Core i7-8700K vs Xeon E5-2670 v3

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 i7-8700K vs Xeon E5-2670 v3 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 i7-8700K vs Xeon E5-2670 v3: Pros, Cons & Final Verdict

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

Core i7-8700K

2017

Why buy it

✅Better for gaming: +17.0% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 95W instead of 120W, a 25W reduction.
✅Integrated graphics onboard with Intel UHD Graphics 630, while Xeon E5-2670 v3 needs a discrete GPU.

Trade-offs

❌Smaller total L3 cache (12 MB vs 30 MB).
❌Less compelling for workstation-style loads than Xeon E5-2670 v3, which brings 12 cores / 24 threads and 40 PCIe lanes.
❌Launch MSRP is still $359 MSRP, while Xeon E5-2670 v3 mostly shows up through inconsistent older-market listings.

Xeon E5-2670 v3

2014

Why buy it

✅+150% larger total L3 cache (30 MB vs 12 MB).
✅Better for workstations and heavier parallel workloads: 12 cores / 24 threads, plus 40 PCIe lanes vs 16.
✅150% more PCIe lanes (40 vs 16) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Core i7-8700K across 50 shared CPU benchmark tests.
❌Lower PassMark (13,489 vs 13,572).
❌26.3% higher power demand at 120W vs 95W.
❌No integrated graphics, while Core i7-8700K can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i7-8700K better than Xeon E5-2670 v3?

Not really, because they are built for different jobs. Xeon E5-2670 v3 makes more sense for workstation-style multi-core throughput, while Core i7-8700K 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 i7-8700K is the better pick. According to our tests, it delivers 17.0% 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 i7-8700K is the stronger fit. You are getting 0.6% better PassMark, backed by 6 cores and 12 threads.

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

Core i7-8700K is the better buy right now. Core i7-8700K comes in at an unclear MSRP at $359 MSRP versus unclear MSRP, and it still gives you a 17.0% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (37.8 vs 0.0 PassMark/$), 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 i7-8700K makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2017 vs 2014) and more multi-core headroom with 6 cores / 12 threads instead of 12/24. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core i7-8700K vs Xeon E5-2670 v3 Technical Specifications

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

Core i7-8700K

The Core i7-8700K 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 12 threads. Base frequency is 3.7 GHz, with boost up to 4.7 GHz. L3 cache: 12288 kB. 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: 13,572 points. Launch price was $359.

Xeon E5-2670 v3

The Xeon E5-2670 v3 is manufactured by Intel. It was released in 8 September 2014 (11 years ago). It is based on the Haswell-EP (2014−2015) architecture. It features 12 cores and 24 threads. Base frequency is 2.3 GHz, with boost up to 3.1 GHz. L3 cache: 30 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA2011. Thermal design power (TDP): 120 Watt. Memory support: DDR4-1600, DDR4-1866, DDR4-2133. Passmark benchmark score: 13,489 points. Launch price was $1,589.

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Processing Power

The Core i7-8700K packs 6 cores / 12 threads, while the Xeon E5-2670 v3 offers 12 cores / 24 threads — the Xeon E5-2670 v3 has 6 more cores. Boost clocks reach 4.7 GHz on the Core i7-8700K versus 3.1 GHz on the Xeon E5-2670 v3 — a 41% clock advantage for the Core i7-8700K (base: 3.7 GHz vs 2.3 GHz). The Core i7-8700K uses the Coffee Lake-S (2017−2018) architecture (14 nm), while the Xeon E5-2670 v3 uses Haswell-EP (2014−2015) (22 nm). In PassMark, the Core i7-8700K scores 13,572 against the Xeon E5-2670 v3's 13,489 — a 0.6% lead for the Core i7-8700K. L3 cache: 12288 kB on the Core i7-8700K vs 30 MB (total) on the Xeon E5-2670 v3.

Feature	Core i7-8700K	Xeon E5-2670 v3
Cores / Threads	6 / 12	12 / 24+100%
Boost Clock	4.7 GHz+52%	3.1 GHz
Base Clock	3.7 GHz+61%	2.3 GHz
L3 Cache	12288 kB	30 MB (total)+150%
L2 Cache	256K (per core)	256K (per core)
Process	14 nm-36%	22 nm
Architecture	Coffee Lake-S (2017−2018)	Haswell-EP (2014−2015)
PassMark	13,572	13,489

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Memory & Platform

The Core i7-8700K uses the LGA1151 socket (PCIe 3.0), while the Xeon E5-2670 v3 uses LGA2011 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2666 on the Core i7-8700K versus DDR4-2133 on the Xeon E5-2670 v3 — the Core i7-8700K supports 25% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon E5-2670 v3 supports up to 768 GB of RAM compared to 128 GB — 500% more capacity for professional workloads. Memory channels: 2 (Core i7-8700K) vs 4 (Xeon E5-2670 v3). PCIe lanes: 16 (Core i7-8700K) vs 40 (Xeon E5-2670 v3) — the Xeon E5-2670 v3 offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel 300 series (Core i7-8700K) and Intel X99,Intel C612 (Xeon E5-2670 v3).

Feature	Core i7-8700K	Xeon E5-2670 v3
Socket	LGA1151	LGA2011
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2666+25%	DDR4-2133
Max RAM Capacity	128 GB	768 GB+500%
RAM Channels	2	4+100%
ECC Support	No	Yes
PCIe Lanes	16	40+150%