AMD Opteron 6276 vs Intel Core i3-8300T Comparison

The AMD Opteron 6276 and Intel Core i3-8300T are both end-of-life processors, but they represent radically different design philosophies and market targets. Benchmark data shows the Opteron 6276 winning every single head-to-head test in the Cinebench suite, with a consistent performance advantage of roughly 13-14% across both single-core and multi-core workloads. Despite this, the two processors land in the same 39th percentile overall, and their average benchmark scores are nearly identical, with the Opteron at 1560 and the i3-8300T at 1586. The i3-8300T, however, does so with a 35W TDP compared to the Opteron’s 115W, making the Intel part a far more efficient choice for desktop workloads, while the Opteron’s 16 cores and quad-channel memory target server and workstation environments.

FAQ

Q: Which processor has more cores?

A: The AMD Opteron 6276 has 16 cores and 16 threads, while the Intel Core i3-8300T has 4 cores and 4 threads.

Q: Does the Intel Core i3-8300T have integrated graphics?

A: Yes, the i3-8300T includes UHD Graphics 630. The AMD Opteron 6276 has no integrated graphics, so a discrete GPU is required for any display output.

Q: Which CPU supports faster memory bandwidth?

A: The AMD Opteron 6276 supports quad-channel DDR3 memory with a bandwidth of 51.2 GB/s. The Intel Core i3-8300T supports dual-channel DDR4 with a bandwidth of 38.4 GB/s.

Q: What is the process node for each chip?

A: The Intel Core i3-8300T is built on a 14 nm process, while the AMD Opteron 6276 uses a 32 nm process from GlobalFoundries.

Q: How do their average benchmark scores compare?

A: The Intel Core i3-8300T has an average benchmark score of 1586, while the AMD Opteron 6276 scores 1560. The difference is less than 2%, placing both in the same performance tier.

Q: What is the launch MSRP of each processor?

A: The Intel Core i3-8300T had a launch MSRP of $138. The AMD Opteron 6276 had a launch MSRP of $788.

Architecture Differences

The architectural gap between these two chips is substantial, reflecting their different release dates and target markets. The Intel Core i3-8300T is a Coffee Lake desktop part built on a 14 nm process, featuring 4 cores and 4 threads. Its cache layout is straightforward: 64 KB of L1 per core, 256 KB of L2 per core, and 8 MB of shared L3 cache. It uses a dual-channel DDR4 memory controller and provides 16 PCIe Gen 3 lanes. The i3-8300T also integrates UHD Graphics 630, making it a complete package for a basic desktop system.

The AMD Opteron 6276 is a server/workstation processor from the Opteron 6000 series, codenamed Interlagos and built on the Bulldozer architecture. It uses a 32 nm process from GlobalFoundries and packs 16 cores with 16 threads. Its cache hierarchy is different: 768 KB of L1, 2 MB of L2 per module, and 8 MB of L3 per die. The chip is physically large, with a die size of 2x 315 mm² and 2,400 million transistors. It supports quad-channel DDR3 memory with a higher bandwidth of 51.2 GB/s, and its PCIe interface is Gen 2. The Opteron has no integrated graphics, relying on a separate GPU. Notably, the Opteron’s base clock is 2.30 GHz with a boost clock of 3.20 GHz, while the i3-8300T runs at a fixed 3.20 GHz with no boost clock.

Head-to-Head Benchmarks

The head-to-head results are unambiguous: the AMD Opteron 6276 wins all six Cinebench tests, with the Intel Core i3-8300T trailing by roughly 13-14% in every case. In Cinebench R15 multi-core, the Opteron scores 543 against the i3-8300T’s 469, a delta of -13.6%. The single-core R15 test shows a similar pattern: 76 for the Opteron versus 66 for the i3-8300T, a -13.2% difference.

Moving to Cinebench R20, the Opteron again leads in multi-core with 2265 points versus 1955 for the Intel part, a -13.7% gap. In single-core R20, the Opteron scores 319 versus 275, a -13.8% margin. The trend continues in Cinebench R23, where the Opteron’s multi-core score of 5395 beats the i3-8300T’s 4656 by -13.7%, and its single-core score of 761 beats 657 by -13.7%. The consistency of the delta across all tests suggests a fundamental per-clock advantage for the older AMD architecture, despite its larger process node. The Intel part does not win a single benchmark in this comparison, making the Opteron the clear performance victor in raw compute.

Specification Differences

The two processors differ in nearly every major specification category. The most obvious distinction is core count: the AMD Opteron 6276 offers 16 cores versus 4 on the Intel Core i3-8300T. Thread counts match core counts for both (16 and 4, respectively). The base clocks differ, with the i3-8300T at 3.20 GHz and the Opteron at 2.30 GHz, though the Opteron has a boost clock of 3.20 GHz while the i3-8300T has none listed. TDP is a major split: 35W for the Intel part versus 115W for the AMD part.

Process technology also diverges, with Intel using 14 nm and AMD using 32 nm. The Opteron’s die is much larger at 2x 315 mm² versus 126 mm² for the i3-8300T, and it contains 2,400 million transistors. Cache configurations are different: the i3-8300T has 64 KB L1 per core and 256 KB L2 per core, while the Opteron has 768 KB L1 total and 2 MB L2 per module. Both have 8 MB of L3, but the i3-8300T’s is shared while the Opteron’s is per die. Memory support differs entirely: DDR4 dual-channel on Intel versus DDR3 quad-channel on AMD, with bandwidth of 38.4 GB/s versus 51.2 GB/s. The i3-8300T has integrated graphics and PCIe Gen 3, the Opteron has none and PCIe Gen 2. The Opteron uses Socket G34, while the i3-8300T uses Intel Socket 1151. Both support ECC memory.

The Verdict

The data is clear for raw compute performance: the AMD Opteron 6276 is the faster processor, winning every Cinebench test by about 13-14%. If the primary criterion is maximum multi-threaded throughput, the Opteron’s 16 cores deliver more work despite its lower base clock. However, the Intel Core i3-8300T is not without merit. Its 35W TDP is dramatically lower than the Opteron’s 115W, making it a far more energy-efficient choice for desktop systems. The i3-8300T also offers integrated graphics, which eliminates the need for a discrete GPU. The Opteron’s advantages are tied to its server heritage: quad-channel memory bandwidth and a massive core count, but it lacks any integrated graphics and requires a platform with a G34 socket.

For a desktop user building a low-power machine, the i3-8300T is the sensible pick. For a server workload that can use 16 threads, the Opteron is the better performer. The average benchmark scores are nearly identical (1586 vs 1560), but the Opteron’s wins are consistent across all Cinebench versions. The i3-8300T’s only saving grace in a performance comparison is its energy efficiency and integrated graphics. The Opteron wins on raw speed, but the i3-8300T wins on efficiency and platform simplicity.

Where Each One Wins

The AMD Opteron 6276 wins in every benchmark category measured here. Its 16 cores and 16 threads provide a clear advantage in multi-threaded Cinebench workloads, with scores of 543, 2265, and 5395 in R15, R20, and R23 respectively. It also wins in single-core tests, scoring 76, 319, and 761 across the same three Cinebench versions. The Opteron’s higher memory bandwidth (51.2 GB/s) and quad-channel support make it better suited for memory-intensive server tasks. Its 2,400 million transistors and large die size indicate a processor built for heavy compute, not efficiency.

The Intel Core i3-8300T wins in power efficiency and platform integration. At 35W TDP, it uses roughly a third of the Opteron’s power budget. Its integrated UHD Graphics 630 means a complete system can be built without a discrete GPU, which is impossible with the Opteron. The i3-8300T’s smaller die (126 mm²) and 14 nm process make it a more modern, compact design. It also supports PCIe Gen 3, offering newer connectivity standards. While it loses every performance benchmark, its lower launch MSRP of $138 versus $788 for the Opteron makes it a more accessible option for desktop builds, though pricing should not be the only consideration given the Opteron’s superior performance.