Core i9-12900K vs Ryzen 7 8840HX

Core i9-12900K vs Ryzen 7 8840HX Performance Spectrum

Core i9-12900K

16 / 24

41,180

0.0%

42,275

+2.7%

Ryzen 7 7735H

Ryzen 7 5800X3D

Ryzen AI 9 HX PRO 370

Ryzen 7 9700X

Ryzen 9 7945HX3D

Ryzen Threadripper PRO 5975WX

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 i9-12900K vs Ryzen 7 8840HX 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 i9-12900K vs Ryzen 7 8840HX: Pros, Cons & Final Verdict

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

Core i9-12900K

2021

Why buy it

Trade-offs

❌Lower PassMark (41,180 vs 42,275).
❌Smaller total L3 cache (30 MB vs 64 MB).
❌Launch MSRP is still $589 MSRP, while Ryzen 7 8840HX mostly shows up through inconsistent older-market listings.
❌127.3% higher power demand at 125W vs 55W.

Ryzen 7 8840HX

2025

Why buy it

✅+2.7% higher PassMark.
✅+113.3% larger total L3 cache (64 MB vs 30 MB).
✅Draws 55W instead of 125W, a 70W reduction.
✅40% more PCIe lanes (28 vs 20) for storage and expansion-heavy builds.

Trade-offs

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

Quick Answers

So, is Ryzen 7 8840HX better than Core i9-12900K?

It depends on what you want from the system. For gaming, Core i9-12900K is ahead with a 1.1% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Ryzen 7 8840HX pulls ahead with 2.7% better PassMark. Ryzen 7 8840HX also has the bigger cache pool with 113.3% larger total L3 cache (64 MB vs 30 MB).

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

For streaming, content creation, and heavier multitasking, Ryzen 7 8840HX is the stronger fit. You are getting 2.7% better PassMark, backed by 12 cores and 24 threads. It also has the larger cache pool with 113.3% larger total L3 cache (64 MB vs 30 MB).

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

Ryzen 7 8840HX is still the faster CPU overall, but Core i9-12900K is easier to justify if budget matters more than peak performance. Ryzen 7 8840HX comes in at an unclear MSRP at unclear MSRP versus $589 MSRP, and it still gives you 2.7% better PassMark. The compromise is that Core i9-12900K is still the better pure gaming CPU with a 1.1% average FPS lead across 50 shared CPU game tests in our data. Core i9-12900K is also 100.0% better value on MSRP (69.9 vs 0.0 PassMark/$), which is why it can still make sense for tighter-budget builds on paper.

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

Ryzen 7 8840HX makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2025 vs 2021), 113.3% larger total L3 cache (64 MB vs 30 MB), and more multi-core headroom with 12 cores / 24 threads instead of 16/24. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i9-12900K vs Ryzen 7 8840HX Technical Specifications

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

Core i9-12900K

The Core i9-12900K is manufactured by Intel. It was released in 4 November 2021 (4 years ago). It is based on the Alder Lake, Golden Cove, Gracemont (2021) architecture. It features 16 cores and 24 threads. Base frequency is 3.2 GHz, with boost up to 5.2 GHz. L3 cache: 30 MB (total). L2 cache: 1.25 MB (per core). Built on 10 nm process technology. Socket: LGA1700. Thermal design power (TDP): 125 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 41,180 points. Launch price was $589.

Ryzen 7 8840HX

The Ryzen 7 8840HX is manufactured by AMD. It was released in 23 April 2025 (less than a year ago). It is based on the Dragon Range (2025) architecture. It features 12 cores and 24 threads. Base frequency is 2.9 GHz, with boost up to 5.1 GHz. L3 cache: 64 MB (total). L2 cache: 1 MB (per core). Built on 5 nm process technology. Socket: FL1. Thermal design power (TDP): 55 Watt. Memory support: DDR5. Passmark benchmark score: 42,275 points. Launch price was $499.

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Processing Power

The Core i9-12900K packs 16 cores / 24 threads, while the Ryzen 7 8840HX offers 12 cores / 24 threads — the Core i9-12900K has 4 more cores. Boost clocks reach 5.2 GHz on the Core i9-12900K versus 5.1 GHz on the Ryzen 7 8840HX — a 1.9% clock advantage for the Core i9-12900K (base: 3.2 GHz vs 2.9 GHz). The Core i9-12900K uses the Alder Lake, Golden Cove, Gracemont (2021) architecture (10 nm), while the Ryzen 7 8840HX uses Dragon Range (2025) (5 nm). In PassMark, the Core i9-12900K scores 41,180 against the Ryzen 7 8840HX's 42,275 — a 2.6% lead for the Ryzen 7 8840HX. L3 cache: 30 MB (total) on the Core i9-12900K vs 64 MB (total) on the Ryzen 7 8840HX.

Feature	Core i9-12900K	Ryzen 7 8840HX
Cores / Threads	16 / 24+33%	12 / 24
Boost Clock	5.2 GHz+2%	5.1 GHz
Base Clock	3.2 GHz+10%	2.9 GHz
L3 Cache	30 MB (total)	64 MB (total)+113%
L2 Cache	1.25 MB (per core)+25%	1 MB (per core)
Process	10 nm	5 nm-50%
Architecture	Alder Lake, Golden Cove, Gracemont (2021)	Dragon Range (2025)
PassMark	41,180	42,275+3%

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Memory & Platform

The Core i9-12900K uses the LGA1700 socket (PCIe 5.0), while the Ryzen 7 8840HX uses FL1 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800 on the Core i9-12900K versus 5600 on the Ryzen 7 8840HX — the Ryzen 7 8840HX supports 16.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i9-12900K 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: 20 (Core i9-12900K) vs 28 (Ryzen 7 8840HX) — the Ryzen 7 8840HX offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel 600 series,Intel 700 series (Core i9-12900K) and FP8,FP7 (Ryzen 7 8840HX).

Feature	Core i9-12900K	Ryzen 7 8840HX
Socket	LGA1700	FL1
PCIe Generation	PCIe 5.0	PCIe 5.0
Max RAM Speed	DDR5-4800	5600+17%
Max RAM Capacity	128 GB+100%	64 GB
RAM Channels	2	2
ECC Support	Yes	Yes
PCIe Lanes	20	28+40%

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Advanced Features

Virtualization: not specified (Core i9-12900K) / VT-x, VT-d, AMD-V (Ryzen 7 8840HX). Both include integrated graphics — Intel UHD Graphics 770 (Core i9-12900K) and AMD Radeon 780M (Ryzen 7 8840HX) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Direct competitor: Ryzen 7 8840HX rivals Core i7-13700H.