Atom x5-Z8550 vs Phenom II X2 550

Atom x5-Z8550 vs Phenom II X2 550 Performance Spectrum

Atom x5-Z8550

4 / 4

1,143

+0.1%

1,142

0.0%

Mobile Athlon 64 3700+

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.

Atom x5-Z8550 vs Phenom II X2 550 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.

Atom x5-Z8550 vs Phenom II X2 550: Pros, Cons & Final Verdict

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

Atom x5-Z8550

2016

Why buy it

✅+0.1% higher PassMark.
✅Integrated graphics onboard with Intel HD Graphics (Cherry Trail), while Phenom II X2 550 needs a discrete GPU.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Phenom II X2 550

2009

Why buy it

Trade-offs

❌Lower PassMark (1,142 vs 1,143).
❌No integrated graphics, while Atom x5-Z8550 can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Atom x5-Z8550 better than Phenom II X2 550?

It depends on what you want from the system. For gaming, Phenom II X2 550 is ahead with a 1.7% average FPS lead across 49 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Atom x5-Z8550 pulls ahead with 0.1% better PassMark.

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

For streaming, content creation, and heavier multitasking, Atom x5-Z8550 is the stronger fit. You are getting 0.1% better PassMark, backed by 4 cores and 4 threads.

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

Atom x5-Z8550 still makes the most sense overall. Atom x5-Z8550 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 0.1% better PassMark.

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

Atom x5-Z8550 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2016 vs 2009) and more multi-core headroom with 4 cores / 4 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Atom x5-Z8550 vs Phenom II X2 550 Technical Specifications

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

Atom x5-Z8550

The Atom x5-Z8550 is manufactured by Intel. It was released in 8 February 2016 (9 years ago). It is based on the Cherry Trail (2015−2016) architecture. It features 4 cores and 4 threads. Base frequency is 1.44 GHz, with boost up to 2.4 GHz. L3 cache: 0 kB. L2 cache: 2 MB. Built on 14 nm process technology. Socket: UTFCBGA1380. Memory support: DDR3. Passmark benchmark score: 1,143 points. Launch price was $69.

Phenom II X2 550

The Phenom II X2 550 is manufactured by AMD. It was released in 4 November 2009 (16 years ago). It is based on the Callisto (2009−2010) architecture. It features 2 cores and 2 threads. Base frequency is 3.1 GHz, with boost up to 3.1 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 80 Watt. Memory support: DDR3. Passmark benchmark score: 1,142 points. Launch price was $133.

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Processing Power

The Atom x5-Z8550 packs 4 cores / 4 threads, while the Phenom II X2 550 offers 2 cores / 2 threads — the Atom x5-Z8550 has 2 more cores. Boost clocks reach 2.4 GHz on the Atom x5-Z8550 versus 3.1 GHz on the Phenom II X2 550 — a 25.5% clock advantage for the Phenom II X2 550 (base: 1.44 GHz vs 3.1 GHz). The Atom x5-Z8550 uses the Cherry Trail (2015−2016) architecture (14 nm), while the Phenom II X2 550 uses Callisto (2009−2010) (45 nm). In PassMark, the Atom x5-Z8550 scores 1,143 against the Phenom II X2 550's 1,142 — a 0.1% lead for the Atom x5-Z8550. L3 cache: 0 kB on the Atom x5-Z8550 vs 6 MB (total) on the Phenom II X2 550.

Feature	Atom x5-Z8550	Phenom II X2 550
Cores / Threads	4 / 4+100%	2 / 2
Boost Clock	2.4 GHz	3.1 GHz+29%
Base Clock	1.44 GHz	3.1 GHz+115%
L3 Cache	0 kB	6 MB (total)
L2 Cache	2 MB+300%	512 kB (per core)
Process	14 nm-69%	45 nm
Architecture	Cherry Trail (2015−2016)	Callisto (2009−2010)
PassMark	1,143	1,142

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Memory & Platform

The Atom x5-Z8550 uses the UTFCBGA1380 socket (PCIe 3.0), while the Phenom II X2 550 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Atom x5-Z8550	Phenom II X2 550
Socket	UTFCBGA1380	AM3
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	LPDDR3-1600	—
Max RAM Capacity	8 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	2	—