Pentium 3825U vs Pentium D 820

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.

Pentium 3825U vs Pentium D 820 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.

Pentium 3825U vs Pentium D 820: Pros, Cons & Final Verdict

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

Pentium 3825U

2015

Why buy it

Trade-offs

❌Lower PassMark (1,396 vs 1,412).
❌25500% higher power demand at 512W vs 2W.

Pentium D 820

2005

Why buy it

✅Draws 2W instead of 512W, a 510W reduction.

Trade-offs

❌Launch MSRP is still $241 MSRP, while Pentium 3825U mostly shows up through inconsistent older-market listings.

Quick Answers

So, is Pentium D 820 better than Pentium 3825U?

Yes. Pentium D 820 is the better all-around CPU here. It gives you a 1.9% average FPS lead across 50 shared CPU game tests in our data and 1.1% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Pentium D 820 is the better pick. According to our tests, it delivers 1.9% 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, Pentium D 820 is the stronger fit. You are getting 1.1% better PassMark, backed by 2 cores and 2 threads.

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

Pentium D 820 is the better buy right now. Pentium D 820 comes in at an unclear MSRP at $241 MSRP versus unclear MSRP, and it still gives you a 1.9% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (5.9 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Pentium 3825U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2005). That makes it the safer long-term bet.

Pentium 3825U vs Pentium D 820 Technical Specifications

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

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.

Pentium D 820

The Pentium D 820 is manufactured by Intel. It was released in 2007-01-01. It is based on the NetBurst (2000−2006) architecture. It features 2 cores and 2 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 0 kB. L2 cache: 2 MB. Built on 90 nm process technology. Socket: LGA775. Thermal design power (TDP): 95 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 1,412 points. Launch price was $69.

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Processing Power

The Pentium 3825U packs 2 cores / 4 threads, matching the Pentium D 820's 2 cores. Boost clocks reach 1.9 GHz on the Pentium 3825U versus 2.8 GHz on the Pentium D 820 — a 38.3% clock advantage for the Pentium D 820 (base: 1.9 GHz vs 2.8 GHz). The Pentium 3825U uses the Broadwell-U (2015) architecture (14 nm), while the Pentium D 820 uses NetBurst (2000−2006) (90 nm). In PassMark, the Pentium 3825U scores 1,396 against the Pentium D 820's 1,412 — a 1.1% lead for the Pentium D 820. L3 cache: 2 MB (total) on the Pentium 3825U vs 0 kB on the Pentium D 820.

Feature	Pentium 3825U	Pentium D 820
Cores / Threads	2 / 4	2 / 2
Boost Clock	1.9 GHz	2.8 GHz+47%
Base Clock	1.9 GHz	2.8 GHz+47%
L3 Cache	2 MB (total)	0 kB
L2 Cache	256K (per core)+12700%	2 MB
Process	14 nm-84%	90 nm
Architecture	Broadwell-U (2015)	NetBurst (2000−2006)
PassMark	1,396	1,412+1%
Geekbench 6 Single	—	166

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Memory & Platform

The Pentium 3825U uses the FCBGA1168 socket (PCIe 3.0), while the Pentium D 820 uses LGA775 (PCIe 1.1) — making them incompatible on the same motherboard.

Feature	Pentium 3825U	Pentium D 820
Socket	FCBGA1168	LGA775
PCIe Generation	PCIe 3.0+173%	PCIe 1.1
Max RAM Speed	—	DDR2-667
Max RAM Capacity	—	4 GB
RAM Channels	—	2
ECC Support	—	No
PCIe Lanes	—	0