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CPU Benchmarks

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Intel Pentium III 1266S @ 1266MHz

Benchmarks for the Intel Pentium III 1266S can be found below. Release dates, price and performance comparisons are also listed when available. This is made using thousands of PerformanceTest benchmark results and is updated daily.

The first graph shows the relative performance of the CPU compared to the 10 other common (single) CPUs in terms of PassMark CPU Mark.
The 2nd graph shows the value for money, in terms of the CPUMark per dollar.
The pricing history data shows the price for a single Processor. For multiple Processors, multiply the price shown by the number of CPUs.

Is the Intel Pentium III 1266S @ 1266MHz Good for Gaming?

This is a fairly old CPU that is no longer competitive with newer CPUs. [More ...]

Intel Pentium III 1266S @ 1266MHz

Description:

Class: Desktop

Socket: Socket 370

Clockspeed: 1.3 GHz

Cores: 1 Threads: 1

Typical TDP: 30.4 W

Other names: Intel(R) Pentium(R) III CPU - S 1266MHz, Intel(R) Pentium(R) III CPU family 1266MHz

CPU First Seen on Charts: Q2 2009

CPUmark/$Price: NA

Overall Rank:
5603rd fastest in multithreading out of 5819 CPUs
Insufficient data samples to calculate single thread ranking.
1509th fastest in out of 1557 Desktop CPUs

Last Price Change: NA

Average CPU Mark rating

Multithread Rating

201

Samples: 1*
*Margin for error: High

CPU Mark Distribution for Intel Pentium III 1266S @ 1266MHz

Submitted Baseline Distribution Graph as of 13th of March 2026

Not Enough Data from Current Version of PerformanceTest to Create Distribution Graph.

From submitted results since PerformanceTest V10 as of 13th of March 2026.

Search for Intel Pentium III 1266S @ 1266MHz
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CPU Mark Relative to Top 10 Common Desktop CPUs
As of 14th of March 2026 - Higher results represent better performance
Processor	Average CPU Mark
Intel Core i9-14900K		58,416
Intel Core i9-13900K		58,255
AMD Ryzen 9 5900X		38,935
Apple M4 10 Core		23,685
AMD Ryzen 5 5600X		21,844
Intel Core i5-12400F		19,596
Intel Core i9-9900K @ 3.60GHz		18,075
AMD Ryzen 5 3600		17,677
Apple M2 8 Core 3500 MHz		15,644
Apple M1 8 Core 3200 MHz		14,130
Intel Pentium III 1266S @ 1266MHz		201

CPU Value (CPU Mark / $Price )
As of 14th of March 2026 - Higher results represent better value
Processor	CPU Mark / $Price
AMD Ryzen 5 3600		192.75
AMD Ryzen 9 5900X		159.01
AMD Ryzen 5 5600X		144.67
Intel Core i9-14900K		124.56
Intel Core i9-13900K		107.88
Intel Core i9-9900K @ 3.60GHz		60.54
Intel Core i5-12400F		42.90
Intel Pentium III 1266S @ 1266MHz		NA
Apple M1 8 Core 3200 MHz		NA
Apple M2 8 Core 3500 MHz		NA
Apple M4 10 Core		NA

Single Thread Rating
As of 14th of March 2026 - Higher results represent better performance
Processor	Average Thread Rating
Intel Core i9-14900K		4,693
Intel Core i9-13900K		4,599
Apple M4 10 Core		4,514
Apple M2 8 Core 3500 MHz		3,886
Apple M1 8 Core 3200 MHz		3,675
Intel Core i5-12400F		3,489
AMD Ryzen 9 5900X		3,467
AMD Ryzen 5 5600X		3,366
Intel Core i9-9900K @ 3.60GHz		2,913
AMD Ryzen 5 3600		2,560
Intel Pentium III 1266S @ 1266MHz		NA

Popular comparisons for Intel Pentium III 1266S @ 1266MHz
As of 14th of March 2026 - Higher results represent better performance
Processor	Average CPU Mark
Intel Pentium III 1266S @ 1266MHz		201
AMD Sempron 2800+ vs Intel Pentium III 1266S		243 (+20.7%)
AMD Sempron LE-1150 vs Intel Pentium III 1266S		251 (+25.0%)
AMD Sempron 3200+ vs Intel Pentium III 1266S		251 (+24.7%)
AMD Sempron 2500+ vs Intel Pentium III 1266S		207 (+2.8%)
AMD Sempron 2400+ vs Intel Pentium III 1266S		205 (+1.7%)
AMD Athlon XP 1800+ vs Intel Pentium III 1266S		195 (-2.9%)
AMD Athlon XP 2000+ vs Intel Pentium III 1266S		195 (-3.0%)
AMD Sempron 2200+ vs Intel Pentium III 1266S		184 (-8.7%)
AMD Athlon XP 1700+ vs Intel Pentium III 1266S		176 (-12.3%)
AMD Athlon 64 FX-34 vs Intel Pentium III 1266S		247 (+23.1%)
AMD Athlon 2500+ vs Intel Pentium III 1266S		243 (+21.0%)
AMD Athlon 2200+ vs Intel Pentium III 1266S		236 (+17.5%)