AMD Ryzen 7 4800U vs Intel Xeon E5-2676 v3 Comparison

The Verdict

The data splits this matchup cleanly by workload generation. The AMD Ryzen 7 4800U wins the older Cinebench R15 tests decisively, taking multicore by 28% (1411 vs 1102) and singlecore by 18.1% (183 vs 155). The Intel Xeon E5-2676 v3 flips the script in Cinebench R23, winning multicore by 23.4% (10935 vs 8376) and singlecore by 20% (1543 vs 1235). With two wins apiece, neither chip dominates outright — your choice depends entirely on which benchmark generation matches your target application.

Pick the Ryzen 7 4800U if you need a mobile, low-power processor with a modern Zen 2 architecture, integrated graphics, and stronger legacy single-threaded performance. Pick the Xeon E5-2676 v3 if you need raw multi-threaded throughput in newer workloads, quad-channel memory, ECC support, and a much larger L3 cache — and you can tolerate a 120W TDP in a server/workstation board. The Ryzen is active production; the Xeon is end-of-life.

FAQ

Q: Which CPU has more cores and threads?

A: The Intel Xeon E5-2676 v3 has 12 cores and 24 threads, versus the AMD Ryzen 7 4800U's 8 cores and 16 threads. That extra 50% core count drives the Xeon's R23 multicore advantage.

Q: Why does the Ryzen win Cinebench R15 multicore but lose R23 multicore?

A: The Ryzen 7 4800U scores 1411 in R15 multicore versus the Xeon's 1102, a 28% win. But in R23 multicore, the Xeon scores 10935 versus 8376, a 23.4% win. The R15 test favors the Ryzen's higher boost clock and Zen 2 efficiency, while R23 scales with the Xeon's additional cores and 30 MB shared L3 cache.

Q: Which chip has faster single-core performance?

A: It depends on the test generation. In Cinebench R15 singlecore, the Ryzen wins 183 vs 155 (18.1% faster). In Cinebench R23 singlecore, the Xeon wins 1543 vs 1235 (20% faster). The Ryzen's 4.20 GHz boost clock helps in the older test, while the Xeon's newer-optimized R23 score suggests better sustained single-thread scaling despite a lower 3.00 GHz boost.

Q: Do both CPUs support ECC memory?

A: No. The Xeon E5-2676 v3 supports ECC memory, while the Ryzen 7 4800U does not. This makes the Xeon the only option for error-correcting memory in reliability-focused server or workstation builds.

Q: What are the memory bandwidth differences?

A: The Xeon E5-2676 v3 offers 68.3 GB/s bandwidth over a quad-channel memory bus, while the Ryzen 7 4800U provides 51.2 GB/s over a dual-channel bus. The Xeon's 33% higher bandwidth supports its multi-core workload advantage.

Q: Which processor has integrated graphics?

A: Only the AMD Ryzen 7 4800U has integrated graphics (Radeon RX Vega 8). The Intel Xeon E5-2676 v3 has no integrated graphics, so it requires a discrete GPU.

Architecture Differences

The two processors come from fundamentally different design eras and purposes. The AMD Ryzen 7 4800U uses the Zen 2 architecture on TSMC's 7 nm process node, packing 9,800 million transistors into a 156 mm² die. The Intel Xeon E5-2676 v3 uses the older Haswell architecture on Intel's 22 nm process, with 2,600 million transistors on a much larger 356 mm² die. The Ryzen's smaller, denser process explains its dramatically lower 15W TDP versus the Xeon's 120W TDP.

Cache configurations differ sharply. The Ryzen 7 4800U has 64 KB L1 per core, 512 KB L2 per core, and 8 MB shared L3. The Xeon E5-2676 v3 has 64 KB L1 per core, 256 KB L2 per core (half the Ryzen's per-core L2), but 30 MB shared L3 — nearly four times the Ryzen's L3 pool. That large L3 cache is a hallmark of server processors designed for data-heavy multi-threaded workloads.

The Xeon also brings server-class features the Ryzen lacks: ECC memory support, quad-channel memory, and 40 PCIe Gen 3 lanes (CPU only). The Ryzen counters with integrated Radeon RX Vega 8 graphics, making it a complete APU solution for mobile systems. The Ryzen's part number is 100-000000082; the Xeon's is SR1Y5. The Ryzen belongs to the 4000 series (Renoir codename), while the Xeon sits in the Haswell-EP generation.

Specification Differences

| Specification | AMD Ryzen 7 4800U | Intel Xeon E5-2676 v3 |

|---|---|---|

| Cores | 8 | 12 |

| Threads | 16 | 24 |

| Base Clock | 1800 MHz | 2400 MHz |

| Boost Clock | 4200 MHz | 3000 MHz |

| TDP | 15W | 120W |

| Socket | AMD Socket FP6 | Intel Socket 2011-3 |

| Process Node | 7 nm (TSMC) | 22 nm (Intel) |

| Foundry | TSMC | Intel |

| Transistors | 9,800 million | 2,600 million |

| Die Size | 156 mm² | 356 mm² |

| L2 Cache | 512 KB per core | 256 KB per core |

| L3 Cache | 8 MB shared | 30 MB shared |

| Memory Support | DDR4, LPDDR4 | DDR3, DDR4 |

| Memory Bus | Dual-channel | Quad-channel |

| Memory Bandwidth | 51.2 GB/s | 68.3 GB/s |

| ECC Memory | No | Yes |

| PCIe | Gen 3 | Gen 3, 40 Lanes (CPU only) |

| Integrated Graphics | Radeon RX Vega 8 | None |

| Market Segment | Mobile | Server/Workstation |

| Production Status | Active | End-of-life |

The Xeon's base clock is 33% higher (2.40 GHz vs 1.80 GHz), but the Ryzen's boost clock is 40% higher (4.20 GHz vs 3.00 GHz). This explains the split benchmark results: the Ryzen's high boost helps in shorter, single-thread bursts, while the Xeon's higher base clock and extra cores sustain multi-threaded loads.

Head-to-Head Benchmarks

The Cinebench R15 multicore test is the Ryzen's strongest showing. The 4800U scores 1411 against the Xeon's 1102, a 28% margin. That is a huge gap for a processor with 4 fewer cores — the Zen 2 architecture's efficiency and the higher 4.20 GHz boost clock overcome the core deficit in this older benchmark.

Cinebench R15 singlecore follows the same pattern. The Ryzen scores 183, the Xeon 155, giving AMD an 18.1% win. This test relies heavily on per-core speed and IPC, where the Ryzen's newer architecture and higher boost clock shine.

Cinebench R23 reverses everything. The Xeon E5-2676 v3 scores 10935 multicore against the Ryzen's 8376, a 23.4% victory. The Xeon's 12 cores, 24 threads, 30 MB L3 cache, and 68.3 GB/s memory bandwidth all contribute to this newer benchmark's heavy multi-threading scaling. The Ryzen's 8 cores simply cannot keep pace once the workload spreads across more threads.

Cinebench R23 singlecore also goes to the Xeon, scoring 1543 versus the Ryzen's 1235 — a 20% margin. This is notable because the Ryzen has a significantly higher boost clock (4.20 GHz vs 3.00 GHz), yet the Xeon still wins. This suggests the Xeon's Haswell architecture delivers better sustained single-thread performance in the R23 workload, perhaps due to thermal headroom in a 120W TDP envelope versus the Ryzen's 15W constraint.

The overall benchmark average tells a close story: the Ryzen 7 4800U averages 3218, while the Xeon E5-2676 v3 averages 3163. Both sit at the 53rd percentile of all CPUs, with the Ryzen's nearest rival being the AMD Ryzen 3 PRO 5350GE at 0% delta, and the Xeon's nearest rival the AMD Ryzen 5 5560U at 0% delta. In practical terms, these chips perform within 1.7% of each other on average, but the distribution of that performance is wildly different.

Where Each One Wins

AMD Ryzen 7 4800U wins when: You need a mobile processor that fits in a 15W TDP envelope. The data shows it dominates legacy Cinebench R15 workloads, winning multicore by 28% and singlecore by 18.1%. It is the only option here with integrated graphics (Radeon RX Vega 8), making it suitable for compact systems without a discrete GPU. Its 7 nm process and 9,800 million transistors in a 156 mm² die deliver modern efficiency. It is actively in production, so supply is not a concern. The Ryzen's 8 MB L3 cache and 512 KB L2 per core suit workloads that prefer higher per-core cache over massive shared pools. For single-threaded legacy applications, the 4.20 GHz boost clock is decisive.

Intel Xeon E5-2676 v3 wins when: You need maximum multi-threaded throughput in current-generation benchmarks. The data shows it wins Cinebench R23 multicore by 23.4% and singlecore by 20%. Its 12 cores, 24 threads, 30 MB L3 cache, and quad-channel 68.3 GB/s memory bandwidth make it the stronger choice for server or workstation builds running modern, heavily threaded software. ECC memory support is critical for data integrity in professional environments — the Ryzen cannot do this. The 120W TDP and Socket 2011-3 platform indicate a desktop/server-class system, not a mobile device. With 40 PCIe Gen 3 lanes (CPU only), it offers more expansion headroom for multiple GPUs or NVMe drives. Its 2.60 billion transistor count on a 356 mm² die is lower than the Ryzen, but the larger L3 cache compensates in data-heavy workloads.

The honest summary: the Ryzen 7 4800U is the modern, efficient, mobile APU that wins legacy tests. The Xeon E5-2676 v3 is the older, power-hungry server chip that wins newer tests through raw core count and cache. Match the benchmark generation to your actual software, and the choice becomes clear. If your applications are older or lightly threaded, the Ryzen wins. If they are new and heavily threaded, the Xeon wins. Neither is a universal champion.