Intel UHD Graphics 620 vs AMD Radeon R7 (Bristol Ridge)

Intel UHD Graphics 620

The Intel UHD Graphics 620 (GT2) is an integrated graphics unit, which can be found in various ULV (Ultra Low Voltage) processors of the Kaby Lake Refresh generation (8th generation Core). Compared to the similar named Intel HD Graphics 620 in the 2016 Kaby Lake CPUs, only the name changed from HD to UHD. It is clocked with up to 1.150 MHz and therefore 100 MHz higher than the old HD Graphics 620 (max. 1.050 MHz) and offer a comparable performance. Due to its lack of dedicated graphics memory or eDRAM cache, the HD 620 has to access the main memory (2x 64bit DDR3/DDR4).

Performance

The exact performance of the UHD Graphics 620 depends on various factors like L3 cache size, memory configuration (DDR3/DDR4) and maximum clock rate of the specific model and as is similar to the Intel HD Graphics 620 and Intel HD Graphics 630. Compared to the average HD Graphics 620, the UHD graphics profits from the quad-core CPU a bit in our gaming benchmarks. Therefore, should be positioned between a GeForce 910M and 920M dedicated graphics card from Nvidia. For games, the drivers however are not that fast updated and tested as with GeForce graphics cards. In our tests, the UHD 620 is most suited for casual games like Team Fortress 2, Rocket League or Farming Simulator 17. See below for a list of modern games tested with various models.

Features

The revised video engine now supports H.265/HEVC Main10 profile in hardware with 10 bit colors. Furthermore, Googles VP9 codec can also be hardware decoded. The first models do not support HDCP 2.2 and therefore Netflix 4K. This was added with the new models in 2017 and beginning of May 2017 also the older CPU models like the i3-7100U are now shipped with a new S-Spec Code that supports HDCP 2.2. HDMI 2.0 however is still only supported with an external converter chip (LSPCon).

Power Consumption

The UHD Graphics 620 can be found in mobile processors specified at 15 W TDP and is therefore suited for compact laptops and ultrabooks. The power consumption during playing The Witcher 3 (with an external monitor) was comparable to a Intel HD Graphics 620 based laptop and on the lowest end of all of our measurements. Dedicated GPUs, like the GeForce 940MX, needed a lot more power.

AMD Radeon R7 (Bristol Ridge)

The AMD Radeon R7 (Bristol Ridge) is an integrated graphics card for the fastest mobile AMD Carrizo APUs. At its launch, the R7 is available on the top model FX9830P with 512 GCN shader units and a core clock of 900 MHz. The technical specifications do not differ from the AMD Radeon R7 in Carrizo, but the clock is up to 100 MHz higher. Depending on the cooling and the configurable TDP (12-45 Watts), the performance can differ quite a lot. The performance also depends on the memory (best performance with dual-channel DDR4).

Architecture and Features

According to AMD, the Radeon R7 consists of eight cores based on the third GCN generation (often called GCN 1.2 or 2.0 in the press). It is therefore very similar to the Tonga desktop chip and supports DirectX 12 (FL 12_0). Furthermore, its shaders can be used with Mantle, OpenGL and OpenCL. HSA 1.0 is supported for running code on both CPU and GPU cores simultaneously.

Compared to the Kaveri generation (Kaveri R7 with GCN 1.1), the new color compression in particular results in better memory utilization and improves the gaming performance by 5-7 %. 

The improved video decoder of Carrizo/Bristol Ridge now includes UVD 6 (Unified Video Decoder), which can decode HVEC / H.265 up to 4K in hardware. Furthermore, the VCE (Video Codec Engine) has been improved for faster transcoding of H.264. More information on architecture and features of the Bristol Ridge architecture can be found in our launch article.

Performance

Depending on the configurable TDP of the Bristol Ridge chips between 12 up to 45 Watts, there can be significant differences in games. Overall, the results are slightly better compared to the Carrizo Radeon R7 due to the higher clocks for comparable model. You can still use the Kaveri R7 benchmarks to check the gaming performance.

Power Consumption

Depending on the configurable TDP (cTDP), the 28 nm chip is specified at 12-45 Watts. It can therefore be used for thin and light notebooks as well as medium-sized devices or All-in-Ones (AiO).