AMD Ryzen 7 PRO 5850U vs Intel Xeon E5-1660 v3 Comparison

AMD Ryzen 7 PRO 5850U vs Intel Xeon E5-1660 v3 is a matchup of two very different eras in computing: a modern 15-watt mobile processor from 2021 facing off against a 140-watt server/workstation chip from 2014. The recorded data shows a fascinating split, where each processor dominates in distinct benchmark scenarios, making the choice heavily dependent on the specific workload.

Head-to-Head Benchmarks

The head-to-head results are starkly divided by workload type. In Cinebench R15, the AMD Ryzen 7 PRO 5850U scores 1467 points in the multicore test, which is 36.6% ahead of the Intel Xeon E5-1660 v3's 1074 points. The single-core gap is even more pronounced: the Ryzen scores 227 points versus the Xeon's 151, a 50.3% advantage for AMD. This is a massive generational leap in per-thread performance.

However, the story reverses in the newer Cinebench R23 benchmark. Here, the Intel Xeon E5-1660 v3 takes the lead with a multicore score of 10656, beating the Ryzen's 8716 by 18.2%. The Xeon also wins the R23 single-core test, scoring 1504 against AMD's 1405, a 6.6% margin. This flip-flop is curious, as it suggests the Xeon scales better in the longer, more demanding R23 workload, while the Ryzen dominates the shorter R15 test. The average benchmark scores reflect this overall balance: the Ryzen has an average score of 3159, with the Xeon close behind at 3082. Each processor claims two wins in the head-to-head comparison.

Architecture Differences

The fundamental differences between these two chips explain the benchmark results. The AMD Ryzen 7 PRO 5850U uses the Zen 3 architecture on a 7 nm process node from TSMC, with 10,700 million transistors on a 180 mm² die. In contrast, the Intel Xeon E5-1660 v3 is built on the older Haswell architecture, using Intel's 22 nm process, with 2,600 million transistors on a much larger 356 mm² die. This explains the Ryzen's efficiency and high clock speeds.

The Ryzen has a base clock of 1900 MHz and boosts to 4.40 GHz, while the Xeon has a higher base clock of 3.00 GHz but only boosts to 3.50 GHz. The Ryzen's ability to boost much higher is a direct result of the newer process node. Cache configurations also differ: both have 64 KB of L1 per core, but the Ryzen has 512 KB of L2 per core versus the Xeon's 256 KB, and the Ryzen has 16 MB of shared L3, while the Xeon has 20 MB. The Xeon's larger L3 cache is a point in its favor for some workloads.

Memory support is another major divider. Both support DDR4, but the Ryzen uses a dual-channel bus with 51.2 GB/s of bandwidth, while the Xeon uses a quad-channel bus with 68.3 GB/s. The Xeon also supports ECC memory, which the Ryzen does not. PCIe connectivity is also different: the Ryzen offers Gen 3 with 8 CPU lanes, while the Xeon offers Gen 3 with 40 CPU lanes. The Ryzen includes integrated Radeon Vega 8 graphics, while the Xeon has no integrated graphics at all. The Ryzen is classified as a mobile part on the AMD Socket FP6, while the Xeon is a server/workstation part on Intel Socket 2011-3, with its multiplier unlocked.

Where Each One Wins

The data clearly shows where each processor is best suited. The AMD Ryzen 7 PRO 5850U is the clear winner for tasks that rely on quick, responsive single-threaded performance and short bursts of activity. Its 50.3% lead in Cinebench R15 single-core and 36.6% lead in R15 multicore highlight its strength in legacy applications and general desktop responsiveness. The Ryzen also holds a significant advantage in raw efficiency, given its 15-watt TDP, making it ideal for thin-and-light laptops where battery life and low heat are critical. Its integrated graphics also make it a self-contained solution for basic display output.

The Intel Xeon E5-1660 v3, on the other hand, wins in sustained, multi-threaded workloads as represented by Cinebench R23. Its 18.2% multicore lead suggests it can maintain high performance over longer periods, likely due to its higher base clock and larger 20 MB L3 cache. Its quad-channel memory with higher bandwidth (68.3 GB/s) and support for ECC memory make it a better fit for server or workstation environments where data integrity and high memory throughput are paramount. The 40 PCIe lanes are also a major advantage for expansion cards, such as multiple GPUs or specialized accelerators. The Xeon is a platform choice for heavy, professional workloads, not a mobile chip.

FAQ

Q: Which processor has better single-core performance in Cinebench R15?

A: The AMD Ryzen 7 PRO 5850U, with a score of 227 compared to the Intel Xeon E5-1660 v3's 151, a 50.3% advantage.

Q: Which processor wins in Cinebench R23 multicore?

A: The Intel Xeon E5-1660 v3 wins with a score of 10656, beating the AMD Ryzen 7 PRO 5850U's 8716 by 18.2%.

Q: Does the Intel Xeon support ECC memory?

A: Yes, the Intel Xeon E5-1660 v3 supports ECC memory, while the AMD Ryzen 7 PRO 5850U does not.

Q: What is the difference in memory bandwidth between the two?

A: The Intel Xeon E5-1660 v3 has a quad-channel memory bus with 68.3 GB/s of bandwidth, while the AMD Ryzen 7 PRO 5850U has a dual-channel bus with 51.2 GB/s.

Q: Do both processors have integrated graphics?

A: No. The AMD Ryzen 7 PRO 5850U has integrated Radeon Vega 8 graphics, while the Intel Xeon E5-1660 v3 has no integrated graphics.

Q: Which processor has a higher boost clock?

A: The AMD Ryzen 7 PRO 5850U boosts to 4.40 GHz, while the Intel Xeon E5-1660 v3 boosts to 3.50 GHz.

Specification Differences

The two processors differ in nearly every major specification category. The AMD Ryzen 7 PRO 5850U uses the Zen 3 architecture on a 7 nm process from TSMC, while the Intel Xeon E5-1660 v3 uses Haswell on Intel's 22 nm process. The Ryzen has a base clock of 1900 MHz and a boost clock of 4.40 GHz, whereas the Xeon has a base clock of 3.00 GHz and a boost of 3.50 GHz. The Ryzen has a TDP of 15 watts, while the Xeon has a TDP of 140 watts.

Cache sizes differ as well: the Ryzen has 512 KB of L2 per core and 16 MB of shared L3, while the Xeon has 256 KB of L2 per core and 20 MB of shared L3. The Ryzen supports dual-channel memory with 51.2 GB/s bandwidth and no ECC, while the Xeon supports quad-channel memory with 68.3 GB/s and ECC. PCIe connectivity is drastically different: 8 lanes on the Ryzen versus 40 lanes on the Xeon. The Ryzen includes integrated Radeon Vega 8 graphics; the Xeon has none. The Ryzen is a mobile part on Socket FP6, while the Xeon is a server/workstation part on Socket 2011-3. The Xeon has an unlocked multiplier, while the Ryzen does not. The Xeon is end-of-life, while the Ryzen is still active.

The Verdict

The choice between these two processors is dictated entirely by the use case. For a mobile user who needs a responsive, efficient processor for everyday tasks, light productivity, and portability, the AMD Ryzen 7 PRO 5850U is the clear pick. Its massive leads in Cinebench R15, both single and multicore, demonstrate its superiority in short-burst workloads and older applications. Its 15-watt TDP is a fundamental advantage for laptop designs.

For a professional building a workstation or server, the Intel Xeon E5-1660 v3 is the justified choice, provided the platform power and size are acceptable. Its victory in Cinebench R23 multicore shows sustained multi-threaded capability, and its support for ECC memory, quad-channel bandwidth, and 40 PCIe lanes are features the Ryzen simply cannot offer. The data does not support labeling one as universally better; it supports the notion that each is the correct tool for a different job. The Ryzen is for efficiency and responsiveness, the Xeon for heavy, reliable, multi-threaded processing.