Opteron 6386 SE vs Xeon E5-2665

Opteron 6386 SE vs Xeon E5-2665 Performance Spectrum

Opteron 6386 SE

16 / 16

8,291

0.0%

Ryzen Threadripper PRO 7965WX

Xeon E5-2665

8 / 16

8,293

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 6386 SE vs Xeon E5-2665 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 6386 SE vs Xeon E5-2665: Pros, Cons & Final Verdict

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

Opteron 6386 SE

2012

Why buy it

Trade-offs

❌Lower PassMark (8,291 vs 8,293).
❌Smaller total L3 cache (8 MB vs 20 MB).
❌Launch MSRP is still $1,392 MSRP, while Xeon E5-2665 mostly shows up through inconsistent older-market listings.
❌21.7% higher power demand at 140W vs 115W.

Xeon E5-2665

2012

Why buy it

✅+0% higher PassMark.
✅+150% larger total L3 cache (20 MB vs 8 MB).
✅Draws 115W instead of 140W, a 25W reduction.
✅100+% more PCIe lanes (40 vs 0) for storage and expansion-heavy builds.

Trade-offs

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

Quick Answers

So, is Xeon E5-2665 better than Opteron 6386 SE?

It depends on what you want from the system. For gaming, Opteron 6386 SE is ahead with a 1.6% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Xeon E5-2665 pulls ahead with 0% better PassMark. Xeon E5-2665 also has the bigger cache pool with 150% larger total L3 cache (20 MB vs 8 MB).

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

For streaming, content creation, and heavier multitasking, Xeon E5-2665 is the stronger fit. You are getting 0% better PassMark, backed by 8 cores and 16 threads. It also has the larger cache pool with 150% larger total L3 cache (20 MB vs 8 MB).

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

Xeon E5-2665 is still the faster CPU overall, but Opteron 6386 SE is easier to justify if budget matters more than peak performance. Xeon E5-2665 comes in at an unclear MSRP at unclear MSRP versus $1,392 MSRP, and it still gives you 0% better PassMark. The compromise is that Opteron 6386 SE is still the better pure gaming CPU with a 1.6% average FPS lead across 50 shared CPU game tests in our data. Opteron 6386 SE is also 100.0% better value on MSRP (6.0 vs 0.0 PassMark/$), which is why it can still make sense for tighter-budget builds on paper.

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

Xeon E5-2665 makes more sense long term for 2026 and beyond. You are getting 150% larger total L3 cache (20 MB vs 8 MB), more multi-core headroom with 8 cores / 16 threads instead of 16/16, and AVX-512 support for heavier modern compute workloads. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Opteron 6386 SE vs Xeon E5-2665 Technical Specifications

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

Opteron 6386 SE

The Opteron 6386 SE is manufactured by AMD. It was released in 5 November 2012 (13 years ago). It is based on the Abu Dhabi (2012) architecture. It features 16 cores and 16 threads. Base frequency is 2.8 GHz, with boost up to 3.5 GHz. L3 cache: 8 MB (total). L2 cache: 16 MB. Built on 32 nm process technology. Socket: G34. Thermal design power (TDP): 140 Watt. Memory support: DDR3. Passmark benchmark score: 8,291 points. Launch price was $2,408.

Xeon E5-2665

The Xeon E5-2665 is manufactured by Intel. It was released in 6 March 2012 (13 years ago). It is based on the Sandy Bridge-EP (2012) architecture. It features 8 cores and 16 threads. Base frequency is 2.4 GHz, with boost up to 3.1 GHz. L3 cache: 20480 kB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA2011. Thermal design power (TDP): 115 Watt. Memory support: DDR3. Passmark benchmark score: 8,293 points. Launch price was $142.

⚡

Processing Power

The Opteron 6386 SE packs 16 cores / 16 threads, while the Xeon E5-2665 offers 8 cores / 16 threads — the Opteron 6386 SE has 8 more cores. Boost clocks reach 3.5 GHz on the Opteron 6386 SE versus 3.1 GHz on the Xeon E5-2665 — a 12.1% clock advantage for the Opteron 6386 SE (base: 2.8 GHz vs 2.4 GHz). The Opteron 6386 SE uses the Abu Dhabi (2012) architecture (32 nm), while the Xeon E5-2665 uses Sandy Bridge-EP (2012) (32 nm). In PassMark, the Opteron 6386 SE scores 8,291 against the Xeon E5-2665's 8,293 — a 0% lead for the Xeon E5-2665. L3 cache: 8 MB (total) on the Opteron 6386 SE vs 20480 kB (total) on the Xeon E5-2665.

Feature	Opteron 6386 SE	Xeon E5-2665
Cores / Threads	16 / 16+100%	8 / 16
Boost Clock	3.5 GHz+13%	3.1 GHz
Base Clock	2.8 GHz+17%	2.4 GHz
L3 Cache	8 MB (total)	20480 kB (total)+150%
L2 Cache	16 MB+6300%	256 kB (per core)
Process	32 nm	32 nm
Architecture	Abu Dhabi (2012)	Sandy Bridge-EP (2012)
PassMark	8,291	8,293

🧠

Memory & Platform

The Opteron 6386 SE uses the G34 socket (PCIe 2.0), while the Xeon E5-2665 uses LGA2011 (PCIe 5.0) — making them incompatible on the same motherboard.

Feature	Opteron 6386 SE	Xeon E5-2665
Socket	G34	LGA2011
PCIe Generation	PCIe 2.0	PCIe 5.0+150%
Max RAM Speed	—	DDR3-1600
Max RAM Capacity	—	384 GB
RAM Channels	—	4
ECC Support	—	Yes
PCIe Lanes	—	40