Celeron M 900 vs Phenom II X4 820

Celeron M 900 vs Phenom II X4 820 Performance Spectrum

Celeron M 900

1 / 1

2,101

0.0%

2,114

+0.6%

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 M 900 vs Phenom II X4 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.

Celeron M 900 vs Phenom II X4 820: Pros, Cons & Final Verdict

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

Celeron M 900

2009

Why buy it

✅Costs $64 less on MSRP ($86 MSRP vs $150 MSRP).
✅Delivers 73.3% more PassMark for each dollar spent, at 24.4 vs 14.1 PassMark/$ ($86 MSRP vs $150 MSRP).
✅Draws 1W instead of 95W, a 94W reduction.

Trade-offs

❌Lower PassMark (2,101 vs 2,114).

Phenom II X4 820

2009

Why buy it

Trade-offs

❌Lower PassMark per dollar, at 14.1 vs 24.4 PassMark/$ ($150 MSRP vs $86 MSRP).
❌9400% higher power demand at 95W vs 1W.

Quick Answers

So, is Phenom II X4 820 better than Celeron M 900?

Yes. Phenom II X4 820 is the better all-around CPU here. It gives you a 2.5% average FPS lead across 50 shared CPU game tests in our data, 0.6% 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, Phenom II X4 820 is the better pick. According to our tests, it delivers 2.5% 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 II X4 820 is the stronger fit. You are getting 0.6% better PassMark, backed by 4 cores and 4 threads.

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

Phenom II X4 820 is still the much better call for a fresh build. Phenom II X4 820 comes in 74.4% more expensive on MSRP at $150 MSRP versus $86 MSRP, and it still gives you a 2.5% average FPS lead across 50 shared CPU game tests in our data. Celeron M 900 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2009 platform. Even with 73.3% better value on paper (24.4 vs 14.1 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on PGA478.

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

Phenom II X4 820 makes more sense long term for 2026 and beyond. You are getting more multi-core headroom with 4 cores / 4 threads instead of 1/1. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Celeron M 900 vs Phenom II X4 820 Technical Specifications

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

Celeron M 900

The Celeron M 900 is manufactured by Intel. It was released in 1 April 2009 (16 years ago). It is based on the Penryn (2008−2011) architecture. It features 1 cores and 1 threads. Max frequency: 2.2 GHz. L2 cache: 1 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 1 MB. Passmark benchmark score: 2,101 points. Launch price was $70.

Phenom II X4 820

The Phenom II X4 820 is manufactured by AMD. It was released in 1 September 2009 (16 years ago). It is based on the Deneb (2009−2011) architecture. It features 4 cores and 4 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 4 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 2,114 points. Launch price was $90.

⚡

Processing Power

The Celeron M 900 packs 1 cores / 1 threads, while the Phenom II X4 820 offers 4 cores / 4 threads — the Phenom II X4 820 has 3 more cores. Boost clocks reach 2.2 GHz on the Celeron M 900 versus 2.8 GHz on the Phenom II X4 820 — a 24% clock advantage for the Phenom II X4 820. The Celeron M 900 uses the Penryn (2008−2011) architecture (45 nm), while the Phenom II X4 820 uses Deneb (2009−2011) (45 nm). In PassMark, the Celeron M 900 scores 2,101 against the Phenom II X4 820's 2,114 — a 0.6% lead for the Phenom II X4 820.

Feature	Celeron M 900	Phenom II X4 820
Cores / Threads	1 / 1	4 / 4+300%
Boost Clock	2.2 GHz	2.8 GHz+27%
Base Clock	—	2.8 GHz
L3 Cache	—	4 MB (total)
L2 Cache	1 MB+100%	512 kB (per core)
Process	45 nm	45 nm
Architecture	Penryn (2008−2011)	Deneb (2009−2011)
PassMark	2,101	2,114

🧠

Memory & Platform

The Celeron M 900 uses the PGA478 socket (PCIe 1.1), while the Phenom II X4 820 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Celeron M 900	Phenom II X4 820
Socket	PGA478	AM3
PCIe Generation	PCIe 1.1	PCIe 2.0+82%

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Value Analysis

At launch, the Celeron M 900 was priced at $86, while the Phenom II X4 820 came in at $150. On launch pricing ($86 vs $150), Celeron M 900 was $64 cheaper. In terms of value on MSRP (PassMark points per dollar), the Celeron M 900 delivers 24.4 pts/$ vs 14.1 pts/$ for the Phenom II X4 820 — making the Celeron M 900 the 53.7% better value option.

Feature	Celeron M 900	Phenom II X4 820
MSRP	$86-43%	$150
Performance per Dollar	24.4+73%	14.1
Release Date	2009	2009

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