higher power demand at 65W vs 9W.
❌Older platform position on LGA1151 with DDR4, while Core i3-1210U moves to FCBGA1781 and DDR5.

Quick Answers

So, is Core i3-1210U better than Core i5-9400?

Yes. Core i3-1210U is the better all-around CPU here. It gives you a 21.1% average FPS lead across 50 shared CPU game tests in our data, 0.7% 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, Core i3-1210U is the better pick. According to our tests, it delivers 21.1% 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, Core i3-1210U is the stronger fit. You are getting 0.7% better PassMark, backed by 6 cores and 8 threads.

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

Core i3-1210U is still the faster CPU overall, but Core i5-9400 is easier to justify if budget matters more than peak performance. Core i3-1210U comes in at an unclear MSRP at unclear MSRP versus $192 MSRP, and it still gives you a 21.1% average FPS lead across 50 shared CPU game tests in our data. Core i5-9400 is also 100.0% better value on MSRP (48.8 vs 0.0 PassMark/$), which is why it can still make sense for tighter-budget builds on paper.

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

Core i3-1210U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2022 vs 2019), a healthier platform with FCBGA1781 and DDR5 instead of LGA1151, and more multi-core headroom with 6 cores / 8 threads instead of 6/6. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i3-1210U vs Core i5-9400 Technical Specifications

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

Core i3-1210U

The Core i3-1210U is manufactured by Intel. It was released in 23 February 2022 (3 years ago). It is based on the Alder Lake-U (2022) architecture. It features 6 cores and 8 threads. Base frequency is 1 GHz, with boost up to 4.4 GHz. L3 cache: 10 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: FCBGA1781. Thermal design power (TDP): 9 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 9,438 points. Launch price was $149.

Core i5-9400

The Core i5-9400 is manufactured by Intel. It was released in 19 October 2018 (7 years ago). It is based on the Coffee Lake (2017−2019) architecture. It features 6 cores and 6 threads. Base frequency is 2.9 GHz, with boost up to 4.1 GHz. L3 cache: 9 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 65 Watt. Memory support: DDR4-2666. Passmark benchmark score: 9,372 points. Launch price was $182.

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Processing Power

The Core i3-1210U packs 6 cores / 8 threads, matching the Core i5-9400's 6 cores. Boost clocks reach 4.4 GHz on the Core i3-1210U versus 4.1 GHz on the Core i5-9400 — a 7.1% clock advantage for the Core i3-1210U (base: 1 GHz vs 2.9 GHz). The Core i3-1210U uses the Alder Lake-U (2022) architecture (Intel 7 nm), while the Core i5-9400 uses Coffee Lake (2017−2019) (14 nm). In PassMark, the Core i3-1210U scores 9,438 against the Core i5-9400's 9,372 — a 0.7% lead for the Core i3-1210U. L3 cache: 10 MB (total) on the Core i3-1210U vs 9 MB (total) on the Core i5-9400.

Feature	Core i3-1210U	Core i5-9400
Cores / Threads	6 / 8	6 / 6
Boost Clock	4.4 GHz+7%	4.1 GHz
Base Clock	1 GHz	2.9 GHz+190%
L3 Cache	10 MB (total)+11%	9 MB (total)
L2 Cache	1.25 MB (per core)	256K (per core)+20380%
Process	Intel 7 nm-50%	14 nm
Architecture	Alder Lake-U (2022)	Coffee Lake (2017−2019)
PassMark	9,438	9,372
Geekbench 6 Single	2,040	—

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Memory & Platform

The Core i3-1210U uses the FCBGA1781 socket (PCIe 5.0), while the Core i5-9400 uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches LPDDR5-5200 on the Core i3-1210U versus DDR4-2666 on the Core i5-9400 — the Core i3-1210U supports 95% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i5-9400 supports up to 128 GB of RAM compared to 64 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 14 (Core i3-1210U) vs 16 (Core i5-9400) — the Core i5-9400 offers 2 more lanes for additional GPUs or NVMe drives.

Feature	Core i3-1210U	Core i5-9400
Socket	FCBGA1781	LGA1151
PCIe Generation	PCIe 5.0+67%	PCIe 3.0
Max RAM Speed	LPDDR5-5200+95%	DDR4-2666
Max RAM Capacity	64 GB	128 GB+100%
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	14	16+14%

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Advanced Features

Neither processor supports overclocking. Virtualization support: VT-x, VT-d, EPT (Core i3-1210U) vs VT-x, VT-d (Core i5-9400). Both include integrated graphics — UHD Graphics for 12th Gen (64 EU) (Core i3-1210U) and UHD Graphics 630 (Core i5-9400) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i3-1210U targets Thin & Light Laptop, Core i5-9400 targets Desktop. Direct competitor: Core i3-1210U rivals Ryzen 3 5425U.

Feature	Core i3-1210U	Core i5-9400
Integrated GPU	Yes	Yes
IGPU Model	UHD Graphics for 12th Gen (64 EU)	UHD Graphics 630
Unlocked	No	No
AVX-512	No	No
Virtualization	VT-x, VT-d, EPT	VT-x, VT-d
Target Use	Thin & Light Laptop	Desktop