Core i5-661 vs Xeon X5450

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 i5-661 vs Xeon X5450 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 i5-661 vs Xeon X5450: Pros, Cons & Final Verdict

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

Core i5-661

2010

Why buy it

✅Draws 87W instead of 120W, a 33W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon X5450 across 50 shared CPU benchmark tests.
❌Lower PassMark (2,387 vs 2,416).
❌Smaller total L3 cache (4 MB vs 12 MB).
❌Less compelling for workstation-style loads than Xeon X5450, which brings 4 cores / 4 threads.
❌Launch MSRP is still $196 MSRP, while Xeon X5450 mostly shows up through inconsistent older-market listings.

Xeon X5450

2007

Why buy it

✅Better for gaming: +3.6% higher average FPS across 50 shared CPU benchmark tests.
✅+200% larger total L3 cache (12 MB vs 4 MB).
✅Better for workstations and heavier parallel workloads: 4 cores / 4 threads.

Trade-offs

❌37.9% higher power demand at 120W vs 87W.

Quick Answers

So, is Xeon X5450 better than Core i5-661?

Not really, because they are built for different jobs. Xeon X5450 makes more sense for workstation-style multi-core throughput, while Core i5-661 is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Xeon X5450 is the better pick. According to our tests, it delivers 3.6% 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, Xeon X5450 is the stronger fit. You are getting 1.2% better PassMark, backed by 4 cores and 4 threads. It also has the larger cache pool with 200% larger total L3 cache (12 MB vs 4 MB).

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

Xeon X5450 is still the much better call for a fresh build. Xeon X5450 comes in at an unclear MSRP at unclear MSRP versus $196 MSRP, and it still gives you a 3.6% average FPS lead across 50 shared CPU game tests in our data. Core i5-661 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2010 platform. Even with 100.0% better value on paper (12.2 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA1156.

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

Core i5-661 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2010 vs 2007). That makes it the safer long-term bet.

Core i5-661 vs Xeon X5450 Technical Specifications

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

Core i5-661

The Core i5-661 is manufactured by Intel. It was released in 7 January 2010 (15 years ago). It is based on the Clarkdale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 3.33 GHz, with boost up to 3.6 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1156. Thermal design power (TDP): 87 Watt. Memory support: DDR3. Passmark benchmark score: 2,387 points. Launch price was $252.

Xeon X5450

The Xeon X5450 is manufactured by Intel. It was released in 11 November 2007 (18 years ago). It is based on the Harpertown (2007−2008) architecture. It features 4 cores and 4 threads. Base frequency is 3 GHz, with boost up to 3 GHz. L3 cache: 12 MB L2 Cache. L2 cache: 6 MB (total). Built on 45 nm process technology. Socket: LGA771. Thermal design power (TDP): 120 Watt. Memory support: DDR2, DDR3 Depends on motherboard. Passmark benchmark score: 2,416 points. Launch price was $851.

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Processing Power

The Core i5-661 packs 2 cores / 4 threads, while the Xeon X5450 offers 4 cores / 4 threads — the Xeon X5450 has 2 more cores. Boost clocks reach 3.6 GHz on the Core i5-661 versus 3 GHz on the Xeon X5450 — a 18.2% clock advantage for the Core i5-661 (base: 3.33 GHz vs 3 GHz). The Core i5-661 uses the Clarkdale (2010−2011) architecture (32 nm), while the Xeon X5450 uses Harpertown (2007−2008) (45 nm). In PassMark, the Core i5-661 scores 2,387 against the Xeon X5450's 2,416 — a 1.2% lead for the Xeon X5450. L3 cache: 4 MB (total) on the Core i5-661 vs 12 MB L2 Cache on the Xeon X5450.

Feature	Core i5-661	Xeon X5450
Cores / Threads	2 / 4	4 / 4+100%
Boost Clock	3.6 GHz+20%	3 GHz
Base Clock	3.33 GHz+11%	3 GHz
L3 Cache	4 MB (total)	12 MB L2 Cache+200%
L2 Cache	256 kB (per core)	6 MB (total)+2300%
Process	32 nm-29%	45 nm
Architecture	Clarkdale (2010−2011)	Harpertown (2007−2008)
PassMark	2,387	2,416+1%

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Memory & Platform

The Core i5-661 uses the LGA1156 socket (PCIe 2.0), while the Xeon X5450 uses LGA771 (PCIe 2.0) — making them incompatible on the same motherboard.