Core i5-8600K vs Ryzen Z2

Core i5-8600K vs Ryzen Z2 Performance Spectrum

Core i5-8600K

6 / 6

10,134

+0.3%

10,106

0.0%

Ryzen Threadripper PRO 3995WX

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 i5-8600K vs Ryzen Z2 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 i5-8600K vs Ryzen Z2: Pros, Cons & Final Verdict

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

Core i5-8600K

2017

Why buy it

✅+0.3% higher PassMark.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with UHD Graphics 630, while Ryzen Z2 needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen Z2 across 50 shared CPU benchmark tests.
❌Smaller total L3 cache (9 MB vs 16 MB).
❌Launch MSRP is still $257 MSRP, while Ryzen Z2 mostly shows up through inconsistent older-market listings.
❌1087.5% higher power demand at 95W vs 8W.
❌Older platform position on LGA1151 with DDR4, while Ryzen Z2 moves to FP7/FP7r2/FP8 and DDR5.

Ryzen Z2

2025

Why buy it

✅Better for gaming: +31.0% higher average FPS across 50 shared CPU benchmark tests.
✅+77.8% larger total L3 cache (16 MB vs 9 MB).
✅Draws 8W instead of 95W, a 87W reduction.
✅Newer platform on FP7/FP7r2/FP8 with DDR5 support instead of LGA1151 and DDR4.

Trade-offs

❌Lower PassMark (10,106 vs 10,134).
❌No integrated graphics, while Core i5-8600K can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Ryzen Z2 better than Core i5-8600K?

It depends on what you want from the system. For gaming, Ryzen Z2 is ahead with a 31.0% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i5-8600K pulls ahead with 0.3% better PassMark. Ryzen Z2 also has the bigger cache pool with 77.8% larger total L3 cache (16 MB vs 9 MB).

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

For streaming, content creation, and heavier multitasking, Core i5-8600K is the stronger fit. You are getting 0.3% better PassMark, backed by 6 cores and 6 threads.

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

Ryzen Z2 is still the much better call for a fresh build. Ryzen Z2 comes in at an unclear MSRP at unclear MSRP versus $257 MSRP, and it still gives you a 31.0% average FPS lead across 50 shared CPU game tests in our data. Core i5-8600K only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2017 platform. Even with 100.0% better value on paper (39.4 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA1151.

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

Ryzen Z2 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2025 vs 2017), a healthier platform with FP7/FP7r2/FP8 and DDR5 instead of LGA1151, and 77.8% larger total L3 cache (16 MB vs 9 MB). That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i5-8600K vs Ryzen Z2 Technical Specifications

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

Core i5-8600K

The Core i5-8600K is manufactured by Intel. It was released in 5 October 2017 (8 years ago). It is based on the Coffee Lake-S (2017−2018) architecture. It features 6 cores and 6 threads. Base frequency is 3.6 GHz, with boost up to 4.3 GHz. L3 cache: 9 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 95 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 10,134 points. Launch price was $257.

Ryzen Z2

The Ryzen Z2 is manufactured by AMD. It was released in 6 January 2025 (less than a year ago). It is based on the Hawk Point-U (Zen 4) (2023−2025) architecture. It features 8 cores and 16 threads. Base frequency is 3.3 GHz, with boost up to 5.1 GHz. L3 cache: 16 MB. L2 cache: 8 MB. Built on 4 nm process technology. Socket: FP7/FP7r2/FP8. Thermal design power (TDP): 8 MB + 16 MB. Memory support: DDR5. Passmark benchmark score: 10,106 points. Launch price was $149.

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Processing Power

The Core i5-8600K packs 6 cores / 6 threads, while the Ryzen Z2 offers 8 cores / 16 threads — the Ryzen Z2 has 2 more cores. Boost clocks reach 4.3 GHz on the Core i5-8600K versus 5.1 GHz on the Ryzen Z2 — a 17% clock advantage for the Ryzen Z2 (base: 3.6 GHz vs 3.3 GHz). The Core i5-8600K uses the Coffee Lake-S (2017−2018) architecture (14 nm), while the Ryzen Z2 uses Hawk Point-U (Zen 4) (2023−2025) (4 nm). In PassMark, the Core i5-8600K scores 10,134 against the Ryzen Z2's 10,106 — a 0.3% lead for the Core i5-8600K. L3 cache: 9 MB (total) on the Core i5-8600K vs 16 MB on the Ryzen Z2.

Feature	Core i5-8600K	Ryzen Z2
Cores / Threads	6 / 6	8 / 16+33%
Boost Clock	4.3 GHz	5.1 GHz+19%
Base Clock	3.6 GHz+9%	3.3 GHz
L3 Cache	9 MB (total)	16 MB+78%
L2 Cache	256K (per core)+3100%	8 MB
Process	14 nm	4 nm-71%
Architecture	Coffee Lake-S (2017−2018)	Hawk Point-U (Zen 4) (2023−2025)
PassMark	10,134	10,106
Geekbench 6 Single	1,550	—

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Memory & Platform

The Core i5-8600K uses the LGA1151 socket (PCIe 3.0), while the Ryzen Z2 uses FP7/FP7r2/FP8 (PCIe 4.0) — making them incompatible on the same motherboard.

Feature	Core i5-8600K	Ryzen Z2
Socket	LGA1151	FP7/FP7r2/FP8
PCIe Generation	PCIe 3.0	PCIe 4.0+33%
Max RAM Speed	DDR4-2666	—
Max RAM Capacity	128 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

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Advanced Features

Virtualization: VT-x, VT-d, EPT (Core i5-8600K) / not specified (Ryzen Z2). The Core i5-8600K includes integrated graphics (UHD Graphics 630), while the Ryzen Z2 requires a dedicated GPU. Primary use case: Core i5-8600K targets Gaming Desktop. Direct competitor: Core i5-8600K rivals Ryzen 5 2600X.