Opteron 140 vs Xeon 2.66

Opteron 140 vs Xeon 2.66 Performance Spectrum

Opteron 140

1 / 1

428

0.0%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Xeon 2.66

1 / 1

445

+4.0%

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.

Opteron 140 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.

Opteron 140 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.

Opteron 140

2003

Why buy it

✅Draws 85W instead of 89W, a 4W reduction.

Trade-offs

❌Lower PassMark (428 vs 445).

Xeon 2.66

2002

Why buy it

Trade-offs

❌Launch MSRP is still $337 MSRP, while Opteron 140 mostly shows up through inconsistent older-market listings.

Quick Answers

So, is Xeon 2.66 better than Opteron 140?

Yes. Xeon 2.66 is the better all-around CPU here. It gives you 4% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Xeon 2.66 has the edge because it leads the single-thread side of this matchup with 90% higher max boost clock.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Xeon 2.66 is the stronger fit. You are getting 4% better PassMark, backed by 1 cores and 1 threads.

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

Xeon 2.66 is the better buy right now. Xeon 2.66 comes in at an unclear MSRP at $337 MSRP versus unclear MSRP, and it still gives you 4.0% higher PassMark. It is also 100.0% better value on MSRP (1.3 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Opteron 140 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2003 vs 2002). That makes it the safer long-term bet.

Opteron 140 vs Xeon 2.66 Technical Specifications

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

Opteron 140

The Opteron 140 is manufactured by AMD. It was released in Setembro 2003 (22 years ago). It is based on the SledgeHammer (2003−2005) architecture. It features 1 cores and 1 threads. Max frequency: 1.4 GHz. L3 cache: 0 kB. L2 cache: 1 MB. Built on 130 nm process technology. Socket: 940. Thermal design power (TDP): 85 Watt. Passmark benchmark score: 428 points. Launch price was $596.

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.

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Processing Power

Both the Opteron 140 and Xeon 2.66 share an identical 1-core/1-thread configuration. Boost clocks reach 1.4 GHz on the Opteron 140 versus 2.66 GHz on the Xeon 2.66 — a 62.1% clock advantage for the Xeon 2.66. The Opteron 140 uses the SledgeHammer (2003−2005) architecture (130 nm), while the Xeon 2.66 uses Prestonia (2002) (130 nm). In PassMark, the Opteron 140 scores 428 against the Xeon 2.66's 445 — a 3.9% lead for the Xeon 2.66. Both processors carry 0 kB of L3 cache.

Feature	Opteron 140	Xeon 2.66
Cores / Threads	1 / 1	1 / 1
Boost Clock	1.4 GHz	2.66 GHz+90%
L3 Cache	0 kB	0 kB
L2 Cache	1 MB+100%	512 kB
Process	130 nm	130 nm
Architecture	SledgeHammer (2003−2005)	Prestonia (2002)
PassMark	428	445+4%

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Memory & Platform

The Opteron 140 uses the 940 socket (PCIe 2.0), while the Xeon 2.66 uses PGA604 (PCIe 2.0) — making them incompatible on the same motherboard.