AMD Opteron 6376 vs Intel Core i5-6500T Comparison

The AMD Opteron 6376 and Intel Core i5-6500T represent two very different approaches to computing, separated by nearly three years of silicon evolution. The Opteron is a 16-core server processor built on a 32 nm process, while the i5-6500T is a 4-core desktop chip on Intel's 14 nm node. Despite this architectural gulf, their overall benchmark averages are remarkably close, with the Opteron scoring 1370 and the i5-6500T scoring 1362. However, a closer look at the individual benchmark results reveals a consistent, if moderate, advantage for the older AMD part across every Cinebench test, while the Intel chip counters with its own wins in raw platform features and efficiency.

FAQ

Q: Which processor has more cores and threads?

A: The AMD Opteron 6376 has 16 cores and 16 threads, while the Intel Core i5-6500T has 4 cores and 4 threads.

Q: How does the AMD Opteron 6376 compare to the Intel Core i5-6500T in multi-core Cinebench R23?

A: The Opteron 6376 scores 4736 in Cinebench R23 multi-core, which is 16.8% higher than the i5-6500T's score of 4054.

Q: What is the average benchmark score for each processor?

A: The AMD Opteron 6376 has an average benchmark score of 1370, while the Intel Core i5-6500T has an average score of 1362.

Q: Do both processors support ECC memory?

A: No. The AMD Opteron 6376 supports ECC memory, while the Intel Core i5-6500T does not.

Q: What are the TDP ratings for these two chips?

A: The AMD Opteron 6376 has a TDP of 115 watts, whereas the Intel Core i5-6500T has a much lower TDP of 35 watts.

Q: Which processor has a higher single-core Cinebench R15 score?

A: The AMD Opteron 6376 scores 67 in Cinebench R15 single-core, beating the Intel Core i5-6500T's score of 57 by 17.5%.

Architecture Differences

The two processors are built on fundamentally different architectures, reflecting their distinct market segments. The AMD Opteron 6376 uses the Piledriver architecture under the "Abu Dhabi" codename, part of the Opteron 6000 series. It is fabricated on a 32 nm process by GlobalFoundries, with a die size of 2x 315 mm² and containing 2,400 million transistors. In contrast, the Intel Core i5-6500T uses the Skylake architecture, built on Intel's 14 nm process with a die size of 122 mm².

Cache organization differs significantly between the two. The Opteron 6376 features a large L1 cache of 768 KB, an L2 cache of 2 MB per module, and an L3 cache of 8 MB per die. The i5-6500T has a smaller footprint with 64 KB of L1 cache per core, 256 KB of L2 cache per core, and 6 MB of shared L3 cache. The memory subsystem also diverges: the Opteron 6376 supports quad-channel DDR3 memory with a bandwidth of 59.7 GB/s, while the i5-6500T supports dual-channel DDR3 and DDR4 memory with a bandwidth of 34.1 GB/s.

Platform features highlight their different purposes. The AMD chip uses the AMD Socket G34 and supports PCIe Gen 2, while the Intel chip uses Socket 1151 and offers PCIe Gen 3 with 16 lanes from the CPU. The i5-6500T includes integrated HD Graphics 530, whereas the Opteron 6376 has no integrated graphics. The Opteron 6376 is a server/workstation part with ECC memory support, while the i5-6500T is a desktop processor without ECC support. Both processors are end-of-life and have locked multipliers.

Head-to-Head Benchmarks

The head-to-head data shows a clean sweep for the AMD Opteron 6376 across all six Cinebench tests. In Cinebench R15, the Opteron wins multi-core with a score of 477 against 408 for the i5-6500T, a 16.9% advantage. The single-core test in R15 shows a similar margin, with the Opteron scoring 67 and the i5-6500T scoring 57, yielding a 17.5% lead.

Moving to Cinebench R20, the pattern holds. The Opteron 6376 scores 1989 in multi-core, beating the i5-6500T's 1702 by 16.9%. In single-core, the Opteron scores 280 against 240, a 16.7% edge. Cinebench R23 continues the trend with the Opteron scoring 4736 in multi-core versus 4054 for the Intel chip, another 16.8% margin. The single-core R23 test shows the Opteron at 668 and the i5-6500T at 572, again 16.8% higher.

These consistent delta percentages across all tests suggest that the Opteron's advantage is not workload-specific but rather a uniform performance lead in Cinebench. The i5-6500T does not win any of the six head-to-head tests, with a 0-6 record. However, it is importantly the i5-6500T has additional Geekbench scores in its benchmark list, where it scores 2843 in multi-core and 1016 in single-core, though no direct comparison with the Opteron is available for those tests.

The Verdict

The data presents a clear picture for raw compute performance: the AMD Opteron 6376 outperforms the Intel Core i5-6500T in every Cinebench benchmark measured. The margins are consistent, hovering around 16-17% across both single-core and multi-core tests. This is notable because the Opteron is a 2012-era server part with a much higher TDP of 115 watts, while the i5-6500T is a 2015-era desktop chip with a 35-watt TDP.

For users prioritizing maximum multi-threaded throughput, the Opteron's 16 cores and 16 threads deliver decisively better results in rendering workloads like Cinebench. The i5-6500T, however, offers a significantly more efficient platform with lower power consumption, a smaller die, integrated graphics, and support for both DDR3 and DDR4 memory. The i5-6500T also benefits from a newer PCIe Gen 3 interface.

The choice depends on the use case. The Opteron 6376 is the better processor for compute-heavy server or workstation tasks where its 16-core advantage can be fully utilized. The i5-6500T is more suited for a desktop environment where power efficiency, integrated graphics, and a modern platform are priorities, even if it lags in raw Cinebench scores.

Specification Differences

The two processors differ across nearly every specification category. The AMD Opteron 6376 has 16 cores and 16 threads, compared to 4 cores and 4 threads for the Intel Core i5-6500T. The Opteron has a base clock of 2.30 GHz and a boost clock of 3.20 GHz, while the i5-6500T has a base clock of 2.50 GHz and a boost clock of 3.10 GHz.

The TDP is a major differentiator: the Opteron 6376 draws 115 watts, while the i5-6500T draws only 35 watts. They use different sockets, with the Opteron on AMD Socket G34 and the i5-6500T on Intel Socket 1151. The Opteron's process node is 32 nm from GlobalFoundries, whereas the i5-6500T uses Intel's 14 nm process. The Opteron has a die size of 2x 315 mm², while the i5-6500T has a die size of 122 mm².

Cache configurations differ in structure: the Opteron has 768 KB of L1 cache, 2 MB of L2 per module, and 8 MB of L3 per die, while the i5-6500T has 64 KB of L1 per core, 256 KB of L2 per core, and 6 MB of shared L3. Memory support sees the Opteron using quad-channel DDR3 with 59.7 GB/s bandwidth, while the i5-6500T uses dual-channel DDR3 and DDR4 with 34.1 GB/s bandwidth. The Opteron supports ECC memory, the i5-6500T does not. PCIe support is Gen 2 on the Opteron and Gen 3 with 16 lanes on the i5-6500T. The i5-6500T includes HD Graphics 530, while the Opteron has no integrated graphics.

Where Each One Wins

The AMD Opteron 6376 wins in all measured compute benchmarks, with a 16.9% lead in Cinebench R15 multi-core, a 17.5% lead in R15 single-core, a 16.9% lead in R20 multi-core, a 16.7% lead in R20 single-core, a 16.8% lead in R23 multi-core, and a 16.8% lead in R23 single-core. This makes it the clear choice for applications that rely on multi-threaded rendering or calculation, such as Cinebench workloads. Its 16 cores provide substantial parallel processing capability, and its quad-channel memory with 59.7 GB/s bandwidth and ECC support make it suitable for server and workstation environments where data integrity and memory throughput are critical.

The Intel Core i5-6500T wins in platform efficiency and modern features. Its 35-watt TDP is dramatically lower than the Opteron's 115 watts, making it far more energy-efficient. It supports both DDR3 and DDR4 memory, offering flexibility in system building, and its PCIe Gen 3 interface provides higher bandwidth for modern peripherals. The integrated HD Graphics 530 eliminates the need for a discrete GPU in basic desktop tasks, which the Opteron cannot offer. For a desktop user building a compact, low-power system, the i5-6500T is the preferable choice, even though it loses in all direct Cinebench comparisons.