Core i9-11900K vs Xeon Gold 6240

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 i9-11900K vs Xeon Gold 6240 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 i9-11900K vs Xeon Gold 6240: Pros, Cons & Final Verdict

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

Core i9-11900K

2021

Why buy it

✅Better for gaming: +4.7% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 125W instead of 150W, a 25W reduction.

Trade-offs

❌Smaller total L3 cache (16 MB vs 25 MB).
❌Less compelling for workstation-style loads than Xeon Gold 6240, which brings 18 cores / 36 threads.
❌Launch MSRP is still $539 MSRP, while Xeon Gold 6240 mostly shows up through inconsistent older-market listings.

Xeon Gold 6240

2019

Why buy it

✅+54.7% larger total L3 cache (25 MB vs 16 MB).
✅Better for workstations and heavier parallel workloads: 18 cores / 36 threads.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-11900K across 50 shared CPU benchmark tests.
❌Lower PassMark (24,918 vs 24,990).
❌20% higher power demand at 150W vs 125W.

Quick Answers

So, is Core i9-11900K better than Xeon Gold 6240?

Not really, because they are built for different jobs. Xeon Gold 6240 makes more sense for workstation-style multi-core throughput, while Core i9-11900K is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Core i9-11900K is the better pick. According to our tests, it delivers 4.7% 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, Core i9-11900K is the stronger fit. You are getting 0.3% better PassMark, backed by 8 cores and 16 threads.

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

Core i9-11900K is the better buy right now. Core i9-11900K comes in at an unclear MSRP at $539 MSRP versus unclear MSRP, and it still gives you a 4.7% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (46.4 vs 0.0 PassMark/$), 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 i9-11900K makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2021 vs 2019) and more multi-core headroom with 8 cores / 16 threads instead of 18/36. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core i9-11900K vs Xeon Gold 6240 Technical Specifications

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

Core i9-11900K

The Core i9-11900K is manufactured by Intel. It was released in 16 March 2021 (4 years ago). It is based on the Rocket Lake (2021) architecture. It features 8 cores and 16 threads. Base frequency is 3.5 GHz, with boost up to 5.2 GHz. L3 cache: 16 MB (total). L2 cache: 512 kB (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 125 Watt. Memory support: DDR4. Passmark benchmark score: 24,990 points. Launch price was $539.

Xeon Gold 6240

The Xeon Gold 6240 is manufactured by Intel. It was released in 2 April 2019 (6 years ago). It is based on the Cascade Lake (2019−2020) architecture. It features 18 cores and 36 threads. Base frequency is 2.6 GHz, with boost up to 3.9 GHz. L3 cache: 24.75 MB. L2 cache: 18 MB. Built on 14 nm process technology. Socket: LGA3647. Thermal design power (TDP): 150 Watt. Memory support: DDR4-2933. Passmark benchmark score: 24,918 points. Launch price was $2,445.

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Processing Power

The Core i9-11900K packs 8 cores / 16 threads, while the Xeon Gold 6240 offers 18 cores / 36 threads — the Xeon Gold 6240 has 10 more cores. Boost clocks reach 5.2 GHz on the Core i9-11900K versus 3.9 GHz on the Xeon Gold 6240 — a 28.6% clock advantage for the Core i9-11900K (base: 3.5 GHz vs 2.6 GHz). The Core i9-11900K uses the Rocket Lake (2021) architecture (14 nm), while the Xeon Gold 6240 uses Cascade Lake (2019−2020) (14 nm). In PassMark, the Core i9-11900K scores 24,990 against the Xeon Gold 6240's 24,918 — a 0.3% lead for the Core i9-11900K. L3 cache: 16 MB (total) on the Core i9-11900K vs 24.75 MB on the Xeon Gold 6240.

Feature	Core i9-11900K	Xeon Gold 6240
Cores / Threads	8 / 16	18 / 36+125%
Boost Clock	5.2 GHz+33%	3.9 GHz
Base Clock	3.5 GHz+35%	2.6 GHz
L3 Cache	16 MB (total)	24.75 MB+55%
L2 Cache	512 kB (per core)	18 MB+3500%
Process	14 nm	14 nm
Architecture	Rocket Lake (2021)	Cascade Lake (2019−2020)
PassMark	24,990	24,918

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Memory & Platform

The Core i9-11900K uses the LGA1200 socket (PCIe 4.0), while the Xeon Gold 6240 uses LGA3647 (PCIe 3.0) — making them incompatible on the same motherboard.