Ryzen 5 2600X vs Xeon E5-2666 V3

Ryzen 5 2600X vs Xeon E5-2666 V3 Performance Spectrum

Ryzen 5 2600X

6 / 12

13,880

0.0%

Ryzen Threadripper 2990WX

Ryzen Threadripper PRO 7945WX

Ryzen Threadripper PRO 9955WX

Ryzen Threadripper 9960X

Xeon E5-2666 V3

10 / 20

14,044

+1.2%

About PassMark

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.

Ryzen 5 2600X 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.

Ryzen 5 2600X 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.

Ryzen 5 2600X

2018

Why buy it

✅Better for gaming: +7.0% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 95W instead of 135W, a 40W reduction.
✅100+% more PCIe lanes (24 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Xeon E5-2666 V3.

Trade-offs

❌Lower PassMark (13,880 vs 14,044).
❌Smaller total L3 cache (16 MB vs 25 MB).
❌Less compelling for workstation-style loads than Xeon E5-2666 V3, which brings 10 cores / 20 threads.
❌Launch MSRP is still $229 MSRP, while Xeon E5-2666 V3 mostly shows up through inconsistent older-market listings.

Xeon E5-2666 V3

2014

Why buy it

✅+1.2% higher PassMark.
✅+56.3% larger total L3 cache (25 MB vs 16 MB).
✅Better for workstations and heavier parallel workloads: 10 cores / 20 threads.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 5 2600X across 50 shared CPU benchmark tests.
❌42.1% higher power demand at 135W vs 95W.
❌No boxed cooler included, unlike Ryzen 5 2600X.

Quick Answers

So, is Ryzen 5 2600X better than Xeon E5-2666 V3?

Not really, because they are built for different jobs. Xeon E5-2666 V3 makes more sense for workstation-style multi-core throughput, while Ryzen 5 2600X is the more practical desktop choice for gaming, platform cost, and everyday use.

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 1.2% better PassMark, backed by 10 cores and 20 threads. It also has the larger cache pool with 56.3% larger total L3 cache (25 MB vs 16 MB).

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

Ryzen 5 2600X is the better buy right now. Ryzen 5 2600X comes in at an unclear MSRP at $229 MSRP versus unclear MSRP, and it still gives you a 7.0% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Xeon E5-2666 V3 is still stronger for heavier multi-core work with 1.2% better PassMark. It is also 100.0% better value on MSRP (60.6 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Ryzen 5 2600X makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2018 vs 2014). That makes it the safer long-term bet.

Ryzen 5 2600X vs Xeon E5-2666 V3 Technical Specifications

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

Ryzen 5 2600X

The Ryzen 5 2600X is manufactured by AMD. It was released in 19 April 2018 (7 years ago). It is based on the Zen+ (2018−2019) architecture. It features 6 cores and 12 threads. Base frequency is 3.6 GHz, with boost up to 4.25 GHz. L3 cache: 16 MB (total). L2 cache: 512K (per core). Built on 12 nm process technology. Socket: AM4. Thermal design power (TDP): 95 Watt. Memory support: DDR4 Dual-channel. Passmark benchmark score: 13,880 points. Launch price was $229.

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.

⚡

Processing Power

The Ryzen 5 2600X 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 4.25 GHz on the Ryzen 5 2600X versus 3.5 GHz on the Xeon E5-2666 V3 — a 19.4% clock advantage for the Ryzen 5 2600X (base: 3.6 GHz vs 2.9 GHz). The Ryzen 5 2600X uses the Zen+ (2018−2019) architecture (12 nm), while the Xeon E5-2666 V3 uses Haswell-EP (2014−2015) (22 nm). In PassMark, the Ryzen 5 2600X scores 13,880 against the Xeon E5-2666 V3's 14,044 — a 1.2% lead for the Xeon E5-2666 V3. L3 cache: 16 MB (total) on the Ryzen 5 2600X vs 25 MB (total) on the Xeon E5-2666 V3.

Feature	Ryzen 5 2600X	Xeon E5-2666 V3
Cores / Threads	6 / 12	10 / 20+67%
Boost Clock	4.25 GHz+21%	3.5 GHz
Base Clock	3.6 GHz+24%	2.9 GHz
L3 Cache	16 MB (total)	25 MB (total)+56%
L2 Cache	512K (per core)+100%	256K (per core)
Process	12 nm-45%	22 nm
Architecture	Zen+ (2018−2019)	Haswell-EP (2014−2015)
PassMark	13,880	14,044+1%
Cinebench R23 Multi	7,514	—
Geekbench 6 Single	1,242	—
Geekbench 6 Multi	5,247	—

🧠

Memory & Platform

The Ryzen 5 2600X uses the AM4 socket (PCIe 3.0), while the Xeon E5-2666 V3 uses LGA2011-3 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Ryzen 5 2600X	Xeon E5-2666 V3
Socket	AM4	LGA2011-3
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2933	—
Max RAM Capacity	64 GB	—
RAM Channels	2	—
ECC Support	Yes	—
PCIe Lanes	24	—

🔧

Advanced Features

Virtualization: AMD-V (Ryzen 5 2600X) / not specified (Xeon E5-2666 V3). Primary use case: Ryzen 5 2600X targets Gaming. Direct competitor: Ryzen 5 2600X rivals Core i5-9600K.