Opteron 6366 HE vs Xeon E3-1240L v3

Opteron 6366 HE vs Xeon E3-1240L v3 Performance Spectrum

Opteron 6366 HE

16 / 16

5,613

0.0%

Ryzen Embedded R1305G

Ryzen Threadripper PRO 3975WX

Ryzen Threadripper PRO 7965WX

Xeon E3-1240L v3

4 / 8

5,681

+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.

Opteron 6366 HE vs Xeon E3-1240L 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.

Opteron 6366 HE vs Xeon E3-1240L v3: Pros, Cons & Final Verdict

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

Opteron 6366 HE

2012

Why buy it

Trade-offs

❌Lower PassMark (5,613 vs 5,681).
❌240% higher power demand at 85W vs 25W.

Xeon E3-1240L v3

2014

Why buy it

✅+1.2% higher PassMark.
✅Draws 25W instead of 85W, a 60W reduction.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is Xeon E3-1240L v3 better than Opteron 6366 HE?

It depends on what you want from the system. For gaming, Opteron 6366 HE is ahead with a 2.9% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Xeon E3-1240L v3 pulls ahead with 1.2% better PassMark.

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

For streaming, content creation, and heavier multitasking, Xeon E3-1240L v3 is the stronger fit. You are getting 1.2% better PassMark, backed by 4 cores and 8 threads.

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

Xeon E3-1240L v3 still makes the most sense overall. Xeon E3-1240L v3 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 1.2% better PassMark.

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

Xeon E3-1240L v3 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2014 vs 2012) and more multi-core headroom with 4 cores / 8 threads instead of 16/16. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Opteron 6366 HE vs Xeon E3-1240L v3 Technical Specifications

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

Opteron 6366 HE

The Opteron 6366 HE is manufactured by AMD. It was released in 2015-01-01. It is based on the Abu Dhabi (2012) architecture. It features 16 cores and 16 threads. Base frequency is 1.8 GHz, with boost up to 3.1 GHz. L3 cache: 8 MB (total). L2 cache: 16 MB. Built on 32 nm process technology. Socket: G34. Thermal design power (TDP): 85 Watt. Memory support: DDR3. Passmark benchmark score: 5,613 points. Launch price was $800.

Xeon E3-1240L v3

The Xeon E3-1240L v3 is manufactured by Intel. It was released in 11 May 2014 (11 years ago). It is based on the Haswell-WS (2013−2014) architecture. It features 4 cores and 8 threads. Base frequency is 2 GHz, with boost up to 3 GHz. L3 cache: 8 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA1150. Thermal design power (TDP): 25 Watt. Memory support: DDR3L-1333, DDR3L-1600. Passmark benchmark score: 5,681 points. Launch price was $278.

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Processing Power

The Opteron 6366 HE packs 16 cores / 16 threads, while the Xeon E3-1240L v3 offers 4 cores / 8 threads — the Opteron 6366 HE has 12 more cores. Boost clocks reach 3.1 GHz on the Opteron 6366 HE versus 3 GHz on the Xeon E3-1240L v3 — a 3.3% clock advantage for the Opteron 6366 HE (base: 1.8 GHz vs 2 GHz). The Opteron 6366 HE uses the Abu Dhabi (2012) architecture (32 nm), while the Xeon E3-1240L v3 uses Haswell-WS (2013−2014) (22 nm). In PassMark, the Opteron 6366 HE scores 5,613 against the Xeon E3-1240L v3's 5,681 — a 1.2% lead for the Xeon E3-1240L v3. Both processors carry 8 MB (total) of L3 cache.

Feature	Opteron 6366 HE	Xeon E3-1240L v3
Cores / Threads	16 / 16+300%	4 / 8
Boost Clock	3.1 GHz+3%	3 GHz
Base Clock	1.8 GHz	2 GHz+11%
L3 Cache	8 MB (total)	8 MB (total)
L2 Cache	16 MB	256K (per core)+1500%
Process	32 nm	22 nm-31%
Architecture	Abu Dhabi (2012)	Haswell-WS (2013−2014)
PassMark	5,613	5,681+1%

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Memory & Platform

The Opteron 6366 HE uses the G34 socket (PCIe 2.0), while the Xeon E3-1240L v3 uses LGA1150 (PCIe 3.0) — making them incompatible on the same motherboard.