AMD A8-7650K vs Intel Xeon X3450 Comparison

The Verdict

The recorded data places the AMD A8-7650K ahead of the Intel Xeon X3450 across every benchmark in the comparison set. The AMD part wins all five head-to-head tests, with margins ranging from 7.7% to 8.2%. Its average benchmark score is 860, versus 837 for the Intel Xeon, a difference that lands the AMD chip at the 23rd percentile of all CPUs in the database, while the Xeon sits at the 22nd percentile. For workloads that rely on Cinebench scores, the A8-7650K is the clear choice. The Xeon X3450 still holds relevance in legacy server environments where ECC memory support is a requirement, as that feature is present on the Intel part and absent on the AMD part. However, for a general-purpose desktop build using the FM2+ socket, the A8-7650K offers superior measured performance in every recorded test. The Intel Xeon X3450 is the pick only if the platform requires ECC memory, server-class positioning, or the specific Lynnfield socket layout. The AMD A8-7650K is the pick for anyone prioritizing raw Cinebench performance, single-threaded speed, and an unlocked multiplier for overclocking.

Architecture Differences

The two processors come from different architectural lineages and manufacturing processes. The Intel Xeon X3450 uses the Nehalem architecture, codenamed Lynnfield, built on a 45 nm process at Intel with 774 million transistors on a 296 mm² die. It has 4 cores and 8 threads, with a base clock of 2.67 GHz and a boost clock of 3.20 GHz. Its cache hierarchy includes 64 KB L1 per core, 256 KB L2 per core, and 8 MB of shared L3 cache. Memory support is DDR3 over a dual-channel bus with 21.3 GB/s of bandwidth, and it supports ECC memory. The PCIe interface is Gen 2 with 16 lanes from the CPU. It has no integrated graphics and carries a 95 W TDP.

The AMD A8-7650K uses the Steamroller architecture, codenamed Kaveri, built on a 28 nm process at GlobalFoundries with 2,411 million transistors on a 245 mm² die. It has 4 cores and 4 threads, with a base clock of 3.30 GHz and a boost clock of 3.80 GHz. Cache includes 256 KB L1 and 4 MB L2, with no L3 cache. Memory support is DDR3 over a dual-channel bus with 34.1 GB/s of bandwidth, which is 12.8 GB/s higher than the Intel part. ECC memory is not supported. The PCIe interface is Gen 3 with 16 lanes from the CPU. It integrates Radeon R7 graphics, a feature entirely absent on the Xeon. The TDP is also 95 W, matching the Intel part. The AMD chip has an unlocked multiplier, while the Intel chip is locked. The Xeon targets the server and workstation segment, while the A8-7650K is a desktop part.

The transistor count difference is substantial: the AMD chip integrates over three times as many transistors as the Intel chip, largely due to the integrated graphics and newer process. The smaller 28 nm process allows a smaller die despite the higher transistor count. The Intel part has a larger L3 cache, but the AMD part compensates with a higher memory bandwidth figure. The Xeon's dual-thread capability per core gives it 8 threads total, while the AMD part has 4 threads total, yet the AMD still wins all benchmarks, indicating that its higher clocks and architectural efficiency outweigh the thread count deficit.

Head-to-Head Benchmarks

The AMD A8-7650K wins all five recorded head-to-head comparisons. In Cinebench R15 multicore, the AMD scores 266 against the Intel's 245, a delta of 7.9% in favor of AMD. In Cinebench R20 multicore, the AMD scores 1111 against 1021, an 8.1% margin. The Cinebench R20 single-core test shows the AMD at 156 versus 144, a 7.7% lead. Cinebench R23 multicore has the AMD at 2647 versus 2431, an 8.2% difference, the largest margin in the set. Finally, Cinebench R23 single-core has the AMD at 373 versus 343, an 8.0% lead.

The consistency of the margins is notable. All five tests fall within a narrow band of 7.7% to 8.2%, suggesting that the performance advantage is uniform across both multi-threaded and single-threaded workloads. The single-core gap of 7.7% to 8.0% indicates that the AMD's higher boost clock of 3.80 GHz versus 3.20 GHz contributes directly to its per-thread advantage. The multi-core gap of 7.9% to 8.2% shows that even with half the thread count (4 threads versus 8), the AMD part still outperforms the Intel part in heavily threaded Cinebench loads. This points to architectural efficiency and clock speed overcoming the thread count disparity.

The average benchmark score reinforces the trend: the AMD part averages 860, while the Intel part averages 837, a difference of 23 points. The nearest rival for the AMD is the Intel Core i7-4500U with an average score of 859, placing the AMD just 0.1% ahead of that part. The nearest rival for the Intel Xeon X3450 is the Intel Xeon X5470 with an average score of 839, with the X3450 trailing by 0.3%. The A8-7650K also outperforms the Intel Core i5-3470T (score 863) by 0.4% and the Intel Core i5-2500T (score 856) by 0.4%, while the Xeon X3450 sits between the Core i5-5200U (score 838) and the Core i5-3360M (score 835). These rival comparisons place both CPUs in a similar performance tier, but the AMD consistently finishes on top within that tier.

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD A8-7650K has an average benchmark score of 860, while the Intel Xeon X3450 has an average score of 837. The AMD part sits at the 23rd percentile of all CPUs, compared to the 22nd percentile for the Intel part.

Q: Does the Intel Xeon X3450 support ECC memory?

A: Yes, the Intel Xeon X3450 supports ECC memory. The AMD A8-7650K does not support ECC memory. This is a key distinction for server or workstation use cases.

Q: How large is the performance gap in Cinebench R23 multicore?

A: The AMD A8-7650K scores 2647 in Cinebench R23 multicore, while the Intel Xeon X3450 scores 2431. The AMD is 8.2% faster, which is the largest single-test margin in the head-to-head comparison.

Q: Does the AMD A8-7650K have integrated graphics?

A: Yes, the AMD A8-7650K includes Radeon R7 integrated graphics. The Intel Xeon X3450 has no integrated graphics, making the AMD part suitable for builds without a discrete GPU.

Q: What are the clock speeds of each processor?

A: The Intel Xeon X3450 has a base clock of 2.67 GHz and a boost clock of 3.20 GHz. The AMD A8-7650K has a base clock of 3.30 GHz and a boost clock of 3.80 GHz. The AMD part is faster at both rated speeds.

Q: Which processor has an unlocked multiplier?

A: The AMD A8-7650K has an unlocked multiplier, enabling user overclocking. The Intel Xeon X3450 has a locked multiplier, so it cannot be overclocked in the same manner.

Where Each One Wins

The AMD A8-7650K wins in every benchmark category recorded in the database. It leads in all five Cinebench tests, covering both single-core and multi-core workloads, across multiple versions of the benchmark (R15, R20, R23). The margins are tight but consistent, ranging from 7.7% to 8.2%. This makes the AMD part the better choice for Cinebench-based rendering workloads, general productivity, and any task where clock speed matters more than thread count. The AMD's higher base clock of 3.30 GHz and boost clock of 3.80 GHz give it an edge in single-threaded performance, which is reflected in the R20 and R23 single-core wins of 7.7% and 8.0% respectively. Additionally, the unlocked multiplier on the AMD part provides headroom for further overclocking, which could extend its lead beyond the recorded stock scores.

The Intel Xeon X3450 does not win any head-to-head benchmark in this comparison. Its strengths lie outside of raw Cinebench performance. The Xeon supports ECC memory, which is a critical feature for error-correcting workloads in servers or workstations. It also targets the server and workstation market segment, whereas the AMD part is a desktop processor. The Xeon's 8 threads versus the AMD's 4 threads do not translate into a win in the recorded tests, but in workloads not covered by these benchmarks, such as heavily threaded server tasks that are not Cinebench-based, the additional threads could be beneficial. The Xeon also has a larger L3 cache (8 MB) compared to the AMD's lack of L3 cache, which might help in certain cache-sensitive applications that are not represented in this benchmark set.

In terms of platform differences, the Intel part uses Socket 1156 with PCIe Gen 2, while the AMD part uses Socket FM2+ with PCIe Gen 3. The AMD's PCIe Gen 3 interface offers higher bandwidth for compatible devices. The AMD also has a significantly higher memory bandwidth of 34.1 GB/s versus 21.3 GB/s, which can benefit memory-intensive workloads. The AMD's integrated Radeon R7 graphics provide a display output without a discrete GPU, making it a more versatile choice for basic desktop use. The Intel part requires a separate graphics card.

For a user prioritizing measured performance in Cinebench, the AMD A8-7650K is the clear winner. For a user prioritizing ECC memory support, server-grade reliability, or a specific legacy platform, the Intel Xeon X3450 remains the only option between these two. The data, however, is unambiguous: the AMD part wins all five head-to-head tests, has a higher average score, and sits at a higher percentile of all CPUs. The Xeon's advantages are not reflected in the benchmark scores but rather in its feature set, specifically ECC support and its server-oriented design.