AMD EPYC 7643 vs AMD Ryzen 5 2600E Comparison

Where Each One Wins

The benchmark data splits cleanly along a single axis: the AMD EPYC 7643 wins every recorded comparison. Across all six Cinebench tests, the EPYC 7643 takes 6 wins, while the Ryzen 5 2600E records 0 wins. This is not a close contest by any measurement; the deltas are consistently above 516% in favor of the EPYC.

For multi-threaded workloads, the EPYC 7643 is the clear choice. Its Cinebench R23 multi-core score of 64642 dwarfs the Ryzen 5 2600E’s 10494, a 516% advantage. The R20 multi-core result follows the same pattern: 27149 versus 4407, again a 516% gap. The R15 multi-core test shows 6515 versus 1057, a 516.4% difference. These figures indicate that any workload that scales with core count, such as rendering, compilation, or scientific simulation, will overwhelmingly favor the EPYC part.

Single-threaded performance also favors the EPYC 7643, though the relative gap is similar in percentage terms because the Ryzen 5 2600E’s single-core scores are extremely low. In Cinebench R23 single-core, the EPYC scores 9126 versus 1481 for the Ryzen, a 516.2% delta. R20 single-core shows 3832 versus 622, a 516.1% delta, and R15 single-core shows 919 versus 149, a 516.8% delta. The EPYC’s boost clock of 3.60 GHz is lower than the Ryzen’s 4.00 GHz, yet the architectural efficiency of Zen 3 over the older Zen design more than compensates, as the recorded data shows.

The Ryzen 5 2600E does have a set of Passmark benchmarks not recorded for the EPYC, including data compression (173653), data encryption (12146), extended instructions (6509), find prime numbers (32), floating point math (20970), integer math (39781), multithread (12346), physics (752), random string sorting (20918), and single thread (2297). These numbers are not directly comparable to the EPYC because the EPYC lacks entries for those tests in the database. However, the Ryzen’s average benchmark score of 18230 places it at the 72nd percentile among all CPUs, while the EPYC’s average of 18697 places it at the 73rd percentile. The percentile rankings are close, but the EPYC’s average is higher by 467 points.

In practical terms, the EPYC 7643 is built for server and workstation environments where core density and memory bandwidth matter most. The Ryzen 5 2600E is a desktop part with a lower core count and a higher boost clock, but the recorded Cinebench results show it cannot match the EPYC in any tested scenario. The database indicates no workload category where the Ryzen wins.

Architecture Differences

The two processors come from different generations and target different market segments. The EPYC 7643 uses the Zen 3 architecture under the codename Milan, built on a 7 nm process at TSMC. It belongs to the EPYC 7003 series and is classified as a Server/Workstation part. The Ryzen 5 2600E uses the original Zen architecture, specifically Zen+ (Pinnacle Ridge), built on a 12 nm process at GlobalFoundries. It is a Desktop part in the 2000 series.

The core counts differ massively. The EPYC has 48 cores and 96 threads, while the Ryzen has 6 cores and 12 threads. This 8x core advantage explains the multi-threaded benchmark gap. The EPYC’s base clock is 2.30 GHz with a boost of 3.60 GHz; the Ryzen’s base is 3.10 GHz with a boost of 4.00 GHz. The Ryzen has a higher clock speed, but the EPYC’s newer architecture and core count dominate.

Cache hierarchy is another major divergence. The EPYC provides 64 KB of L1 per core, 512 KB of L2 per core, and a massive 256 MB of shared L3 cache. The Ryzen offers 96 KB of L1 per core, 512 KB of L2 per core, but only 16 MB of shared L3. The EPYC’s L3 cache is 16 times larger, which is critical for data-heavy server workloads.

Process node differences are stark: 7 nm versus 12 nm. The EPYC integrates 33,200 million transistors across 8 dies, each 81 mm², while the Ryzen integrates 4,800 million transistors on a single 192 mm² die. The EPYC’s multi-die design supports eight-channel memory, while the Ryzen uses dual-channel memory. The EPYC’s memory bandwidth is recorded at 204.8 GB/s; the Ryzen’s memory bandwidth field is null in the database.

Socket and platform differ as well. The EPYC uses AMD Socket SP3, while the Ryzen uses AMD Socket AM4. The EPYC supports PCIe Gen 4 with 128 lanes from the CPU; the Ryzen’s PCIe field is null. ECC memory is supported on the EPYC but not on the Ryzen. Neither part has integrated graphics.

The EPYC’s launch MSRP is $4995, stated once here. The Ryzen has no launch MSRP in the database. Both processors have locked multipliers. The EPYC’s production status is Active, as is the Ryzen’s.

Head-to-Head Benchmarks

The head-to-head results are uniform: the EPYC 7643 wins every single recorded comparison, and the deltas are nearly identical across all tests, hovering around 516%.

In Cinebench R15 multi-core, the EPYC scores 6515 against the Ryzen’s 1057, a 516.4% advantage. The single-core R15 test shows 919 versus 149, a 516.8% delta. These are the largest percentage gaps in the entire dataset.

Cinebench R20 multi-core gives the EPYC 27149 versus 4407, a 516% delta. R20 single-core shows 3832 versus 622, a 516.1% delta. The R23 multi-core test records 64642 versus 10494, again a 516% delta. R23 single-core shows 9126 versus 1481, a 516.2% delta.

The consistency of the delta percentages, all between 516% and 516.8%, suggests that the performance advantage scales nearly perfectly with the core count and architectural improvements. The EPYC has 8 times the cores, and the multi-core scores are roughly 6.2 times higher, which indicates that the EPYC’s per-core efficiency in multi-threaded workloads is also superior, not just its core count.

For single-threaded tests, the EPYC’s advantage is surprising given its lower boost clock. The EPYC’s Zen 3 architecture delivers significantly higher instructions per clock than the older Zen design. The Ryzen’s single-core scores are notably low: 149 in R15, 622 in R20, and 1481 in R23. These figures place the Ryzen well below modern desktop processors, while the EPYC’s single-core scores are competitive with high-end desktop parts.

The database’s nearest rivals for the EPYC include the Intel Core i5-12400 (avg score 18683, delta 0.1%), Intel Core i7-1355U (18730, delta -0.2%), AMD Ryzen AI 5 330 (18811, delta -0.6%), and Intel Core i3-14100F (18519, delta 1%). These rivals are all much lower-core-count parts, yet their average scores are close to the EPYC’s 18697, indicating that the EPYC’s average benchmark score is dragged down by its relatively lower single-thread performance compared to its multi-thread dominance.

The Ryzen 5 2600E’s nearest rivals include the Intel Core i7-8700 (18223, delta 0%), AMD EPYC 9274F (18189, delta 0.2%), Intel Core 5 315 (18188, delta 0.2%), and Intel Core i7-9700 (18180, delta 0.3%). These rivals all have similar average scores, showing that the Ryzen sits in a dense cluster of mid-range processors.

Specification Differences

The following fields differ between the two parts:

• Cores: 48 versus 6
• Threads: 96 versus 12
• Base clock: 2.30 GHz versus 3.10 GHz
• Boost clock: 3.60 GHz versus 4.00 GHz
• TDP: 225 W versus 65 W
• Socket: AMD Socket SP3 versus AMD Socket AM4
• Architecture: Zen 3 versus Zen
• Codename: Milan versus Zen
• Generation: EPYC (Zen 3 (Milan)) versus Ryzen 5 (Zen+ (Pinnacle Ridge))
• Process node: 7 nm versus 12 nm
• Foundry: TSMC versus GlobalFoundries
• Transistors: 33,200 million versus 4,800 million
• Die size: 8x 81 mm² versus 192 mm²
• L1 cache: 64 KB per core versus 96 KB per core
• L3 cache: 256 MB shared versus 16 MB shared
• Memory bus: Eight-channel versus Dual-channel
• Memory bandwidth: 204.8 GB/s versus null
• ECC memory: true versus false
• PCIe: Gen 4, 128 lanes (CPU only) versus null
• Market segment: Server/Workstation versus Desktop
• Launch MSRP: $4995 versus null
• Part number: 100-000000326100-100000326WOF versus null

The L2 cache is identical at 512 KB per core. Both support DDR4 memory. Neither has integrated graphics. Both have locked multipliers and are marked Active in production status.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 7643 has 48 cores and 96 threads, while the AMD Ryzen 5 2600E has 6 cores and 12 threads.

Q: How much faster is the EPYC 7643 in multi-core Cinebench R23?

A: The EPYC scores 64642 versus 10494 for the Ryzen, a 516% advantage.

Q: Does the Ryzen 5 2600E win any benchmark in the database?

A: No, the recorded data shows the EPYC 7643 wins all 6 head-to-head Cinebench tests. The Ryzen has 0 wins.

Q: What is the memory configuration difference?

A: The EPYC supports eight-channel DDR4 with a memory bandwidth of 204.8 GB/s, while the Ryzen supports dual-channel DDR4 with no recorded bandwidth figure.

Q: Which part has a higher boost clock?

A: The Ryzen 5 2600E has a higher boost clock at 4.00 GHz, compared to the EPYC’s 3.60 GHz, but the EPYC still wins all single-threaded benchmarks.

Q: What is the process node difference?

A: The EPYC is built on a 7 nm process at TSMC, while the Ryzen uses a 12 nm process at GlobalFoundries.