Side by side comparison and review of Intel Xeon W3540 and Intel Xeon D-1521. 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 Xeon W3540 | Intel Xeon D-1521 |
|---|
| Product Type | Processor | Processor |
|---|
| PROCESSOR | Intel Xeon W3540 | Intel Xeon D-1521 |
|---|
| Type | Intel Xeon W3540 | Intel Xeon D-1521 |
|---|
| ARCHITECTURE |
|---|
| Processor Qty | 1 | 1 |
|---|---|---|
| Packaging Type | FC-LGA8 | - |
| Compatible Processor Socket | LGA1366 Socket | FCBGA1667 Socket |
| Manufacturing Process | 45 nm | 14 nm |
| Thermal Design Power | 130 W | 45 W |
| Thermal Specification | 67 °C | - |
| PCI Express Revision | - | 2.0/3.0 |
| PCI Express Configurations | - | X16, x4, x8 |
| PCI Express Lanes Qty | - | 32 |
| Architecture Features | Enhanced SpeedStep technology, streaming SIMD extensions 2, Hyper-Threading Technology, integrated memory controller, streaming SIMD extensions 3, Demand Based Switching, Execute Disable Bit capability, Intel Virtualization Technology, Intel 64 Technology, Intel I/O Acceleration Technology, streaming SIMD extensions 4 | Enhanced SpeedStep technology, Hyper-Threading Technology, Execute Disable Bit capability, Intel Virtualization Technology, Intel 64 Technology, Intel Trusted Execution Technology, Intel Turbo Boost Technology 2.0, Intel AES New Instructions (AES-NI), Thermal Monitoring Technologies, Intel Virtualization Technology for Directed I/O (VT-d), Idle States, Intel VT-x with Extended Page Tables (EPT), Intel Secure Key, Intel Advanced Vector Extensions 2 (AVX2.0), Intel TSX-NI, Intel OS Guard |
| PERFORMANCE |
|---|
| Number of Cores | Quad-Core | Quad-Core |
|---|---|---|
| Number of Threads | 8 threads | 8 threads |
| Clock Speed (Frequency) | 2.93 GHz | 2.4 GHz |
| Max Turbo Speed | 3.2 GHz | 2.7 GHz |
| Bus Speed | 1066 MHz | - |
| 64-bit Computing | Yes | - |
| CACHE MEMORY |
|---|
| Cache | 8 MB | 6 MB |
|---|---|---|
| Cache Memory Details | L3 - 8 MB | 6 MB |
| Installed Size | 8 MB | - |
| EXPANSION & CONNECTIVITY | Intel Xeon W3540 | Intel Xeon D-1521 |
|---|
| Expansion Slots | 1 processor | - |
|---|---|---|
| Compatible Slots | 1 x processor | - |
| MISCELLANEOUS | Intel Xeon W3540 | Intel Xeon D-1521 |
|---|
| Service & Support | Limited warranty - 90 days | - |
|---|
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