AMD EPYC 7643 vs AMD Ryzen 3 PRO 8300GE Comparison

The AMD EPYC 7643 and AMD Ryzen 3 PRO 8300GE occupy opposite ends of the AMD spectrum, and the benchmark data reflects a complete mismatch in workload focus. The EPYC 7643, a 48-core server processor, dominates every single Cinebench test by a margin of roughly 417%, while the Ryzen 3 PRO 8300GE, a 4-core desktop chip, counters with a fraction of the power draw and a much smaller physical footprint. The data shows that these are not competing products but rather complementary solutions for entirely different computing environments.

The Verdict

The benchmark results are unambiguous: the AMD EPYC 7643 wins all six Cinebench comparisons, with deltas ranging from 416.7% to 419.2%. In multi-core workloads, the EPYC 7643 scores 64,642 in Cinebench R23 multi-core versus 12,511 for the Ryzen 3 PRO 8300GE, representing a 416.7% advantage. Single-core performance tells the same story, with the EPYC 7643 posting 9,126 in Cinebench R23 single-core against 1,766, a 416.8% lead. For any user whose primary metric is raw compute throughput, the EPYC 7643 is the only choice from this data.

However, the Ryzen 3 PRO 8300GE is not without its own rationale. It operates at a 35W TDP compared to the EPYC 7643's 225W, uses the modern AM5 socket, and includes integrated Radeon 740M graphics. The EPYC 7643 has no integrated graphics. The Ryzen 3 PRO 8300GE also supports DDR5 memory, while the EPYC 7643 is limited to DDR4, and the desktop chip's base clock of 3.40 GHz and boost clock of 4.90 GHz are substantially higher than the EPYC 7643's 2.30 GHz and 3.60 GHz. The verdict from the data: pick the EPYC 7643 for maximum multi-threaded server performance; pick the Ryzen 3 PRO 8300GE for a low-power desktop build with modern memory support and integrated graphics.

Architecture Differences

The architectural gap between these two processors is generational and physical. The EPYC 7643 uses the Zen 3 architecture on the Milan codename, fabricated on a 7 nm process at TSMC. The Ryzen 3 PRO 8300GE uses the newer Zen 4 architecture on the Phoenix2 codename, fabricated on a 4 nm process, also at TSMC. The die size difference is notable: the EPYC 7643 uses a multi-chip design with 8x 81 mm² dies, totaling 33,200 million transistors, while the Ryzen 3 PRO 8300GE uses a monolithic 137 mm² die with 20,900 million transistors.

Cache hierarchies differ substantially. Both share 64 KB of L1 cache per core, but the EPYC 7643 has 512 KB of L2 cache per core versus 1 MB per core on the Ryzen 3 PRO 8300GE. The L3 cache is where the EPYC 7643 pulls far ahead, with 256 MB shared, compared to just 8 MB shared on the Ryzen 3 PRO 8300GE. Memory support also diverges: the EPYC 7643 uses DDR4 with an eight-channel memory bus and 204.8 GB/s of bandwidth, while the Ryzen 3 PRO 8300GE uses DDR5 with a dual-channel bus and 83.2 GB/s of bandwidth. Both support ECC memory.

The process node advantage belongs to the Ryzen 3 PRO 8300GE, but the EPYC 7643 compensates with sheer core count and cache capacity. The EPYC 7643 is a server/workstation part, while the Ryzen 3 PRO 8300GE is a desktop part. The EPYC 7643 offers PCIe Gen 4 with 128 lanes, while the Ryzen 3 PRO 8300GE offers PCIe Gen 4 with 14 lanes. The Ryzen 3 PRO 8300GE includes integrated Radeon 740M graphics, a feature entirely absent from the EPYC 7643.

Head-to-Head Benchmarks

The Cinebench results form a consistent pattern: the EPYC 7643 outperforms the Ryzen 3 PRO 8300GE by a nearly identical percentage across all tests. In Cinebench R15 multi-core, the EPYC 7643 scores 6,515 versus 1,260, a 417.1% delta. In R15 single-core, the scores are 919 versus 177, a 419.2% delta. Moving to Cinebench R20, the EPYC 7643 scores 27,149 multi-core versus 5,254, a 416.7% delta, and 3,832 single-core versus 741, a 417.1% delta.

The trend continues in Cinebench R23, the most demanding test. The EPYC 7643 achieves 64,642 multi-core versus 12,511, a 416.7% delta, and 9,126 single-core versus 1,766, a 416.8% delta. The consistency of these deltas across all six tests suggests that the performance gap is driven by a fundamental architectural advantage rather than a single workload characteristic. The EPYC 7643 has 48 cores and 96 threads, while the Ryzen 3 PRO 8300GE has 4 cores and 8 threads, giving the server chip a 12x core advantage.

Interestingly, the single-core deltas are slightly higher than the multi-core deltas in every case. This suggests that the EPYC 7643's per-core performance is also superior, despite its lower clock speeds. The EPYC 7643's boost clock of 3.60 GHz is lower than the Ryzen 3 PRO 8300GE's 4.90 GHz, yet it still wins single-core tests by over 400%. This indicates that the EPYC 7643's architecture, likely with its massive 256 MB L3 cache, delivers better instructions-per-clock. The Ryzen 3 PRO 8300GE's higher clocks do not overcome the EPYC 7643's structural advantages.

Specification Differences

The most glaring difference is core count: 48 cores and 96 threads on the EPYC 7643 versus 4 cores and 8 threads on the Ryzen 3 PRO 8300GE. Clock speeds also differ, with the EPYC 7643 at 2.30 GHz base and 3.60 GHz boost, while the Ryzen 3 PRO 8300GE operates at 3.40 GHz base and 4.90 GHz boost. Power consumption is a major differentiator, with the EPYC 7643 rated at 225W TDP versus 35W TDP for the Ryzen 3 PRO 8300GE.

The sockets are incompatible: the EPYC 7643 uses AMD Socket SP3, while the Ryzen 3 PRO 8300GE uses AMD Socket AM5. The process node differs, with the EPYC 7643 on 7 nm and the Ryzen 3 PRO 8300GE on 4 nm. Transistor counts are 33,200 million versus 20,900 million, and die sizes are 8x 81 mm² versus 137 mm². Cache differences are significant: L2 cache is 512 KB per core on the EPYC 7643 versus 1 MB per core on the Ryzen 3 PRO 8300GE, while L3 cache is 256 MB shared versus 8 MB shared.

Memory support differs completely: DDR4 with eight-channel support and 204.8 GB/s bandwidth on the EPYC 7643, versus DDR5 with dual-channel support and 83.2 GB/s bandwidth on the Ryzen 3 PRO 8300GE. PCIe lanes are 128 versus 14, both Gen 4. The EPYC 7643 has no integrated graphics, while the Ryzen 3 PRO 8300GE includes Radeon 740M. The market segments are server/workstation versus desktop. The EPYC 7643 has a launch MSRP of $4995, while the Ryzen 3 PRO 8300GE has no listed launch MSRP. The EPYC 7643 was released in March 2021, while the Ryzen 3 PRO 8300GE was released in April 2024.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The AMD EPYC 7643 is significantly faster. In Cinebench R23 multi-core, it scores 64,642 compared to 12,511 for the Ryzen 3 PRO 8300GE, a 416.7% advantage.

Q: Does the Ryzen 3 PRO 8300GE have integrated graphics?

A: Yes, the Ryzen 3 PRO 8300GE includes Radeon 740M integrated graphics. The EPYC 7643 has no integrated graphics.

Q: Which processor supports DDR5 memory?

A: Only the Ryzen 3 PRO 8300GE supports DDR5 memory. The EPYC 7643 uses DDR4 with an eight-channel memory bus.

Q: What is the core count difference?

A: The EPYC 7643 has 48 cores and 96 threads, while the Ryzen 3 PRO 8300GE has 4 cores and 8 threads, a 12x core advantage for the EPYC 7643.

Q: Which processor has a higher boost clock?

A: The Ryzen 3 PRO 8300GE has a higher boost clock at 4.90 GHz, compared to 3.60 GHz for the EPYC 7643. Despite this, the EPYC 7643 wins single-core benchmarks by over 400%.

Q: Are these processors comparable in power consumption?

A: No. The EPYC 7643 has a TDP of 225W, while the Ryzen 3 PRO 8300GE has a TDP of only 35W, making the desktop chip far more power-efficient.

Where Each One Wins

The EPYC 7643 wins in every benchmark category measured. It is the clear choice for multi-threaded server workloads, scientific computing, virtualization, and any task that can leverage 48 cores and 96 threads. Its 256 MB L3 cache and eight-channel DDR4 memory bandwidth of 204.8 GB/s make it suited for memory-intensive enterprise applications. The 128 PCIe Gen 4 lanes provide extensive I/O connectivity for storage arrays and network cards. The data shows it delivers over 400% more performance than the Ryzen 3 PRO 8300GE in all Cinebench tests, making it the definitive choice for raw compute.

The Ryzen 3 PRO 8300GE wins in scenarios where power efficiency, modern platform features, and integrated graphics matter. Its 35W TDP is a fraction of the EPYC 7643's 225W, making it suitable for compact desktop builds with limited cooling. The AM5 socket and DDR5 memory support provide a forward-looking platform. The integrated Radeon 740M graphics eliminate the need for a discrete GPU in basic desktop tasks. Its higher base and boost clocks (3.40 GHz and 4.90 GHz) suggest better responsiveness in lightly-threaded applications, though the benchmark data does not capture this advantage. The Ryzen 3 PRO 8300GE also has PassMark results in additional tests, though these are not directly comparable to the EPYC 7643. For a low-power desktop system with modern features, the Ryzen 3 PRO 8300GE is the appropriate selection.