NVIDIA GeForce GTX 660 Ti vs AMD Radeon RX Vega 6 (Ryzen 4000/5000) vs AMD Radeon RX Vega 8 (Ryzen 4000/5000)

NVIDIA GeForce GTX 660 Ti

The NVIDIA GeForce GTX 660 Ti is a high-end desktop graphics card based on the GK104 Kepler chip. It supports DirectX 11 and is manufactured in 28nm at TSMC. The core clock can be up to 980 MHz under load (GeForce Boost) and is a tleast 915 MHz. The GDDR5 VRAM is usually clocked at 1500 MHz (6000 MHz effective data rate).

Due to the higher core clock speed, the performance of the desktop GTX 660Ti is above the mobile GTX 680M (altough the 680M offers a wider memory bus of 256 Bit). Demanding games of 2013 should run in 1920x1080 with maximum settings and 4x Antialiasing fluently. Only Company of Heroes 2 and Hitman: Absolution scored below 30fps in our benchmarks on the average.

The chip offers the 5th generation video processor VP5, which is able to decode MPEG-1, 2, 4, H.264, VC1/WMV9 with a resolution of up to 4K. Furthermore, the included vidoe encoder called NVENC is able to encode H.264 vidoes without stressing the CPU.

The Geforce GTX 660Ti is rated at 150 Watt TDP and the default design uses two 6-pin power connectors.

Beware: For our benchmarks we used a slightly overclocked version that ran with 980-1059 MHz compared to the default 915 - 980 MHz. 

AMD Radeon RX Vega 6 (Ryzen 4000/5000)

The AMD Radeon RX Vega 6 is an integrated GPU for notebooks. It is used in certain Ryzen 5 APUs of the Renoir generation (Ryzen 4000 Mobile), which were launched in early 2020. The iGPU is based on the Vega architecture (5th generation GCN) and has 6 CUs (= 384 of the 512 shaders) clocked at up to 1,500 MHz. Compared to the similar Radeon RX Vega 6 in the Raven Ridge generation (Ryzen 2000 Mobile), the GPU is clocked significantly higher (1.500 versus 1.100 MHz Boost).

The performance depends on the configured TDP (12-54 W at launch), the clocks, the cooling, and the memory configuration). The GPU should benefit from fast dual-channel DDR4-3200 RAM (contrary to DDR4-2133 single-channel, which is also possible).

The Vega architecture offers some improvements over the Polaris generation and now supports DirectX 12 Feature Level 12_1. More information is available in our dedicated article about the Raven Ridge architecture.

The performance is clearly faster than the old RX Vega 6 thanks to the higher clock speed and faster main memory (if used). In first synthetic benchmarks, the Vega 6 was able to reach the performance of a dedicated GeForce MX150. In games it should be somewhere between a GeForce MX230 and MX150.

Thanks to the modern 7nm process and clever power-saving features, the power consumption is comparatively low (according to AMD), so the graphics adapter can also be used for slim and light notebooks.

AMD Radeon RX Vega 8 (Ryzen 4000/5000)

The AMD Radeon RX Vega 8 is an integrated GPU for notebooks. It is used for the Ryzen 7 APUs of the Renoir generation (Ryzen 4000 Mobile) and Cezanne (Ryzen 5000 Mobile). The GPU is based on the Vega architecture (5th generation GCN) and has 8 CUs (= 512 of the 704 shaders) clocked at up to 1,750 MHz (Ryzen 7 4800U) or 2,100 MHz (Ryzen 9 5980HX). The performance depends on the configured TDP (12-25 W at launch), the clocks, the cooling, and the memory configuration). The GPU should benefit from fast dual-channel DDR4-3200 RAM (contrary to DDR4-2133 single-channel, which is also possible). Compared to the similar Radeon RX Vega 8 in the Raven Ridge generation (Ryzen 2000 Mobile), the GPU is clocked significantly higher (1.750 versus 1.100 MHz Boost, +59%).

The Vega architecture offers some improvements over the Polaris generation and now supports DirectX 12 Feature Level 12_1. More information is available in our dedicated article about the Raven Ridge architecture.

The performance is clearly faster than the old RX Vega 8 thanks to the higher clock speed and faster main memory (if used). Still it is positioned in the entry level (compared to dedicated graphics cards) and only suited for low demanding games.

Thanks to the modern 7nm process and clever power-saving features, the power consumption is comparatively low (according to AMD), so the graphics card can also be used for slim and light notebooks.