AMD Athlon PRO 3045B vs Intel Core i7-3540M Comparison

The AMD Athlon PRO 3045B and Intel Core i7-3540M are both dual-core mobile processors with four threads, yet they deliver sharply contrasting performance profiles. Benchmark results indicate the Intel chip wins the majority of head-to-head tests, but the AMD part takes decisive victories in Geekbench, revealing that the choice between them depends entirely on the workload. The data shows the Intel Core i7-3540M leads in 5 of 7 direct comparisons, while the AMD Athlon PRO 3045B secures 2 wins with substantial margins.

Head-to-Head Benchmarks

The Intel Core i7-3540M dominates the Cinebench suite across the board. In Cinebench R15 multicore, Intel scores 254 against AMD’s 237, a delta of -6.7% for the Athlon. The margin is nearly identical in Cinebench R20 multicore, where Intel posts 1060 versus 988, again -6.7%. This pattern continues in Cinebench R23 multicore, with Intel at 2525 and AMD at 2354, a -6.8% difference. Single-core Cinebench results follow the same trend: Intel wins R20 single-core with 149 over 139 (-6.7%) and R23 single-core with 356 over 332 (-6.7%). These consistent six-to-seven percent margins suggest the Intel chip’s higher clock speeds provide a uniform advantage across all Cinebench versions.

The AMD Athlon PRO 3045B flips the script entirely in Geekbench. In Geekbench multicore, AMD scores 1287 against Intel’s 1160, a 10.9% advantage. The single-core result is even more pronounced: AMD achieves 766 while Intel manages only 565, giving the Athlon a 35.6% lead. This is the largest delta between the two processors in any test. The stark contrast between Cinebench and Geekbench outcomes indicates that the AMD architecture excels at the specific workload patterns in Geekbench, while Intel’s Ivy Bridge design handles Cinebench’s rendering tasks more efficiently.

Looking at the aggregate data, the average benchmark score for the AMD Athlon PRO 3045B is 872, while the Intel Core i7-3540M averages 867. This puts the AMD part slightly ahead on the overall average, despite losing the majority of individual tests. Both processors sit at the 23rd percentile of all CPUs, placing them in the same broad performance tier. The nearest rival data confirms this proximity: the AMD chip’s closest competitor is the Intel Atom C5315 with an average score of 871 and a delta of 0.1%, while the Intel i7-3540M’s nearest rival is the Intel Xeon X3460 at 866 with a 0.1% delta.

Architecture Differences

The two processors come from fundamentally different design eras. The AMD Athlon PRO 3045B uses the Zen architecture on a 14 nm process node, fabricated by GlobalFoundries. The Intel Core i7-3540M uses the older Ivy Bridge architecture on a 22 nm process node, fabricated by Intel. This process advantage gives AMD a smaller transistor footprint per area, although the AMD chip has a larger die size at 148 mm² compared to Intel’s 118 mm². The AMD processor integrates 3,500 million transistors, while the Intel part’s transistor count is not listed in the data.

Cache hierarchies differ noticeably. AMD allocates 96 KB of L1 cache per core, while Intel provides 64 KB per core. The L2 cache follows the same pattern: AMD offers 512 KB per core versus Intel’s 256 KB per core. Both processors share 4 MB of L3 cache, so the total cache capacity is identical, but the distribution favors AMD in the lower levels. The larger per-core caches on the AMD side may explain its stronger Geekbench performance, as those tests often benefit from quicker access to frequently used data.

Memory support is another key divergence. The AMD Athlon PRO 3045B supports DDR4 memory with dual-channel operation and a memory bandwidth of 38.4 GB/s. The Intel Core i7-3540M supports DDR3 memory, also dual-channel, but its memory bandwidth is not listed in the data. The AMD part also supports ECC memory, a feature absent from the Intel chip. The integrated graphics differ as well: AMD equips the Radeon Vega (2CU) while Intel uses HD 4000 graphics. Socket compatibility is entirely separate, with AMD using Socket FP5 and Intel using Socket G2 (988B).

FAQ

Q: Which processor has the higher clock speeds?

A: The Intel Core i7-3540M has a base clock of 3.00 GHz and a boost clock of 3.70 GHz. The AMD Athlon PRO 3045B has a base clock of 2.30 GHz and a boost clock of 3.20 GHz.

Q: How do the power requirements compare?

A: The AMD Athlon PRO 3045B has a TDP of 15 watts, while the Intel Core i7-3540M has a TDP of 35 watts. This means the AMD processor is rated for significantly lower power consumption.

Q: Which CPU wins in Geekbench single-core performance?

A: The AMD Athlon PRO 3045B wins decisively with a score of 766, compared to the Intel Core i7-3540M’s 565. This represents a 35.6% advantage for AMD.

Q: What is the production status of each processor?

A: The AMD Athlon PRO 3045B is listed as Active in production. The production status for the Intel Core i7-3540M is not listed in the data.

Q: Do both processors support the same memory type?

A: No. The AMD Athlon PRO 3045B supports DDR4 memory, while the Intel Core i7-3540M supports DDR3 memory. Both use dual-channel configuration.

Q: How close are these two CPUs in overall average benchmark score?

A: The AMD Athlon PRO 3045B has an average benchmark score of 872, while the Intel Core i7-3540M scores 867. The AMD part is 0.6% higher, which is within the margin of error for these tests.

Specification Differences

The two processors differ in nearly every core specification. The AMD Athlon PRO 3045B has a base clock of 2.30 GHz versus Intel’s 3.00 GHz, and a boost clock of 3.20 GHz versus Intel’s 3.70 GHz. The TDP rating is 15 watts for AMD and 35 watts for Intel. Socket compatibility splits between AMD Socket FP5 and Intel Socket G2 (988B). The architecture is Zen (codename Dali) for AMD and Ivy Bridge for Intel, with process nodes of 14 nm versus 22 nm respectively. The AMD chip has a die size of 148 mm² compared to Intel’s 118 mm², and AMD integrates 3,500 million transistors while Intel’s count is not listed.

Cache configurations differ in the lower levels. AMD provides 96 KB of L1 cache per core and 512 KB of L2 cache per core, while Intel provides 64 KB of L1 and 256 KB of L2 per core. Both share 4 MB of L3 cache. Memory support separates them: AMD uses DDR4 with 38.4 GB/s bandwidth and ECC support, while Intel uses DDR3 without ECC support. The PCIe configuration is only listed for AMD at Gen 3 with 12 lanes (CPU only); Intel’s PCIe data is absent. Integrated graphics are Radeon Vega (2CU) for AMD and Intel HD 4000 for Intel.

The Verdict

The data points to a clear split: Intel wins rendering workloads, AMD wins Geekbench workloads. The Intel Core i7-3540M is the better choice for Cinebench-style multi-threaded rendering, where it consistently outperforms the AMD Athlon PRO 3045B by approximately 6.7-6.8% across all tested versions. This advantage likely stems from its higher base and boost clocks, which provide a steady edge in compute-heavy tasks. The Intel chip’s 3.70 GHz boost clock versus AMD’s 3.20 GHz suggests it can sustain higher throughput in short, bursty workloads.

However, the AMD Athlon PRO 3045B is the better choice for Geekbench-style applications, particularly those that stress single-core performance. The 35.6% lead in Geekbench single-core is too large to ignore, and the 10.9% multicore advantage confirms this is not a fluke. The AMD part’s larger per-core caches and newer Zen architecture likely contribute to this dominance. Additionally, the AMD processor’s 15-watt TDP makes it far more suitable for power-constrained mobile designs, though the data does not include battery life tests to quantify this benefit.

For users who prioritize raw rendering performance, the Intel Core i7-3540M is the safer pick given its consistent Cinebench wins. For users who run general-purpose applications that resemble Geekbench’s workload patterns, the AMD Athlon PRO 3045B offers superior performance, especially in single-threaded scenarios. The overall average scores are nearly identical (872 vs 867), so neither processor has a universal claim to superiority.

Where Each One Wins

The Intel Core i7-3540M wins in five specific benchmark categories: Cinebench R15 multicore, Cinebench R20 multicore, Cinebench R20 single-core, Cinebench R23 multicore, and Cinebench R23 single-core. These wins are consistent with margins of -6.7% to -6.8% relative to the AMD part. This makes Intel the clear choice for 3D rendering, video encoding, and other Cinebench-style tasks that rely on sustained multi-threaded compute. The higher clock speeds of the Intel chip (3.00 GHz base, 3.70 GHz boost) provide a straightforward advantage in these workloads.

The AMD Athlon PRO 3045B wins in two categories: Geekbench multicore with a 10.9% margin and Geekbench single-core with a 35.6% margin. These wins indicate that AMD’s Zen architecture handles memory access patterns and single-threaded execution more effectively, as measured by Geekbench’s mixed workload suite. The AMD processor also holds advantages in power efficiency (15-watt TDP vs 35-watt) and memory technology (DDR4 with ECC support), though these are not benchmark scores. For users running productivity applications, web browsing, or code compilation that resemble Geekbench’s test structure, the AMD Athlon PRO 3045B is the better performer.