Intel Atom x7405C vs Intel Xeon D-2775TE Comparison

The Verdict

The Intel Xeon D-2775TE and Intel Atom x7405C occupy entirely different corners of the Intel lineup, and the benchmark data makes that separation obvious. The Xeon D-2775TE wins all six head-to-head benchmark comparisons, with every victory coming by a margin of at least 423.2%. This is not a close contest by any measure, and the recorded data shows the Xeon D-2775TE delivering between 5.2x and 5.3x the performance of the Atom x7405C across Cinebench R15, R20, and R23 workloads. The Xeon D-2775TE is the clear choice for any workload that demands heavy multi-core throughput, server-style memory bandwidth, or ECC reliability, as it offers 16 cores with 32 threads, quad-channel DDR4 memory, and 25 MB of shared L3 cache.

The Intel Atom x7405C, by contrast, serves a completely different purpose. Its 4 cores and 4 threads with a 12 W TDP make it a low-power option for mobile or embedded scenarios where the Xeon's 100 W TDP would be impractical. Its single-channel memory bus and lack of ECC support further position it as a lightweight part. The data shows the Atom x7405C still reaches the 62nd percentile among all CPUs, identical to the Xeon D-2775TE, which indicates that its modest performance profile is competitive within its own weight class. However, anyone needing serious compute density should select the Xeon D-2775TE without hesitation, while the Atom x7405C is best suited for power-constrained designs where raw performance takes a back seat.

Architecture Differences

The architectural gap between these two processors is substantial, starting with their underlying designs. The Intel Xeon D-2775TE uses the Ice Lake architecture with the Ice Lake-D codename, built on Intel's 10 nm process. It integrates 16 cores and 32 threads, a configuration that leverages simultaneous multithreading to double the available thread count. Its cache hierarchy includes 80 KB of L1 per core, 1.25 MB of L2 per core, and a shared 25 MB L3 pool. Memory support is limited to DDR4 but runs over a quad-channel bus, yielding a memory bandwidth of 93.9 GB/s. The platform also supports ECC memory, a critical feature for server and workstation reliability, and provides PCIe Gen 4 with 32 lanes from the CPU. Its socket is Intel BGA 2579, and it falls into the Server/Workstation market segment.

The Intel Atom x7405C takes a fundamentally different approach. It uses the Amston Lake architecture with the Gracemont core generation, also fabricated on Intel's 10 nm process. The chip has 4 cores and 4 threads, with no multithreading support, meaning each core handles a single thread. Its L1 cache is 96 KB per core, L2 is 2 MB shared, and L3 is 6 MB shared. Memory support expands to both DDR4 and DDR5, but the bus is single-channel, capping memory bandwidth at 38.4 GB/s. ECC memory is not supported, and PCIe connectivity drops to Gen 3 with 9 lanes from the CPU. The socket is Intel BGA 1264, and the market segment is Mobile, reflecting its low-power design philosophy. The integrated graphics field is listed as N/A for the Atom, while the Xeon lists no integrated graphics at all.

The launch dates also differ: the Xeon D-2775TE arrived on 2022-02-23, while the Atom x7405C launched on 2024-04-07. Both parts are currently marked as Active in production status, and neither has an unlocked multiplier.

Head-to-Head Benchmarks

The Cinebench suite paints a stark picture of the performance disparity. In Cinebench R15 multicore, the Xeon D-2775TE scores 2338 against the Atom x7405C's 446, a delta of 424.2% in favor of the Xeon. The single-core R15 result is even more lopsided in relative terms: 330 versus 62, a 432.3% advantage. Moving to Cinebench R20, the multicore scores are 9745 for the Xeon and 1862 for the Atom, a 423.4% gap, while single-core shows 1375 against 262, a 424.8% delta. Cinebench R23 multicore delivers 23204 for the Xeon versus 4435 for the Atom, a 423.2% difference, and single-core R23 lands at 3275 versus 626, again a 423.2% gap.

The pattern is consistent across every test: the Xeon D-2775TE holds a lead that hovers in the 423% to 432% range, regardless of whether the workload is single-threaded or multi-threaded. The multicore dominance is expected given the 16-core, 32-thread configuration against 4 cores and 4 threads, but the single-core advantage is notable too. The Xeon's base clock is 2000 MHz with a boost of 3.10 GHz, while the Atom runs at 1700 MHz base and boosts to 3.40 GHz. Despite the Atom's higher boost clock, the Xeon still wins single-core tests by roughly 5.3x, indicating that IPC differences and cache architecture play a major role, not just clock speed.

The Atom x7405C has additional PassMark results not present for the Xeon, including data compression at 56317, data encryption at 4004, extended instructions at 2771, find prime numbers at 22, floating point math at 9063, integer math at 14669, multithread at 5218, physics at 460, random string sorting at 8089, and single thread at 1675. These scores cannot be directly compared to the Xeon since the database lacks equivalent Xeon PassMark entries, but they offer context for the Atom's capabilities in isolation.

Specification Differences

The two processors differ across nearly every specification field. The Xeon D-2775TE has 16 cores and 32 threads, while the Atom x7405C has 4 cores and 4 threads. Base clocks are 2000.00 MHz for the Xeon and 1.70 GHz for the Atom, while boost clocks are 3.10 GHz and 3.40 GHz respectively. The Xeon's TDP is 100 W, far higher than the Atom's 12 W. Socket types diverge with Intel BGA 2579 on the Xeon and Intel BGA 1264 on the Atom. The Xeon uses Ice Lake architecture with Ice Lake-D codename, while the Atom uses Amston Lake with Gracemont cores. Both are on a 10 nm process, but the cache structures differ: the Xeon has 80 KB L1 per core, 1.25 MB L2 per core, and 25 MB shared L3, whereas the Atom has 96 KB L1 per core, 2 MB shared L2, and 6 MB shared L3.

Memory support splits the pair as well. The Xeon supports DDR4 only, but over a quad-channel bus with 93.9 GB/s bandwidth, while the Atom supports both DDR4 and DDR5 over a single-channel bus with 38.4 GB/s. ECC memory is supported on the Xeon but not on the Atom. PCIe generations differ: the Xeon offers Gen 4 with 32 lanes, while the Atom offers Gen 3 with 9 lanes. The Xeon targets the Server/Workstation segment, while the Atom targets Mobile. Release dates are 2022-02-23 for the Xeon and 2024-04-07 for the Atom. The launch MSRP for the Xeon is $1751, and the launch MSRP for the Atom is $57. The Xeon's part number is SRM26SRLCM, while the Atom's is SRNEM.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The Intel Xeon D-2775TE is dramatically faster in every recorded multi-core test. In Cinebench R23 multicore, it scores 23204 versus the Atom x7405C's 4435, a 423.2% advantage. R20 multicore shows 9745 versus 1862, also a 423.4% gap, and R15 multicore shows 2338 versus 446, a 424.2% lead.

Q: Does the Intel Atom x7405C have any performance advantage over the Xeon D-2775TE?

A: No. The head-to-head benchmark data shows the Xeon D-2775TE winning all six comparisons. The Atom's highest boost clock is 3.40 GHz, which exceeds the Xeon's 3.10 GHz boost, but this does not translate into a single benchmark victory.

Q: What memory configurations do these processors support?

A: The Xeon D-2775TE supports DDR4 over a quad-channel bus with 93.9 GB/s bandwidth and ECC memory. The Atom x7405C supports DDR4 and DDR5 over a single-channel bus with 38.4 GB/s bandwidth and does not support ECC.

Q: How do their core and thread counts compare?

A: The Xeon D-2775TE has 16 cores and 32 threads, while the Atom x7405C has 4 cores and 4 threads. The Xeon supports simultaneous multithreading, while the Atom does not.

Q: What are the power requirements for each chip?

A: The Xeon D-2775TE has a TDP of 100 W, while the Atom x7405C has a TDP of 12 W. This makes the Atom substantially more power-efficient on paper, though it comes with far lower performance.

Q: When did each processor launch?

A: The Xeon D-2775TE launched on 2022-02-23, and the Atom x7405C launched on 2024-04-07. Both are listed as Active in production status, and both have locked multipliers.