Athlon XP 1800+
Pentium III 1400S
Athlon XP 1800+ vs Pentium III 1400S Performance Spectrum
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 XP 1800+ vs Pentium III 1400S 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.
Path of Exile 2
Counter-Strike 2
League of Legends
Valorant
Among Us
Call of Duty: Warzone
Cyberpunk 2077
Deadlock
Destiny 2
Athlon XP 1800+ vs Pentium III 1400S: Pros, Cons & Final Verdict
See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.
Athlon XP 1800+
2001Why buy it
Trade-offs
- ❌Lower PassMark (225 vs 228).
- ❌0.8% HIGHER MSRP$252 MSRPvs$250 MSRP
- ❌106.3% higher power demand at 66W vs 32W.
Pentium III 1400S
2002Why buy it
- ✅+1.3% higher PassMark.
- ✅Costs $2 less on MSRP ($250 MSRP vs $252 MSRP).
- ✅Draws 32W instead of 66W, a 34W reduction.
Trade-offs
- ❌Fewer obvious downsides in this matchup outside of normal market pricing swings.
Quick Answers
So, is Pentium III 1400S better than Athlon XP 1800+?
Which one is better for streaming, content creation, and heavy multitasking?
Which one is the smarter buy today, not just the cheaper CPU?
Which one is more future-proof for 2026 and beyond?
Athlon XP 1800+ vs Pentium III 1400S Technical Specifications
Side-by-side specs, architecture details, clocks, memory, power, and platform differences.
Athlon XP 1800+
The Athlon XP 1800+ is manufactured by AMD. It was released in Janeiro 2001 (24 years ago). It is based on the Thoroughbred (2001−2002) architecture. It features 1 cores and 1 threads. Max frequency: 1.53 GHz. L3 cache: 0 kB. L2 cache: 256 kB. Built on 180 nm process technology. Socket: A. Thermal design power (TDP): 66 Watt. Passmark benchmark score: 225 points. Launch price was $59.
Pentium III 1400S
The Pentium III 1400S is manufactured by Intel. It was released in 2007-01-01. It is based on the Tualatin (2000−2002) architecture. It features 1 cores and 1 threads. Max frequency: 1.4 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA370. Thermal design power (TDP): 32 Watt. Passmark benchmark score: 228 points. Launch price was $69.
Processing Power
Both the Athlon XP 1800+ and Pentium III 1400S share an identical 1-core/1-thread configuration. Boost clocks reach 1.53 GHz on the Athlon XP 1800+ versus 1.4 GHz on the Pentium III 1400S — a 8.9% clock advantage for the Athlon XP 1800+. The Athlon XP 1800+ uses the Thoroughbred (2001−2002) architecture (180 nm), while the Pentium III 1400S uses Tualatin (2000−2002) (130 nm). In PassMark, the Athlon XP 1800+ scores 225 against the Pentium III 1400S's 228 — a 1.3% lead for the Pentium III 1400S. Both processors carry 0 kB of L3 cache.
| Feature | Athlon XP 1800+ | Pentium III 1400S |
|---|---|---|
| Cores / Threads | 1 / 1 | 1 / 1 |
| Boost Clock | 1.53 GHz+9% | 1.4 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 256 kB | 512 kB+100% |
| Process | 180 nm | 130 nm-28% |
| Architecture | Thoroughbred (2001−2002) | Tualatin (2000−2002) |
| PassMark | 225 | 228+1% |
| Geekbench 6 Single | 180 | — |
| Geekbench 6 Multi | 651 | — |
Memory & Platform
The Athlon XP 1800+ uses the A socket (PCIe 1.1), while the Pentium III 1400S uses PGA370 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR1 on the Athlon XP 1800+ versus PC133 on the Pentium III 1400S — the Pentium III 1400S supports 13200% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Pentium III 1400S supports up to 4 GB of RAM compared to 2 GB — 100% more capacity for professional workloads. Both feature 1-channel memory with ECC support. Chipset compatibility: KT133,KT266,nForce2 (Athlon XP 1800+) and Intel 815,VIA Apollo Pro 133T (Pentium III 1400S).
| Feature | Athlon XP 1800+ | Pentium III 1400S |
|---|---|---|
| Socket | A | PGA370 |
| PCIe Generation | PCIe 1.1 | PCIe 1.1 |
| Max RAM Speed | DDR1 | PC133+13200% |
| Max RAM Capacity | 2 GB | 4 GB+100% |
| RAM Channels | 1 | 1 |
| ECC Support | No | Yes |
| PCIe Lanes | — | 0 |
Advanced Features
Both support No virtualization. Primary use case: Athlon XP 1800+ targets Budget. Direct competitor: Athlon XP 1800+ rivals Pentium D 830.
| Feature | Athlon XP 1800+ | Pentium III 1400S |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | No | — |
| AVX-512 | No | No |
| Virtualization | No | No |
| Target Use | Budget | — |
Value Analysis
At launch, the Athlon XP 1800+ was priced at $252, while the Pentium III 1400S came in at $250. On launch pricing ($252 vs $250), Pentium III 1400S was $2 cheaper. In terms of value on MSRP (PassMark points per dollar), the Athlon XP 1800+ delivers 0.9 pts/$ vs 0.9 pts/$ for the Pentium III 1400S — making the Pentium III 1400S the 2.1% better value option.
| Feature | Athlon XP 1800+ | Pentium III 1400S |
|---|---|---|
| MSRP | $252 | $250 |
| Performance per Dollar | 0.9 | 0.9 |
| Release Date | 2001 | 2002 |
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