638894-B21 HP Intel Xeon E5645 6-Core Processor Upgrade
638894-B21 Overview
This listing covers the 638894-B21 HP Intel Xeon E5645 6-Core Processor Upgrade with ordering reference 638894-B21. The supplied product data records model: E5645; cores: 6; threads: 12; base clock: 2.40 GHz; L3 cache: 12 MB.
Compatibility should be checked against the exact server, workstation or motherboard model before purchase. The listed socket is LGA1366. Quote or compatibility enquiries should reference 638894-B21. Pricing is available by quotation; include the part number and required quantity in the enquiry. The source specification lists the condition as OEM.
Description
638894-B21 HP Intel Xeon E5645 6-Core Processor Upgrade Product Details
This listing covers the 638894-B21 HP Intel Xeon E5645 6-Core Processor Upgrade with ordering reference 638894-B21. The supplied product data records model: E5645; cores: 6; threads: 12; base clock: 2.40 GHz; L3 cache: 12 MB.
Key Specifications
| Specification | Product Data |
|---|---|
| Part Number | 638894-B21 |
| Listing Brand | HP |
| Product Type | Processor Upgrade |
| Catalog Category | HPE CPU |
| Processor Type | Server |
| Series | Xeon Processor |
| Model | E5645 |
| Code Name | Westmere EP |
| Core Stepping | B1 |
| Manufacturing Process | 32 NM |
| CPU Id String | 206C2 |
| Cores | 6 |
| Threads | 12 |
| Base Clock | 2.40 GHz |
| L3 Cache | 12 MB |
| QuickPath Interconnect | 5.86 GT/S |
| Thermal Design Power | 80 Watts |
| Vid Voltage Range | 0.750V-1.350V |
| Socket | LGA1366 |
| Condition | OEM |
Compatibility and Selection Guidance
Compatibility should be checked against the exact server, workstation or motherboard model before purchase. The listed socket is LGA1366. Quote or compatibility enquiries should reference 638894-B21.
- Match the full part number with the supported hardware list for the target system.
- Verify socket, generation, firmware or BIOS support and thermal design power.
- Confirm whether the supplied item is a processor only or an upgrade kit with additional hardware.
Ordering Information
Pricing is available by quotation; include the part number and required quantity in the enquiry. The source specification lists the condition as OEM. Use 638894-B21 on the quotation request so the exact item can be checked.
Product images are for reference. Verify the part number, technical specifications, compatibility, supplied condition and included components before purchase.

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