Intel Pentium Gold G6500 vs Intel Xeon E5-1603 v3 Comparison

Head-to-Head Benchmarks

The head-to-head data is unusually one-sided. Across every Cinebench test recorded, the Intel Xeon E5-1603 v3 wins, and it does so with remarkable consistency. In multi-core workloads, the Xeon leads by roughly 15.7% to 15.8% across all three Cinebench versions. Specifically, in Cinebench R15 multi-core, the Xeon posts 382 points against the Pentium Gold G6500’s 322, a delta of -15.7% from the Pentium’s perspective. The pattern holds in Cinebench R20 multi-core: 1595 versus 1343, a -15.8% gap. Cinebench R23 multi-core shows the same story: 3798 versus 3199, again -15.8%.

What is more surprising is that the Xeon also dominates single-core performance, despite the Pentium’s much higher base clock. The Pentium Gold G6500 runs at 4.10 GHz base, while the Xeon E5-1603 v3 is locked to 2.80 GHz. Yet in Cinebench R20 single-core, the Xeon scores 225 against the Pentium’s 189 — a -16% delta. In Cinebench R23 single-core, the Xeon’s 536 beats the Pentium’s 451, a -15.9% gap. This is a curious result. The data suggests that the older Haswell architecture, despite its lower clock, delivers better per-thread performance in these specific tests. Or perhaps the Xeon’s larger cache and different memory subsystem compensate for the clock disadvantage.

The consistency of the deltas — all hovering between -15.7% and -16% — is striking. It implies a systematic performance advantage rather than a workload-specific quirk. The Xeon wins 5 out of 5 head-to-head benchmarks. The Pentium Gold G6500 records zero wins. In terms of average benchmark score, the two are nearly identical: the Pentium averages 1101, the Xeon 1098. But that aggregate figure masks the fact that the Xeon wins every individual test where both were run under the same conditions. The near-identical averages are explained by the fact that the Pentium has more single-core tests in its benchmark set, while the Xeon has additional tests not shared head-to-head.

Looking at the nearest rivals for each CPU provides context. The Pentium Gold G6500 sits at the 31st percentile of all CPUs, with an average score of 1101. Its closest rival, the Pentium Gold G6605, scores 1103 (delta -0.2%), and the Xeon E5-2603 v3 scores 1103 as well (-0.2%). The Xeon E5-1603 v3 also sits at the 31st percentile, averaging 1098, with its nearest rival being the AMD PRO A10-8850B at 1098 (0% delta). So both CPUs occupy the same performance tier overall, yet in direct comparison, the Xeon is consistently ahead. This suggests that the Pentium’s average is propped up by tests the Xeon didn’t compete in, or that the Xeon’s advantage is concentrated in the Cinebench suite.

FAQ

Q: Which CPU wins in multi-core Cinebench tests?

A: The Intel Xeon E5-1603 v3 wins all three multi-core tests. In Cinebench R15, it scores 382 versus 322 for the Pentium Gold G6500. In R20, it scores 1595 versus 1343. In R23, it scores 3798 versus 3199. The delta is -15.7% to -15.8% each time.

Q: Is the Pentium Gold G6500 faster in single-core tests due to its higher clock?

A: No. Despite the Pentium’s 4.10 GHz base clock versus the Xeon’s 2.80 GHz, the Xeon wins single-core tests. In Cinebench R20 single-core, the Xeon scores 225 against 189. In R23 single-core, it scores 536 against 451. The deltas are -16% and -15.9%, respectively.

Q: Do the two CPUs have similar overall benchmark averages?

A: Yes, they are nearly identical. The Pentium Gold G6500 has an average benchmark score of 1101, while the Xeon E5-1603 v3 averages 1098. Both sit at the 31st percentile of all CPUs.

Q: How does the Xeon E5-1603 v3 compare to its nearest rivals?

A: Its closest rival is the AMD PRO A10-8850B, with both scoring 1098 on average (0% delta). It also trails the Intel Pentium 6805 and Intel Core i5-3450S by 0.1% (1099 each).

Q: How does the Pentium Gold G6500 compare to its nearest rivals?

A: The Pentium Gold G6605 is its closest rival, scoring 1103 against 1101 (-0.2%). The Intel Core i5-3450S and Intel Pentium 6805 both score 1099 (0.2% ahead of the Pentium). The Intel Xeon E5-2603 v3 scores 1103 (-0.2%).

Q: Does the Xeon E5-1603 v3 have any benchmark that the Pentium doesn’t?

A: Yes. The Xeon has a Cinebench R15 single-core score of 54, which is not present in the Pentium’s benchmark list. The Pentium has no R15 single-core score recorded.

Architecture Differences

The two CPUs come from different architectural eras. The Pentium Gold G6500 is built on Comet Lake, using a 14 nm process node. The Xeon E5-1603 v3 is based on Haswell-EP, fabricated on a 22 nm node. This generational gap explains several differences. The Xeon is a larger, more complex die: it contains 2,600 million transistors on a 356 mm² die, while the Pentium’s transistor count and die size are not listed in the data.

Clock speeds differ significantly. The Pentium runs at 4.10 GHz base with no boost clock listed. The Xeon runs at 2.80 GHz base, also with no boost. Despite the lower clock, the Xeon wins all benchmarks, suggesting that architectural efficiency or other factors compensate.

Cache configurations also differ. Both have 64 KB of L1 per core and 256 KB of L2 per core. However, the L3 cache is very different: the Pentium has 4 MB shared, while the Xeon has 10 MB shared. That 2.5x difference in L3 likely contributes to the Xeon’s superior performance in these tests.

The memory subsystems are distinct as well. The Pentium supports dual-channel DDR4 with a bandwidth of 42.7 GB/s. The Xeon supports quad-channel DDR4 with a bandwidth of 59.7 GB/s. This 40% bandwidth advantage may explain the Xeon’s consistent edge in multi-threaded workloads.

Integrated graphics separate the two. The Pentium includes UHD Graphics 630, while the Xeon has no integrated graphics at all. For systems relying on a discrete GPU, this matters little, but for basic display output, the Pentium has an advantage.

Production status differs: the Pentium is Active, while the Xeon is End-of-life. The release dates reflect this: the Pentium launched on April 29, 2020, while the Xeon launched on September 7, 2014.

Specification Differences

| Specification | Intel Pentium Gold G6500 | Intel Xeon E5-1603 v3 |

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

| Cores | 2 | 4 |

| Threads | 4 | 4 |

| Base Clock | 4.10 GHz | 2.80 GHz |

| TDP | 58 W | 140 W |

| Socket | Intel Socket 1200 | Intel Socket 2011-3 |

| Architecture | Comet Lake | Haswell-EP |

| Process Node | 14 nm | 22 nm |

| Transistors | Not listed | 2,600 million |

| Die Size | Not listed | 356 mm² |

| L3 Cache | 4 MB (shared) | 10 MB (shared) |

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

| Memory Bandwidth | 42.7 GB/s | 59.7 GB/s |

| ECC Memory | No | Yes |

| PCIe Lanes | 16 (Gen 3) | 40 (Gen 3) |

| Integrated Graphics | UHD Graphics 630 | None |

| Market Segment | Desktop | Server/Workstation |

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

| Release Date | April 29, 2020 | September 7, 2014 |

| Part Number | SRH3U | SR20K |

The Xeon has twice the cores (4 versus 2) but the same thread count (4 versus 4), meaning it lacks hyper-threading while the Pentium has it. The TDP difference is stark: 58 W versus 140 W. The Xeon draws more than double the power. The socket is incompatible (Socket 1200 versus Socket 2011-3). The Xeon supports ECC memory, the Pentium does not. The Xeon offers 40 PCIe lanes versus 16. Neither CPU has an unlocked multiplier.

Where Each One Wins

The Xeon E5-1603 v3 wins every benchmark in the head-to-head comparison. That includes all multi-core tests and all single-core tests. In Cinebench R15 multi-core, it wins 382 to 322. In R20 multi-core, 1595 to 1343. In R23 multi-core, 3798 to 3199. In single-core, it wins R20 (225 to 189) and R23 (536 to 451). The Xeon also has an additional Cinebench R15 single-core score of 54, which the Pentium doesn’t have recorded.

The Pentium Gold G6500 has no benchmark wins in the head-to-head data. However, it does have advantages outside of raw compute benchmarks. It includes integrated graphics (UHD Graphics 630), which the Xeon lacks entirely. It has a much lower TDP of 58 W versus 140 W, making it far easier to cool and power. It is a newer product, released in 2020 versus 2014, and is still in active production while the Xeon is end-of-life.

In terms of platform features, the Pentium uses the modern Socket 1200, while the Xeon uses the older Socket 2011-3. The Pentium has half the PCIe lanes (16 versus 40) but that may be sufficient for basic desktop use. The Xeon’s quad-channel memory and 59.7 GB/s bandwidth give it a clear edge in memory-heavy workloads, and its 10 MB L3 cache is 2.5x larger.

For use cases, the Xeon is the clear choice for multi-threaded compute tasks where its 4 physical cores outperform the Pentium’s 2 cores with hyper-threading. Its ECC memory support makes it suitable for workstation or server environments where data integrity is critical. The Pentium, with its integrated graphics and lower power draw, is better suited for basic desktop systems, media PCs, or office tasks where the CPU isn’t the bottleneck.

The Verdict

The data is unambiguous: the Intel Xeon E5-1603 v3 outperforms the Intel Pentium Gold G6500 in every single benchmark where they are directly compared. Across five head-to-head tests, the Xeon leads by margins between 15.7% and 16%. This holds true even in single-core tests, where the Pentium’s higher base clock (4.10 GHz versus 2.80 GHz) does not translate into a win.

The Xeon’s advantage likely stems from its 4 physical cores, larger 10 MB L3 cache, and quad-channel memory with 59.7 GB/s bandwidth. These architectural features outweigh the Pentium’s newer 14 nm process and higher clock speed. The Xeon also offers ECC memory support and 40 PCIe lanes, making it a more capable platform for workstation tasks.

Who should pick the Xeon? Anyone running multi-threaded applications, memory-intensive workloads, or systems requiring ECC memory. The benchmark data shows it wins across the board. The fact that it is end-of-life and has a 140 W TDP are drawbacks, but the performance numbers speak for themselves.

Who should pick the Pentium Gold G6500? Users who need integrated graphics, lower power consumption (58 W versus 140 W), or a modern Socket 1200 platform. The data shows it loses every benchmark to the Xeon, but its average score of 1101 is virtually identical to the Xeon’s 1098. That means in a broader set of tests, the Pentium holds its own. It is also an active product, meaning easier availability and ongoing support.

The verdict from the data: for raw compute performance, the Xeon E5-1603 v3 is the superior CPU. For a balanced desktop system with graphics output and lower power draw, the Pentium Gold G6500 is the more practical choice — just not the faster one. The Xeon wins 5-0 in head-to-head benchmarks, and that is the statistic that matters most.