Celeron M 575 vs Xeon E5603

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 575 vs Xeon E5603 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 575 vs Xeon E5603: 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 575

2008

Why buy it

✅Costs $102 less on MSRP ($86 MSRP vs $188 MSRP).
✅Delivers 116.6% more PassMark for each dollar spent, at 22.3 vs 10.3 PassMark/$ ($86 MSRP vs $188 MSRP).
✅Draws 1W instead of 80W, a 79W reduction.

Trade-offs

❌Lower PassMark (1,917 vs 1,935).
❌Less compelling for workstation-style loads than Xeon E5603, which brings 4 cores / 4 threads and 32 PCIe lanes.

Xeon E5603

2011

Why buy it

✅+0.9% higher PassMark.
✅Better for workstations and heavier parallel workloads: 4 cores / 4 threads, plus 32 PCIe lanes vs 0.
✅100+% more PCIe lanes (32 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark per dollar, at 10.3 vs 22.3 PassMark/$ ($188 MSRP vs $86 MSRP).
❌7900% higher power demand at 80W vs 1W.

Quick Answers

So, is Celeron M 575 better than Xeon E5603?

Not really, because they are built for different jobs. Xeon E5603 makes more sense for workstation-style multi-core throughput, while Celeron M 575 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, Xeon E5603 is the stronger fit. You are getting 0.9% better PassMark, backed by 4 cores and 4 threads.

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

Celeron M 575 is the better buy right now. Celeron M 575 comes in $102 cheaper on MSRP at $86 MSRP versus $188 MSRP, and it still gives you a 2.6% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Xeon E5603 is still stronger for heavier multi-core work with 0.9% better PassMark. It is also 116.6% better value on MSRP (22.3 vs 10.3 PassMark/$), 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 E5603 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2011 vs 2008) and 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 575 vs Xeon E5603 Technical Specifications

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

Celeron M 575

The Celeron M 575 is manufactured by Intel. It was released in 1 June 2008 (17 years ago). It is based on the Merom (2006−2008) architecture. It features 1 cores and 1 threads. Max frequency: 2 GHz. L2 cache: 1 MB. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 1 MB. Passmark benchmark score: 1,917 points. Launch price was $86.

Xeon E5603

The Xeon E5603 is manufactured by Intel. It was released in 14 February 2011 (14 years ago). It is based on the Westmere-EP (2010−2011) architecture. It features 4 cores and 4 threads. Base frequency is 1.6 GHz, with boost up to 1.6 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 80 Watt. Memory support: DDR3. Passmark benchmark score: 1,935 points. Launch price was $286.

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Processing Power

The Celeron M 575 packs 1 cores / 1 threads, while the Xeon E5603 offers 4 cores / 4 threads — the Xeon E5603 has 3 more cores. Boost clocks reach 2 GHz on the Celeron M 575 versus 1.6 GHz on the Xeon E5603 — a 22.2% clock advantage for the Celeron M 575. The Celeron M 575 uses the Merom (2006−2008) architecture (65 nm), while the Xeon E5603 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Celeron M 575 scores 1,917 against the Xeon E5603's 1,935 — a 0.9% lead for the Xeon E5603.

Feature	Celeron M 575	Xeon E5603
Cores / Threads	1 / 1	4 / 4+300%
Boost Clock	2 GHz+25%	1.6 GHz
Base Clock	—	1.6 GHz
L3 Cache	—	4 MB (total)
L2 Cache	1 MB+300%	256 kB (per core)
Process	65 nm	32 nm-51%
Architecture	Merom (2006−2008)	Westmere-EP (2010−2011)
PassMark	1,917	1,935

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Memory & Platform

The Celeron M 575 uses the PGA478 socket (PCIe 1.1), while the Xeon E5603 uses LGA1366 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 800 on the Celeron M 575 versus DDR3-1066 on the Xeon E5603 — the Xeon E5603 supports 33.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon E5603 supports up to 288 GB of RAM compared to 4 GB — 7100% more capacity for professional workloads. Memory channels: 2 (Celeron M 575) vs 3 (Xeon E5603). PCIe lanes: 0 (Celeron M 575) vs 32 (Xeon E5603) — the Xeon E5603 offers 32 more lanes for additional GPUs or NVMe drives.

Feature	Celeron M 575	Xeon E5603
Socket	PGA478	LGA1366
PCIe Generation	PCIe 1.1	PCIe 2.0+82%
Max RAM Speed	800	DDR3-1066+33%
Max RAM Capacity	4 GB	288 GB+7100%
RAM Channels	2	3+50%
ECC Support	No	Yes
PCIe Lanes	0	32

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Advanced Features

Neither processor supports overclocking. Virtualization support: false (Celeron M 575) vs VT-x, VT-d (Xeon E5603). Primary use case: Xeon E5603 targets Server. Direct competitor: Celeron M 575 rivals Mobile Sempron SI-40.

Feature	Celeron M 575	Xeon E5603
Integrated GPU	No	No
IGPU Model	None	—
Unlocked	No	No
AVX-512	No	No
Virtualization	false	VT-x, VT-d
Target Use	—	Server

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Value Analysis

At launch, the Celeron M 575 was priced at $86, while the Xeon E5603 came in at $188. On launch pricing ($86 vs $188), Celeron M 575 was $102 cheaper. In terms of value on MSRP (PassMark points per dollar), the Celeron M 575 delivers 22.3 pts/$ vs 10.3 pts/$ for the Xeon E5603 — making the Celeron M 575 the 73.6% better value option.

Feature	Celeron M 575	Xeon E5603
MSRP	$86-54%	$188
Performance per Dollar	22.3+117%	10.3
Release Date	2008	2011

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