Core i5-10400F vs Pentium 3825U

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: +617.9% higher average FPS across 4 shared CPU benchmark tests.
✅+500% larger total L3 cache (12 MB vs 2 MB).
✅Draws 65W instead of 512W, a 447W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Pentium 3825U.

Trade-offs

❌Launch MSRP is still $160 MSRP, while Pentium 3825U mostly shows up through inconsistent older-market listings.

Pentium 3825U

2015

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-10400F across 4 shared CPU benchmark tests.
❌Lower PassMark (1,396 vs 13,029).
❌Smaller total L3 cache (2 MB vs 12 MB).
❌687.7% higher power demand at 512W vs 65W.
❌No boxed cooler included, unlike Core i5-10400F.

Core i5-10400F

2020

Pentium 3825U

2015

Why buy it

✅Better for gaming: +617.9% higher average FPS across 4 shared CPU benchmark tests.
✅+500% larger total L3 cache (12 MB vs 2 MB).
✅Draws 65W instead of 512W, a 447W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Pentium 3825U.

Why buy it

Trade-offs

❌Launch MSRP is still $160 MSRP, while Pentium 3825U mostly shows up through inconsistent older-market listings.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-10400F across 4 shared CPU benchmark tests.
❌Lower PassMark (1,396 vs 13,029).
❌Smaller total L3 cache (2 MB vs 12 MB).
❌687.7% higher power demand at 512W vs 65W.
❌No boxed cooler included, unlike Core i5-10400F.

Quick Answers

So, is Core i5-10400F better than Pentium 3825U?

Yes. Core i5-10400F is the better overall CPU here. You are getting a 617.9% average FPS lead across 4 shared CPU game tests in our data, 833.3% better PassMark, and the stronger long-term platform, which makes it the stronger all-around choice.

Which one is better for gaming?

If gaming is the priority, Core i5-10400F is the better pick here. According to our tests, it delivers 617.9% more average FPS across 4 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Core i5-10400F is the better fit. You are getting 833.3% better PassMark, backed by 6 cores and 12 threads. It also carries the larger cache pool with 500% larger total L3 cache (12 MB vs 2 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 $160 MSRP versus unclear MSRP, and it gives you a 617.9% average FPS lead across 4 shared CPU game tests in our data. It is also 100.0% better value on MSRP (81.4 vs 0.0 PassMark/$), 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 2015), 500% larger total L3 cache (12 MB vs 2 MB), and more multi-core headroom with 6 cores / 12 threads instead of 2/4. That extra compute headroom should age better as games, background tasks, and creator workloads get heavier.

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

Pentium 3825U Benchmark Check

Path of Exile 2

Preset	Core i5-10400F	Pentium 3825U
1080p
low	192 FPS	35 FPS
medium	152 FPS	35 FPS
high	123 FPS	35 FPS
ultra	100 FPS	35 FPS
1440p
low	153 FPS	35 FPS
medium	119 FPS	35 FPS
high	97 FPS	35 FPS
ultra	79 FPS	35 FPS
4K
low	82 FPS	35 FPS
medium	70 FPS	35 FPS
high	55 FPS	35 FPS
ultra	43 FPS	33 FPS

Open Core i5-10400F Open Pentium 3825U

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-10400F	Pentium 3825U
1080p
low	326 FPS	35 FPS
medium	318 FPS	35 FPS
high	290 FPS	35 FPS
ultra	253 FPS	35 FPS
1440p
low	326 FPS	35 FPS
medium	292 FPS	35 FPS
high	267 FPS	35 FPS
ultra	234 FPS	35 FPS
4K
low	309 FPS	35 FPS
medium	258 FPS	35 FPS
high	235 FPS	28 FPS
ultra	199 FPS	20 FPS

Open Core i5-10400F Open Pentium 3825U

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-10400F	Pentium 3825U
1080p
low	326 FPS	35 FPS
medium	326 FPS	35 FPS
high	326 FPS	35 FPS
ultra	326 FPS	35 FPS
1440p
low	326 FPS	35 FPS
medium	326 FPS	35 FPS
high	326 FPS	35 FPS
ultra	326 FPS	35 FPS
4K
low	326 FPS	35 FPS
medium	326 FPS	35 FPS
high	289 FPS	35 FPS
ultra	229 FPS	35 FPS

Open Core i5-10400F Open Pentium 3825U

League of Legends

League of Legends

Valorant

Preset	Core i5-10400F	Pentium 3825U
1080p
low	326 FPS	35 FPS
medium	326 FPS	35 FPS
high	326 FPS	35 FPS
ultra	326 FPS	35 FPS
1440p
low	326 FPS	35 FPS
medium	326 FPS	35 FPS
high	326 FPS	35 FPS
ultra	326 FPS	35 FPS
4K
low	326 FPS	35 FPS
medium	326 FPS	35 FPS
high	326 FPS	35 FPS
ultra	326 FPS	35 FPS

Open Core i5-10400F Open Pentium 3825U

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-10400F and Pentium 3825U

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.

Pentium 3825U

The Pentium 3825U is manufactured by Intel. It was released in 1 March 2015 (10 years ago). It is based on the Broadwell-U (2015) architecture. It features 2 cores and 4 threads. Base frequency is 1.9 GHz, with boost up to 1.9 GHz. L3 cache: 2 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: FCBGA1168. Thermal design power (TDP): 15 Watt. Memory support: DDR3. Passmark benchmark score: 1,396 points. Launch price was $161.

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Processing Power

The Core i5-10400F packs 6 cores / 12 threads, while the Pentium 3825U offers 2 cores / 4 threads — the Core i5-10400F has 4 more cores. Boost clocks reach 4.3 GHz on the Core i5-10400F versus 1.9 GHz on the Pentium 3825U — a 77.4% clock advantage for the Core i5-10400F (base: 2.9 GHz vs 1.9 GHz). The Core i5-10400F uses the Comet Lake (2020−2025) architecture (14 nm), while the Pentium 3825U uses Broadwell-U (2015) (14 nm). In PassMark, the Core i5-10400F scores 13,029 against the Pentium 3825U's 1,396 — a 161.3% lead for the Core i5-10400F. L3 cache: 12 MB (total) on the Core i5-10400F vs 2 MB (total) on the Pentium 3825U.

Feature	Core i5-10400F	Pentium 3825U
Cores / Threads	6 / 12+200%	2 / 4
Boost Clock	4.3 GHz+126%	1.9 GHz
Base Clock	2.9 GHz+53%	1.9 GHz
L3 Cache	12 MB (total)+500%	2 MB (total)
L2 Cache	256K (per core)	256K (per core)
Process	14 nm	14 nm
Architecture	Comet Lake (2020−2025)	Broadwell-U (2015)
PassMark	13,029+833%	1,396
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 Pentium 3825U uses FCBGA1168 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i5-10400F	Pentium 3825U
Socket	LGA1200	FCBGA1168
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 (Pentium 3825U). Primary use case: Core i5-10400F targets Gaming. Direct competitor: Core i5-10400F rivals Ryzen 5 3600.