Radeon RX 6400 review

Sapphire Radeon RX 6400 Pulse review  .

AMD has recently allocated 6nm silicon to develop two mainstream graphics cards based on the RDNA 2 architecture. The Radeon RX 6500 XT and the Radeon RX 6400 are priced between 160 USD, and they are targeted towards gamers looking for FHD gaming. Upon reviewing the RX 6500 XT, we found it disappointing that the RX 6400 is based on the same Navi 24 architecture. The card is tied to a PCIe Gen x4 link (3.0/4.0) and performs at RX 470/480 performance levels, as long as you stick to Full HD and do not run out of graphics memory (which is bound to happen fast with only 4 GB in 2022). These cards are positioned as a maximum 1920×1080 offering and will include a GPU based on NAVI24. The Navi 24 GPU-based graphics cards are manufactured on a 6nm process and have a maximum of 4 GB of gddr6 memory, connected through a very restricted 64-bit memory interface.

The RX 6400 utilizes the Navi 24 silicon, similar to the RX 6500 XT, which was launched earlier this year. It activates 12 out of the 16 computing units present on the silicon, resulting in 768 stream processors, 12 Ray Accelerators, 48 TMUs, and 32 ROPs. The processor supports DirectX 12 Ultimate API features such as ray tracing. The memory subsystem is identical to that of the RX 6500 XT, providing 4 GB of GDDR6 memory through a 64-bit wide memory bus at a data rate of 16 Gbps, resulting in a total memory bandwidth of 128 GB/s. Additionally, 16 MB of on-die Infinity Cache memory is included to enhance performance.

NAVI24.

The Navi GPU 24 has been produced using TSMC’s 6 nm process, confirming previous rumors. It is expected to be the final chipset of this generation. Additionally, this chip marks AMD’s first consumer product to be manufactured on a node smaller than 7 nanometers. With a chip area of around 107 square millimeters, it can accommodate “up to 16” compute units operating simultaneously, resulting in a total of 1024 computational cores or shader processors. In comparison to Navi 23, which powers the Radeon RX 6600 cards, Navi 24 is approximately half the size. It will feature a 16 MB Infinity Cache and up to 4 GB of GDDR6 RAM on a 64-bit memory bus, making it suitable for low-cost PCs and 1080p resolution gaming.

The RX 6400 is in direct competition with Nvidia’s aging GTX 1650 Super and GTX 1650, as well as AMD’s earlier models RX 480 / 5500 XT, and the slightly pricier RX 6500 XT. Let’s take a look at how their specifications stack up. Both cards come equipped with one DisplayPort and HDMI port.