Xeon E-2236 vs Xeon E5-2666 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.

Xeon E-2236 vs Xeon E5-2666 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.

Xeon E-2236 vs Xeon E5-2666 V3: Pros, Cons & Final Verdict

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

Xeon E-2236

2019

Why buy it

✅Better for gaming: +5.2% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 80W instead of 135W, a 55W reduction.

Trade-offs

❌Lower PassMark (13,885 vs 14,044).
❌Smaller total L3 cache (12 MB vs 25 MB).

Xeon E5-2666 V3

2014

Why buy it

✅+1.1% higher PassMark.
✅+108.3% larger total L3 cache (25 MB vs 12 MB).

Trade-offs

❌Worse for gaming: lower average FPS than Xeon E-2236 across 50 shared CPU benchmark tests.
❌68.8% higher power demand at 135W vs 80W.

Quick Answers

So, is Xeon E-2236 better than Xeon E5-2666 V3?

It depends on what you want from the system. For gaming, Xeon E-2236 is ahead with a 5.2% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Xeon E5-2666 V3 pulls ahead with 1.1% better PassMark. Xeon E5-2666 V3 also has the bigger cache pool with 108.3% larger total L3 cache (25 MB vs 12 MB).

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

For streaming, content creation, and heavier multitasking, Xeon E5-2666 V3 is the stronger fit. You are getting 1.1% better PassMark, backed by 10 cores and 20 threads. It also has the larger cache pool with 108.3% larger total L3 cache (25 MB vs 12 MB).

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

Xeon E-2236 still makes the most sense overall. Xeon E-2236 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 5.2% average FPS lead across 50 shared CPU game tests in our data.

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

Xeon E-2236 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2019 vs 2014). That makes it the safer long-term bet.

Xeon E-2236 vs Xeon E5-2666 V3 Technical Specifications

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

Xeon E-2236

The Xeon E-2236 is manufactured by Intel. It was released in 29 May 2019 (6 years ago). It is based on the Coffee Lake-S WS (2018−2019) architecture. It features 6 cores and 12 threads. Base frequency is 3.4 GHz, with boost up to 4.8 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 80 Watt. Memory support: DDR4-2666. Passmark benchmark score: 13,885 points. Launch price was $284.

Xeon E5-2666 V3

The Xeon E5-2666 V3 is manufactured by Intel. It was released in 2015-01-01. It is based on the Haswell-EP (2014−2015) architecture. It features 10 cores and 20 threads. Base frequency is 2.9 GHz, with boost up to 3.5 GHz. L3 cache: 25 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA2011-3. Thermal design power (TDP): 135 Watt. Memory support: DDR3, DDR4 2133 MHz Quad-channel. Passmark benchmark score: 14,044 points. Launch price was $800.

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Processing Power

The Xeon E-2236 packs 6 cores / 12 threads, while the Xeon E5-2666 V3 offers 10 cores / 20 threads — the Xeon E5-2666 V3 has 4 more cores. Boost clocks reach 4.8 GHz on the Xeon E-2236 versus 3.5 GHz on the Xeon E5-2666 V3 — a 31.3% clock advantage for the Xeon E-2236 (base: 3.4 GHz vs 2.9 GHz). The Xeon E-2236 uses the Coffee Lake-S WS (2018−2019) architecture (14 nm), while the Xeon E5-2666 V3 uses Haswell-EP (2014−2015) (22 nm). In PassMark, the Xeon E-2236 scores 13,885 against the Xeon E5-2666 V3's 14,044 — a 1.1% lead for the Xeon E5-2666 V3. L3 cache: 12 MB (total) on the Xeon E-2236 vs 25 MB (total) on the Xeon E5-2666 V3.

Feature	Xeon E-2236	Xeon E5-2666 V3
Cores / Threads	6 / 12	10 / 20+67%
Boost Clock	4.8 GHz+37%	3.5 GHz
Base Clock	3.4 GHz+17%	2.9 GHz
L3 Cache	12 MB (total)	25 MB (total)+108%
L2 Cache	256 kB (per core)	256K (per core)
Process	14 nm-36%	22 nm
Architecture	Coffee Lake-S WS (2018−2019)	Haswell-EP (2014−2015)
PassMark	13,885	14,044+1%

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Memory & Platform

The Xeon E-2236 uses the LGA1151 socket (PCIe 3.0), while the Xeon E5-2666 V3 uses LGA2011-3 (PCIe 3.0) — making them incompatible on the same motherboard.