Core i5-9600K vs Core i7-6800K

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 i5-9600K vs Core i7-6800K 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 i5-9600K vs Core i7-6800K: Pros, Cons & Final Verdict

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

Core i5-9600K

2018

Why buy it

✅Better for gaming: +5.4% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $171 less on MSRP ($263 MSRP vs $434 MSRP).
✅Delivers 63.9% more PassMark for each dollar spent, at 40.5 vs 24.7 PassMark/$ ($263 MSRP vs $434 MSRP).
✅Draws 95W instead of 140W, a 45W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (10,645 vs 10,715).
❌Smaller total L3 cache (9 MB vs 15 MB).

Core i7-6800K

2016

Why buy it

✅+0.7% higher PassMark.
✅+66.7% larger total L3 cache (15 MB vs 9 MB).

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-9600K across 50 shared CPU benchmark tests.
❌Lower PassMark per dollar, at 24.7 vs 40.5 PassMark/$ ($434 MSRP vs $263 MSRP).
❌47.4% higher power demand at 140W vs 95W.
❌No integrated graphics, while Core i5-9600K can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i5-9600K better than Core i7-6800K?

It depends on what you want from the system. For gaming, Core i5-9600K is ahead with a 5.4% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i7-6800K pulls ahead with 0.7% better PassMark. Core i7-6800K also has the bigger cache pool with 66.7% larger total L3 cache (15 MB vs 9 MB).

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

For streaming, content creation, and heavier multitasking, Core i7-6800K is the stronger fit. You are getting 0.7% better PassMark, backed by 6 cores and 12 threads. It also has the larger cache pool with 66.7% larger total L3 cache (15 MB vs 9 MB).

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

Core i5-9600K is the better buy right now. Core i5-9600K comes in $171 cheaper on MSRP at $263 MSRP versus $434 MSRP, and it still gives you a 5.4% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Core i7-6800K is still stronger for heavier multi-core work with 0.7% better PassMark. It is also 63.9% better value on MSRP (40.5 vs 24.7 PassMark/$), 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 i5-9600K makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2018 vs 2016). That makes it the safer long-term bet.

Core i5-9600K vs Core i7-6800K Technical Specifications

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

Core i5-9600K

The Core i5-9600K 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 6 cores and 6 threads. Base frequency is 3.7 GHz, with boost up to 4.6 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: DDR4-2666. Passmark benchmark score: 10,645 points. Launch price was $262.

Core i7-6800K

The Core i7-6800K is manufactured by Intel. It was released in 31 May 2016 (9 years ago). It is based on the Broadwell-E (2016) architecture. It features 6 cores and 12 threads. Base frequency is 3.4 GHz, with boost up to 3.8 GHz. L3 cache: 15 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA2011. Thermal design power (TDP): 140 Watt. Memory support: DDR4. Passmark benchmark score: 10,715 points. Launch price was $345.

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Processing Power

The Core i5-9600K packs 6 cores / 6 threads, matching the Core i7-6800K's 6 cores. Boost clocks reach 4.6 GHz on the Core i5-9600K versus 3.8 GHz on the Core i7-6800K — a 19% clock advantage for the Core i5-9600K (base: 3.7 GHz vs 3.4 GHz). The Core i5-9600K uses the Coffee Lake-R (2018−2019) architecture (14 nm), while the Core i7-6800K uses Broadwell-E (2016) (14 nm). In PassMark, the Core i5-9600K scores 10,645 against the Core i7-6800K's 10,715 — a 0.7% lead for the Core i7-6800K. L3 cache: 9 MB (total) on the Core i5-9600K vs 15 MB (total) on the Core i7-6800K.

Feature	Core i5-9600K	Core i7-6800K
Cores / Threads	6 / 6	6 / 12
Boost Clock	4.6 GHz+21%	3.8 GHz
Base Clock	3.7 GHz+9%	3.4 GHz
L3 Cache	9 MB (total)	15 MB (total)+67%
L2 Cache	256K (per core)	256 kB (per core)
Process	14 nm	14 nm
Architecture	Coffee Lake-R (2018−2019)	Broadwell-E (2016)
PassMark	10,645	10,715

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Memory & Platform

The Core i5-9600K uses the LGA1151 socket (PCIe 3.0), while the Core i7-6800K uses LGA2011 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i5-9600K	Core i7-6800K
Socket	LGA1151	LGA2011
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	2666	—
Max RAM Capacity	128	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

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Advanced Features

Virtualization: true (Core i5-9600K) / not specified (Core i7-6800K). The Core i5-9600K includes integrated graphics (Intel UHD Graphics 630), while the Core i7-6800K requires a dedicated GPU.

Feature	Core i5-9600K	Core i7-6800K
Integrated GPU	Yes	—
IGPU Model	Intel UHD Graphics 630	—
Unlocked	Yes	—
AVX-512	No	—
Virtualization	true	—

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Value Analysis

At launch, the Core i5-9600K was priced at $263, while the Core i7-6800K came in at $434. On launch pricing ($263 vs $434), Core i5-9600K was $171 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-9600K delivers 40.5 pts/$ vs 24.7 pts/$ for the Core i7-6800K — making the Core i5-9600K the 48.5% better value option.

Feature	Core i5-9600K	Core i7-6800K
MSRP	$263-39%	$434
Performance per Dollar	40.5+64%	24.7
Release Date	2018	2016

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