AMD Radeon RX 640 vs Intel UHD Graphics 770

AMD Radeon RX 640

The AMD Radeon RX 640 is mobile mid-range graphics card for laptops based on the Polaris architecture. It features 640 shaders (10 CUs) or 512 shaders (8 CUs) with different clock speeds. Compared to the older RX 550(X), the RX 640 seems to offer only half of the memory bandwidth (64 Bit memory bus instead of 128 Bit).

The performance should be slightly lower than the old RX 550 and therefore a Nvidia GeForce MX150. Only low demanding games are therefore playable with the GPU. In our benchmarks of the Thinkpad E15 the RX640 is slightly slower than an average GeForce MX330 (+4%) / MX250 / MX150. Therefore, the performance may not be enough for very demanding games. For example, Ghost Recon Breakpoint only achieved 26 fps on average in the lowest settings.

Intel UHD Graphics 770

The UHD Graphics 770 is an integrated graphics card (IGP, GT1) in Alder Lake and Raptor Lake SoCs that offers 32 execution units (EUs) and a clock speed of up to 1.65 GHz (depending on the CPU model).

The performance depends on the CPU model it is integrated in and the used memory. The gaming performance is even on fast models only suited for low demanding games in 720p and low detail settings. Higher demanding games like Cyberpunk 2077 or Dying Light 2 (see benchmarks below) did not run well in our tests.

The GPU supports up to 4 displays with eDP 1.4b (5k120), DisplayPort 1.4a (8k60) and HDMI 2.1 (4k60). 

The Alder Lake SoCs are manufactured in the "Intel 7" named process (enhanced 10nm at Intel).