Celeron 3855U vs Phenom X3 8450

Celeron 3855U vs Phenom X3 8450 Performance Spectrum

Celeron 3855U

2 / 2

1,215

0.0%

1,221

+0.5%

Ryzen Threadripper PRO 3955WX

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 3855U vs Phenom X3 8450 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 3855U vs Phenom X3 8450: Pros, Cons & Final Verdict

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

Celeron 3855U

2015

Why buy it

✅Draws 15W instead of 95W, a 80W reduction.
✅100+% more PCIe lanes (10 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel HD Graphics 510, while Phenom X3 8450 needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Phenom X3 8450 across 50 shared CPU benchmark tests.
❌Lower PassMark (1,215 vs 1,221).

Phenom X3 8450

2008

Why buy it

✅Better for gaming: +3.0% higher average FPS across 50 shared CPU benchmark tests.

Trade-offs

❌Launch MSRP is still $145 MSRP, while Celeron 3855U mostly shows up through inconsistent older-market listings.
❌533.3% higher power demand at 95W vs 15W.
❌No integrated graphics, while Celeron 3855U can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Phenom X3 8450 better than Celeron 3855U?

Yes. Phenom X3 8450 is the better all-around CPU here. It gives you a 3.0% average FPS lead across 50 shared CPU game tests in our data and 0.5% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Phenom X3 8450 is the better pick. According to our tests, it delivers 3.0% 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, Phenom X3 8450 is the stronger fit. You are getting 0.5% better PassMark, backed by 3 cores and 3 threads.

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

Phenom X3 8450 is the better buy right now. Phenom X3 8450 comes in at an unclear MSRP at $145 MSRP versus unclear MSRP, and it still gives you a 3.0% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (8.4 vs 0.0 PassMark/$), 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 3855U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2008). That makes it the safer long-term bet.

Celeron 3855U vs Phenom X3 8450 Technical Specifications

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

Celeron 3855U

The Celeron 3855U is manufactured by Intel. It was released in 15 August 2015 (10 years ago). It is based on the Skylake (2015−2016) architecture. It features 2 cores and 2 threads. Base frequency is 1.6 GHz, with boost up to 1.6 GHz. L3 cache: 2 MB. L2 cache: 512 kB. Built on 14 nm process technology. Socket: BGA1356. Thermal design power (TDP): 15 Watt. Memory support: DDR4-1866/2133, LPDDR3-1600/1866, DDR3L-1333/1600. Passmark benchmark score: 1,215 points. Launch price was $107.

Phenom X3 8450

The Phenom X3 8450 is manufactured by AMD. It was released in 2009-01-01. It is based on the Toliman (2008) architecture. It features 3 cores and 3 threads. Max frequency: 2.1 GHz. L3 cache: 2 MB (total). L2 cache: 512 kB (per core). Built on 65 nm process technology. Socket: AM2+. Thermal design power (TDP): 95 Watt. Passmark benchmark score: 1,221 points. Launch price was $149.

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Processing Power

The Celeron 3855U packs 2 cores / 2 threads, while the Phenom X3 8450 offers 3 cores / 3 threads — the Phenom X3 8450 has 1 more core. Boost clocks reach 1.6 GHz on the Celeron 3855U versus 2.1 GHz on the Phenom X3 8450 — a 27% clock advantage for the Phenom X3 8450. The Celeron 3855U uses the Skylake (2015−2016) architecture (14 nm), while the Phenom X3 8450 uses Toliman (2008) (65 nm). In PassMark, the Celeron 3855U scores 1,215 against the Phenom X3 8450's 1,221 — a 0.5% lead for the Phenom X3 8450. L3 cache: 2 MB on the Celeron 3855U vs 2 MB (total) on the Phenom X3 8450.

Feature	Celeron 3855U	Phenom X3 8450
Cores / Threads	2 / 2	3 / 3+50%
Boost Clock	1.6 GHz	2.1 GHz+31%
Base Clock	1.6 GHz	—
L3 Cache	2 MB	2 MB (total)
L2 Cache	512 kB	512 kB (per core)
Process	14 nm-78%	65 nm
Architecture	Skylake (2015−2016)	Toliman (2008)
PassMark	1,215	1,221
Geekbench 6 Single	361	—
Geekbench 6 Multi	632	—

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Memory & Platform

The Celeron 3855U uses the BGA1356 socket (PCIe 3.0), while the Phenom X3 8450 uses AM2+ (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Celeron 3855U	Phenom X3 8450
Socket	BGA1356	AM2+
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	DDR4 2133 MHz	—
Max RAM Capacity	32 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	10	—

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Advanced Features

Virtualization: true (Celeron 3855U) / not specified (Phenom X3 8450). The Celeron 3855U includes integrated graphics (Intel HD Graphics 510), while the Phenom X3 8450 requires a dedicated GPU. Primary use case: Celeron 3855U targets Budget. Direct competitor: Celeron 3855U rivals Pentium 3825U.