AMD Opteron 2358 SE (B3)

The AMD Opteron 2358 SE (B3) is a server/workstation processor from AMD, placed in the Opteron (Barcelona) generation and listed with the architecture label Zen 3. It has 4 cores and 4 threads, a 2.40 GHz base clock, and no listed boost clock. The part is end-of-life, was released in 2008, and uses AMD Socket Fr2. Its launch MSRP was $873. The fact pack records ECC DDR2 memory support, a 119 W TDP, and a 50th percentile aggregate position.

Single-Thread vs Multi-Thread Behavior

The defining structural fact is that the Opteron 2358 SE (B3) has exactly as many threads as cores: 4 cores and 4 threads. There is no simultaneous-multithreading surplus, so the hardware can execute at most 4 threads at once. Any software with more than 4 runnable threads must share those 4 contexts through operating-system time-slicing, which is not the same as parallel execution. This makes the part inherently a 4-thread machine.

Single-threaded behavior is anchored by the 2.40 GHz base clock and by the per-core cache layout. Each core has 64 KB of L1 and 512 KB of L2, so a single thread can keep its working set in a private cache hierarchy. The shared L3 is 2 MB, available to all 4 cores. For single-threaded code, the private L1 and L2 reduce contention with other cores; for multi-threaded code, the shared L3 gives the 4 cores a common pool for data exchange without always going to memory.

Because no boost clock is listed, there is no recorded mechanism for a single core to raise its frequency above 2.40 GHz. The result is a fixed frequency ceiling for both lightly threaded and fully loaded workloads. In real server terms, the single-thread versus multi-thread split is driven less by dynamic clocking and more by the 4/4 thread layout, the private per-core caches, and the shared L3. A dual-channel DDR2 memory bus with 10.7 GB/s of bandwidth is another boundary: 4 cores sharing that bus can pressure the memory system more heavily than a single thread would.

Platform and Compatibility

The processor mounts in AMD Socket Fr2. Memory support is DDR2, with the exact support depending on the motherboard. The memory bus is dual-channel, and the listed memory bandwidth is 10.7 GB/s. ECC memory is supported, which aligns with the server/workstation market segment.

The fact pack lists no integrated graphics, so this processor cannot provide display output on its own. No PCIe information is present in the fact pack, so expansion capability cannot be quantified from the data. The multiplier is locked, because the multiplier-unlocked field is false; user-side frequency adjustment through the multiplier is therefore not supported.

The production status is end-of-life, and the release date is in 2008. The part number is OS2358YAL4BGH. The platform's upgrade path is constrained by the Fr2 socket and by motherboard-dependent DDR2 support. Because the fact pack does not list any successor, forward movement would require a platform change rather than a drop-in replacement on the same socket. The locked multiplier also means that any attempt to adjust operating frequency would have to work around a fixed multiplier, which the fact pack does not document.

Benchmark Performance

The fact pack contains no individual benchmark entries. The benchmarks array is empty, the average benchmark score is 0, and the percentile versus all CPUs is 50. These two aggregate fields do not represent a measured workload result; a score of 0 cannot be a real performance figure for a functioning processor, and the 50th percentile is the median position in the database's CPU list. With no benchmark scores, the database cannot confirm a single-thread or multi-thread advantage over any other processor.

Because the nearestRivals array is also empty, there are no deltaPct values to report. The data therefore permits only one relative statement: this processor occupies the 50th percentile in the database. That is a neutral placement, not evidence of measured competitiveness. The 2.40 GHz base clock and the 4/4 thread layout are the only frequency and parallelism parameters available, but the benchmark layer holds no scores to quantify their effect.

How It Compares

The nearestRivals array is empty, so no named rival, rival benchmark score, or deltaPct figure can be profiled. Without those data points, any statement that the processor is ahead of or behind a particular competitor would be unsupported.

The only comparison point in the dataset is the aggregate percentile: 50, which places the SKU at the midpoint of the database's CPU rankings. That value is accompanied by an average benchmark score of 0, so the percentile is not grounded in actual benchmark runs. In short, the dataset defines this processor more by its absence of documented rivals than by a competitive position against them.

Power and Thermals

The TDP is 119 W. That is the only power figure in the fact pack, and it defines the thermal class for any cooling solution. The platform must be able to dissipate a 119 W envelope. The physical context for that envelope is a 65 nm process node with 463 million transistors on a 285 mm² die. Those figures show a processor from a relatively large-die, older manufacturing generation.

Because no boost clock is listed, there is no recorded higher-frequency state that would create an additional thermal load above the 2.40 GHz base operation. The 119 W TDP therefore applies to the processor at its listed base configuration. The absence of integrated graphics means there is no integrated GPU contributing to the thermal load. The locked multiplier also limits user-configurable frequency adjustment, which keeps thermal behavior within the 119 W class under the listed settings.

Who Should Consider It

The Opteron 2358 SE (B3) is for workloads that can live inside a 4-thread, 4-core envelope. Because the thread count equals the core count, software that scales beyond 4 threads cannot use additional hardware contexts. A workload that fits into exactly 4 threads, uses ECC memory, and runs on a motherboard with the Fr2 socket is the target scenario. The dual-channel DDR2 path with 10.7 GB/s of bandwidth is the memory boundary for such work.

Single-threaded server tasks can use a single core at 2.40 GHz with 64 KB of L1 and 512 KB of L2 dedicated to that core, plus a share of the 2 MB L3. Multi-threaded tasks can occupy all 4 cores, but they share the L3 and the memory bus. This is not a part for workloads that require many concurrent threads, and it is not a part with boost capability, because the fact pack lists no boost clock.

Office-style and lightly threaded productivity workloads could run on this processor, but the server/workstation market segment, ECC memory support, and end-of-life status point to a legacy or maintenance use case rather than a new purchase. The processor has no integrated graphics, so any display output requires a separate graphics adapter; the fact pack does not list PCIe support, so the graphics attachment path is not documented. Gaming is not represented by any benchmark entries; the only performance indicator is the 50th percentile, which is not a gaming score.

FAQ

Q: How many cores and threads does the Opteron 2358 SE (B3) have?

A: It has 4 cores and 4 threads, with a base clock of 2.40 GHz and no listed boost clock.

Q: What memory support is listed?

A: DDR2, with support depending on the motherboard. The memory bus is dual-channel, bandwidth is 10.7 GB/s, and ECC memory is supported.

Q: What cache hierarchy does it use?

A: It uses 64 KB of L1 per core, 512 KB of L2 per core, and 2 MB of shared L3.

Q: Does it include integrated graphics?

A: No. The integrated graphics field is null, so no integrated GPU is listed.

Q: Is the multiplier unlocked?

A: No. The multiplier unlocked field is false, meaning the multiplier is locked.

Q: What is the production status and release date?

A: The processor is end-of-life and was released in 2008. The part number is OS2358YAL4BGH.