CPU Comparison

The AMD Ryzen Embedded V1605B and AMD Opteron 3365 are two very different processors that land at nearly the same overall performance level, despite their architectural chasm. The data shows the V1605B wins the head-to-head benchmark comparison 2-1, but the Opteron 3365 takes the newer Cinebench R23 multi-core test. The V1605B is the clear choice for modern workloads and efficiency, while the Opteron 3365 is a legacy part that only makes sense for specific multi-threaded tasks where its extra cores shine.

The Verdict

The AMD Ryzen Embedded V1605B is the processor to pick for nearly any modern application. It delivers a crushing 87.4% advantage over the Opteron 3365 in Cinebench R15 multi-core, and a 72% lead in Cinebench R23 single-core. Its 15W TDP, DDR4 memory support, and active production status make it a viable option for current systems, whereas the Opteron 3365 is end-of-life. The Opteron 3365 does have one meaningful win: it scores 3470 in Cinebench R23 multi-core versus the V1605B’s 3160, an 8.9% margin. That makes it a niche pick for heavily parallel, older workloads where raw core count matters more than per-core speed. However, the Opteron’s 65W TDP, DDR3 memory, and lack of a modern boost clock architecture make it a poor fit for anything beyond legacy server tasks. The average benchmark scores are nearly identical, 1196 for the V1605B and 1194 for the Opteron 3365, but the V1605B achieves that parity with far better efficiency and a much more modern feature set.

Architecture Differences

The two chips come from completely different eras of AMD design. The Ryzen Embedded V1605B uses the Zen architecture on a 14 nm process, built by GlobalFoundries, with a die size of 210 mm² and 4,950 million transistors. The Opteron 3365 uses the much older K10 architecture (codename Delhi) on a 32 nm process, also from GlobalFoundries, with a die size of 315 mm² and just 1,200 million transistors. That process gap is enormous, the V1605B packs over four times as many transistors into a smaller die.

The core configurations are also fundamentally different. The V1605B has 4 cores and 8 threads, relying on simultaneous multithreading to double its logical thread count. The Opteron 3365 has 8 physical cores but only 8 threads, meaning no SMT support. The cache hierarchies reflect this divergence. The V1605B has 128 KB of L1 per core, 512 KB of L2 per core, and 2 MB of shared L3. The Opteron 3365 has 384 KB of L1, 4 MB of L2, and 8 MB of shared L3, a larger pool overall, but spread across more cores and a less efficient architecture.

The V1605B integrates Radeon Vega 8 graphics directly on the package, while the Opteron 3365 relies on chipset-based graphics available on certain motherboards. Memory support differs as well: the V1605B uses DDR4 in a dual-channel configuration, while the Opteron 3365 uses DDR3 with a quoted memory bandwidth of 29.9 GB/s. The Opteron 3365 also supports PCIe Gen 2, a standard that predates the V1605B’s platform by several years. The V1605B was released on 2018-02-20, while the Opteron 3365 has no release date in the data, and its production status is listed as end-of-life.

Head-to-Head Benchmarks

The benchmark results tell a clear story of architectural advantage. In Cinebench R15 multi-core, the Ryzen Embedded V1605B scores 654 versus the Opteron 3365’s 349, a 87.4% difference. This is a staggering margin in a multi-threaded test, especially considering the Opteron has twice as many physical cores. The Zen architecture’s superior instruction-level parallelism and memory latency handling make the V1605B far more efficient per core.

The single-core results reinforce this. In Cinebench R23 single-core, the V1605B scores 841 versus the Opteron’s 489, a 72% lead. This is a massive gap that reflects the generational leap in per-core performance between K10 and Zen. The Opteron’s 2.30 GHz base clock and 3.30 GHz boost clock simply cannot compete with the V1605B’s 2000.00 MHz base and 3.60 GHz boost, even on paper, the per-clock efficiency difference is the real story.

The one bright spot for the Opteron 3365 is Cinebench R23 multi-core, where it scores 3470 versus the V1605B’s 3160, an 8.9% margin. This is likely because the R23 multi-core test scales more aggressively with raw core count, and the Opteron’s 8 physical cores can out-muscle the V1605B’s 4 cores with SMT in a sustained, heavily parallel workload. However, this win comes with a major caveat: the Opteron’s 65W TDP is over four times higher than the V1605B’s 15W, making that extra performance very costly in power terms.

Specification Differences

The two processors differ on nearly every major specification. The V1605B has 4 cores and 8 threads, while the Opteron 3365 has 8 cores and 8 threads. The V1605B runs at 2000.00 MHz base and 3.60 GHz boost, while the Opteron runs at 2.30 GHz base and 3.30 GHz boost. The V1605B has a 15W TDP; the Opteron is rated at 65W. The V1605B uses AMD Socket FP5, the Opteron uses AMD Socket AM3+. The V1605B is built on a 14 nm process, the Opteron on 32 nm. The V1605B has 4,950 million transistors; the Opteron has 1,200 million. The V1605B die is 210 mm², the Opteron’s is 315 mm².

Cache configurations differ as noted: the V1605B has 128 KB L1 per core, 512 KB L2 per core, and 2 MB shared L3, while the Opteron has 384 KB L1, 4 MB L2, and 8 MB shared L3. The V1605B supports DDR4 memory, the Opteron supports DDR3. The V1605B has integrated Radeon Vega 8 graphics; the Opteron has graphics only on certain motherboards as a chipset feature. The V1605B has no listed PCIe support, while the Opteron has PCIe Gen 2. The V1605B is in the Desktop market segment and is Active in production; the Opteron is in the Server/Workstation segment and is end-of-life. The Opteron has a part number of OS3365OLW8KHK; the V1605B has no listed part number. Neither chip supports ECC memory, and neither has an unlocked multiplier.

FAQ

Q: Which processor has a higher average benchmark score?

A: The AMD Ryzen Embedded V1605B has an average benchmark score of 1196, while the AMD Opteron 3365 has a score of 1194, a difference of just 0.2%.

Q: How much faster is the Ryzen Embedded V1605B in single-core performance?

A: The V1605B scores 841 in Cinebench R23 single-core versus the Opteron 3365’s 489, giving it a 72% lead in that test.

Q: Does the Opteron 3365 win any benchmark against the V1605B?

A: Yes, the Opteron 3365 wins Cinebench R23 multi-core with a score of 3470 versus the V1605B’s 3160, an 8.9% margin.

Q: What is the difference in power consumption between the two chips?

A: The Ryzen Embedded V1605B has a TDP of 15W, while the Opteron 3365 has a TDP of 65W, making the V1605B significantly more power-efficient.

Q: Which chip has more physical cores?

A: The AMD Opteron 3365 has 8 physical cores, while the AMD Ryzen Embedded V1605B has 4 physical cores (with 8 threads via SMT).

Q: Are both processors still in production?

A: No, the Ryzen Embedded V1605B is listed as Active, while the Opteron 3365 is listed as end-of-life.