Core i7-6700K vs Xeon E3-1240 v6

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 i7-6700K vs Xeon E3-1240 v6 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 i7-6700K vs Xeon E3-1240 v6: Pros, Cons & Final Verdict

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

Core i7-6700K

2015

Why buy it

✅Better for gaming: +5.6% higher average FPS across 50 shared CPU benchmark tests.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with HD Graphics 530, while Xeon E3-1240 v6 needs a discrete GPU.

Trade-offs

❌Launch MSRP is still $350 MSRP, while Xeon E3-1240 v6 mostly shows up through inconsistent older-market listings.
❌26.4% higher power demand at 91W vs 72W.

Xeon E3-1240 v6

2017

Why buy it

✅Draws 72W instead of 91W, a 19W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Core i7-6700K across 50 shared CPU benchmark tests.
❌Lower PassMark (8,731 vs 8,933).
❌No integrated graphics, while Core i7-6700K can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i7-6700K better than Xeon E3-1240 v6?

Not really, because they are built for different jobs. Xeon E3-1240 v6 makes more sense for workstation-style multi-core throughput, while Core i7-6700K 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 i7-6700K is the better pick. According to our tests, it delivers 5.6% 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 i7-6700K is the stronger fit. You are getting 2.3% better PassMark, backed by 4 cores and 8 threads.

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

Core i7-6700K is the better buy right now. Core i7-6700K comes in at an unclear MSRP at $350 MSRP versus unclear MSRP, and it still gives you a 5.6% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (25.5 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Xeon E3-1240 v6 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2017 vs 2015). That makes it the safer long-term bet.

Core i7-6700K vs Xeon E3-1240 v6 Technical Specifications

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

Core i7-6700K

The Core i7-6700K is manufactured by Intel. It was released in 5 August 2015 (10 years ago). It is based on the Skylake (2015−2016) architecture. It features 4 cores and 8 threads. Base frequency is 4 GHz, with boost up to 4.2 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 91 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 8,933 points. Launch price was $339.

Xeon E3-1240 v6

The Xeon E3-1240 v6 is manufactured by Intel. It was released in 28 March 2017 (8 years ago). It is based on the Kaby Lake (2016−2019) architecture. It features 4 cores and 8 threads. Base frequency is 3.7 GHz, with boost up to 4.1 GHz. L3 cache: 8 MB. L2 cache: 1 MB. Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 72 Watt. Memory support: DDR4-2400, DDR3L-1866. Passmark benchmark score: 8,731 points. Launch price was $272.

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Processing Power

Both the Core i7-6700K and Xeon E3-1240 v6 share an identical 4-core/8-thread configuration. Boost clocks reach 4.2 GHz on the Core i7-6700K versus 4.1 GHz on the Xeon E3-1240 v6 — a 2.4% clock advantage for the Core i7-6700K (base: 4 GHz vs 3.7 GHz). The Core i7-6700K uses the Skylake (2015−2016) architecture (14 nm), while the Xeon E3-1240 v6 uses Kaby Lake (2016−2019) (14 nm). In PassMark, the Core i7-6700K scores 8,933 against the Xeon E3-1240 v6's 8,731 — a 2.3% lead for the Core i7-6700K. L3 cache: 8 MB (total) on the Core i7-6700K vs 8 MB on the Xeon E3-1240 v6.

Feature	Core i7-6700K	Xeon E3-1240 v6
Cores / Threads	4 / 8	4 / 8
Boost Clock	4.2 GHz+2%	4.1 GHz
Base Clock	4 GHz+8%	3.7 GHz
L3 Cache	8 MB (total)	8 MB
L2 Cache	256 kB (per core)	1 MB+300%
Process	14 nm	14 nm
Architecture	Skylake (2015−2016)	Kaby Lake (2016−2019)
PassMark	8,933+2%	8,731

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Memory & Platform

Both processors use the LGA1151 socket with PCIe 3.0.

Feature	Core i7-6700K	Xeon E3-1240 v6
Socket	LGA1151	LGA1151
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2133	—
Max RAM Capacity	64 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

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Advanced Features

Virtualization: VT-x, VT-d (Core i7-6700K) / not specified (Xeon E3-1240 v6). The Core i7-6700K includes integrated graphics (HD Graphics 530), while the Xeon E3-1240 v6 requires a dedicated GPU. Primary use case: Core i7-6700K targets Desktop.