Core i7-9800X vs Ryzen 9 5900X

CPU

GPU

Core i7-9800X

8 Cores16 Thrd165 WWMax: 4.5 GHz2018

Similar parts

·······

Buy on Amazon

Ryzen 9 5900X

12 Cores24 Thrd105 WWMax: 4.8 GHz2020

Ryzen family

·······

Buy on Amazon

Core i7-9800X vs Ryzen 9 5900X Performance Spectrum

Core i7-9800X

8 / 16

18,128

0.0%

38,955

+114.9%

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 i7-9800X vs Ryzen 9 5900X 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 i7-9800X vs Ryzen 9 5900X: Pros, Cons & Final Verdict

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

Core i7-9800X

2018

Why buy it

✅83.3% more PCIe lanes (44 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 50 shared CPU benchmark tests.
❌Lower Cinebench R23 multi-core (13,067 vs 21,000).
❌Smaller total L3 cache (17 MB vs 64 MB).
❌Lower PassMark per dollar, at 30.8 vs 71.0 PassMark/$ ($589 MSRP vs $549 MSRP).
❌57.1% higher power demand at 165W vs 105W.

Ryzen 9 5900X

2020

Why buy it

✅Better for gaming: +29.8% higher average FPS across 50 shared CPU benchmark tests.
✅+287.9% larger total L3 cache (64 MB vs 17 MB).
✅Costs $40 less on MSRP ($549 MSRP vs $589 MSRP).
✅Delivers 130.5% more PassMark for each dollar spent, at 71.0 vs 30.8 PassMark/$ ($549 MSRP vs $589 MSRP).
✅Draws 105W instead of 165W, a 60W reduction.

Trade-offs

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

Quick Answers

So, is Ryzen 9 5900X better than Core i7-9800X?

Yes. Ryzen 9 5900X is the better all-around CPU here. It gives you a 29.8% average FPS lead across 50 shared CPU game tests in our data, 60.7% better Cinebench R23 multi-core, 114.9% higher 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, Ryzen 9 5900X is the better pick. According to our tests, it delivers 29.8% 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, Ryzen 9 5900X is the stronger fit. You are getting 60.7% better Cinebench R23 multi-core, backed by 12 cores and 24 threads. It also has the larger cache pool with 287.9% larger total L3 cache (64 MB vs 17 MB).

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

Ryzen 9 5900X is the better buy right now. Ryzen 9 5900X comes in $40 cheaper on MSRP at $549 MSRP versus $589 MSRP, and it still gives you a 29.8% average FPS lead across 50 shared CPU game tests in our data. It is also 130.5% better value on MSRP (71.0 vs 30.8 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Ryzen 9 5900X makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2020 vs 2018), 287.9% larger total L3 cache (64 MB vs 17 MB), and more multi-core headroom with 12 cores / 24 threads instead of 8/16. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core i7-9800X vs Ryzen 9 5900X Technical Specifications

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

Core i7-9800X

The Core i7-9800X 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 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 4.5 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: 18,128 points. Launch price was $589.

Ryzen 9 5900X

The Ryzen 9 5900X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen3) (2020−2022) architecture. It features 12 cores and 24 threads. Base frequency is 3.7 GHz, with boost up to 4.8 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4-3200. Passmark benchmark score: 38,955 points. Launch price was $549.

⚡

Processing Power

The Core i7-9800X packs 8 cores / 16 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 4 more cores. Boost clocks reach 4.5 GHz on the Core i7-9800X versus 4.8 GHz on the Ryzen 9 5900X — a 6.5% clock advantage for the Ryzen 9 5900X (base: 3.8 GHz vs 3.7 GHz). The Core i7-9800X uses the Skylake (server) (2017−2018) architecture (14 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Core i7-9800X scores 18,128 against the Ryzen 9 5900X's 38,955 — a 73% lead for the Ryzen 9 5900X. Cinebench R23 multi-core: 13,067 vs 21,000 (46.6% advantage for the Ryzen 9 5900X). Geekbench 6 single-core — the metric most relevant to gaming — records 1,372 vs 2,174, a 45.2% lead for the Ryzen 9 5900X that directly translates to higher frame rates. Multi-core Geekbench: 7,552 vs 11,888 (44.6% advantage for the Ryzen 9 5900X). L3 cache: 16.5 MB (total) on the Core i7-9800X vs 64 MB on the Ryzen 9 5900X.

Feature	Core i7-9800X	Ryzen 9 5900X
Cores / Threads	8 / 16	12 / 24+50%
Boost Clock	4.5 GHz	4.8 GHz+7%
Base Clock	3.8 GHz+3%	3.7 GHz
L3 Cache	16.5 MB (total)	64 MB+288%
L2 Cache	1 MB (per core)	512K (per core)+51100%
Process	14 nm	7 nm, 12 nm-50%
Architecture	Skylake (server) (2017−2018)	Vermeer (Zen3) (2020−2022)
PassMark	18,128	38,955+115%
Cinebench R23 Multi	13,067	21,000+61%
Geekbench 6 Single	1,372	2,174+58%
Geekbench 6 Multi	7,552	11,888+57%

🧠

Memory & Platform

The Core i7-9800X uses the LGA2066 socket (PCIe 3.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2666 on the Core i7-9800X versus DDR4-3200 on the Ryzen 9 5900X — the Ryzen 9 5900X supports 20% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 GB of RAM. Memory channels: 4 (Core i7-9800X) vs 2 (Ryzen 9 5900X). PCIe lanes: 44 (Core i7-9800X) vs 24 (Ryzen 9 5900X) — the Core i7-9800X offers 20 more lanes for additional GPUs or NVMe drives. Chipset compatibility: X299 (Core i7-9800X) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).

Feature	Core i7-9800X	Ryzen 9 5900X
Socket	LGA2066	AM4
PCIe Generation	PCIe 3.0	PCIe 4.0+33%
Max RAM Speed	DDR4-2666	DDR4-3200+20%
Max RAM Capacity	128 GB	128 GB
RAM Channels	4+100%	2
ECC Support	No	Yes
PCIe Lanes	44+83%	24

🔧

Advanced Features

Both processors feature an unlocked multiplier for overclocking. Only the Core i7-9800X supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: VT-x, VT-d (Core i7-9800X) vs AMD-V (Ryzen 9 5900X). Primary use case: Core i7-9800X targets Workstation, Ryzen 9 5900X targets Workstation. Direct competitor: Core i7-9800X rivals Ryzen 5 3600XT; Ryzen 9 5900X rivals Core i9-12900K.

Feature	Core i7-9800X	Ryzen 9 5900X
Integrated GPU	No	No
Unlocked	Yes	Yes
AVX-512	Yes	No
Virtualization	VT-x, VT-d	AMD-V
Target Use	Workstation	Workstation

💰

Value Analysis

At launch, the Core i7-9800X was priced at $589, while the Ryzen 9 5900X came in at $549. On launch pricing ($589 vs $549), Ryzen 9 5900X was $40 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i7-9800X delivers 30.8 pts/$ vs 71.0 pts/$ for the Ryzen 9 5900X — making the Ryzen 9 5900X the 79% better value option.

Feature	Core i7-9800X	Ryzen 9 5900X
MSRP	$589	$549-7%
Performance per Dollar	30.8	71.0+131%
Release Date	2018	2020

Search Core i7-9800X on Amazon

Search Ryzen 9 5900X 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.