Side by side comparison and review of Intel Celeron B820 and Intel Xeon E5540. Compare overall performance, core and thread counts, cache memory, speed, power efficiency, dimensions, socket compatibility and other key specifications and features to simplify the choice of your perfect CPU. Our goal is to make it easier for you to decide on the processor that will best meet your expectations by revealing the main differences between the products.
| GENERAL | Intel Celeron B820 | Intel Xeon E5540 |
|---|
| Product Type | Processor (mobile) | Processor |
|---|
| PROCESSOR | Intel Celeron B820 | Intel Xeon E5540 |
|---|
| Type | Intel Celeron B820 | Intel Xeon E5540 |
|---|
| ARCHITECTURE |
|---|
| Processor Qty | 1 | 1 |
|---|---|---|
| Compatible Processor Socket | PGA988 Socket | LGA1366 Socket |
| Core Voltage | - | 0.75 V - 1.35 V |
| Manufacturing Process | 32 nm | 45 nm |
| Thermal Design Power | 35 W | 80 W |
| Thermal Specification | 100 °C | 76 °C |
| PCI Express Revision | 2.0 | - |
| PCI Express Configurations | 1x16, 2x8, 1x8+2x4 | - |
| PCI Express Lanes Qty | 16 | - |
| Architecture Features | Enhanced SpeedStep technology, Execute Disable Bit capability, Intel Virtualization Technology, Intel 64 Technology, Intel Fast Memory Access, Intel Flex Memory Access, Thermal Monitoring Technologies, Idle States | Enhanced SpeedStep technology, Demand Based Switching, Intel Virtualization Technology, Intel Turbo Boost Technology, Intel Dynamic Acceleration |
| PERFORMANCE |
|---|
| Number of Cores | Dual-Core | Quad-Core |
|---|---|---|
| Number of Threads | 2 threads | 8 threads |
| Clock Speed (Frequency) | 1.7 GHz | 2.53 GHz |
| Max Turbo Speed | - | 2.8 GHz |
| Bus Speed | - | 1066 MHz |
| 64-bit Computing | - | Yes |
| CACHE MEMORY |
|---|
| Cache | 2 MB | 8 MB |
|---|---|---|
| Cache Level 1 Size | - | 256 KB |
| Cache Memory Details | L3 - 2 MB | L2 - SLC NAND Flash - 8 MB |
| Installed Size | 2 MB | 8 MB |
| Type | - | SLC NAND Flash |
| RAM |
|---|
| Technology | - | DDR3 SDRAM - 1066 MHz |
|---|
| INTEGRATED GRAPHICS (GPU) | Intel Celeron B820 | Intel Xeon E5540 |
|---|
| Type | Intel HD Graphics with Dynamic Frequency | - |
|---|---|---|
| Base Frequency | 650 MHz | - |
| Max Dynamic Frequency | 1.05 GHz | - |
| Features | Intel FDI | - |
| EXPANSION & CONNECTIVITY | Intel Celeron B820 | Intel Xeon E5540 |
|---|
| Compatible Slots | - | 1 x processor |
|---|
| MISCELLANEOUS | Intel Celeron B820 | Intel Xeon E5540 |
|---|
| Included Accessories | - | Heat sink, voltage regulator module |
|---|---|---|
| Compliant Standards | - | RoHS |
| Service & Support | - | Limited warranty - 1 year - on-site |
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