Sun Microsystems, Inc.
Figure 2-4: Single-Core AMD Opteron Processor Architecture
The Sun Fire X4600 server supports both Single-Core and Dual-Core AMD Opteron 800 Series processors.
The Sun Fire X4600 M2 server supports Dual-Core AMD Opteron 8000 Series processors. From the start,
AMD64 processors were designed to add a second core—the port already existed on the crossbar/SRI. Dual-
core AMD Opteron processors have unique instances of L1 cache (I-cache and D-cache) and L2 cache for
each CPU core. Features of the Dual-Core AMD Opteron processor include:
• Socket compatibility with existing 940-pin sockets that are compatible with 90nm single-core processor
architectures
• One die with two CPU cores
• The same power requirements as single-core CPUs
• Individual L1 Instruction cache per CPU core
• Individual L1 Data cache per CPU core
• Individual 1-MB L2 cache per CPU core
• Shared memory controller and HyperTransport interconnects for two cores
• Fully utilized memory and HyperTransport bandwidths
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