Although the new 16-core mobile processors Intel Alder Lake-HX, designed for portable workstations and powerful gaming laptops, have only recently been presented, Chinese publications are already beginning to publish their reviews. So, the team from the Chinese platform Golden Pig Upgrade Pack published a review of the Core i7-12800HX chip.
According to Intel, the Alder Lake HX series combines processors designed on the basis of the same semiconductor chips used in the desktop Alder Lake S, but optimized for power consumption and moved into a BGA package. The mobile Alder Lake HX has another aspect in common with the desktop devices. They require a separate HM670 chipset on the laptop motherboard, as opposed to the same mobile Alder Lake-P, which has the chipset built into a separate chip residing on the same substrate as the processor core die.
The Alder Lake HX chips support 16 PCIe 5.0 lanes for connecting a graphics card and 4 PCIe 4.0 lanes for an NVMe SSD. The chipset also supports 16 PCIe 4.0 lanes and 12 PCIe 3.0 lanes. The presence of the Intel HM670 chipset can be seen in the photo below (a compact microcircuit circled in red), which also showcases the NVIDIA GN20-E6 GPU, the basis of the mobile GeForce RTX 3070 Ti. On the right side of the image is the Core i7-12800HX.
There is also a difference between mobile BGA and desktop LGA chips. The first is 2.2mm thinner than the desktop version. Some SMD components of the mobile version of the chip have been moved to a different location on the substrate. However, the crystal itself with the cores is in the same place, in the middle.
The Chinese tester got two identical Lenovo Y9000P gaming laptops equipped with GeForce RTX 3070 Ti graphics accelerators and the same amount of DDR5-4800 RAM. The difference between laptops is only in the processors. One uses a 14-core Core i7-12700H (Alder Lake-P), the other a 16-core Core i7-12800HX (Alder Lake-HX). The PL1 and PL2 power consumption limits for the Alder Lake P chip are 115W and 135W, respectively, while the Alder Lake HX model is bumped up to 125W and 175W, respectively.
The Core i7-12800HX offers almost the same single thread performance as the Core i7-12700H. However, its multithreaded performance is 15% higher on average.
In games, the presence of two additional cores and 100 MHz additional maximum clock speed, which for Alder Lake HX is 4.8 GHz, the weather is not.
Both processors have roughly the same performance. The difference in favor of the Core i7-12800HX is only 2.56%, and even then only in some AAA projects.