Xeon E3-1270 v5 vs Xeon E5-2665

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 E3-1270 v5 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.

Xeon E3-1270 v5 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.

Xeon E3-1270 v5

2015

Why buy it

✅Draws 80W instead of 115W, a 35W reduction.

Trade-offs

❌Smaller total L3 cache (8 MB vs 20 MB).
❌No AVX-512 support for niche heavy compute workloads where it can matter.

Xeon E5-2665

2012

Why buy it

✅+150% larger total L3 cache (20 MB vs 8 MB).
✅100+% more PCIe lanes (40 vs 0) for storage and expansion-heavy builds.
✅AVX-512 support for select workstation, AI, and scientific workloads.

Trade-offs

❌Lower PassMark (8,293 vs 8,318).
❌43.8% higher power demand at 115W vs 80W.

Quick Answers

So, is Xeon E3-1270 v5 better than Xeon E5-2665?

Yes. Xeon E3-1270 v5 is the better all-around CPU here. It gives you a 2.5% average FPS lead across 50 shared CPU game tests in our data, 0.3% 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, Xeon E3-1270 v5 is the better pick. According to our tests, it delivers 2.5% 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, Xeon E3-1270 v5 is the stronger fit. You are getting 0.3% better PassMark, backed by 4 cores and 8 threads.

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

Xeon E3-1270 v5 still makes the most sense overall. Xeon E3-1270 v5 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 2.5% average FPS lead across 50 shared CPU game tests in our data.

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

Xeon E3-1270 v5 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2012) and more multi-core headroom with 4 cores / 8 threads instead of 8/16. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Xeon E3-1270 v5 vs Xeon E5-2665 Technical Specifications

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

Xeon E3-1270 v5

The Xeon E3-1270 v5 is manufactured by Intel. It was released in 19 October 2015 (10 years ago). It is based on the Skylake-DT (2015) architecture. It features 4 cores and 8 threads. Base frequency is 3.6 GHz, with boost up to 4 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 80 Watt. Memory support: DDR4-1866/2133, DDR3L-1333/1600. Passmark benchmark score: 8,318 points. Launch price was $339.

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.

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Processing Power

The Xeon E3-1270 v5 packs 4 cores / 8 threads, while the Xeon E5-2665 offers 8 cores / 16 threads — the Xeon E5-2665 has 4 more cores. Boost clocks reach 4 GHz on the Xeon E3-1270 v5 versus 3.1 GHz on the Xeon E5-2665 — a 25.4% clock advantage for the Xeon E3-1270 v5 (base: 3.6 GHz vs 2.4 GHz). The Xeon E3-1270 v5 uses the Skylake-DT (2015) architecture (14 nm), while the Xeon E5-2665 uses Sandy Bridge-EP (2012) (32 nm). In PassMark, the Xeon E3-1270 v5 scores 8,318 against the Xeon E5-2665's 8,293 — a 0.3% lead for the Xeon E3-1270 v5. L3 cache: 8 MB (total) on the Xeon E3-1270 v5 vs 20480 kB (total) on the Xeon E5-2665.

Feature	Xeon E3-1270 v5	Xeon E5-2665
Cores / Threads	4 / 8	8 / 16+100%
Boost Clock	4 GHz+29%	3.1 GHz
Base Clock	3.6 GHz+50%	2.4 GHz
L3 Cache	8 MB (total)	20480 kB (total)+150%
L2 Cache	256 kB (per core)	256 kB (per core)
Process	14 nm-56%	32 nm
Architecture	Skylake-DT (2015)	Sandy Bridge-EP (2012)
PassMark	8,318	8,293

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Memory & Platform

The Xeon E3-1270 v5 uses the LGA1151 socket (PCIe 3.0), while the Xeon E5-2665 uses LGA2011 (PCIe 5.0) — making them incompatible on the same motherboard.

Feature	Xeon E3-1270 v5	Xeon E5-2665
Socket	LGA1151	LGA2011
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	—	DDR3-1600
Max RAM Capacity	—	384 GB
RAM Channels	—	4
ECC Support	—	Yes
PCIe Lanes	—	40