Radeon RX 6900 XTX vs GeForce GTX 1660 Ti
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 159 | not rated |
| Place by popularity | 33 | not in top-100 |
| Cost-effectiveness evaluation | 44.74 | no data |
| Power efficiency | 19.31 | no data |
| Architecture | Turing (2018−2022) | RDNA 2.0 (2020−2024) |
| GPU code name | TU116 | Navi 21 |
| Market segment | Desktop | Desktop |
| Release date | 22 February 2019 (5 years ago) | 28 October 2020 (4 years ago) |
| Launch price (MSRP) | $279 | no data |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 1536 | 5120 |
| Core clock speed | 1500 MHz | 2075 MHz |
| Boost clock speed | 1770 MHz | 2435 MHz |
| Number of transistors | 6,600 million | 26,800 million |
| Manufacturing process technology | 12 nm | 7 nm |
| Power consumption (TDP) | 120 Watt | 330 Watt |
| Texture fill rate | 169.9 | 779.2 |
| Floating-point processing power | 5.437 TFLOPS | 24.93 TFLOPS |
| ROPs | 48 | 128 |
| TMUs | 96 | 320 |
| Ray Tracing Cores | no data | 80 |
Form factor & compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Interface | PCIe 3.0 x16 | PCIe 4.0 x16 |
| Length | 229 mm | 267 mm |
| Width | 2-slot | 2-slot |
| Supplementary power connectors | 1x 8-pin | 2x 8-pin |
VRAM capacity and type
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | GDDR6 | GDDR6 |
| Maximum RAM amount | 6 GB | 16 GB |
| Memory bus width | 192 Bit | 256 Bit |
| Memory clock speed | 1500 MHz | 2250 MHz |
| Memory bandwidth | 288.0 GB/s | 576.0 GB/s |
| Shared memory | - | - |
Connectivity and outputs
Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.
| Display Connectors | 1x DVI, 1x HDMI, 1x DisplayPort | 1x HDMI 2.1, 2x DisplayPort 1.4a, 1x USB Type-C |
| HDMI | + | + |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_1) | 12 Ultimate (12_2) |
| Shader Model | 6.5 | 6.7 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 2.1 |
| Vulkan | 1.2.131 | 1.3 |
| CUDA | 7.5 | - |
Pros & cons summary
| Recency | 22 February 2019 | 28 October 2020 |
| Maximum RAM amount | 6 GB | 16 GB |
| Chip lithography | 12 nm | 7 nm |
| Power consumption (TDP) | 120 Watt | 330 Watt |
GTX 1660 Ti has 175% lower power consumption.
RX 6900 XTX, on the other hand, has an age advantage of 1 year, a 166.7% higher maximum VRAM amount, and a 71.4% more advanced lithography process.
We couldn't decide between GeForce GTX 1660 Ti and Radeon RX 6900 XTX. We've got no test results to judge.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
