AMD EPYC 7313 vs AMD Ryzen 7 8745HX Comparison

Where Each One Wins

The benchmark data splits cleanly along core-count and clock-speed lines. The AMD EPYC 7313 wins 9 of the 11 recorded head-to-head comparisons, and every one of those victories comes in a multi-threaded or throughput-oriented workload. The AMD Ryzen 7 8745HX wins the remaining 2, both being single-thread tests, and by a commanding margin.

For workloads that scale with cores and memory bandwidth, the EPYC 7313 is the clear choice. Its 16 cores and 32 threads double the Ryzen's 8 cores and 16 threads, and that advantage shows up in every parallel test. The physics test is the most extreme example: the EPYC scores 3899 against the Ryzen's 1681, a 56.9% gap. Prime number finding shows a similar story, with the EPYC at 310 versus 159, a 48.7% lead. Data compression, integer math, and encryption all fall in the 30% range in favor of the EPYC.

The Ryzen 7 8745HX fights back in single-thread performance. Its 3879 score in the single-thread PassMark test crushes the EPYC's 2402 by 61.5%. That is the largest delta in either direction across the entire benchmark set. The Ryzen's 5.10 GHz boost clock versus the EPYC's 3.70 GHz explains this outcome, but the architecture difference also matters: Zen 4 on a 5 nm node versus Zen 3 on 7 nm.

The practical split is straightforward. If the workload is heavily parallel, server-style tasks like database compression, encryption, or physics simulation, the EPYC 7313 is the stronger part. If the workload is latency-sensitive or single-threaded, such as general desktop responsiveness or lightly threaded applications, the Ryzen 7 8745HX has the edge. Neither part dominates the other across all categories; the choice depends entirely on what the system will run.

Architecture Differences

The two processors come from different generations and target completely different market segments. The Ryzen 7 8745HX belongs to the 8000 series, uses Zen 4 architecture under the Dragon Range codename, and is built on a 5 nm process at TSMC. The EPYC 7313 belongs to the EPYC 7003 series, uses Zen 3 architecture under the Milan codename, and is built on a 7 nm process, also at TSMC.

The transistor counts reflect the scale difference. The Ryzen packs 6,570 million transistors on a 71 mm² die. The EPYC uses 16,600 million transistors spread across four 81 mm² dies, for a total of roughly 324 mm² of silicon. That is a massive physical difference, and it explains why the EPYC can offer double the cores and four times the L3 cache.

Cache configurations differ substantially. Both have 64 KB of L1 per core, but the L2 differs: the Ryzen has 1 MB per core while the EPYC has 512 KB per core. L3 cache is where the gap widens dramatically. The Ryzen has 32 MB shared, while the EPYC has 128 MB shared, four times as much. For workloads that repeatedly access large datasets, that extra L3 capacity on the EPYC reduces memory stalls and improves throughput.

Memory support also diverges. The Ryzen uses DDR5 with a dual-channel bus, delivering 83.2 GB/s of bandwidth. The EPYC uses DDR4 with an eight-channel bus, delivering 204.8 GB/s. The EPYC also supports ECC memory, while the Ryzen does not. The EPYC's PCIe implementation is more expansive: Gen 4 with 128 lanes, versus Gen 5 with 28 lanes on the Ryzen. The Ryzen does include integrated Radeon 610M graphics, while the EPYC has none.

Sockets and power envelopes separate the two further. The Ryzen uses AMD Socket FL1 with a 55 W TDP, typical for a mobile part. The EPYC uses AMD Socket SP3 with a 155 W TDP, typical for a server processor. The Ryzen has an unlocked multiplier; the EPYC is locked. Release dates also differ: the Ryzen launched in April 2025, the EPYC in March 2021.

Head-to-Head Benchmarks

The biggest win for the EPYC 7313 comes in the physics test, where it scores 3899 against the Ryzen's 1681. That is a 56.9% advantage, the largest gap in the entire comparison outside of single-thread results. Physics workloads typically stress floating-point throughput and cache behavior, and the EPYC's 128 MB L3 and 16 cores deliver there.

Prime number finding is the second-largest EPYC win. The EPYC scores 310, the Ryzen 159, a 48.7% lead. This test is highly parallel and benefits from raw core count. Data encryption shows a 31.5% gap in favor of the EPYC (31881 versus 21840), and data compression shows a 30.8% gap (525507 versus 363759). Integer math follows at 30.2% (143648 versus 100328). Random string sorting is closer, with the EPYC ahead by 23.2% (57910 versus 44494). Floating-point math shows a 21.3% edge for the EPYC (78748 versus 61972), and extended instructions come in at 17.3% (33430 versus 27638). The multithread score, which aggregates general parallel performance, gives the EPYC an 18.4% win (38644 versus 31517).

The Ryzen 7 8745HX's wins are both in single-thread tests, and they are decisive. The PassMark single-thread score shows 3879 for the Ryzen against 2402 for the EPYC, a 61.5% margin. The same score appears under the singlethread test name, confirming the result. This is a massive advantage for any workload that cannot use multiple cores, and it comes from the combination of a much higher boost clock and newer architecture.

Across all 11 tests, the EPYC wins 9 and the Ryzen wins 2. The average benchmark score tells a similar story: the Ryzen averages 60104, the EPYC 57399. The Ryzen actually has a higher average despite losing most head-to-head tests, because its single-thread win is so large that it drags the average up. The EPYC's multi-thread wins are consistent but mostly in the 20-30% range, while the Ryzen's single-thread win is over 60%.

Specification Differences

The two processors differ in nearly every fundamental specification. Core count: 8 versus 16. Threads: 16 versus 32. Base clock: 3.60 GHz versus 3.00 GHz. Boost clock: 5.10 GHz versus 3.70 GHz. TDP: 55 W versus 155 W. Process node: 5 nm versus 7 nm. Transistors: 6,570 million versus 16,600 million. Die size: 71 mm² versus 4x 81 mm².

Cache differences matter for server workloads. L2 is 1 MB per core on the Ryzen, 512 KB per core on the EPYC. L3 is 32 MB shared on the Ryzen, 128 MB shared on the EPYC. Memory support: DDR5 dual-channel versus DDR4 eight-channel. Memory bandwidth: 83.2 GB/s versus 204.8 GB/s. ECC: not supported versus supported. PCIe: Gen 5 with 28 lanes versus Gen 4 with 128 lanes. Integrated graphics: Radeon 610M versus none. Socket: AMD Socket FL1 versus AMD Socket SP3. Multiplier: unlocked versus locked. Release date: April 2025 versus March 2021. Launch MSRP for the EPYC is $1083; the Ryzen has no recorded launch MSRP.

FAQ

Q: Which processor has better single-thread performance?

A: The AMD Ryzen 7 8745HX wins decisively, scoring 3879 in the PassMark single-thread test compared to the EPYC 7313's 2402, a 61.5% advantage.

Q: Which processor is better for multi-threaded workloads?

A: The AMD EPYC 7313 wins 9 of 11 head-to-head benchmarks, including multithread (38644 versus 31517, an 18.4% lead), data compression (525507 versus 363759, a 30.8% lead), and physics (3899 versus 1681, a 56.9% lead).

Q: Why does the EPYC 7313 have so much more L3 cache?

A: The EPYC 7313 has 128 MB shared L3 cache, while the Ryzen 7 8745HX has 32 MB. This difference comes from the EPYC's server design, which uses four 81 mm² dies totaling 16,600 million transistors versus the Ryzen's single 71 mm² die with 6,570 million transistors.

Q: Does the Ryzen 7 8745HX support ECC memory?

A: No, the Ryzen 7 8745HX does not support ECC memory. The EPYC 7313 does support ECC, and it also offers higher memory bandwidth at 204.8 GB/s versus 83.2 GB/s.

Q: Which processor has a higher boost clock?

A: The Ryzen 7 8745HX boosts to 5.10 GHz, while the EPYC 7313 boosts to 3.70 GHz. The Ryzen also has a higher base clock at 3.60 GHz versus 3.00 GHz.

Q: How many PCIe lanes does each processor provide?

A: The Ryzen 7 8745HX provides 28 Gen 5 lanes, while the EPYC 7313 provides 128 Gen 4 lanes. The EPYC offers far more total lanes, but the Ryzen uses a newer PCIe generation.

The Verdict

The data points to a clear use-case split. The AMD EPYC 7313 is the right choice for server or workstation deployments where parallel throughput dominates. Its 16 cores, 32 threads, 128 MB L3 cache, and 204.8 GB/s memory bandwidth deliver consistent 20-50% wins over the Ryzen in every multi-threaded benchmark category. The physics test shows the largest gap at 56.9%, and even the closest multi-thread win, extended instructions at 17.3%, is substantial. For database work, encryption, compression, or any workload that scales across cores, the EPYC 7313 is the stronger part.

The AMD Ryzen 7 8745HX is the choice for single-thread-sensitive applications. Its 61.5% margin in single-thread performance is the largest delta recorded in either direction, and its 5.10 GHz boost clock gives it an advantage that no core count can overcome. For a mobile system where power matters, the 55 W TDP versus 155 W is a massive difference, and the integrated Radeon 610M means no separate GPU is required. The unlocked multiplier also allows tuning, though the EPYC's locked multiplier does not.

The average benchmark scores complicate the picture slightly. The Ryzen averages 60104, the EPYC 57399, so the Ryzen has a higher overall average despite losing 9 of 11 tests. This happens because the single-thread win is so large that it lifts the average. The percentile ranking is identical at 92 for both, meaning they sit in the same tier relative to all CPUs in the database. The nearest rivals confirm the positioning: the Ryzen trades blows with the Ryzen 9 7945HX (0% delta) and Intel Core i9-14900F (0.2% delta), while the EPYC sits near the Ryzen 9 9900X (-0.2% delta) and EPYC 9015 (-0.3% delta).

For a builder prioritizing raw multi-core throughput in a rack server, the EPYC 7313 is the obvious pick. For a compact or mobile system where single-thread speed and low power matter, the Ryzen 7 8745HX is the answer. Neither part is a general-purpose winner; the selection depends entirely on the workload mix. The recorded data shows no scenario where both requirements are met by a single processor.