AMD launches the Ryzen 9 7945HX, its first 16-core mobile CPU


Posts: 643   +123
Staff member
Bottom line: AMD has announced its mobile Ryzen 7045HX series is available starting today. Codenamed Dragon Range, the series is the first to use AMD's chiplet technology to reach 16 cores and is wickedly fast.

Dragon Range is a direct port of the desktop series to the mobile form factor and has the same CPU configurations: 16-core, 12-core, 8-core, and 6-core. Apart from the 7945HX, they all have configurable TDPs that start in the 45-75 W range and boost to around 5GHz in "bursty, single-threaded workloads" from 3+GHz base clocks.

The 7945HX demands its own power bracket: an unprecedented 55-75 W minimum. It has 16 cores -- twice as many as the previous generation's flagship, the 6900HX -- along with a boost clock of 5.4GHz and 80 MB of combined L2 and L3 cache. For comparison, the 6900HX squeezed a 4.9GHz boost clock and 20 MB of cache into a 45 W envelope.

Dragon Range

Model Cores / Threads Base / Boost Clock L2 + L3 Cache cTDP
R9 7945HX 16 / 32 2.5 / 5.4 GHz 80 MB 55-75+ W
R9 7845HX 12 / 24 3.0 / 5.2 GHz 76 MB 45-75+ W
R7 7745HX 8 / 16 3.6 / 5.1 GHz 40 MB 45-75+ W
R5 7645HX 6 / 12 4.0 / 5.0 GHz 38 MB 45-75+ W

AMD benchmarked the 7495HX against the 6900HX a short while ago and found it did 41 percent to 211 percent better in a mix of applications. In Cinebench R23, it was 22 percent faster in the single-threaded test and 123 percent faster in the multi-threaded test. AMD also compared its flagship against the older 16-core i9-12900HX and found the 7495HX was 18 percent to 169 percent faster in various benchmarks that were a bit favorable to the 7495HX.

But now AMD has shared some fairer comparisons between the 7495HX and one of Intel's new CPUs, the i9-13950HX. It features eight p-cores and 16 e-cores, and clocks a little bit higher than the Ryzen part at 5.5GHz. It also consumes about 55 W by default but can be configured to jump up to 157 W under load. AMD tested the two CPUs in 31 titles and found that the 7495HX did better in 26 of them and was 10 percent faster on average.

Benchmarks from vendors like AMD are always prone to bias and mobile parts have especially variable performance because of their many configuration options and their dependency on cooling. AMD sounds a bit presumptuous calling the 7945HX the "world's most powerful mobile processor" but we'll concede that it's a competitor for the title.

OEMs can start selling laptops equipped with the 7945HX, 7845HX, 7745HX, and 7645HX this weekend. AMD expects them to start appearing on shelves by the end of the week. The first models on the market are the M16 and M18 from Alienware, the Scar G17 and Zephyrus Duo from Asus, and the Legion 5 Pro and 7 Pro from Lenovo. More models will follow in the coming months, including from MSI, as will more mobile CPUs from AMD.

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Posts: 657   +1,053
I want a 75W cpu with 16 cores, c'mon AMD put this baby into Socket AM5. Bring on the reviews.

daffy duck

Posts: 123   +89
You can literally take a 7950X and put it in ECO mode and call it a day.
And the performance scaling of Zen 4 at lower power is massively better than cRaptor Lake. Dragon Range max TDP is 115W vs 157W for cRaptor Lake, but in the 45-75W range it will pull further ahead and battery life will be far better in general use.

I'm still waiting for Phoenix though. 7840HX with 8 cores and RDNA3 will make for a powerful thin and light and the iGU will be plenty fast enough for productivity use. Dragon range laptops are expected to also ship with discrete GPU's making costs far higher as well as heat and size.


Posts: 818   +688
No games will utilized the 16 cores. So to pitch the 16 core CPU as being faster in gaming is quite pointless in my opinion. For power users, the extra cores that they can carry about is all good, but the increased base power and power limit is going to hit battery life hard, likewise on Intel based systems.
The efficiency gives so much scope for tweaking and performance. Been waiting for this since I first saw their Rembrandt 8-cores, finally my wait for a worthy replacement for the mighty Clevo P870 might be over. Wish it wasn't soldered but that ship sailed years ago, unfortunately.

Now just have to wait for an ungimped and unstupidly priced chassis. Hurry up Uniwill


Posts: 2,286   +3,993
The 7945HX demands its own power bracket: an unprecedented 55-75 W minimum.

Unprecedented ? You guys must have missed the other brand‘s desktop in laptop CPU that draw considerably more power.