Athlon II X3 445 vs Xeon E5503

Athlon II X3 445 vs Xeon E5503 Performance Spectrum

Athlon II X3 445

3 / 3

1,807

0.0%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Xeon E5503

2 / 2

1,815

+0.4%

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 445 vs Xeon E5503 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 445 vs Xeon E5503: 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 445

2010

Why buy it

✅Better for gaming: +3.7% higher average FPS across 50 shared CPU benchmark tests.

Trade-offs

❌Lower PassMark (1,807 vs 1,815).
❌Launch MSRP is still $87 MSRP, while Xeon E5503 mostly shows up through inconsistent older-market listings.
❌18.8% higher power demand at 95W vs 80W.

Xeon E5503

2010

Why buy it

✅+0.4% higher PassMark.
✅Draws 80W instead of 95W, a 15W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Athlon II X3 445 across 50 shared CPU benchmark tests.

Quick Answers

So, is Xeon E5503 better than Athlon II X3 445?

Not really, because they are built for different jobs. Xeon E5503 makes more sense for workstation-style multi-core throughput, while Athlon II X3 445 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 E5503 is the stronger fit. You are getting 0.4% better PassMark, backed by 2 cores and 2 threads.

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

Xeon E5503 is still the much better call for a fresh build. Xeon E5503 comes in at an unclear MSRP at unclear MSRP versus $87 MSRP, and it still gives you 0.4% better PassMark. Athlon II X3 445 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2010 platform. Even with 100.0% better value on paper (20.8 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on AM3.

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

Xeon E5503 is the safer long-term CPU choice because it gives you more room to grow and a better platform outlook.

Athlon II X3 445 vs Xeon E5503 Technical Specifications

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

Athlon II X3 445

The Athlon II X3 445 is manufactured by AMD. It was released in 11 May 2010 (15 years ago). It is based on the Rana (2009−2011) architecture. It features 3 cores and 3 threads. Base frequency is 3.1 GHz, with boost up to 3.1 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: 1,807 points. Launch price was $91.

Xeon E5503

The Xeon E5503 is manufactured by Intel. It was released in 16 March 2010 (15 years ago). It is based on the Gainestown (2009−2010) architecture. It features 2 cores and 2 threads. Base frequency is 2 GHz, with boost up to 2 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 45 nm process technology. Socket: LGA1366. Thermal design power (TDP): 80 Watt. Memory support: DDR3. Passmark benchmark score: 1,815 points. Launch price was $287.

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Processing Power

The Athlon II X3 445 packs 3 cores / 3 threads, while the Xeon E5503 offers 2 cores / 2 threads — the Athlon II X3 445 has 1 more core. Boost clocks reach 3.1 GHz on the Athlon II X3 445 versus 2 GHz on the Xeon E5503 — a 43.1% clock advantage for the Athlon II X3 445 (base: 3.1 GHz vs 2 GHz). The Athlon II X3 445 uses the Rana (2009−2011) architecture (45 nm), while the Xeon E5503 uses Gainestown (2009−2010) (45 nm). In PassMark, the Athlon II X3 445 scores 1,807 against the Xeon E5503's 1,815 — a 0.4% lead for the Xeon E5503. L3 cache: 0 kB on the Athlon II X3 445 vs 4 MB (total) on the Xeon E5503.

Feature	Athlon II X3 445	Xeon E5503
Cores / Threads	3 / 3+50%	2 / 2
Boost Clock	3.1 GHz+55%	2 GHz
Base Clock	3.1 GHz+55%	2 GHz
L3 Cache	0 kB	4 MB (total)
L2 Cache	512 kB (per core)+100%	256 kB (per core)
Process	45 nm	45 nm
Architecture	Rana (2009−2011)	Gainestown (2009−2010)
PassMark	1,807	1,815

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Memory & Platform

The Athlon II X3 445 uses the AM3 socket (PCIe 2.0), while the Xeon E5503 uses LGA1366 (PCIe 2.0) — making them incompatible on the same motherboard.