Athlon II X3 455 vs Xeon X6550

Athlon II X3 455 vs Xeon X6550 Performance Spectrum

Athlon II X3 455

3 / 3

1,938

+0.1%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Xeon X6550

1,936

0.0%

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.

Athlon II X3 455 vs Xeon X6550 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.

Athlon II X3 455 vs Xeon X6550: Pros, Cons & Final Verdict

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

Athlon II X3 455

2010

Why buy it

✅+0.1% higher PassMark.
✅Draws 95W instead of 130W, a 35W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon X6550 across 50 shared CPU benchmark tests.
❌Less compelling for workstation-style loads than Xeon X6550, which brings 8 cores / 16 threads.
❌Launch MSRP is still $88 MSRP, while Xeon X6550 mostly shows up through inconsistent older-market listings.

Xeon X6550

2010

Why buy it

✅Better for gaming: +4.4% higher average FPS across 50 shared CPU benchmark tests.
✅Better for workstations and heavier parallel workloads: 8 cores / 16 threads.

Trade-offs

❌Lower PassMark (1,936 vs 1,938).
❌36.8% higher power demand at 130W vs 95W.

Quick Answers

So, is Athlon II X3 455 better than Xeon X6550?

Not really, because they are built for different jobs. Xeon X6550 makes more sense for workstation-style multi-core throughput, while Athlon II X3 455 is the more practical desktop choice for gaming, platform cost, and everyday use.

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

For streaming, content creation, and heavier multitasking, Athlon II X3 455 is the stronger fit. You are getting 0.1% better PassMark, backed by 3 cores and 3 threads.

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

Athlon II X3 455 is the better buy right now. Athlon II X3 455 comes in at an unclear MSRP at $88 MSRP versus unclear MSRP, and it still gives you 0.1% better PassMark. The compromise is that Xeon X6550 is still the better pure gaming CPU with a 4.4% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (22.0 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Xeon X6550 is the safer long-term CPU choice because it gives you more room to grow and a better platform outlook.

Athlon II X3 455 vs Xeon X6550 Technical Specifications

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

Athlon II X3 455

The Athlon II X3 455 is manufactured by AMD. It was released in 7 December 2010 (14 years ago). It is based on the Rana (2009−2011) architecture. It features 3 cores and 3 threads. Base frequency is 3.3 GHz, with boost up to 3.3 GHz. L3 cache: 0 kB. 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: 1,938 points. Launch price was $88.

Xeon X6550

The Xeon X6550 is manufactured by Intel. It was released in 2015-01-01. It features 8 cores and 16 threads. Base frequency is 2 GHz, with boost up to 2.4 GHz. L3 cache: 18 MB L3 Cache. Built on 45 nm process technology. Socket: LGA1567. Thermal design power (TDP): 130 Watt. Passmark benchmark score: 1,936 points. Launch price was $800.

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Processing Power

The Athlon II X3 455 packs 3 cores / 3 threads, while the Xeon X6550 offers 8 cores / 16 threads — the Xeon X6550 has 5 more cores. Boost clocks reach 3.3 GHz on the Athlon II X3 455 versus 2.4 GHz on the Xeon X6550 — a 31.6% clock advantage for the Athlon II X3 455 (base: 3.3 GHz vs 2 GHz). The Athlon II X3 455 is built on the Rana (2009−2011) architecture. In PassMark, the Athlon II X3 455 scores 1,938 against the Xeon X6550's 1,936 — a 0.1% lead for the Athlon II X3 455. L3 cache: 0 kB on the Athlon II X3 455 vs 18 MB L3 Cache on the Xeon X6550.

Feature	Athlon II X3 455	Xeon X6550
Cores / Threads	3 / 3	8 / 16+167%
Boost Clock	3.3 GHz+38%	2.4 GHz
Base Clock	3.3 GHz+65%	2 GHz
L3 Cache	0 kB	18 MB L3 Cache
L2 Cache	512 kB (per core)	—
Process	45 nm	45 nm
Architecture	Rana (2009−2011)	—
PassMark	1,938	1,936

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Memory & Platform

The Athlon II X3 455 uses the AM3 socket (PCIe 2.0), while the Xeon X6550 uses LGA1567 (PCIe 5.0) — making them incompatible on the same motherboard. Both support up to DDR3-1333 memory speed. Memory channels: 2 (Athlon II X3 455) vs 4 (Xeon X6550). Chipset compatibility: AMD AM3 (Athlon II X3 455) and Nehalem-EX (Xeon X6550).

Feature	Athlon II X3 455	Xeon X6550
Socket	AM3	LGA1567
PCIe Generation	PCIe 2.0	PCIe 5.0+150%
Max RAM Speed	DDR3-1333	DDR3-1333
Max RAM Capacity	32 GB	—
RAM Channels	2	4+100%
ECC Support	No	Yes
PCIe Lanes	0	—

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Advanced Features

Virtualization: not specified (Athlon II X3 455) / VT-x, VT-d, EPT (Xeon X6550). Primary use case: Xeon X6550 targets Server. Direct competitor: Xeon X6550 rivals Core i7-980X.