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 i5-12400F vs Core i9-9820X 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 i5-12400F vs Core i9-9820X: Pros, Cons & Final Verdict

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

Core i5-12400F

2022

Why buy it

✅Better for gaming: +7.0% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $715 less on MSRP ($174 MSRP vs $889 MSRP).
✅Delivers 387.8% more PassMark for each dollar spent, at 112.3 vs 23.0 PassMark/$ ($174 MSRP vs $889 MSRP).
✅Draws 65W instead of 165W, a 100W reduction.
✅Newer platform on LGA1700 with DDR5 support instead of LGA2066 and DDR4.

Trade-offs

❌Lower Geekbench multi-core (657 vs 9,361).

Core i9-9820X

2018

Why buy it

✅+1324.8% higher Geekbench multi-core.
✅120% more PCIe lanes (44 vs 20) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 50 shared CPU benchmark tests.
❌Lower PassMark per dollar, at 23.0 vs 112.3 PassMark/$ ($889 MSRP vs $174 MSRP).
❌153.8% higher power demand at 165W vs 65W.
❌Older platform position on LGA2066 with DDR4, while Core i5-12400F moves to LGA1700 and DDR5.
❌No boxed cooler included, unlike Core i5-12400F.

Quick Answers

So, is Core i5-12400F better than Core i9-9820X?

It depends on what you want from the system. For gaming, Core i5-12400F is ahead with a 7.0% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i9-9820X pulls ahead with 1324.8% better Geekbench multi-core.

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

For streaming, content creation, and heavier multitasking, Core i9-9820X is the stronger fit. You are getting 1324.8% better Geekbench multi-core, backed by 10 cores and 20 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 $715 cheaper on MSRP at $174 MSRP versus $889 MSRP, and it still gives you a 7.0% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Core i9-9820X is still stronger for heavier multi-core work with 1324.8% better Geekbench multi-core. It is also 387.8% better value on MSRP (112.3 vs 23.0 PassMark/$), 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 2018) and a healthier platform with LGA1700 and DDR5 instead of LGA2066. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i5-12400F vs Core i9-9820X Technical Specifications

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

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.

Core i9-9820X

The Core i9-9820X is manufactured by Intel. It was released in 19 October 2018 (7 years ago). It is based on the Skylake (server) (2017−2018) architecture. It features 10 cores and 20 threads. Base frequency is 3.3 GHz, with boost up to 4.2 GHz. L3 cache: 16.5 MB (total). L2 cache: 1 MB (per core). Built on 14 nm process technology. Socket: LGA2066. Thermal design power (TDP): 165 Watt. Memory support: DDR4-2666. Passmark benchmark score: 20,456 points. Launch price was $898.

⚡

Processing Power

The Core i5-12400F packs 6 cores / 12 threads, while the Core i9-9820X offers 10 cores / 20 threads — the Core i9-9820X has 4 more cores. Boost clocks reach 4.4 GHz on the Core i5-12400F versus 4.2 GHz on the Core i9-9820X — a 4.7% clock advantage for the Core i5-12400F (base: 2.5 GHz vs 3.3 GHz). The Core i5-12400F uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Core i9-9820X uses Skylake (server) (2017−2018) (14 nm). In PassMark, the Core i5-12400F scores 19,532 against the Core i9-9820X's 20,456 — a 4.6% lead for the Core i9-9820X. Geekbench 6 single-core — the metric most relevant to gaming — records 1,700 vs 1,394, a 19.8% lead for the Core i5-12400F that directly translates to higher frame rates. Multi-core Geekbench: 657 vs 9,361 (173.8% advantage for the Core i9-9820X). L3 cache: 18 MB (total) on the Core i5-12400F vs 16.5 MB (total) on the Core i9-9820X.

Feature	Core i5-12400F	Core i9-9820X
Cores / Threads	6 / 12	10 / 20+67%
Boost Clock	4.4 GHz+5%	4.2 GHz
Base Clock	2.5 GHz	3.3 GHz+32%
L3 Cache	18 MB (total)+9%	16.5 MB (total)
L2 Cache	1.25 MB (per core)+25%	1 MB (per core)
Process	Intel 7 nm-50%	14 nm
Architecture	Alder Lake-S (2022)	Skylake (server) (2017−2018)
PassMark	19,532	20,456+5%
Cinebench R23 Multi	12,380	—
Geekbench 6 Single	1,700+22%	1,394
Geekbench 6 Multi	657	9,361+1325%

🧠

Memory & Platform

The Core i5-12400F uses the LGA1700 socket (PCIe 3.0), while the Core i9-9820X uses LGA2066 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800, DDR4-3200 on the Core i5-12400F versus DDR4 2666 MHz on the Core i9-9820X — the Core i5-12400F supports 80% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 GB of RAM. Memory channels: 2 (Core i5-12400F) vs 4 (Core i9-9820X). PCIe lanes: 20 (Core i5-12400F) vs 44 (Core i9-9820X) — the Core i9-9820X offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: H610,B660,H670,Z690,B760,H770,Z790 (Core i5-12400F) and Intel X299 (Core i9-9820X).

Feature	Core i5-12400F	Core i9-9820X
Socket	LGA1700	LGA2066
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR5-4800, DDR4-3200+80%	DDR4 2666 MHz
Max RAM Capacity	128 GB	128 GB
RAM Channels	2	4+100%
ECC Support	No	No
PCIe Lanes	20	44+120%

🔧

Advanced Features

Virtualization support: VT-x, VT-d, EPT (Core i5-12400F) vs true (Core i9-9820X). Primary use case: Core i5-12400F targets Gaming Performance/Value, Core i9-9820X targets Workstation. Direct competitor: Core i5-12400F rivals Ryzen 5 5600.

Feature	Core i5-12400F	Core i9-9820X
Integrated GPU	No	No
Unlocked	—	Yes
AVX-512	—	Yes
Virtualization	VT-x, VT-d, EPT	true
Target Use	Gaming Performance/Value	Workstation

💰

Value Analysis

At launch, the Core i5-12400F was priced at $174, while the Core i9-9820X came in at $889. On launch pricing ($174 vs $889), Core i5-12400F was $715 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-12400F delivers 112.3 pts/$ vs 23.0 pts/$ for the Core i9-9820X — making the Core i5-12400F the 132% better value option.

Feature	Core i5-12400F	Core i9-9820X
MSRP	$174-80%	$889
Performance per Dollar	112.3+388%	23.0
Release Date	2022	2018

Search Core i5-12400F on Amazon

Search Core i9-9820X on Amazon

Affiliate Disclosure

ChipVERSUS is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. We may earn a commission on qualifying purchases made through our links. This comes at no additional cost to you and helps support our work in providing comprehensive PC building guides and tools.

Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates.