AMD Ryzen 9 PRO 7945 vs Intel Core i3-1305U Comparison

The AMD Ryzen 9 PRO 7945 and the Intel Core i3-1305U are not competing in the same arena; the data shows the Ryzen 9 PRO 7945 is a dominant force, winning all six head-to-head benchmark comparisons with deltas exceeding 452% in every test. The verdict is clear: the Ryzen 9 PRO 7945 is for users who need maximum multi-threaded and single-threaded compute power, while the Core i3-1305U is for those prioritizing mobility and low power consumption, accepting a massive performance deficit.

The Verdict

The benchmark results are unambiguous: the AMD Ryzen 9 PRO 7945 is the outright performance winner, delivering scores that are roughly 4.5 times higher than the Intel Core i3-1305U across all Cinebench tests. The data shows the Ryzen 9 PRO 7945 scores 39,653 in Cinebench R23 multi-core versus the Core i3-1305U's 7,183, a 452% advantage. In single-core R23, the Ryzen 9 PRO 7945 scores 5,598 versus 1,014, a 452.1% lead. For anyone whose workload is bound by CPU performance, the choice is the Ryzen 9 PRO 7945.

However, the Intel Core i3-1305U is not without purpose. Its 15W TDP and mobile segment classification indicate it is engineered for battery-powered systems where the Ryzen 9 PRO 7945's 65W TDP and server/workstation segment are impractical. The Core i3-1305U offers a launch MSRP of $309. The average benchmark score shows the Ryzen 9 PRO 7945 at 11,469, placing it in the 67th percentile, while the Core i3-1305U averages 11,200, sitting in the 66th percentile. This suggests that while the Ryzen 9 PRO 7945 is faster in the tested workloads, the Core i3-1305U's overall benchmark profile is not dramatically lower than its rival's nearest competitors, despite the massive Cinebench deficit.

The data dictates that the Ryzen 9 PRO 7945 is the pick for desktop workstation and server applications where power draw is secondary to throughput. The Core i3-1305U is the pick for thin-and-light laptops where the 15W TDP is a critical design constraint. There is no crossover; the 452% performance gap makes any other conclusion impossible.

Architecture Differences

The two processors are built on fundamentally different architectures and foundries. The AMD Ryzen 9 PRO 7945 uses the Zen 4 architecture, codenamed Raphael, manufactured on a 5 nm process by TSMC. It features 12 cores and 24 threads. In contrast, the Intel Core i3-1305U uses the Raptor Lake architecture, codenamed Raptor Lake-U, built on a 10 nm process by Intel, with only 5 cores and 6 threads.

Cache configurations differ significantly. The Ryzen 9 PRO 7945 has 64 KB of L1 cache per core, 1 MB of L2 per core, and a large 64 MB shared L3 cache. The Core i3-1305U has 80 KB of L1 per core, 1.25 MB of L2 per core, but only 10 MB of shared L3 cache. The Ryzen 9 PRO 7945 also has a far larger transistor count at 13,140 million, with a die size of 2x 71 mm², whereas the Core i3-1305U has no listed transistor count or die size.

Memory and I/O support also set them apart. The Ryzen 9 PRO 7945 supports DDR5 memory with dual-channel bus and 83.2 GB/s bandwidth, along with ECC memory support. The Core i3-1305U supports both DDR4 and DDR5, also dual-channel, but has no listed memory bandwidth and no ECC support. The Ryzen 9 PRO 7945 offers PCIe Gen 5 with 24 lanes (CPU only), while the Core i3-1305U offers PCIe Gen 4 with 8 lanes (CPU only). The Ryzen 9 PRO 7945 includes Radeon Graphics, while the Core i3-1305U includes UHD Graphics 64EU.

Head-to-Head Benchmarks

The benchmark data tells a consistent story of overwhelming AMD dominance. The smallest delta is 452% in Cinebench R23 multi-core, where the Ryzen 9 PRO 7945 scores 39,653 against the Core i3-1305U's 7,183. The largest delta is 453.2% in Cinebench R20 single-core, with scores of 2,351 versus 425. Every single contest is a landslide.

In Cinebench R15 multi-core, the Ryzen 9 PRO 7945 scores 3,996 versus 723, a 452.7% lead. In R15 single-core, the scores are 564 versus 102, a 452.9% advantage. The R20 multi-core test shows 16,654 versus 3,016, a 452.2% delta. The R23 single-core test shows 5,598 versus 1,014, a 452.1% delta. These deltas are remarkably consistent, hovering around 452-453%, indicating that the performance gap is uniform across both single-threaded and multi-threaded workloads.

The Ryzen 9 PRO 7945 also holds higher raw scores in every category. Its lowest single-core score is 564 in R15, which is still 5.5 times higher than the Core i3-1305U's best single-core score of 1,014 in R23. The data shows no scenario where the Intel part is competitive. The wins are recorded as 6 for the AMD part and 0 for the Intel part, and the deltas confirm the absolute nature of this victory.

FAQ

Q: Which processor has higher multi-core performance?

A: The AMD Ryzen 9 PRO 7945 is vastly superior, scoring 39,653 in Cinebench R23 multi-core versus the Intel Core i3-1305U's 7,183, a 452% difference. The AMD part also wins R15 and R20 multi-core tests with similar deltas.

Q: How does single-core performance compare?

A: The AMD Ryzen 9 PRO 7945 leads in every single-core test. In Cinebench R23 single-core, it scores 5,598 versus 1,014, a 452.1% advantage. The R15 and R20 single-core tests show deltas of 452.9% and 453.2%, respectively.

Q: What is the TDP difference between the two?

A: The AMD Ryzen 9 PRO 7945 has a TDP of 65 watts, while the Intel Core i3-1305U has a TDP of 15 watts. This makes the Intel part suited for low-power mobile devices.

Q: Which processor supports ECC memory?

A: The AMD Ryzen 9 PRO 7945 supports ECC memory, while the Intel Core i3-1305U does not. This is a key feature for workstation and server reliability.

Q: What are the process nodes used by each processor?

A: The AMD Ryzen 9 PRO 7945 is built on a 5 nm process by TSMC, while the Intel Core i3-1305U uses a 10 nm process by Intel.

Q: Which processor has more PCIe lanes?

A: The AMD Ryzen 9 PRO 7945 offers PCIe Gen 5 with 24 lanes (CPU only), whereas the Intel Core i3-1305U offers PCIe Gen 4 with 8 lanes (CPU only).

Where Each One Wins

The AMD Ryzen 9 PRO 7945 wins every benchmark category where performance is measured. Its 12 cores and 24 threads, combined with a 64 MB L3 cache and 5.40 GHz boost clock, deliver a 452.7% advantage in Cinebench R15 multi-core and a 452.2% advantage in R20 multi-core. It is the clear choice for server/workstation workloads, including heavy multi-threaded rendering, scientific computing, and virtualization, where its 83.2 GB/s memory bandwidth and ECC support are critical. Its 65W TDP and AM5 socket indicate a desktop or server platform.

The Intel Core i3-1305U has zero benchmark wins in the head-to-head data. However, its strengths lie outside the Cinebench tests. Its 15W TDP makes it the only viable option for fanless or battery-constrained ultraportable laptops. It supports both DDR4 and DDR5 memory, offering flexibility. Its 5 cores and 6 threads are sufficient for basic productivity, and its UHD Graphics 64EU provides integrated graphics. The data shows it has a higher L1 cache per core (80 KB versus 64 KB) and L2 cache per core (1.25 MB versus 1 MB) than the AMD part, though this does not translate into performance wins. Its mobile segment and BGA 1744 socket confirm its purpose in compact devices.

Specification Differences

The two processors differ in nearly every core specification. The AMD Ryzen 9 PRO 7945 has 12 cores and 24 threads, while the Intel Core i3-1305U has 5 cores and 6 threads. The base clock is 3.70 GHz for the AMD part versus 1600.00 MHz for the Intel part. The boost clock is 5.40 GHz versus 4.50 GHz. The TDP is 65 watts versus 15 watts.

The process node is 5 nm for AMD versus 10 nm for Intel. The AMD part uses the Zen 4 architecture and Raphael codename, while the Intel part uses Raptor Lake and Raptor Lake-U. The cache differs: AMD has 64 KB L1 per core, 1 MB L2 per core, and 64 MB shared L3; Intel has 80 KB L1 per core, 1.25 MB L2 per core, and 10 MB shared L3.

Memory support differs: AMD supports only DDR5, while Intel supports DDR4 and DDR5. Memory bandwidth is 83.2 GB/s for AMD, with no listing for Intel. ECC support is present on AMD, absent on Intel. PCIe is Gen 5 with 24 lanes for AMD versus Gen 4 with 8 lanes for Intel. Integrated graphics are Radeon Graphics for AMD and UHD Graphics 64EU for Intel. The market segment is Server/Workstation for AMD and Mobile for Intel. The release date is 2023-06-12 for AMD and 2023-01-03 for Intel. The part numbers are 100-000000598 for AMD and SRMLT for Intel.