Core i7-1355U vs Xeon E5-4660 v3

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.

Core i7-1355U vs Xeon E5-4660 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.

Core i7-1355U vs Xeon E5-4660 v3: Pros, Cons & Final Verdict

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

Core i7-1355U

2023

Why buy it

✅Better for gaming: +17.7% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 15W instead of 120W, a 105W reduction.
✅Newer platform on FCBGA1744 with DDR5 support instead of LGA2011 and DDR4.

Trade-offs

❌Lower PassMark (14,116 vs 14,167).
❌Smaller total L3 cache (12 MB vs 35 MB).
❌Less compelling for workstation-style loads than Xeon E5-4660 v3, which brings 14 cores / 28 threads.

Xeon E5-4660 v3

2015

Why buy it

✅+0.4% higher PassMark.
✅+191.7% larger total L3 cache (35 MB vs 12 MB).
✅Better for workstations and heavier parallel workloads: 14 cores / 28 threads.

Trade-offs

❌Worse for gaming: lower average FPS than Core i7-1355U across 50 shared CPU benchmark tests.
❌700% higher power demand at 120W vs 15W.
❌Older platform position on LGA2011 with DDR4, while Core i7-1355U moves to FCBGA1744 and DDR5.

Quick Answers

So, is Core i7-1355U better than Xeon E5-4660 v3?

Not really, because they are built for different jobs. Xeon E5-4660 v3 makes more sense for workstation-style multi-core throughput, while Core i7-1355U 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 E5-4660 v3 is the stronger fit. You are getting 0.4% better PassMark, backed by 14 cores and 28 threads. It also has the larger cache pool with 191.7% larger total L3 cache (35 MB vs 12 MB).

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

Core i7-1355U still makes the most sense overall. Core i7-1355U comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 17.7% average FPS lead across 50 shared CPU game tests in our data.

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

Core i7-1355U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2015) and a healthier platform with FCBGA1744 and DDR5 instead of LGA2011. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i7-1355U vs Xeon E5-4660 v3 Technical Specifications

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

Core i7-1355U

The Core i7-1355U is manufactured by Intel. It was released in 4 January 2023 (2 years ago). It is based on the Raptor Lake-U (2023) architecture. It features 10 cores and 12 threads. Base frequency is 1.7 GHz, with boost up to 5 GHz. L3 cache: 12 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: FCBGA1744. Thermal design power (TDP): 15 Watt. Memory support: DDR5-5200, DDR4-3200, LPDDR4x-4267. Passmark benchmark score: 14,116 points. Launch price was $469.

Xeon E5-4660 v3

The Xeon E5-4660 v3 is manufactured by Intel. It was released in 2015-01-01. It is based on the Haswell-EP (2014−2015) architecture. It features 14 cores and 28 threads. Base frequency is 2.1 GHz, with boost up to 2.9 GHz. L3 cache: 35 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA2011. Thermal design power (TDP): 120 Watt. Memory support: DDR4. Passmark benchmark score: 14,167 points. Launch price was $800.

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Processing Power

The Core i7-1355U packs 10 cores / 12 threads, while the Xeon E5-4660 v3 offers 14 cores / 28 threads — the Xeon E5-4660 v3 has 4 more cores. Boost clocks reach 5 GHz on the Core i7-1355U versus 2.9 GHz on the Xeon E5-4660 v3 — a 53.2% clock advantage for the Core i7-1355U (base: 1.7 GHz vs 2.1 GHz). The Core i7-1355U uses the Raptor Lake-U (2023) architecture (Intel 7 nm), while the Xeon E5-4660 v3 uses Haswell-EP (2014−2015) (22 nm). In PassMark, the Core i7-1355U scores 14,116 against the Xeon E5-4660 v3's 14,167 — a 0.4% lead for the Xeon E5-4660 v3. L3 cache: 12 MB (total) on the Core i7-1355U vs 35 MB (total) on the Xeon E5-4660 v3.

Feature	Core i7-1355U	Xeon E5-4660 v3
Cores / Threads	10 / 12	14 / 28+40%
Boost Clock	5 GHz+72%	2.9 GHz
Base Clock	1.7 GHz	2.1 GHz+24%
L3 Cache	12 MB (total)	35 MB (total)+192%
L2 Cache	1.25 MB (per core)	256K (per core)+20380%
Process	Intel 7 nm-68%	22 nm
Architecture	Raptor Lake-U (2023)	Haswell-EP (2014−2015)
PassMark	14,116	14,167

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Memory & Platform

The Core i7-1355U uses the FCBGA1744 socket (PCIe 5.0), while the Xeon E5-4660 v3 uses LGA2011 (PCIe 3.0) — making them incompatible on the same motherboard.