Core i5-12450HX vs Core i9-9900K

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 i5-12450HX vs Core i9-9900K 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 i5-12450HX vs Core i9-9900K: Pros, Cons & Final Verdict

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

Core i5-12450HX

2022

Why buy it

✅Draws 55W instead of 95W, a 40W reduction.
✅Newer platform on FCBGA1964 with DDR5 support instead of LGA1151 and DDR4.
✅200% more PCIe lanes (48 vs 16) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-9900K across 50 shared CPU benchmark tests.
❌Lower PassMark (18,064 vs 18,109).
❌Smaller total L3 cache (12 MB vs 16 MB).

Core i9-9900K

2018

Why buy it

✅Better for gaming: +27.2% higher average FPS across 50 shared CPU benchmark tests.
✅+33.3% larger total L3 cache (16 MB vs 12 MB).

Trade-offs

❌Launch MSRP is still $488 MSRP, while Core i5-12450HX mostly shows up through inconsistent older-market listings.
❌72.7% higher power demand at 95W vs 55W.
❌Older platform position on LGA1151 with DDR4, while Core i5-12450HX moves to FCBGA1964 and DDR5.

Quick Answers

So, is Core i9-9900K better than Core i5-12450HX?

Yes. Core i9-9900K is the better all-around CPU here. It gives you a 27.2% average FPS lead across 50 shared CPU game tests in our data and 0.2% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core i9-9900K is the better pick. According to our tests, it delivers 27.2% 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, Core i9-9900K is the stronger fit. You are getting 0.2% better PassMark, backed by 8 cores and 16 threads. It also has the larger cache pool with 33.3% larger total L3 cache (16 MB vs 12 MB).

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

Core i9-9900K is the better buy right now. Core i9-9900K comes in at an unclear MSRP at $488 MSRP versus unclear MSRP, and it still gives you a 27.2% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (37.1 vs 0.0 PassMark/$), 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 i5-12450HX makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2022 vs 2018) and a healthier platform with FCBGA1964 and DDR5 instead of LGA1151. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i5-12450HX vs Core i9-9900K Technical Specifications

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

Core i5-12450HX

The Core i5-12450HX is manufactured by Intel. It was released in 10 May 2022 (3 years ago). It is based on the Alder Lake-HX (2022) architecture. It features 8 cores and 12 threads. Base frequency is 2.4 GHz, with boost up to 4.4 GHz. L3 cache: 12 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: FCBGA1964. Thermal design power (TDP): 55 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 18,064 points. Launch price was $299.

Core i9-9900K

The Core i9-9900K is manufactured by Intel. It was released in 19 October 2018 (7 years ago). It is based on the Coffee Lake-R (2018−2019) architecture. It features 8 cores and 16 threads. Base frequency is 3.6 GHz, with boost up to 5 GHz. L3 cache: 16 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 95 Watt. Memory support: DDR4. Passmark benchmark score: 18,109 points. Launch price was $488.

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Processing Power

The Core i5-12450HX packs 8 cores / 12 threads, matching the Core i9-9900K's 8 cores. Boost clocks reach 4.4 GHz on the Core i5-12450HX versus 5 GHz on the Core i9-9900K — a 12.8% clock advantage for the Core i9-9900K (base: 2.4 GHz vs 3.6 GHz). The Core i5-12450HX uses the Alder Lake-HX (2022) architecture (Intel 7 nm), while the Core i9-9900K uses Coffee Lake-R (2018−2019) (14 nm). In PassMark, the Core i5-12450HX scores 18,064 against the Core i9-9900K's 18,109 — a 0.2% lead for the Core i9-9900K. L3 cache: 12 MB (total) on the Core i5-12450HX vs 16 MB (total) on the Core i9-9900K.

Feature	Core i5-12450HX	Core i9-9900K
Cores / Threads	8 / 12	8 / 16
Boost Clock	4.4 GHz	5 GHz+14%
Base Clock	2.4 GHz	3.6 GHz+50%
L3 Cache	12 MB (total)	16 MB (total)+33%
L2 Cache	1.25 MB (per core)	256K (per core)+20380%
Process	Intel 7 nm-50%	14 nm
Architecture	Alder Lake-HX (2022)	Coffee Lake-R (2018−2019)
PassMark	18,064	18,109
Geekbench 6 Single	2,150	—

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Memory & Platform

The Core i5-12450HX uses the FCBGA1964 socket (PCIe 3.0), while the Core i9-9900K uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800 on the Core i5-12450HX versus DDR4-2666 on the Core i9-9900K — the Core i5-12450HX supports 80% 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: 48 (Core i5-12450HX) vs 16 (Core i9-9900K) — the Core i5-12450HX offers 32 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM670,WM690 (Core i5-12450HX) and Intel 300 series (Core i9-9900K).

Feature	Core i5-12450HX	Core i9-9900K
Socket	FCBGA1964	LGA1151
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR5-4800+80%	DDR4-2666
Max RAM Capacity	128 GB	128 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	48+200%	16

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Advanced Features

Virtualization: VT-x, VT-d, EPT (Core i5-12450HX) / not specified (Core i9-9900K). Both include integrated graphics — UHD Graphics for 12th Gen (Core i5-12450HX) and Intel UHD Graphics 630 (Core i9-9900K) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i5-12450HX targets Workstation/Enthusiast Laptop. Direct competitor: Core i5-12450HX rivals Ryzen 5 7645HX.

Feature	Core i5-12450HX	Core i9-9900K
Integrated GPU	Yes	Yes
IGPU Model	UHD Graphics for 12th Gen	Intel UHD Graphics 630
Unlocked	Yes	—
AVX-512	No	—
Virtualization	VT-x, VT-d, EPT	—
Target Use	Workstation/Enthusiast Laptop	—