[ INTEL DESKTOP CPU // MODEL RECORD ]
Intel Pentium D 820
Smithfield Pentium D, Q2 2005; 2 cores / 2 threads; 2.80 GHz; 800 MT/s quad-pumped bus; LGA775 (Socket T); 2 MB total L2 (2 × 1 MB private); 16 KB L1 data per core; 95 W thermal design power. Verify the complete package marking and motherboard support before installation.
MODEL IDENTIFICATION: Intel Pentium D 820. This record refers to this desktop SKU, not an entire processor generation; verify the physical marking, S-spec/ordering code and motherboard support list.
Verified model specifications
| Catalog path | Intel → Pentium generations |
|---|---|
| Model / launch era | Intel Pentium D 820; Smithfield Pentium D, Q2 2005 |
| Cores / threads / frequency | 2 cores / 2 threads; 2.80 GHz; 800 MT/s quad-pumped bus |
| Package / socket | LGA775 (Socket T) |
| Cache | 2 MB total L2 (2 × 1 MB private); 16 KB L1 data per core |
| TDP | 95 W thermal design power |
| Memory / bus | DDR2-533/667, depending on the LGA775 chipset and board; the memory controller is in the chipset. |
| Platform compatibility | Use an LGA775 motherboard whose exact CPU-support list includes Pentium D 820 and whose power delivery, BIOS and cooling are suitable for this dual-core 95 W processor. LGA775 boards are not universally compatible; some require a newer board revision or BIOS. |
Compatibility and service notes
- Use an LGA775 motherboard whose exact CPU-support list includes Pentium D 820 and whose power delivery, BIOS and cooling are suitable for this dual-core 95 W processor. LGA775 boards are not universally compatible; some require a newer board revision or BIOS.
- DDR2-533/667, depending on the LGA775 chipset and board; the memory controller is in the chipset.
- Smithfield dual-core 820; 2.80 GHz with no Hyper-Threading. Do not confuse with later 9xx Presler Pentium D models.
- Before fitting, confirm the exact motherboard manufacturer CPU list, revision, minimum BIOS, power delivery, cooling, package and memory type. Socket fit alone does not establish electrical or firmware compatibility; never force a processor.
Service & archival record
Record the complete processor marking and S-spec/ordering code, stepping, board model/revision, chipset, BIOS/microcode, memory configuration, cooler, power profile, physical condition and provenance. Separate measured behavior from published specifications.
Handle the package by its edges and protect contacts. Inspect for contamination, damaged pins/pads, socket damage and uneven cooler pressure before use.
Sources & further reading
- Intel ARK — exact-model lookup: Intel Pentium D 820Intel’s official product-specification search. Legacy products may have limited or archived ARK data; cross-check the physical S-spec and Intel-era documentation.
- Intel Support — desktop processor installation and handlingManufacturer guidance for processor installation; motherboard firmware and platform support must also be confirmed with the board vendor.
- Bitsavers — archived Intel component documentationHistorical Intel processor datasheets and technical manuals for archived Pentium generations; use the appropriate generation document and verify revision-specific errata.
- Various Creators — Intel Pentium D 820 PCIndependent video review; treat as supplementary context, not primary manufacturer documentation.
Published specifications are not a guarantee of system compatibility. Confirm the exact processor marking and board-vendor documentation.