AMD Ryzen 7 5825C vs Intel Xeon E5-1681 v3 Comparison

The Intel Xeon E5-1681 v3 and the AMD Ryzen 7 5825C occupy very different corners of the processor market, yet their benchmark scores land remarkably close together. The Xeon is a server and workstation part built on an older 22 nm process, while the Ryzen is a modern mobile chip built for low power consumption. Across six Cinebench tests, the Intel part wins every single round, but the margins are consistently narrow, ranging from 1.8 percent to 2.3 percent. Neither processor escapes the middle of the pack: both sit at the 55th percentile in the database, and their average benchmark scores differ by only 64 points (3643 for Intel versus 3579 for AMD). This is a matchup of architecture generations, power envelopes, and design philosophies that somehow converge on nearly identical rendering performance.

Head-to-Head Benchmarks

The recorded data shows a clean sweep for the Intel Xeon E5-1681 v3, but the victory is narrow in every discipline. In Cinebench R15 multicore, the Xeon scores 1269 against the Ryzen's 1247, a 1.8 percent advantage. The single-core R15 test shows the largest gap of the entire comparison: 179 versus 175, a 2.3 percent lead for Intel. Moving to Cinebench R20, the multicore result is 5290 for the Xeon and 5197 for the Ryzen, again a 1.8 percent margin, with the single-core result at 746 versus 733, also 1.8 percent. Cinebench R23 repeats the pattern: multicore 12597 versus 12376 (1.8 percent) and single-core 1778 versus 1747 (1.8 percent).

The consistency of these deltas is striking. Five of the six tests produce exactly a 1.8 percent difference, which suggests the two chips scale almost identically across workloads that stress one core or all cores. The only outlier is R15 single-core, where Intel stretches its lead to 2.3 percent. In absolute terms, the scores are close enough that most users would not notice the difference in everyday rendering tasks. The Xeon does win all six recorded comparisons, so its advantage, while narrow, is real and reproducible across multiple Cinebench versions.

Context from the nearest rivals reinforces how closely matched these two parts are. The Xeon's average benchmark score of 3643 places it 0.2 percent behind the Intel Core i9-10885H (3651), 0.4 percent behind the Intel Xeon E5-2658A v3 (3658), 0.7 percent behind the Intel Core i3-13100E (3668), and 0.8 percent behind the AMD EPYC 7251 (3671). The Ryzen's average of 3579 sits 0.1 percent ahead of the Intel Core i9-9980HK (3577), but 0.7 percent behind the AMD Ryzen 7 2700E (3603), 0.8 percent behind the Intel Xeon E5-2678 v3 (3608), and 0.9 percent behind the Intel Xeon E-2286G (3610). Both processors are clustered with a mix of older high-end mobile chips, entry-level desktop parts, and server Xeons, which speaks to how much the mid-range has shifted over time.

FAQ

Q: Which processor wins more benchmark tests?

A: The Intel Xeon E5-1681 v3 wins all six head-to-head Cinebench tests. The AMD Ryzen 7 5825C does not win any of the recorded comparisons.

Q: How large is the performance gap between the two?

A: The largest margin is 2.3 percent, which occurs in Cinebench R15 single-core (179 versus 175). The other five tests all show a 1.8 percent advantage for the Xeon.

Q: Do the two processors have the same average benchmark score?

A: No. The Xeon has an average benchmark score of 3643, while the Ryzen has an average of 3579. That is a difference of 64 points in favor of the Xeon.

Q: What is the TDP of each processor?

A: The Intel Xeon E5-1681 v3 has a TDP of 135 watts, while the AMD Ryzen 7 5825C has a TDP of 15 watts. The Ryzen uses 120 watts less, which is a major difference in power draw.

Q: How do their single-core scores compare in the latest Cinebench version?

A: In Cinebench R23 single-core, the Xeon scores 1778 and the Ryzen scores 1747, putting the Xeon ahead by 1.8 percent.

Q: Which processor has more cores?

A: The Xeon has 10 cores and 20 threads, while the Ryzen has 8 cores and 16 threads. The Xeon has two more cores and four more threads.

Architecture Differences

The two chips come from completely different architectural lineages. The Intel Xeon E5-1681 v3 is built on the Haswell architecture, specifically the Haswell-EP variant, and uses a 22 nm process node manufactured by Intel. The AMD Ryzen 7 5825C is built on Zen 3, specifically the Cezanne-U variant, and uses a 7 nm process node manufactured by TSMC. The process gap is enormous: 22 nm versus 7 nm represents multiple generations of manufacturing technology, which helps explain why the Ryzen achieves comparable performance at a fraction of the power.

Transistor counts tell a similar story. The Xeon packs 2,600 million transistors on a 356 mm² die, while the Ryzen packs 10,700 million transistors on a much smaller 180 mm² die. The Ryzen crams over four times as many transistors into roughly half the silicon area, a direct consequence of the denser 7 nm process. This density advantage allows AMD to deliver 8 cores with a 4.50 GHz boost clock while staying within a 15 watt TDP, whereas Intel needs 135 watts to reach a 3.50 GHz boost with its 10-core design.

Cache hierarchies also differ. Both chips have 64 KB of L1 cache per core. The Xeon has 256 KB of L2 cache per core, while the Ryzen doubles that to 512 KB per core. At the L3 level, the Xeon offers 25 MB of shared cache, while the Ryzen provides 16 MB. The Xeon's larger L3 pool likely helps its older architecture compensate for the per-core L2 deficit, but the Ryzen's larger L2 cache is better suited for its higher clock speeds.

Memory architecture is another major divider. The Xeon supports quad-channel DDR4 with a theoretical bandwidth of 68.3 GB/s, while the Ryzen uses dual-channel DDR4 with 51.2 GB/s. The Xeon also supports ECC memory, a feature absent from the Ryzen. For PCIe, the Xeon provides 40 CPU-only lanes of Gen 3, while the Ryzen provides only 8 lanes of Gen 3. The Ryzen does include integrated Radeon Vega 8 graphics, while the Xeon has no integrated graphics at all.

Production status and release timing set the two apart further. The Xeon was released on September 7, 2014, and is now end-of-life. The Ryzen was released on May 4, 2022, and remains active. That is nearly an eight-year gap between release dates, which makes the benchmark parity even more striking: a modern low-power mobile chip matches a legacy server processor from a much earlier era.

Specification Differences

The core counts differ: the Xeon has 10 cores and 20 threads, while the Ryzen has 8 cores and 16 threads. Clock speeds also diverge significantly. The Xeon has a base clock of 2.90 GHz and a boost clock of 3.50 GHz. The Ryzen has a base clock of 2000.00 MHz and a boost clock of 4.50 GHz. The Ryzen's base clock is far lower, but its boost clock is a full 1.00 GHz higher, which explains how it keeps pace despite having fewer cores.

Power consumption is the most dramatic difference. The Xeon has a TDP of 135 watts, and the Ryzen has a TDP of 15 watts. That is a 120 watt gap, a factor of nine in rated power draw. The socket types are completely incompatible: the Xeon uses Intel Socket 2011-3, while the Ryzen uses AMD Socket FP6. The market segments also differ, with the Xeon aimed at Server and Workstation use and the Ryzen aimed at Mobile.

Memory channels split the two: the Xeon runs quad-channel DDR4 with 68.3 GB/s of bandwidth, while the Ryzen runs dual-channel DDR4 with 51.2 GB/s. ECC support is present on the Xeon but not on the Ryzen. PCIe lanes differ as well, with the Xeon offering 40 Gen 3 lanes and the Ryzen offering only 8. The Ryzen includes integrated Radeon Vega 8 graphics, while the Xeon has no integrated graphics. The process node and foundry differ: 22 nm at Intel for the Xeon, 7 nm at TSMC for the Ryzen. Transistor count and die size also differ, with the Xeon at 2,600 million transistors on 356 mm² and the Ryzen at 10,700 million on 180 mm². L2 cache per core is 256 KB for the Xeon and 512 KB for the Ryzen, while L3 cache is 25 MB shared for the Xeon and 16 MB shared for the Ryzen. Neither processor has an unlocked multiplier, and neither has a recorded launch MSRP.

The Verdict

The data points to a clear but narrow winner in raw performance: the Intel Xeon E5-1681 v3 wins all six Cinebench tests and holds a 64-point advantage in average benchmark score. Anyone who prioritizes pure rendering throughput, even by a small margin, would choose the Xeon based on these measurements. The Xeon also offers more cores, more threads, more PCIe lanes, quad-channel memory, and ECC support, making it the more capable platform for server and workstation workloads.

The AMD Ryzen 7 5825C loses every benchmark but does so while consuming 120 fewer watts. Its 15 watt TDP makes it suitable for mobile and low-power environments where the Xeon's 135 watt envelope would be impractical. The Ryzen also has a much higher boost clock at 4.50 GHz versus 3.50 GHz, integrated Radeon Vega 8 graphics, and a modern 7 nm process. For a laptop or compact system, the Ryzen is the only realistic option of the two.

Both processors sit at the 55th percentile in the database, and their nearest rivals are a mix of mobile, desktop, and server chips. The Xeon's rivals include the Intel Core i9-10885H, Intel Xeon E5-2658A v3, Intel Core i3-13100E, and AMD EPYC 7251, all within 0.8 percent of its average score. The Ryzen's rivals include the Intel Core i9-9980HK, AMD Ryzen 7 2700E, Intel Xeon E5-2678 v3, and Intel Xeon E-2286G, all within 0.9 percent. This clustering shows that neither chip is an outlier; both are solidly mid-pack performers.

Where Each One Wins

The Intel Xeon E5-1681 v3 wins in every recorded benchmark, so its case is straightforward for performance. It leads by 1.8 percent in Cinebench R15 multicore, R20 multicore, R20 single-core, R23 multicore, and R23 single-core, and by 2.3 percent in R15 single-core. It also wins on platform features: 10 cores versus 8, 20 threads versus 16, quad-channel memory versus dual-channel, 68.3 GB/s versus 51.2 GB/s memory bandwidth, ECC support, 40 PCIe lanes versus 8, and 25 MB of L3 cache versus 16 MB. For server racks, workstations, or any system where power draw is not a constraint, the Xeon is the better choice.

The AMD Ryzen 7 5825C wins on efficiency and modern traits. Its 15 watt TDP is a fraction of the Xeon's 135 watts, which opens up use cases in laptops, thin clients, and other power-constrained designs. Its 4.50 GHz boost clock is 1.00 GHz higher than the Xeon's 3.50 GHz, and its 7 nm TSMC process is far denser, with 10,700 million transistors on 180 mm² compared to 2,600 million on 356 mm². The Ryzen also includes integrated Radeon Vega 8 graphics, meaning a system built around it does not need a separate GPU for basic display output. Its 512 KB L2 cache per core doubles the Xeon's 256 KB.

In practical terms, the Xeon wins wherever performance and expandability matter more than power, and the Ryzen wins wherever power, size, and integration matter more than the last few percent of Cinebench score. The benchmark results are close enough that the decision should hinge on the surrounding platform, not the raw numbers. The Xeon's end-of-life status and the Ryzen's active production status also factor into long-term planning, since the Ryzen remains a current product while the Xeon has been discontinued.