Celeron 4305U vs Phenom II X3 P820

Celeron 4305U vs Phenom II X3 P820 Performance Spectrum

Celeron 4305U

2 / 2

1,562

+0.1%

1,560

0.0%

Ryzen Threadripper PRO 5945WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

About PassMark

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.

Celeron 4305U vs Phenom II X3 P820 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.

Celeron 4305U vs Phenom II X3 P820: Pros, Cons & Final Verdict

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

Celeron 4305U

2019

Why buy it

✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel UHD Graphics 610, while Phenom II X3 P820 needs a discrete GPU.

Trade-offs

❌Launch MSRP is still $107 MSRP, while Phenom II X3 P820 mostly shows up through inconsistent older-market listings.
❌900% higher power demand at 15W vs 1.5W.

Phenom II X3 P820

2010

Why buy it

✅Draws 2W instead of 15W, a 14W reduction.

Trade-offs

❌Lower PassMark (1,560 vs 1,562).
❌No integrated graphics, while Celeron 4305U can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Celeron 4305U better than Phenom II X3 P820?

Yes. Celeron 4305U is the better all-around CPU here. It gives you a 0.3% average FPS lead across 23 shared CPU game tests in our data, 0.1% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Celeron 4305U is the better pick. According to our tests, it delivers 0.3% more average FPS across 23 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Celeron 4305U is the stronger fit. You are getting 0.1% better PassMark, backed by 2 cores and 2 threads.

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

Celeron 4305U is the better buy right now. Celeron 4305U comes in at an unclear MSRP at $107 MSRP versus unclear MSRP, and it still gives you a 0.3% average FPS lead across 23 shared CPU game tests in our data. It is also 100.0% better value on MSRP (14.6 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Celeron 4305U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2019 vs 2010) and more multi-core headroom with 2 cores / 2 threads instead of 3/3. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Celeron 4305U vs Phenom II X3 P820 Technical Specifications

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

Celeron 4305U

The Celeron 4305U is manufactured by Intel. It was released in 16 April 2019 (6 years ago). It is based on the Whiskey Lake-U (2018−2019) architecture. It features 2 cores and 2 threads. Base frequency is 2.2 GHz, with boost up to 2.2 GHz. L3 cache: 2 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: FCBGA1528. Thermal design power (TDP): 15 Watt. Memory support: DDR4-2133, LPDDR3-1866. Passmark benchmark score: 1,562 points. Launch price was $107.

Phenom II X3 P820

The Phenom II X3 P820 is manufactured by AMD. It was released in 2009-01-01. It is based on the Champlain (2010−2011) architecture. It features 3 cores and 3 threads. Max frequency: 1.8 GHz. L2 cache: 1.5 MB. Built on 45 nm process technology. Socket: S1. Thermal design power (TDP): 1.5 MB. Memory support: DDR3. Passmark benchmark score: 1,560 points. Launch price was $149.

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Processing Power

The Celeron 4305U packs 2 cores / 2 threads, while the Phenom II X3 P820 offers 3 cores / 3 threads — the Phenom II X3 P820 has 1 more core. Boost clocks reach 2.2 GHz on the Celeron 4305U versus 1.8 GHz on the Phenom II X3 P820 — a 20% clock advantage for the Celeron 4305U. The Celeron 4305U uses the Whiskey Lake-U (2018−2019) architecture (14 nm), while the Phenom II X3 P820 uses Champlain (2010−2011) (45 nm). In PassMark, the Celeron 4305U scores 1,562 against the Phenom II X3 P820's 1,560 — a 0.1% lead for the Celeron 4305U.

Feature	Celeron 4305U	Phenom II X3 P820
Cores / Threads	2 / 2	3 / 3+50%
Boost Clock	2.2 GHz+22%	1.8 GHz
Base Clock	2.2 GHz	—
L3 Cache	2 MB (total)	—
L2 Cache	256 kB (per core)	1.5 MB+500%
Process	14 nm-69%	45 nm
Architecture	Whiskey Lake-U (2018−2019)	Champlain (2010−2011)
PassMark	1,562	1,560

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Memory & Platform

The Celeron 4305U uses the FCBGA1528 socket (PCIe 3.0), while the Phenom II X3 P820 uses S1 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Celeron 4305U	Phenom II X3 P820
Socket	FCBGA1528	S1
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	2133	—
Max RAM Capacity	64	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

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Advanced Features

Virtualization: true (Celeron 4305U) / not specified (Phenom II X3 P820). The Celeron 4305U includes integrated graphics (Intel UHD Graphics 610), while the Phenom II X3 P820 requires a dedicated GPU. Primary use case: Celeron 4305U targets Budget. Direct competitor: Celeron 4305U rivals Pentium Gold 5405U.