Athlon 64 3000+ vs Xeon 2.66

Athlon 64 3000+ vs Xeon 2.66 Performance Spectrum

Athlon 64 3000+

1 / 1

450

+1.1%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Xeon 2.66

1 / 1

445

0.0%

Atom 230

Pentium 4 2.26

Pentium M 1.40

Mobile Pentium 4 2.66

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 64 3000+ vs Xeon 2.66 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 64 3000+ vs Xeon 2.66: Pros, Cons & Final Verdict

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

Athlon 64 3000+

2001

Why buy it

✅+1.1% higher PassMark.
✅Costs $188 less on MSRP ($149 MSRP vs $337 MSRP).
✅Delivers 128.7% more PassMark for each dollar spent, at 3.0 vs 1.3 PassMark/$ ($149 MSRP vs $337 MSRP).

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Xeon 2.66

2002

Why buy it

Trade-offs

❌Lower PassMark (445 vs 450).
❌Lower PassMark per dollar, at 1.3 vs 3.0 PassMark/$ ($337 MSRP vs $149 MSRP).

Quick Answers

So, is Athlon 64 3000+ better than Xeon 2.66?

Not really, because they are built for different jobs. Xeon 2.66 makes more sense for workstation-style multi-core throughput, while Athlon 64 3000+ 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 64 3000+ is the stronger fit. You are getting 1.1% better PassMark, backed by 1 cores and 1 threads.

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

Athlon 64 3000+ is the better buy right now. Athlon 64 3000+ comes in $188 cheaper on MSRP at $149 MSRP versus $337 MSRP, and it still gives you 1.1% better PassMark. The compromise is that Xeon 2.66 is still the better pure gaming CPU with 33% higher max boost clock. It is also 128.7% better value on MSRP (3.0 vs 1.3 PassMark/$), 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 2.66 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2002 vs 2001). That makes it the safer long-term bet.

Athlon 64 3000+ vs Xeon 2.66 Technical Specifications

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

Athlon 64 3000+

The Athlon 64 3000+ is manufactured by AMD. It was released in Janeiro 2001 (24 years ago). It is based on the Clawhammer (2001−2005) architecture. It features 1 cores and 1 threads. Max frequency: 2 GHz. L3 cache: 0 kB. L2 cache: 512K. Built on 130 nm process technology. Socket: 754. Thermal design power (TDP): 89 Watt. Passmark benchmark score: 450 points. Launch price was $65.

Xeon 2.66

The Xeon 2.66 is manufactured by Intel. It was released in 2015-01-01. It is based on the Prestonia (2002) architecture. It features 1 cores and 1 threads. Max frequency: 2.66 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA604. Thermal design power (TDP): 89 Watt. Passmark benchmark score: 445 points. Launch price was $800.

⚡

Processing Power

Both the Athlon 64 3000+ and Xeon 2.66 share an identical 1-core/1-thread configuration. Boost clocks reach 2 GHz on the Athlon 64 3000+ versus 2.66 GHz on the Xeon 2.66 — a 28.3% clock advantage for the Xeon 2.66. The Athlon 64 3000+ uses the Clawhammer (2001−2005) architecture (130 nm), while the Xeon 2.66 uses Prestonia (2002) (130 nm). In PassMark, the Athlon 64 3000+ scores 450 against the Xeon 2.66's 445 — a 1.1% lead for the Athlon 64 3000+. Both processors carry 0 kB of L3 cache.

Feature	Athlon 64 3000+	Xeon 2.66
Cores / Threads	1 / 1	1 / 1
Boost Clock	2 GHz	2.66 GHz+33%
L3 Cache	0 kB	0 kB
L2 Cache	512K	512 kB
Process	130 nm	130 nm
Architecture	Clawhammer (2001−2005)	Prestonia (2002)
PassMark	450+1%	445

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Memory & Platform

The Athlon 64 3000+ uses the 754 socket (PCIe 1.1), while the Xeon 2.66 uses PGA604 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Athlon 64 3000+	Xeon 2.66
Socket	754	PGA604
PCIe Generation	PCIe 1.1	PCIe 2.0+82%
Max RAM Speed	DDR-400	—
Max RAM Capacity	4 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	0	—

💰

Value Analysis

At launch, the Athlon 64 3000+ was priced at $149, while the Xeon 2.66 came in at $337. On launch pricing ($149 vs $337), Athlon 64 3000+ was $188 cheaper. In terms of value on MSRP (PassMark points per dollar), the Athlon 64 3000+ delivers 3.0 pts/$ vs 1.3 pts/$ for the Xeon 2.66 — making the Athlon 64 3000+ the 78.3% better value option.

Feature	Athlon 64 3000+	Xeon 2.66
MSRP	$149-56%	$337
Performance per Dollar	3.0+131%	1.3
Release Date	2001	2002

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