Core i5-520UM vs Xeon X6550

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.

Core i5-520UM 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.

Core i5-520UM 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.

Core i5-520UM

2010

Why buy it

✅+0.4% higher PassMark.
✅Draws 18W instead of 130W, a 112W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel HD Graphics (Ironlake), while Xeon X6550 needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon X6550 across 16 shared CPU benchmark tests.
❌Smaller total L3 cache (3 MB vs 18 MB).
❌Less compelling for workstation-style loads than Xeon X6550, which brings 8 cores / 16 threads.

Xeon X6550

2010

Why buy it

✅Better for gaming: +3.6% higher average FPS across 16 shared CPU benchmark tests.
✅+500% larger total L3 cache (18 MB vs 3 MB).
✅Better for workstations and heavier parallel workloads: 8 cores / 16 threads.

Trade-offs

❌Lower PassMark (1,936 vs 1,943).
❌622.2% higher power demand at 130W vs 18W.
❌No integrated graphics, while Core i5-520UM can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i5-520UM 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 Core i5-520UM 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, Core i5-520UM is the stronger fit. You are getting 0.4% better PassMark, backed by 2 cores and 4 threads.

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

Core i5-520UM still makes the most sense overall. Core i5-520UM comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 0.4% better PassMark.

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.

Core i5-520UM vs Xeon X6550 Technical Specifications

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

Core i5-520UM

The Core i5-520UM is manufactured by Intel. It was released in 7 January 2010 (15 years ago). It is based on the Arrandale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 1.07 GHz, with boost up to 1.87 GHz. L3 cache: 3 MB. L2 cache: 512 kB. Built on 32 nm process technology. Socket: BGA1288. Thermal design power (TDP): 18 Watt. Memory support: DDR3-800. Passmark benchmark score: 1,943 points. Launch price was $241.

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 Core i5-520UM packs 2 cores / 4 threads, while the Xeon X6550 offers 8 cores / 16 threads — the Xeon X6550 has 6 more cores. Boost clocks reach 1.87 GHz on the Core i5-520UM versus 2.4 GHz on the Xeon X6550 — a 24.8% clock advantage for the Xeon X6550 (base: 1.07 GHz vs 2 GHz). The Core i5-520UM is built on the Arrandale (2010−2011) architecture. In PassMark, the Core i5-520UM scores 1,943 against the Xeon X6550's 1,936 — a 0.4% lead for the Core i5-520UM. L3 cache: 3 MB on the Core i5-520UM vs 18 MB L3 Cache on the Xeon X6550.

Feature	Core i5-520UM	Xeon X6550
Cores / Threads	2 / 4	8 / 16+300%
Boost Clock	1.87 GHz	2.4 GHz+28%
Base Clock	1.07 GHz	2 GHz+87%
L3 Cache	3 MB	18 MB L3 Cache+500%
L2 Cache	512 kB	—
Process	32 nm-29%	45 nm
Architecture	Arrandale (2010−2011)	—
PassMark	1,943	1,936

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Memory & Platform

The Core i5-520UM uses the BGA1288 socket (PCIe 2.0), while the Xeon X6550 uses LGA1567 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 800 on the Core i5-520UM versus DDR3-1333 on the Xeon X6550 — the Xeon X6550 supports 66.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. Memory channels: 2 (Core i5-520UM) vs 4 (Xeon X6550). Chipset compatibility: HM55,HM57,QM57,QS57 (Core i5-520UM) and Nehalem-EX (Xeon X6550).

Feature	Core i5-520UM	Xeon X6550
Socket	BGA1288	LGA1567
PCIe Generation	PCIe 2.0	PCIe 5.0+150%
Max RAM Speed	800	DDR3-1333+67%
Max RAM Capacity	8	—
RAM Channels	2	4+100%
ECC Support	No	Yes
PCIe Lanes	16	—

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Advanced Features

Neither processor supports overclocking. Virtualization support: true (Core i5-520UM) vs VT-x, VT-d, EPT (Xeon X6550). The Core i5-520UM includes integrated graphics (Intel HD Graphics (Ironlake)), while the Xeon X6550 requires a dedicated GPU. Primary use case: Xeon X6550 targets Server. Direct competitor: Core i5-520UM rivals Core 2 Duo SU9400; Xeon X6550 rivals Core i7-980X.