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.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, productivity performance, platform differences, power efficiency, pricing context, and upgrade path so you can see which CPU actually makes more sense.

Core i9-12900HX

2022

Why buy it

✅+21.8% higher Geekbench multi-core.
✅Draws 55W instead of 105W, a 50W reduction.
✅Newer platform on FCBGA1964 with DDR5 support instead of AM4 and DDR4.
✅100% more PCIe lanes (48 vs 24) for storage and expansion-heavy builds.
✅Integrated graphics onboard with UHD Graphics 770, while Ryzen 9 3900X needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 3900X across 50 shared CPU benchmark tests.
❌Smaller total L3 cache (30 MB vs 64 MB).
❌Lower PassMark per dollar, at 54.5 vs 65.2 PassMark/$ ($606 MSRP vs $499 MSRP).

Ryzen 9 3900X

2019

Why buy it

✅Better for gaming: +20.1% higher average FPS across 50 shared CPU benchmark tests.
✅+113.3% larger total L3 cache (64 MB vs 30 MB).
✅Costs $107 less on MSRP ($499 MSRP vs $606 MSRP).
✅Delivers 19.6% more PassMark for each dollar spent, at 65.2 vs 54.5 PassMark/$ ($499 MSRP vs $606 MSRP).

Trade-offs

❌Lower Geekbench multi-core (12,000 vs 14,620).
❌90.9% higher power demand at 105W vs 55W.
❌Older platform position on AM4 with DDR4, while Core i9-12900HX moves to FCBGA1964 and DDR5.
❌No integrated graphics, while Core i9-12900HX can still boot and troubleshoot without a discrete GPU.

Core i9-12900HX

2022

Ryzen 9 3900X

2019

Why buy it

✅+21.8% higher Geekbench multi-core.
✅Draws 55W instead of 105W, a 50W reduction.
✅Newer platform on FCBGA1964 with DDR5 support instead of AM4 and DDR4.
✅100% more PCIe lanes (48 vs 24) for storage and expansion-heavy builds.
✅Integrated graphics onboard with UHD Graphics 770, while Ryzen 9 3900X needs a discrete GPU.

Why buy it

✅Better for gaming: +20.1% higher average FPS across 50 shared CPU benchmark tests.
✅+113.3% larger total L3 cache (64 MB vs 30 MB).
✅Costs $107 less on MSRP ($499 MSRP vs $606 MSRP).
✅Delivers 19.6% more PassMark for each dollar spent, at 65.2 vs 54.5 PassMark/$ ($499 MSRP vs $606 MSRP).

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 3900X across 50 shared CPU benchmark tests.
❌Smaller total L3 cache (30 MB vs 64 MB).
❌Lower PassMark per dollar, at 54.5 vs 65.2 PassMark/$ ($606 MSRP vs $499 MSRP).

Trade-offs

❌Lower Geekbench multi-core (12,000 vs 14,620).
❌90.9% higher power demand at 105W vs 55W.
❌Older platform position on AM4 with DDR4, while Core i9-12900HX moves to FCBGA1964 and DDR5.
❌No integrated graphics, while Core i9-12900HX can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i9-12900HX better than Ryzen 9 3900X?

It depends on what matters more to you. For gaming, Ryzen 9 3900X is ahead with a 20.1% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i9-12900HX pulls ahead with 21.8% better Geekbench multi-core. Ryzen 9 3900X 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, Core i9-12900HX is the better fit. You are getting 21.8% better Geekbench multi-core, backed by 16 cores and 24 threads.

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

Core i9-12900HX is still the faster CPU overall, but Ryzen 9 3900X makes more sense if price matters more than absolute performance. Core i9-12900HX is 21.4% more expensive on MSRP at $606 MSRP versus $499 MSRP, and it gives you 21.8% better Geekbench multi-core. The trade-off is that Ryzen 9 3900X is still the better pure gaming CPU with a 20.1% average FPS lead across 50 shared CPU game tests in our data. Ryzen 9 3900X is also 19.6% better value on MSRP (65.2 vs 54.5 PassMark/$), which is why it is easier to justify for price-conscious builds on paper.

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

Core i9-12900HX is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2022 vs 2019), a healthier platform with FCBGA1964 and DDR5 instead of AM4, and more multi-core headroom with 16 cores / 24 threads instead of 12/24. That should give you a better long-term upgrade path for motherboard, RAM, and future CPU swaps.

Games Benchmarks

Paired with RTX 4090

To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.

Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.

Core i9-12900HX Benchmark Check

Ryzen 9 3900X Benchmark Check

Path of Exile 2

Preset	Core i9-12900HX	Ryzen 9 3900X
1080p
low	269 FPS	209 FPS
medium	259 FPS	170 FPS
high	214 FPS	140 FPS
ultra	184 FPS	114 FPS
1440p
low	230 FPS	171 FPS
medium	198 FPS	131 FPS
high	159 FPS	104 FPS
ultra	140 FPS	86 FPS
4K
low	159 FPS	92 FPS
medium	136 FPS	77 FPS
high	106 FPS	61 FPS
ultra	93 FPS	49 FPS

Open Core i9-12900HX Open Ryzen 9 3900X

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i9-12900HX	Ryzen 9 3900X
1080p
low	613 FPS	781 FPS
medium	523 FPS	654 FPS
high	439 FPS	510 FPS
ultra	397 FPS	447 FPS
1440p
low	528 FPS	648 FPS
medium	470 FPS	552 FPS
high	397 FPS	452 FPS
ultra	340 FPS	369 FPS
4K
low	311 FPS	380 FPS
medium	281 FPS	326 FPS
high	266 FPS	293 FPS
ultra	232 FPS	258 FPS

Open Core i9-12900HX Open Ryzen 9 3900X

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i9-12900HX	Ryzen 9 3900X
1080p
low	775 FPS	813 FPS
medium	616 FPS	794 FPS
high	545 FPS	730 FPS
ultra	462 FPS	647 FPS
1440p
low	692 FPS	707 FPS
medium	554 FPS	583 FPS
high	485 FPS	522 FPS
ultra	416 FPS	459 FPS
4K
low	498 FPS	503 FPS
medium	416 FPS	403 FPS
high	373 FPS	361 FPS
ultra	314 FPS	292 FPS

Open Core i9-12900HX Open Ryzen 9 3900X

League of Legends

League of Legends

Valorant

Preset	Core i9-12900HX	Ryzen 9 3900X
1080p
low	825 FPS	813 FPS
medium	783 FPS	813 FPS
high	676 FPS	813 FPS
ultra	600 FPS	813 FPS
1440p
low	744 FPS	813 FPS
medium	659 FPS	813 FPS
high	569 FPS	714 FPS
ultra	496 FPS	619 FPS
4K
low	523 FPS	669 FPS
medium	474 FPS	594 FPS
high	421 FPS	525 FPS
ultra	366 FPS	437 FPS

Open Core i9-12900HX Open Ryzen 9 3900X

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i9-12900HX and Ryzen 9 3900X

Core i9-12900HX

The Core i9-12900HX 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 16 cores and 24 threads. Base frequency is 2.3 GHz, with boost up to 5 GHz. L3 cache: 30 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: 33,018 points. Launch price was $499.

Ryzen 9 3900X

The Ryzen 9 3900X is manufactured by AMD. It was released in 7 July 2019 (6 years ago). It is based on the Matisse (Zen 2) (2019−2020) architecture. It features 12 cores and 24 threads. Base frequency is 3.8 GHz, with boost up to 4.6 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 125 Watt. Memory support: DDR4 Dual-channel. Passmark benchmark score: 32,517 points. Launch price was $499.

⚡

Processing Power

The Core i9-12900HX packs 16 cores / 24 threads, while the Ryzen 9 3900X offers 12 cores / 24 threads — the Core i9-12900HX has 4 more cores. Boost clocks reach 5 GHz on the Core i9-12900HX versus 4.6 GHz on the Ryzen 9 3900X — a 8.3% clock advantage for the Core i9-12900HX (base: 2.3 GHz vs 3.8 GHz). The Core i9-12900HX uses the Alder Lake-HX (2022) architecture (Intel 7 nm), while the Ryzen 9 3900X uses Matisse (Zen 2) (2019−2020) (7 nm, 12 nm). In PassMark, the Core i9-12900HX scores 33,018 against the Ryzen 9 3900X's 32,517 — a 1.5% lead for the Core i9-12900HX. Geekbench 6 single-core — the metric most relevant to gaming — records 2,426 vs 1,300, a 60.4% lead for the Core i9-12900HX that directly translates to higher frame rates. Multi-core Geekbench: 14,620 vs 12,000 (19.7% advantage for the Core i9-12900HX). L3 cache: 30 MB (total) on the Core i9-12900HX vs 64 MB on the Ryzen 9 3900X.

Feature	Core i9-12900HX	Ryzen 9 3900X
Cores / Threads	16 / 24+33%	12 / 24
Boost Clock	5 GHz+9%	4.6 GHz
Base Clock	2.3 GHz	3.8 GHz+65%
L3 Cache	30 MB (total)	64 MB+113%
L2 Cache	1.25 MB (per core)+150%	512K (per core)
Process	Intel 7 nm	7 nm, 12 nm
Architecture	Alder Lake-HX (2022)	Matisse (Zen 2) (2019−2020)
PassMark	33,018+2%	32,517
Cinebench R23 Multi	23,150	—
Geekbench 6 Single	2,426+87%	1,300
Geekbench 6 Multi	14,620+22%	12,000

🧠

Memory & Platform

The Core i9-12900HX uses the FCBGA1964 socket (PCIe 5.0), while the Ryzen 9 3900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800, DDR4-3200 on the Core i9-12900HX versus DDR4-3200 on the Ryzen 9 3900X — the Core i9-12900HX supports 22.2% 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 i9-12900HX) vs 24 (Ryzen 9 3900X) — the Core i9-12900HX offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM670,WM690 (Core i9-12900HX) and X570,B550 (Ryzen 9 3900X).

Feature	Core i9-12900HX	Ryzen 9 3900X
Socket	FCBGA1964	AM4
PCIe Generation	PCIe 5.0+25%	PCIe 4.0
Max RAM Speed	DDR5-4800, DDR4-3200+25%	DDR4-3200
Max RAM Capacity	128 GB	128 GB
RAM Channels	2	2
ECC Support	No	Yes
PCIe Lanes	48+100%	24

🔧

Advanced Features

Both processors feature an unlocked multiplier for overclocking. Virtualization support: VT-x, VT-d, EPT (Core i9-12900HX) vs AMD-V (Ryzen 9 3900X). The Core i9-12900HX includes integrated graphics (UHD Graphics 770), while the Ryzen 9 3900X requires a dedicated GPU. Primary use case: Core i9-12900HX targets High-end Mobile Performance, Ryzen 9 3900X targets Workstation. Direct competitor: Core i9-12900HX rivals Ryzen 9 6900HX.

Feature	Core i9-12900HX	Ryzen 9 3900X
Integrated GPU	Yes	No
IGPU Model	UHD Graphics 770	None
Unlocked	Yes	Yes
AVX-512	No	No
Virtualization	VT-x, VT-d, EPT	AMD-V
Target Use	High-end Mobile Performance	Workstation

💰

Value Analysis

The Core i9-12900HX launched at $606 MSRP, while the Ryzen 9 3900X debuted at $499. On MSRP ($606 vs $499), the Ryzen 9 3900X is $107 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i9-12900HX delivers 54.5 pts/$ vs 65.2 pts/$ for the Ryzen 9 3900X — making the Ryzen 9 3900X the 17.9% better value option.