Intel Meteor Lake P-cores Show IPC Regression Over Raptor Lake?
Intel Core Ultra "Meteor Lake" mobile processor may be the the company's most efficient, but isn't a generation ahead of the 13th Gen Core "Raptor Lake" mobile processors in terms of performance. This isn't just because it has an overall lower CPU core count in its H-segment of SKUs, but also because its performance cores (P-cores) actually post a generational reduction in IPC, as David Huang in his blog testing contemporary mobile processors found out, through a series of single-threaded benchmarks. Huang did a SPECint 2017 performance comparison of Intel's Core Ultra 7 155H, and Core i7-13700H "Raptor Lake," with AMD Ryzen 7 7840HS, 7840H "Phoenix, Zen 4," and Apple M3 Pro and M2 Pro.
In his testing, the 155H, an H-segment processor, was found roughly matching the "Zen 4" based 7840U and 7840HS; while the Core i7-13700H was ahead of the three. Apple's M2 Pro and M3 Pro are a league ahead of all the other chips in terms of IPC. To determine IPC, Huang tested all processors with only one core, and their default clock speeds, and divided SPECint 2017 scores upon average clock speed of the loaded core logged during the course of the benchmark. Its worth noting here that the i7-13000H notebook was using dual-channel (4 sub-channel) DDR5 memory, while the Core Ultra 7 155H notebook was using LPDDR5, however Huang remarks that this shouldn't affect his conclusion that there has been an IPC regression between "Raptor Lake" and "Meteor Lake."
In his testing, the 155H, an H-segment processor, was found roughly matching the "Zen 4" based 7840U and 7840HS; while the Core i7-13700H was ahead of the three. Apple's M2 Pro and M3 Pro are a league ahead of all the other chips in terms of IPC. To determine IPC, Huang tested all processors with only one core, and their default clock speeds, and divided SPECint 2017 scores upon average clock speed of the loaded core logged during the course of the benchmark. Its worth noting here that the i7-13000H notebook was using dual-channel (4 sub-channel) DDR5 memory, while the Core Ultra 7 155H notebook was using LPDDR5, however Huang remarks that this shouldn't affect his conclusion that there has been an IPC regression between "Raptor Lake" and "Meteor Lake."