Core i7-8665U vs Xeon E5-1428L V2

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 i7-8665U vs Xeon E5-1428L V2 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 i7-8665U vs Xeon E5-1428L V2: Pros, Cons & Final Verdict

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

Core i7-8665U

2019

Why buy it

✅Draws 15W instead of 60W, a 45W reduction.

Trade-offs

❌Lower PassMark (6,202 vs 6,255).
❌Smaller total L3 cache (8 MB vs 15 MB).
❌Less compelling for workstation-style loads than Xeon E5-1428L V2, which brings 6 cores / 12 threads.

Xeon E5-1428L V2

2014

Why buy it

✅+0.9% higher PassMark.
✅+87.5% larger total L3 cache (15 MB vs 8 MB).
✅Better for workstations and heavier parallel workloads: 6 cores / 12 threads.

Trade-offs

❌Launch MSRP is still $494 MSRP, while Core i7-8665U mostly shows up through inconsistent older-market listings.
❌300% higher power demand at 60W vs 15W.

Quick Answers

So, is Core i7-8665U better than Xeon E5-1428L V2?

Not really, because they are built for different jobs. Xeon E5-1428L V2 makes more sense for workstation-style multi-core throughput, while Core i7-8665U 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 E5-1428L V2 is the stronger fit. You are getting 0.9% better PassMark, backed by 6 cores and 12 threads. It also has the larger cache pool with 87.5% larger total L3 cache (15 MB vs 8 MB).

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

Core i7-8665U is still the faster CPU overall, but Xeon E5-1428L V2 is easier to justify if budget matters more than peak performance. Core i7-8665U comes in at an unclear MSRP at unclear MSRP versus $494 MSRP, and it still gives you a 1.9% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Xeon E5-1428L V2 is still stronger for heavier multi-core work with 0.9% better PassMark. Xeon E5-1428L V2 is also 100.0% better value on MSRP (12.7 vs 0.0 PassMark/$), which is why it can still make sense for tighter-budget builds on paper.

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

Core i7-8665U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2019 vs 2014). That makes it the safer long-term bet.

Core i7-8665U vs Xeon E5-1428L V2 Technical Specifications

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

Core i7-8665U

The Core i7-8665U is manufactured by Intel. It was released in 1 October 2018 (7 years ago). It is based on the Whiskey Lake-U (2018−2019) architecture. It features 4 cores and 8 threads. Base frequency is 1.9 GHz, with boost up to 4.8 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: FCBGA1528. Thermal design power (TDP): 15 Watt. Memory support: DDR4. Passmark benchmark score: 6,202 points. Launch price was $409.

Xeon E5-1428L V2

The Xeon E5-1428L V2 is manufactured by Intel. It was released in 2015-01-01. It is based on the Ivy Bridge-EN (2013−2014) architecture. It features 6 cores and 12 threads. Base frequency is 2.2 GHz, with boost up to 2.7 GHz. L3 cache: 15 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA1356. Thermal design power (TDP): 60 Watt. Memory support: DDR3-1333. Passmark benchmark score: 6,255 points. Launch price was $800.

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Processing Power

The Core i7-8665U packs 4 cores / 8 threads, while the Xeon E5-1428L V2 offers 6 cores / 12 threads — the Xeon E5-1428L V2 has 2 more cores. Boost clocks reach 4.8 GHz on the Core i7-8665U versus 2.7 GHz on the Xeon E5-1428L V2 — a 56% clock advantage for the Core i7-8665U (base: 1.9 GHz vs 2.2 GHz). The Core i7-8665U uses the Whiskey Lake-U (2018−2019) architecture (14 nm), while the Xeon E5-1428L V2 uses Ivy Bridge-EN (2013−2014) (22 nm). In PassMark, the Core i7-8665U scores 6,202 against the Xeon E5-1428L V2's 6,255 — a 0.9% lead for the Xeon E5-1428L V2. L3 cache: 8 MB (total) on the Core i7-8665U vs 15 MB (total) on the Xeon E5-1428L V2.

Feature	Core i7-8665U	Xeon E5-1428L V2
Cores / Threads	4 / 8	6 / 12+50%
Boost Clock	4.8 GHz+78%	2.7 GHz
Base Clock	1.9 GHz	2.2 GHz+16%
L3 Cache	8 MB (total)	15 MB (total)+88%
L2 Cache	256 kB (per core)	256K (per core)
Process	14 nm-36%	22 nm
Architecture	Whiskey Lake-U (2018−2019)	Ivy Bridge-EN (2013−2014)
PassMark	6,202	6,255

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Memory & Platform

The Core i7-8665U uses the FCBGA1528 socket (PCIe 3.0), while the Xeon E5-1428L V2 uses LGA1356 (PCIe 3.0) — making them incompatible on the same motherboard.