AMD Ryzen 9 4900U 8C/16T APU With Radeon Vega Graphics And 4.3GHz Boost Clocks For Top-End Ultrabook Laptops Leaks

AMD is readying what appears to be the fastest 8 core chip for ultra-thin notebook designs. A mystery 7nm ZEN 2 based AMD Renoir Ryzen 4000 Series with 8 Cores and 16 Threads has appeared online. The leak claims the AMD Renoir CPU is labeled as AMD Ryzen 9 4900U. The APU packs AMD Radeon Vega graphics onboard and can go up to 4.3GHz in Boost Clock speeds. If true, this processor is currently the fastest 8 core Renoir CPU, sitting higher than Ryzen 7 4700U, which can up to 4.2GHz.

A new Ryzen 4000 U-series processor has been spotted in 3DMark’s database. The AMD Ryzen 9 4900U will certainly be embedded within high-end premium ultra-thin laptops and mobile computing devices. Interestingly, the Ryzen 4000 Series AMD APU was unofficially revealed back in February when several OEMs listed the processor for their latest notebook designs. However, it is the only processor belonging to the ZEN 2 based Renoir Mobility Ryzen 4000 family that AMD hasn’t yet officially confirmed. However, as OEMs have mentioned the same, AMD is indeed fabricating the powerful Ryzen 9 4900U.

AMD Ryzen 9 4900U Specifications, Features:

The AMD Ryzen 9 4900U obviously belongs to the AMD Renoir Mobility Ryzen 4000 Series which is based on the ZEN 2 Architecture and fabricated on the 7nm Node. It reportedly packs 8 Cores and 16 Threads. There’s a total of 20 MB cache on the Ryzen 9 4900U.

According to the latest leak, the AMD Ryzen 9 4900U has a Stock or Base Clock Speed of just 1.8 GHz, which is identical to the Ryzen 7 4800U. However, the AMD APU’s Boost Clock Speed can go up to 4.3GHz, which is a 100MHz higher than Ryzen 7 4800U.

The Vega 8 graphics chip on this processor will feature the same peak clock speed of 1750 MHz. According to the leak, the AMD Ryzen 9 4900U was tested on the AMD Majolica test platform for Renoir APUs. Needless to add, the test platform is typical for a notebook and hence the mystery AMD APU should be soldered on to motherboards that will go into ultra-thin Ultrabook laptops.

If the AMD Ryzen 4900U is indeed headed to Ultrabook computers then it would be optimized for a TDP of 15W. However, for some well-ventilated Ultrabook laptops intended for gamers or multimedia editors, the AMD APU could be optimized for 25W cTDP for increased performance output.

AMD Renoir Ryzen 9 4900H/HS Also In Development?

The AMD Ryzen 7 4800U is already giving the latest 10th Gen Intel Comet Lake-U Mobility CPU a very tough competition. The Comet Lake CPUs are still based on the archaic 14nm Fabrication Node. Incidentally, Intel’s fastest Comet Lake-U solution, the Core i7-10710U, only features 6 cores and 12 threads with Gen 9.5 graphics. An 8 Core and 16 Thread AMD APU, and that too with a higher Boost Clock, would obviously make it even more difficult for Intel to sell its latest mobility CPUs.

[Image Credit: WCCFTech]
If that’s not enough, AMD is yet to officially confirm the existence of AMD Ryzen 9 4900H/HS. However, OEMs also revealed these high-end powerful AMD Renoir Ryzen 4000 Series CPUs with higher TDP profiles. Incidentally, AMD is also testing a few Renoir CPUs for desktops.

Alap Naik Desai


A B.Tech Plastics (UDCT) and a Windows enthusiast. Optimizing the OS, exploring software, searching and deploying solutions to strange and weird issues is Alap's main interest.