Opteron 6366 HE vs Xeon E3-1280

Opteron 6366 HE vs Xeon E3-1280 Performance Spectrum

Opteron 6366 HE

16 / 16

5,613

0.0%

Ryzen Embedded R1305G

Ryzen Threadripper PRO 3975WX

Ryzen Threadripper PRO 7965WX

Xeon E3-1280

4 / 8

5,612

0.0%

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 E3-1280 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 E3-1280: 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

✅Better for gaming: +4.4% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 85W instead of 95W, a 10W reduction.

Trade-offs

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

Xeon E3-1280

2011

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Opteron 6366 HE across 50 shared CPU benchmark tests.
❌Lower PassMark (5,612 vs 5,613).

Quick Answers

So, is Opteron 6366 HE better than Xeon E3-1280?

Yes. Opteron 6366 HE is the better all-around CPU here. It gives you a 4.4% average FPS lead across 50 shared CPU game tests in our data, 0% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Opteron 6366 HE is the better pick. According to our tests, it delivers 4.4% 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, Opteron 6366 HE is the stronger fit. You are getting 0% better PassMark, backed by 16 cores and 16 threads.

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

Opteron 6366 HE still makes the most sense overall. Opteron 6366 HE comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 4.4% average FPS lead across 50 shared CPU game tests in our data.

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

Opteron 6366 HE makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2012 vs 2011) and more multi-core headroom with 16 cores / 16 threads instead of 4/8. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Opteron 6366 HE vs Xeon E3-1280 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 E3-1280

The Xeon E3-1280 is manufactured by Intel. It was released in 3 April 2011 (14 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 4 cores and 8 threads. Base frequency is 3.5 GHz, with boost up to 3.9 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1155. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 5,612 points. Launch price was $450.

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Processing Power

The Opteron 6366 HE packs 16 cores / 16 threads, while the Xeon E3-1280 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 3.9 GHz on the Xeon E3-1280 — a 22.9% clock advantage for the Xeon E3-1280 (base: 1.8 GHz vs 3.5 GHz). The Opteron 6366 HE uses the Abu Dhabi (2012) architecture (32 nm), while the Xeon E3-1280 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Opteron 6366 HE scores 5,613 against the Xeon E3-1280's 5,612 — a 0% lead for the Opteron 6366 HE. Both processors carry 8 MB (total) of L3 cache.

Feature	Opteron 6366 HE	Xeon E3-1280
Cores / Threads	16 / 16+300%	4 / 8
Boost Clock	3.1 GHz	3.9 GHz+26%
Base Clock	1.8 GHz	3.5 GHz+94%
L3 Cache	8 MB (total)	8 MB (total)
L2 Cache	16 MB+6300%	256 kB (per core)
Process	32 nm	32 nm
Architecture	Abu Dhabi (2012)	Sandy Bridge (2011−2013)
PassMark	5,613	5,612

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Memory & Platform

The Opteron 6366 HE uses the G34 socket (PCIe 2.0), while the Xeon E3-1280 uses LGA1155 (PCIe 2.0) — making them incompatible on the same motherboard.