Introducing the formidable fusion of AMD’s swiftest mobile chip, Dragon Ridge, coupled with its powerhouse desktop technology, 3D V-Cache—the AMD Ryzen 7945HX3D, proclaimed to be the world’s fastest gaming processor for laptops.
AMD’s claim is no mere boast. The Ryzen 9 7945HX3D outperforms its predecessor, the flagship “Dragon Ridge” processor unveiled at CES 2023 in January, by a substantial margin.
Generally, the 7945HX3D’s performance ranges from being on par with the 7945HX to a jaw-dropping 44 percent to 53 percent faster in games like Cyberpunk 2077 and Riftbreaker.
At the core of this achievement lies AMD’s 3D V-Cache, a revolutionary concept that incorporates a significant chunk of cache RAM atop the CPU die, utilizing modular chipsets.
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This added cache efficiently stores frequently accessed instructions in close proximity to the main CPU die. As a result, when a game requires these instructions, the larger cache ensures swift access, eliminating the need to fetch them from the PC’s main memory.
Simply put, it’s like having a serving bowl of food on the dinner table instead of having to walk into the kitchen for refills.
The AMD Ryzen 9 7945HX3D appears to operate at the same frequencies as its predecessor: a base of 2.5GHz, with the ability to boost up to 5.4GHz.
Like the 7945HX, it belongs to the Zen 4 chip family, housing 16 cores and 32 threads while operating at a thermal design power of “55W+” as specified by AMD (the 7945HX’s power consumption ranges from 55W to 75W).
The key distinction, however, is the cache: a total of 144MB, which is 64MB more cache than the 7945HX.
The Ryzen 9 7945HX3D allows gamers and laptop manufacturers the flexibility to operate it below full power. According to AMD, running the chip at just 40W can improve performance by 22 percent while running it at 70W yields an 11 percent improvement compared to disabling the V-Cache entirely.
At lower power, the V-Cache enables the 7945HX3D’s CPU output to synchronize better with the discrete GPU, leading to an overall performance boost compared to the 7945HX, as explained by an AMD spokesperson.
At 70W, the extra power helps the 7945HX catch up, reducing the performance gain provided by the V-Cache.
Ultimately, it is in gaming where the additional performance becomes most pronounced. AMD’s comparison between the Ryzen 9 7945HX3D and the 7945HX clearly demonstrates the advantages offered by the added V-Cache, translating into enhanced gaming experiences.
Joining the ranks of AMD’s sixth 3D V-Cache processors—the Ryzen 5 5600X3D, Ryzen 7 5800X3D, Ryzen 7 7800X3D, Ryzen 9 7900X3D, and Ryzen 7950X3D—the Ryzen 9 7945HX3D is set to make a mark.
The ROG Strix Scar 17 X3D, an upcoming gaming laptop slated for release on August 22, will proudly feature the new chip. Leaked product listings, reported by Hot Hardware and others, hint at impressive specifications for the laptop, including an RTX 4090 GPU, a colossal 32GB of memory, and a mammoth 2TB SSD.
If the past is any indication, we can expect at least a 240Hz 1440p display, if not more, in this new model—a worthy companion for the AMD Ryzen 9 7945HX3D, the world’s fastest laptop gaming processor.