CPU Comparison

The AMD A8-7650K and Intel Xeon X5492 are both end-of-life desktop and server/workstation processors, respectively, that land in the same performance percentile. The AMD part secures a win in every head-to-head benchmark in this dataset, with a 6.8% to 6.9% margin across all tested workloads. The A8-7650K’s average benchmark score is 860, while the Xeon X5492 sits at 852, placing both at the 23rd percentile of all CPUs. Despite the Intel chip’s higher base clock and server pedigree, the data consistently favors the AMD processor in every measured test.

The Verdict

The data is unambiguous: the AMD A8-7650K is the faster processor in every benchmark recorded. In Cinebench R15 multi-core, it scores 266 versus the Xeon X5492’s 249, a 6.8% advantage. That lead persists in Cinebench R20 multi-core (1111 vs 1039, +6.9%) and single-core (156 vs 146, +6.8%). The same pattern holds in Cinebench R23, where the AMD chip leads by 6.9% in both multi-core (2647 vs 2475) and single-core (373 vs 349) tests. If your priority is raw benchmark performance, the A8-7650K is the clear pick.

However, the Xeon X5492 is not without its own rationale. It supports ECC memory, a feature entirely absent on the AMD part, and it carries a launch MSRP of $1493. The A8-7650K has no launch MSRP listed. The Intel chip also targets the server/workstation segment, while the AMD part is a desktop processor. For a system requiring ECC memory or running on the Intel Socket 771 platform, the Xeon X5492 is the only viable choice here, despite its benchmark deficit.

The performance difference is consistent but not overwhelming. A 6.9% lead in multi-core workloads is meaningful but unlikely to transform a user’s experience. The real decision hinges on platform requirements and memory needs, not raw speed. If you need ECC, choose the Xeon. If you want the fastest scores in this comparison, choose the A8-7650K.

Architecture Differences

The two processors come from different eras and design philosophies. The AMD A8-7650K uses a 28 nm process node from GlobalFoundries, packing 2,411 million transistors into a 245 mm² die. It is built on the Steamroller architecture, codenamed Kaveri, and features four cores with four threads. Its base clock is 3.30 GHz with a boost clock of 3.80 GHz, and it draws 95 W TDP. The chip includes a Radeon R7 integrated graphics unit, which the Xeon lacks entirely. It also has an unlocked multiplier, allowing overclocking.

The Intel Xeon X5492 is a much older design, built on a 45 nm process from Intel. It contains 820 million transistors spread across a dual-die package with each die at 107 mm². The architecture is Core 2, codenamed Harpertown, with four cores and four threads. Its base clock is slightly higher at 3.40 GHz, but there is no boost clock listed. The TDP is significantly higher at 150 W. It supports ECC memory and uses the Intel Socket 771 platform.

Cache configurations differ notably. The AMD chip has 256 KB of L1 cache and 4 MB of L2 cache. The Intel part lists 64 KB of L1 cache per core (totaling 256 KB across four cores) and 6 MB of L2 cache per die. Neither processor has L3 cache. The AMD part supports dual-channel DDR3 memory with a bandwidth of 34.1 GB/s, while the Xeon supports dual-channel DDR2 and DDR3 but has no bandwidth figure listed. The A8-7650K uses PCIe Gen 3 with 16 lanes (CPU only), while the Xeon uses PCIe Gen 2.

Head-to-Head Benchmarks

The AMD A8-7650K wins all five recorded head-to-head tests. The largest margin is in Cinebench R23 multi-core, where it scores 2647 versus 2475, a 6.9% lead. The same 6.9% delta appears in Cinebench R20 multi-core (1111 vs 1039) and Cinebench R23 single-core (373 vs 349). Cinebench R15 multi-core shows a 6.8% advantage (266 vs 249), and Cinebench R20 single-core also shows 6.8% (156 vs 146).

These results are remarkable for a chip with a lower base clock. The A8-7650K runs at 3.30 GHz base and 3.80 GHz boost, while the Xeon X5492 sits at a fixed 3.40 GHz. The AMD processor achieves its wins despite a 0.10 GHz base clock disadvantage, which points to architectural efficiency gains from the newer Steamroller design over the aging Core 2 architecture. The 28 nm process versus 45 nm likely contributes to better instruction-per-clock performance.

The consistency of the 6.8% to 6.9% margin across single-core and multi-core tests suggests a fundamental architectural advantage rather than a workload-specific quirk. The AMD chip’s integrated memory controller and newer PCIe Gen 3 interface may also play a role, though the benchmark scores do not isolate these factors. The Xeon’s higher TDP of 150 W does not translate into a performance advantage in any of these tests.

FAQ

Q: Which processor has a higher base clock?

A: The Intel Xeon X5492 has a base clock of 3.40 GHz, while the AMD A8-7650K has a base clock of 3.30 GHz. The AMD chip has a boost clock of 3.80 GHz, while the Xeon has no boost clock listed.

Q: Does the Xeon X5492 support ECC memory?

A: Yes, the Intel Xeon X5492 supports ECC memory. The AMD A8-7650K does not support ECC memory.

Q: Which processor has integrated graphics?

A: The AMD A8-7650K includes a Radeon R7 integrated graphics unit. The Intel Xeon X5492 has no integrated graphics.

Q: What is the average benchmark score difference between the two?

A: The AMD A8-7650K has an average benchmark score of 860, while the Intel Xeon X5492 has an average score of 852. This places both at the 23rd percentile of all CPUs.

Q: Is the AMD A8-7650K’s multiplier unlocked?

A: Yes, the AMD A8-7650K has an unlocked multiplier. The Intel Xeon X5492 does not.

Q: How many cores and threads do both processors have?

A: Both the AMD A8-7650K and the Intel Xeon X5492 have four cores and four threads.

Where Each One Wins

The AMD A8-7650K wins every benchmark in this comparison, so its case is straightforward. It dominates in both single-core and multi-core workloads, with a consistent 6.8% to 6.9% advantage across all Cinebench versions. Users running rendering, compilation, or general productivity tasks will see a measurable, if modest, performance gain. The chip’s lower 95 W TDP also makes it easier to cool, and its unlocked multiplier offers overclocking headroom that the Xeon cannot match. The integrated Radeon R7 graphics provide a display output without a discrete GPU, which is a functional advantage for basic systems.

The Intel Xeon X5492 wins on platform-specific features, not raw performance. Its ECC memory support is the standout differentiator, making it the only choice for systems requiring error-correcting memory. It also targets the server/workstation market segment, which may align with legacy Socket 771 motherboard availability. The higher 3.40 GHz base clock is a nominal advantage, but it does not translate into benchmark wins. The Xeon’s dual-die design with 6 MB L2 cache per die may benefit cache-sensitive workloads, but the data does not show this in any recorded test.

For a pure performance comparison, the A8-7650K wins five out of five tests. For a system requiring ECC memory or a specific server platform, the Xeon X5492 is the only option, regardless of its slower benchmark scores.

Specification Differences

The two processors differ across nearly every major specification category. The AMD A8-7650K uses a 28 nm process node from GlobalFoundries, while the Intel Xeon X5492 uses a 45 nm process from Intel. Transistor counts are 2,411 million versus 820 million, and die sizes are 245 mm² versus 2x 107 mm². The AMD chip is built on the Steamroller architecture (codename Kaveri), while the Intel chip uses Core 2 (codename Harpertown).

Base clocks are 3.30 GHz for the AMD part and 3.40 GHz for the Intel part. The AMD chip has a boost clock of 3.80 GHz; the Intel chip has no boost clock. TDP ratings are 95 W for AMD and 150 W for Intel. Sockets are AMD Socket FM2+ versus Intel Socket 771.

Cache layouts differ: the AMD chip has 256 KB L1 and 4 MB L2, while the Intel chip has 64 KB L1 per core (256 KB total) and 6 MB L2 per die. Memory support is DDR3 for AMD, and DDR2/DDR3 for Intel. The AMD chip has a memory bandwidth of 34.1 GB/s; the Intel chip has no bandwidth listed. ECC memory is supported only on the Intel part. PCIe is Gen 3 with 16 lanes (CPU only) on AMD, versus Gen 2 on Intel. Integrated graphics are present only on the AMD chip (Radeon R7). The AMD part has an unlocked multiplier; the Intel part is locked. The Intel Xeon X5492 has a launch MSRP of $1493; the AMD A8-7650K has no launch MSRP listed.