Core i5-10400F vs Xeon D-2166NT

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.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, productivity performance, platform differences, power efficiency, pricing context, and upgrade path so you can see which CPU actually makes more sense.

Core i5-10400F

2020

Why buy it

✅Better for gaming: +5.0% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 65W instead of 85W, a 20W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Xeon D-2166NT.

Trade-offs

❌Lower PassMark (13,029 vs 15,105).
❌Smaller total L3 cache (12 MB vs 17 MB).
❌Less compelling for workstation-style loads than Xeon D-2166NT, which brings 12 cores / 24 threads.
❌Launch MSRP is still $160 MSRP, while Xeon D-2166NT mostly shows up through inconsistent older-market listings.

Xeon D-2166NT

2018

Why buy it

✅+15.9% higher PassMark.
✅+37.5% larger total L3 cache (17 MB vs 12 MB).
✅Better for workstations and heavier parallel workloads: 12 cores / 24 threads.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-10400F across 50 shared CPU benchmark tests.
❌30.8% higher power demand at 85W vs 65W.
❌No boxed cooler included, unlike Core i5-10400F.

Core i5-10400F

2020

Xeon D-2166NT

2018

Why buy it

✅Better for gaming: +5.0% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 65W instead of 85W, a 20W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Xeon D-2166NT.

Why buy it

✅+15.9% higher PassMark.
✅+37.5% larger total L3 cache (17 MB vs 12 MB).
✅Better for workstations and heavier parallel workloads: 12 cores / 24 threads.

Trade-offs

❌Lower PassMark (13,029 vs 15,105).
❌Smaller total L3 cache (12 MB vs 17 MB).
❌Less compelling for workstation-style loads than Xeon D-2166NT, which brings 12 cores / 24 threads.
❌Launch MSRP is still $160 MSRP, while Xeon D-2166NT mostly shows up through inconsistent older-market listings.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-10400F across 50 shared CPU benchmark tests.
❌30.8% higher power demand at 85W vs 65W.
❌No boxed cooler included, unlike Core i5-10400F.

Quick Answers

So, is Core i5-10400F better than Xeon D-2166NT?

Not in a simple one-size-fits-all way. Xeon D-2166NT makes more sense for workstation-style multi-core throughput, while Core i5-10400F is the better mainstream desktop choice for gaming, platform cost, and day-to-day practicality.

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

For streaming, content creation, and heavier multitasking, Xeon D-2166NT is the better fit. You are getting 15.9% better PassMark, backed by 12 cores and 24 threads. It also carries the larger cache pool with 37.5% larger total L3 cache (17 MB vs 12 MB).

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

Core i5-10400F is the smarter buy today. Core i5-10400F is at an unclear MSRP at $160 MSRP versus unclear MSRP, and it gives you a 5.0% average FPS lead across 50 shared CPU game tests in our data. The trade-off is that Xeon D-2166NT is still stronger for heavier multi-core work with 15.9% better PassMark. It is also 100.0% better value on MSRP (81.4 vs 0.0 PassMark/$), so the better CPU is not just faster, it is also the cleaner value play on paper.

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

Core i5-10400F is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2020 vs 2018). That makes it the safer long-term pick.

Games Benchmarks

Paired with RTX 4090

To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.

Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.

Core i5-10400F Benchmark Check

Xeon D-2166NT Benchmark Check

Path of Exile 2

Preset	Core i5-10400F	Xeon D-2166NT
1080p
low	192 FPS	171 FPS
medium	152 FPS	135 FPS
high	123 FPS	109 FPS
ultra	100 FPS	87 FPS
1440p
low	153 FPS	138 FPS
medium	119 FPS	108 FPS
high	97 FPS	86 FPS
ultra	79 FPS	68 FPS
4K
low	82 FPS	65 FPS
medium	70 FPS	55 FPS
high	55 FPS	43 FPS
ultra	43 FPS	34 FPS

Open Core i5-10400F Open Xeon D-2166NT

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-10400F	Xeon D-2166NT
1080p
low	326 FPS	141 FPS
medium	318 FPS	125 FPS
high	290 FPS	113 FPS
ultra	253 FPS	90 FPS
1440p
low	326 FPS	125 FPS
medium	292 FPS	113 FPS
high	267 FPS	102 FPS
ultra	234 FPS	81 FPS
4K
low	309 FPS	91 FPS
medium	258 FPS	85 FPS
high	235 FPS	75 FPS
ultra	199 FPS	58 FPS

Open Core i5-10400F Open Xeon D-2166NT

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-10400F	Xeon D-2166NT
1080p
low	326 FPS	378 FPS
medium	326 FPS	378 FPS
high	326 FPS	378 FPS
ultra	326 FPS	378 FPS
1440p
low	326 FPS	378 FPS
medium	326 FPS	378 FPS
high	326 FPS	366 FPS
ultra	326 FPS	318 FPS
4K
low	326 FPS	378 FPS
medium	326 FPS	305 FPS
high	289 FPS	258 FPS
ultra	229 FPS	207 FPS

Open Core i5-10400F Open Xeon D-2166NT

League of Legends

League of Legends

Valorant

Preset	Core i5-10400F	Xeon D-2166NT
1080p
low	326 FPS	378 FPS
medium	326 FPS	378 FPS
high	326 FPS	378 FPS
ultra	326 FPS	378 FPS
1440p
low	326 FPS	378 FPS
medium	326 FPS	378 FPS
high	326 FPS	378 FPS
ultra	326 FPS	378 FPS
4K
low	326 FPS	378 FPS
medium	326 FPS	378 FPS
high	326 FPS	357 FPS
ultra	326 FPS	306 FPS

Open Core i5-10400F Open Xeon D-2166NT

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-10400F and Xeon D-2166NT

Core i5-10400F

The Core i5-10400F is manufactured by Intel. It was released in 30 April 2020 (5 years ago). It is based on the Comet Lake (2020−2025) architecture. It features 6 cores and 12 threads. Base frequency is 2.9 GHz, with boost up to 4.3 GHz. L3 cache: 12 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 65 Watt. Memory support: DDR4. Passmark benchmark score: 13,029 points. Launch price was $155.

Xeon D-2166NT

The Xeon D-2166NT is manufactured by Intel. It was released in 7 February 2018 (7 years ago). It is based on the Skylake (server) (2017−2018) architecture. It features 12 cores and 24 threads. Base frequency is 2 GHz, with boost up to 3 GHz. L3 cache: 16.5 MB. L2 cache: 12 MB. Built on 14 nm process technology. Socket: FCBGA2518. Thermal design power (TDP): 85 Watt. Memory support: DDR4. Passmark benchmark score: 15,105 points. Launch price was $1,005.

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Processing Power

The Core i5-10400F packs 6 cores / 12 threads, while the Xeon D-2166NT offers 12 cores / 24 threads — the Xeon D-2166NT has 6 more cores. Boost clocks reach 4.3 GHz on the Core i5-10400F versus 3 GHz on the Xeon D-2166NT — a 35.6% clock advantage for the Core i5-10400F (base: 2.9 GHz vs 2 GHz). The Core i5-10400F uses the Comet Lake (2020−2025) architecture (14 nm), while the Xeon D-2166NT uses Skylake (server) (2017−2018) (14 nm). In PassMark, the Core i5-10400F scores 13,029 against the Xeon D-2166NT's 15,105 — a 14.8% lead for the Xeon D-2166NT. L3 cache: 12 MB (total) on the Core i5-10400F vs 16.5 MB on the Xeon D-2166NT.

Feature	Core i5-10400F	Xeon D-2166NT
Cores / Threads	6 / 12	12 / 24+100%
Boost Clock	4.3 GHz+43%	3 GHz
Base Clock	2.9 GHz+45%	2 GHz
L3 Cache	12 MB (total)	16.5 MB+38%
L2 Cache	256K (per core)	12 MB+4700%
Process	14 nm	14 nm
Architecture	Comet Lake (2020−2025)	Skylake (server) (2017−2018)
PassMark	13,029	15,105+16%
Cinebench R23 Multi	8,191	—
Geekbench 6 Single	1,454	—
Geekbench 6 Multi	5,783	—

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Memory & Platform

The Core i5-10400F uses the LGA1200 socket (PCIe 3.0), while the Xeon D-2166NT uses FCBGA2518 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i5-10400F	Xeon D-2166NT
Socket	LGA1200	FCBGA2518
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2666	—
Max RAM Capacity	128 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

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Advanced Features

Virtualization: VT-x, VT-d (Core i5-10400F) / not specified (Xeon D-2166NT). Primary use case: Core i5-10400F targets Gaming. Direct competitor: Core i5-10400F rivals Ryzen 5 3600.