Pentium III 800 vs Phenom X3 8400

VS

Primary details

Comparing Phenom X3 8400 and Pentium III 800 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking2686not rated
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorDesktop processor
Power efficiency0.73no data
Architecture codenameToliman (2008)Coppermine T (2000)
Release dateMarch 2008 (16 years ago)no data

Detailed specifications

Phenom X3 8400 and Pentium III 800 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores3 (Tri-Core)1 (Single-Core)
Threads31
Boost clock speed2.1 GHz0.8 GHz
L1 cache128 KB (per core)8 KB
L2 cache512 KB (per core)256 KB
L3 cache2 MB (shared)0 KB
Chip lithography65 nm180 nm
Die size285 mm280 mm2
Maximum case temperature (TCase)no data69 °C
Number of transistors450 million44 million
64 bit support+-
Windows 11 compatibility--

Compatibility

Information on Phenom X3 8400 and Pentium III 800 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration11
SocketAM2+370
Power consumption (TDP)95 Watt38 Watt

Virtualization technologies

Virtual machine speed-up technologies supported by Phenom X3 8400 and Pentium III 800 are enumerated here.

AMD-V+-

Pros & cons summary


Physical cores 3 1
Threads 3 1
Chip lithography 65 nm 180 nm
Power consumption (TDP) 95 Watt 38 Watt

Phenom X3 8400 has 200% more physical cores and 200% more threads, and a 176.9% more advanced lithography process.

Pentium III 800, on the other hand, has 150% lower power consumption.

We couldn't decide between Phenom X3 8400 and Pentium III 800. We've got no test results to judge.


Should you still have questions on choice between Phenom X3 8400 and Pentium III 800, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


AMD Phenom X3 8400
Phenom X3 8400
Intel Pentium III  800
Pentium III 800

Similar processor comparisons

We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.

Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


3 36 votes

Rate Phenom X3 8400 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
3.6 63 votes

Rate Pentium III 800 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about Phenom X3 8400 or Pentium III 800, agree or disagree with our judgements, or report an error or mismatch.