At CES 2023, AMD announced five new 7000 series processor families for laptops in the coming months. His one of the most interesting family was the Ryzen 7040 series ‘Phoenix’ chips. Based on the rough specs shared by AMD, it was the only new laptop APU to feature the latest in Zen 4 CPU cores and RDNA 3 graphics. The official spec sheet has been released. AMD Ryzen 7 7840H It gives more details about one of the Phoenix family members. Also worth noting is that PCIe 5.0 is not supported.
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If we go to the AMD specs link in the intro (AMD’s official Chinese site), we can see that the 7840H features PCIe 4.0 with 20 native lanes. All of these are available in components like graphics and storage. According to AMD, Phoenix chips are meant for “Ultimate Ultrathin” laptops, many without dedicated GPUs and instead relying on proper RDNA 3 onboard graphics, but full PCIe 4.0 x16 interface is available. This leaves a PCIe 4.0 x4 link for the M.2 NVMe slot connected to the CPU.
When it comes to onboard RDNA 3 graphics, the best Phoenix chips feature 12 CUs (768 stream processors) and run at up to 2.9GHz. This configuration is called Radeon 780M by AMD. We’ve already seen some early 3DMark Time Spy benchmarks for this iGPU in action, and it’s about 25% faster than its predecessor (RDNA 2 architecture Radeon 680M). In these tests it was roughly on par with the GeForce RTX 2050 laptop GPU.
Another interesting thing about AMD Phoenix is its memory support. The Ryzen 7 7840H specs show support for both LPDDR5 and LPDDR5x RAM types, with native speeds supported being DDR5-5600 and LPDDR5-7600. The memory controller, on the other hand, appears to be pushing capacity increases with Phoenix chips supporting up to 256GB of RAM. Another feature that is available.
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The other specification confirmed in the Chinese product information sheet is a CCD die size of 178mm2. His L3 cache configuration for this instance is 16MB. Most of the other specs were well known last month, as you can see from the embedded slides from AMD’s CES 2023 presentation above.
Keep in mind that the AMD Ryzen 7045 ‘Dragon Range’ chip will be the most powerful CPU in the laptop series with up to 16C/32T Zen 4 cores and up to 80MB cache. However, this processor features a smaller RNDA 2 iGPU. That’s because it’s a must-have for games and creator laptops with powerful discrete graphics solutions. Also, in contrast to the Phoenix, the Dragon Range has 28 PCIe Gen 5 lanes (24 are available, which is enough for a x16 GPU and x4 SSD pair).
