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Fastest laptop CPU in the world? Intel introduces Core i9-12900HX






16 overclockable cores, up to 128 GB DDR5 ECC RAM and 48 PCIe lanes: With the HX series, Intel is presenting seven new CPUs for high-end gaming notebooks and mobile workstations.

Intel today presented the latest addition to the 12th Core i generation based on Alder Lake as part of the Intel Vision: the HX series. For the first time in the mobile segment, this offers up to 16 overclockable computing cores with a processor base power (PBP) of 55 watts and clock rates of up to 5 GHz. In addition, the CPU series provides up to 48 PCIe lanes – and the memory controller can address up to 128 GB DDR5 ECC memory. The HX series, which is intended to replace the previous mobile Xeon CPUs, is aimed at enthusiasts on the one hand who need as much mobile computing power as possible and on the other hand at hardcore gamers who want to get the most out of their device.

The P and U series is now joined by the H series for performance-hungry laptop users

Enlarge

The P and U series is now joined by the H series for performance-hungry laptop users

©Intel

Seven new processors for enthusiasts

With Alder Lake HX, Intel is porting the chip known from the 12th generation of desktop processors from the Land Grid Array (LGA) to the Pin Grid Array (PGA). In fact, the package is the same size with dimensions of 45 to 37.5 mm, there are only differences in the height, since the heat spreader is missing. Accordingly, the two top models Core i9-12950HX and Core i9-12900HX offer the same configuration as the Core i9-12900K (to the test report): eight performance and efficient cores each as well as 30 MB of L3 cache.

The seven new CPU models of the HX series

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The seven new CPU models of the HX series

©Intel

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The clock rates are of course lower, since the processor base power of all new processors is 55 watts and the maximum turbo power (MTP) is 157 watts. This is a decent power consumption for mobile processors, with the previous models the MTP was still 115 watts. The HX series is therefore clearly aimed at high-end gaming notebooks and mobile workstations.

Gaming performance of the 12900HX according to Intel's own claims

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Gaming performance of the 12900HX according to Intel’s own claims

©Intel

The total of 48 PCI Express lanes that are available, specifically: 16x PCIe Gen5, 20x PCIe Gen4 and 12x PCIe Gen3 also speak in favor of the latter. This makes Alder Lake HX not only the first platform to offer PCIe 5.0 support in the mobile segment, but also supports up to four M.2 SSDs for as much and fast storage space as possible. In addition, all HX processors can be overclocked and support DDR5 RAM with XMP 3.0 profiles, whereby the RAM can be further tuned manually.

Block diagram of the HX platform with the most important key functions

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Block diagram of the HX platform with the most important key functions

©Intel

In addition, the chipset – called the Platform Controller Hub (PCH) at Intel – comes with factory controllers for up to 14x USB 2.0, 12x USB 3.0, 8x SATA 3.0, 2x Thunderbolt 4.0 and the fastest WiFi standard WiFi 6E. Intel has also drilled out the communication channel between CPU and PCH in the 12th core generation: The Direct Media Interface (DMI) in version 4.0 also benefits from 8 channels in the HX series, each with up to 16 gigatransfers per second.

Three of the new models also support Intel’s business platform vPro and can address ECC (Error Checking and Correction) memory, one i5, one i7 and one i9 each. Due to the fact that Intel ultimately recycles the desktop CPU, the integrated graphics unit offers a maximum of 32 execution units (EUs), as with the Core i9-12900K. Since Intel states that all systems based on the HX platform should be equipped with a dedicated graphics unit, that doesn’t matter too much.

The following table provides an overview of the mobile CPUs of the H and HX series, the new CPUs are included

fat

highlighted and the processors with vPro and ECC support

italic

:

CPU

cores/threads

P cores/E cores

L3 cache

Max Turbo

GPU cores

PBP / MTP

i9-12950HX (vPRO)

16C/24T

8P/8E

30MB

5.0GHz

32

55/157W

i9-12900HX

16C/24T

8P/8E

30MB

5.0GHz

32

55/157W

i9-12900HK

14C/20T

6P/8E

24MB

5.0GHz

96

45/115W

i9-12900H

14C/20T

6P/8E

24MB

5.0GHz

96

45/115W

i7-12850HX (vPRO)

16C/24T

8P/8E

25MB

4.8GHz

32

55/157W

i7-12800HX

16C/24T

8P/8E

25MB

4.8GHz

32

55/157W

i7-12800H

14C/20T

6P/8E

24MB

4.8GHz

96

45/115W

i7-12700H

14C/20T

6P/8E

24MB

4.7GHz

96

45/115W

i7-12650HX

14C/20T

6P/8E

24MB

4.7GHz

32

55/157W

i7-12650H

10C/16T

6P/4E

24MB

4.7GHz

64

45/115W

i5-12600HX (vPRO)

12C/16T

4P/8E

18MB

4.6GHz

32

55/157W

i5-12600H

12C/16T

4P/8E

18MB

4.5GHz

80

45/115W

i5-12500H

12C/16T

4P/8E

18MB

4.5GHz

80

45/115W

i5-12450HX

8C/12T

4P/4E

12MB

4.4GHz

16

55/157W

i5-12450H

8C/12T

4P/4E

12MB

4.4GHz

48

45/115W

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