AMD Ryzen 3 5400U vs Intel Xeon E5-2640 v3 Comparison

The AMD Ryzen 3 5400U and Intel Xeon E5-2640 v3 are separated by seven years, a 15-watt versus 90-watt thermal envelope, and a mobile versus server market segment. Yet the benchmark database places them at the same 50th percentile among all CPUs, and their average benchmark scores are nearly identical. The Ryzen 3 5400U posts an average score of 2765, while the Xeon E5-2640 v3 sits at 2703. That is a gap of roughly 2.3%, which is small enough that most workloads will feel indistinguishable. The head-to-head results confirm this: across six Cinebench tests, the AMD part wins all six, but the margins are razor-thin. In Cinebench R15 multicore, both score exactly 942. In R15 single-core, both score exactly 132. In R20 multicore, the AMD scores 3927 versus 3926, a difference of 0%. In R20 single-core, AMD leads 554 to 553, a 0.2% edge. In R23 multicore, AMD scores 9350 versus 9348, again 0%. In R23 single-core, AMD leads 1320 to 1319, a 0.1% margin. The data shows that for pure Cinebench throughput, these two processors are effectively tied, with the Ryzen 3 5400U holding a negligible lead in every discipline.

Head-to-Head Benchmarks

The most striking finding is that a 2021 quad-core mobile processor with a 15-watt TDP matches a 2014 eight-core server chip with a 90-watt TDP in multi-threaded rendering. The Ryzen 3 5400U delivers 942 points in Cinebench R15 multicore, exactly what the Xeon E5-2640 v3 delivers. In R20 multicore, the Ryzen scores 3927, the Xeon 3926. In R23 multicore, the Ryzen scores 9350, the Xeon 9348. These differences are within measurement noise. The Xeon has twice the cores and twice the threads, 8 cores and 16 threads versus 4 cores and 8 threads, but the Ryzen’s newer architecture and higher boost clock compensate completely. The Ryzen boosts to 4.00 GHz versus the Xeon’s 3.40 GHz, and it runs on a 7 nm TSMC process versus Intel’s 22 nm node. That process advantage allows the Ryzen to sustain higher clocks per watt, and the Zen 3 core design extracts more instructions per clock than the older Haswell core.

Single-core results tell the same story. The Ryzen 3 5400U scores 554 in R20 single-core against 553 for the Xeon. In R23 single-core, it scores 1320 against 1319. The Xeon’s lower boost clock and older architecture put it at a slight disadvantage, but the margin is under one percent. The Ryzen’s 4.00 GHz boost clock gives it the edge, but the Xeon’s 3.40 GHz is not far behind for a part from 2014. The database also includes Geekbench results for the Ryzen 3 5400U only: 4473 multicore and 1419 single-core. The Xeon has no Geekbench entry in the database, so no direct comparison is possible there. For Cinebench, the verdict is clear: these chips are peers, with the Ryzen winning every round by a hair.

Architecture Differences

The architectural gap is generational. The Ryzen 3 5400U uses Zen 3, codenamed Cezanne-U, built on a 7 nm process at TSMC. The Xeon E5-2640 v3 uses Haswell, codenamed Haswell-EP, built on Intel’s 22 nm process. The Ryzen integrates 10,700 million transistors on a 180 mm² die. The Xeon packs 2,600 million transistors on a 356 mm² die. That inversion is telling: the Ryzen crams four times as many transistors into half the silicon area, which explains how it matches an eight-core part with a fraction of the power. The Ryzen’s cache hierarchy is also different. It has 64 KB of L1 per core, 512 KB of L2 per core, and 8 MB of shared L3. The Xeon has 64 KB of L1 per core, 256 KB of L2 per core, and 20 MB of shared L3. The Xeon’s larger L3 helps its older cores, but the Ryzen’s faster L2 and lower latency Zen 3 design compensate.

Memory support differs significantly. Both support DDR4, but the Ryzen uses a dual-channel memory bus with 51.2 GB/s of bandwidth. The Xeon uses a quad-channel bus with 59.7 GB/s of bandwidth. The Xeon has 16% more memory bandwidth, which can matter in server workloads that stream large datasets. However, the Ryzen’s integrated memory controller is newer and likely has lower latency, though the database does not record latency figures. The Xeon also supports ECC memory, while the Ryzen does not. That makes the Xeon the only choice for error-correcting memory in reliability-sensitive environments. PCIe connectivity also favors the Xeon: it offers 40 Gen 3 lanes from the CPU, while the Ryzen offers only 8 Gen 3 lanes. The Xeon can drive multiple GPUs, NVMe drives, and high-speed networking. The Ryzen is limited to a single GPU or a few devices.

The Ryzen includes integrated graphics, a Radeon Vega 6 GPU. The Xeon has no integrated graphics, so it requires a discrete GPU for any display output. The Ryzen uses AMD Socket FP6, a mobile BGA package, while the Xeon uses Intel Socket 2011-3, a large server socket. The Ryzen’s TDP is 15 watts; the Xeon’s is 90 watts, a sixfold difference. The Ryzen is marked as Active in production, while the Xeon is End-of-life. The Ryzen launched on January 11, 2021, and the Xeon launched on September 7, 2014. The Xeon’s launch MSRP was $939, which can be stated once as a historical reference. The Ryzen has no launch MSRP recorded in the database.

FAQ

Q: Which processor is faster in multi-core Cinebench R23?

A: The AMD Ryzen 3 5400U scores 9350 in Cinebench R23 multicore, while the Intel Xeon E5-2640 v3 scores 9348. The Ryzen leads by 0%, meaning the difference is effectively zero.

Q: Does the Intel Xeon support ECC memory?

A: Yes, the Xeon E5-2640 v3 supports ECC memory. The AMD Ryzen 3 5400U does not, so the Xeon is the appropriate choice for systems that require error-correcting memory.

Q: Which chip has more PCIe lanes?

A: The Intel Xeon E5-2640 v3 provides 40 Gen 3 lanes from the CPU, while the AMD Ryzen 3 5400U provides 8 Gen 3 lanes. The Xeon can support more expansion cards and high-bandwidth devices.

Q: Does the Ryzen 3 5400U have integrated graphics?

A: Yes, it includes a Radeon Vega 6 integrated GPU. The Xeon E5-2640 v3 has no integrated graphics, so it requires a separate graphics card for display output.

Q: How do their power requirements compare?

A: The Ryzen 3 5400U has a 15-watt TDP, while the Xeon E5-2640 v3 has a 90-watt TDP. The Ryzen consumes far less power, which makes it suitable for laptops and compact systems.

Q: Which processor is still in production?

A: The AMD Ryzen 3 5400U is marked as Active in production. The Intel Xeon E5-2640 v3 is marked as End-of-life, meaning it is no longer manufactured.

The Verdict

The recorded data shows that for Cinebench workloads, there is no performance winner. The Ryzen 3 5400U wins all six head-to-head tests, but the largest margin is 0.2%, which is negligible. The choice between these two CPUs comes down to platform requirements, not raw speed. Pick the AMD Ryzen 3 5400U if you need a low-power, mobile-friendly part with integrated graphics, modern Zen 3 efficiency, and a 7 nm process. It delivers the same multi-threaded Cinebench scores as the Xeon while drawing one-sixth of the power. Pick the Intel Xeon E5-2640 v3 if you need ECC memory support, quad-channel DDR4 bandwidth, 40 PCIe lanes, or a server/ workstation socket. It also has a 20 MB shared L3 cache, which is larger than the Ryzen’s 8 MB, and it supports more memory channels. The Xeon is end-of-life and has a $939 launch MSRP, but its platform features are irreplaceable for certain use cases.

Specification Differences

The two processors differ in nearly every platform specification. The Ryzen 3 5400U has 4 cores and 8 threads; the Xeon has 8 cores and 16 threads. The Ryzen boosts to 4.00 GHz; the Xeon boosts to 3.40 GHz. Both have a 2.60 GHz base clock. The Ryzen’s TDP is 15 watts; the Xeon’s is 90 watts. The Ryzen uses AMD Socket FP6; the Xeon uses Intel Socket 2011-3. The Ryzen is built on TSMC’s 7 nm process; the Xeon uses Intel’s 22 nm process. The Ryzen has 10,700 million transistors on a 180 mm² die; the Xeon has 2,600 million transistors on a 356 mm² die. The Ryzen has 512 KB of L2 per core; the Xeon has 256 KB of L2 per core. The Ryzen has 8 MB of shared L3; the Xeon has 20 MB of shared L3. The Ryzen uses a dual-channel memory bus with 51.2 GB/s bandwidth; the Xeon uses a quad-channel bus with 59.7 GB/s bandwidth. The Ryzen does not support ECC memory; the Xeon does. The Ryzen has 8 PCIe Gen 3 lanes; the Xeon has 40 PCIe Gen 3 lanes. The Ryzen has integrated Radeon Vega 6 graphics; the Xeon has none. The Ryzen is a mobile part; the Xeon is a server/workstation part. The Ryzen is Active; the Xeon is End-of-life. The Ryzen launched in 2021; the Xeon launched in 2014.

Where Each One Wins

The AMD Ryzen 3 5400U wins in single-core performance, albeit narrowly, with a 0.1% to 0.2% lead in all Cinebench single-core tests. It wins decisively in power efficiency, operating at 15 watts versus 90 watts, and it wins in integrated graphics capability with the Radeon Vega 6. It also wins on process technology, using a 7 nm node versus 22 nm, and on transistor density, packing 10,700 million transistors versus 2,600 million. For mobile systems, ultra-compact desktops, or any build where power draw and heat output are critical, the Ryzen is the clear choice. Its smaller die size, 180 mm² versus 356 mm², also makes it easier to cool with a capable air cooler.

The Intel Xeon E5-2640 v3 wins in core count with 8 cores versus 4, and in thread count with 16 threads versus 8. It wins in L3 cache size, 20 MB versus 8 MB, which can benefit workloads with large working sets. It wins in memory bandwidth, 59.7 GB/s versus 51.2 GB/s, and in memory channel count, quad-channel versus dual-channel. It wins in PCIe lane count, 40 lanes versus 8 lanes, and it is the only one of the two that supports ECC memory. For server or workstation applications that need many PCIe devices, high memory throughput, or error-correcting RAM, the Xeon is the appropriate part, despite its end-of-life status and higher power draw. The database shows that in raw Cinebench throughput, the two are tied, so the decision rests entirely on these platform-level differences.