AMD Radeon RX 6900 XT vs NVIDIA GeForce GTX 660 Ti
The Radeon RX 6900 XT has 603% better performance than the GeForce GTX 660 Ti for the 3DMark 11 Performance GPU benchmark.
The Radeon RX 6900 XT has 110% better value for the money than the GeForce GTX 660 Ti for the 3DMark 11 Performance GPU benchmark.
Summary
About the AMD Radeon RX 6900 XT GPU
The AMD Radeon RX 6900 XT is a desktop graphics card that launched in Q4 2020 with a MSRP of $999. It is built on the RDNA 2.0 GPU microarchitecture (codename Navi 21) and is manufactured on a 7 nm process.
Memory
The RX 6900 XT has 16 GB of GDDR6 memory, with a 2,000 MHz memory clock and a 256 bit interface. This gives it a memory bandwidth of 512 Gb/s, which affects how fast it can transfer data to and from memory. GPU memory stores temporary data that helps the GPU with complex math and graphics operations. More memory is generally better, as not having enough can cause performance bottlenecks.
Cores and Clock Speeds
The RX 6900 XT includes 5,120 stream processors (SPs), the processing units for handling parallel computing tasks. The GPU operates at a core clock speed of 1,825 MHz and can dynamically boost its clock speed up to 2,250 MHz. It usually operates at 2,015 MHz during typical gaming workloads. Complementing the processing units are 320 texture mapping units (TMUs) for efficient texture filtering and 128 render output units (ROPs) for pixel processing. Additionally, the GPU features 80 ray accelerators dedicated to real-time ray tracing calculations.
Compatibility & Power Consumption
The RX 6900 XT is a large graphics card, occupying 3 PCIe 4.0 x16 expansion slots. It supports HDMI 2.1, DisplayPort 1.4a, USB Type-C display connections. With a thermal design power (TDP) of 300 W and a large, 3-slot size, it is recommended to use a power supply of 700 W and a case with sufficient space to accommodate the card. Compare your card's model and your case's dimensions to verify compatibility.
Benchmark Performance & Value
The RX 6900 XT has the 18th best 3DMark 11 Performance GPU score among the 543 benchmarked GPUs in our database. It achieves 56.45% of the performance of the best benchmarked GPU, the NVIDIA GeForce RTX 4090. Its 59,119 score and $999 launch price (MSRP) gives it a performance per dollar of 59.18. This is the 55th best in value for the 3DMark 11 Performance GPU benchmark.
About the NVIDIA GeForce GTX 660 Ti GPU
The NVIDIA GeForce GTX 660 Ti is an end-of-life desktop graphics card that released in Q3 2012 with a MSRP of $299. It is built on the Kepler GPU microarchitecture (codename GK104) and is manufactured on a 28 nm process.
Memory
The GTX 660 Ti has 2 GB of GDDR5 memory, with a 1,502 MHz memory clock and a 192 bit interface. This gives it a memory bandwidth of 144.2 Gb/s, which affects how fast it can transfer data to and from memory. GPU memory stores temporary data that helps the GPU with complex math and graphics operations. More memory is generally better, as not having enough can cause performance bottlenecks.
Cores and Clock Speeds
The GTX 660 Ti includes 1,344 CUDA cores, the processing units for handling parallel computing tasks. The GPU operates at a core clock speed of 915 MHz and can dynamically boost its clock speed up to 980 MHz. Complementing the processing units are 112 texture mapping units (TMUs) for efficient texture filtering and 24 render output units (ROPs) for pixel processing.
Compatibility & Power Consumption
The GTX 660 Ti occupies 2 PCIe expansion slots. It supports DVI, HDMI 1.4a, DisplayPort 1.2 display connections. NVIDIA recommends a power supply of at least 450 W to handle the GPU's thermal design power (TDP) of 150 W.
Benchmark Performance & Value
The GTX 660 Ti has the 197th best 3DMark 11 Performance GPU score among the 543 benchmarked GPUs in our database. It achieves 8.03% of the performance of the best benchmarked GPU, the NVIDIA GeForce RTX 4090. Its 8,415 score and $299 launch price (MSRP) gives it a performance per dollar of 28.14. This is the 81st best in value for the 3DMark 11 Performance GPU benchmark.
General Info
General overview of the GPU, including details like its manufacturer, release date, launch price, and current production status.
| Info | Radeon RX 6900 XT | GeForce GTX 660 Ti |
|---|---|---|
| Manufacturer | AMD | NVIDIA |
| Architecture | RDNA 2.0 | Kepler |
| Market Segment | Desktop | Desktop |
| Release Date | Q4 2020 | Q3 2012 |
| Launch Price (MSRP) | $999 | $299 |
| Production Status | Active | End-of-life |
| Shop | Check Price | Check Price |
Gaming Performance
Select a game to compare FPS metrics
FPS Benchmarks
This table showcases the average frame rate (FPS) achieved both GPUs in at various resolutions. Frame rate is a crucial indicator of how smoothly the GPU can run the game. A higher FPS generally translates to a smoother gameplay experience.
- Frames Per Second
Hitman 3 | Radeon RX 6900 XT | GeForce GTX 660 Ti |
|---|---|---|
| Low - 720p | 353 FPS | -- |
| Medium - 1080p | 283 FPS | -- |
| High - 1080p | 280 FPS | -- |
| Ultra - 1080p | 273 FPS | -- |
| QHD - 1440p | 213 FPS | -- |
| 4K UHD - 2160p | 128 FPS | -- |
Compare Frames Per Second (FPS)
The average frame rate (FPS) in can be compared to similar GPUs to assess relative performance. Generally, higher FPS results in a smoother gameplay experience.
| GPU | Frames Per Second | |
|---|---|---|
| Radeon RX 6900 XT | 128 | |
| GeForce RTX 3080 Ti | 119.6 | -7% |
| GeForce RTX 3090 | 119 | -7% |
| GeForce RTX 3080 | 109 | -15% |
| GeForce RTX 2080 Ti | 85.2 | -33% |
| GeForce RTX 3070 | 77.5 | -39% |
| GeForce RTX 2080 | 65.3 | -49% |
| GeForce RTX 2080 SUPER | 64 | -50% |
| Radeon RX 6600 XT | 57 | -55% |
Compare Cost Per Frame
The average cost per frame in can be compared to similar GPUs to assess relative value. Generally, a lower cost per frame implies better value for your money.
| GPU | Cost Per Frame | |
|---|---|---|
| GeForce RTX 3080 | 6.41 | -18% |
| GeForce RTX 3070 | 6.44 | -18% |
| Radeon RX 6600 XT | 6.65 | -15% |
| Radeon RX 6900 XT | 7.8 | |
| GeForce RTX 3080 Ti | 10.03 | +28% |
| GeForce RTX 2080 | 10.7 | +37% |
| GeForce RTX 2080 SUPER | 10.92 | +40% |
| GeForce RTX 2080 Ti | 11.73 | +50% |
| GeForce RTX 3090 | 12.6 | +61% |
Benchmark Performance
The Radeon RX 6900 XT has 603% better performance than the GeForce GTX 660 Ti for the 3DMark 11 Performance GPU benchmark.
The Radeon RX 6900 XT is ranked 18th with a score of 59,119, and the GeForce GTX 660 Ti is ranked 197th with a score of 8,415.
The Radeon RX 6900 XT has 110% better value for the money than the GeForce GTX 660 Ti for the 3DMark 11 Performance GPU benchmark.
The Radeon RX 6900 XT is ranked 55th with a performance per dollar of 59.18, and the GeForce GTX 660 Ti is ranked 81st with a performance per dollar of 28.14.
Relative Performance
The average score in the benchmark test can be compared to similar GPUs to assess relative performance. Generally, powerful GPUs tend to have higher scores.
| GPU | Benchmark Performance | |
|---|---|---|
| GeForce RTX 3080 Ti | 60,980 | +3% |
| GeForce RTX 4070 | 59,969 | +1% |
| Radeon RX 6900 XT | 59,119 | |
| Radeon RX 7700 XT | 57,340 | -3% |
| GeForce RTX 3080 (12 GB) | 56,634 | -4% |
| GeForce GTX 1050 | 8,571 | -86% |
| Radeon R7 370 | 8,518.5 | -86% |
| GeForce GTX 660 Ti | 8,415 | -86% |
| GeForce GTX 950 | 8,351 | -86% |
| GeForce GTX 760 | 7,962 | -87% |
Relative Value For Money
The average performance per dollar in the benchmark test can be compared to similar GPUs to assess relative value. A higher score implies a better value for your money.
| GPU | Performance Per Dollar | |
|---|---|---|
| Radeon RX 6950 XT | 65.72 | +11% |
| GeForce RTX 4090 | 65.5 | +11% |
| Radeon RX 6900 XT | 59.18 | |
| GeForce RTX 2080 SUPER | 58.6 | -1% |
| GeForce RTX 2080 | 57.62 | -3% |
| Radeon R9 FURY | 31.95 | -46% |
| Radeon R9 290X | 29.45 | -50% |
| GeForce GTX 660 Ti | 28.14 | -52% |
| Radeon R9 Nano | 26.63 | -55% |
| GeForce GTX 780 Ti | 22.34 | -62% |
Benchmark Scores
This table showcases the average performance scores achieved by both GPUs across industry-standard benchmark tests. These scores provide a valuable insight into overall performance. Powerful GPUs tend to have higher scores.
- Popular
| Benchmark | Radeon RX 6900 XT | GeForce GTX 660 Ti |
|---|---|---|
| 3DMark Time Spy Graphics | 18,210 | -- |
| 3DMark Time Spy Score | 17,549 | -- |
| 3DMark Cloud Gate Graphics | -- | 37,758 |
| 3DMark Fire Strike Standard Graphics | 50,587 (+831.28%) | 5,432 |
| 3DMark Night Raid Graphics | 160,895 | -- |
| 3DMark 11 Performance Score | 42,418 (+451.38%) | 7,693 |
| PassMark G3D Mark | 26,838 (+506.92%) | 4,422 |
| PassMark G2D Mark | 1,050 (+125.32%) | 466 |
| Unigine Heaven 3.0 DirectX 11 | -- | 78.7 |
Technical Specs
Graphics Processor
General information about the graphics processing unit like their architecture, manufacturing process size, and transistor count. Newer GPU architectures generally bring efficiency improvements and may introduce technologies that enhance graphical capabilities.
| Spec | Radeon RX 6900 XT | GeForce GTX 660 Ti |
|---|---|---|
| Codename | Navi 21 | GK104 |
| Architecture | RDNA 2.0 | Kepler |
| Process Size | 7 nm | 28 nm |
| Transistors | 26,800 million | 3,540 million |
Memory Details
Memory specifications like their capacity, bandwidth, and clock speeds. GPU memory stores graphics data like frames, textures, and shadows which helps display rendered images. These specs are crucial for graphics-intense applications like gaming and 3D modeling.
| Spec | Radeon RX 6900 XT | GeForce GTX 660 Ti |
|---|---|---|
| Memory Size | 16 GB | 2 GB |
| Memory Type | GDDR6 | GDDR5 |
| Memory Bandwidth | 512 Gb/s | 144.2 Gb/s |
| Memory Clock | 2,000 MHz | 1,502 MHz |
| Memory Interface | 256 bit | 192 bit |
| L1 Cache | 128 KB | 16 KB |
| L2 Cache | 4 MB | 384 KB |
Board Compatibility
Compatibility information like their slot size, bus interface, power consumption, and display support. These specs are useful for verifying compatibility with your motherboard, power supply, and monitor.
| Spec | Radeon RX 6900 XT | GeForce GTX 660 Ti |
|---|---|---|
| Slots | 3 slots | 2 slots |
| Bus Interface | PCIe 4.0 x16 | PCIe 3.0 x16 |
| Thermal Design Power (TDP) | 300 W | 150 W |
| Suggested PSU | 700 W | 450 W |
| Power Connectors | 2x 8-pin | 2x 6-pin |
| Outputs | HDMI 2.1, DisplayPort 1.4a, USB Type-C | DVI, HDMI 1.4a, DisplayPort 1.2 |
Cores & Clock Speeds
Processing power information like its cores and clock speed. These specs impact how fast they can process graphics. Each type of core or component serves a specific computational purpose.
| Spec | Radeon RX 6900 XT | GeForce GTX 660 Ti |
|---|---|---|
| Stream Processors (SP) | 5,120 | -- |
| CUDA Cores | -- | 1,344 |
| Compute Units (CU) | 80 | -- |
| Stream Multiprocessors (SM) | -- | 7 |
| Texture Mapping Units (TMU) | 320 | 112 |
| Render Output Units (ROP) | 128 | 24 |
| Ray Accelerators | 80 | -- |
| Core Clock Speed | 1,825 MHz | 915 MHz |
| Core Clock Speed (Boost) | 2,250 MHz | 980 MHz |
| Core Clock Speed (Game) | 2,015 MHz | -- |
Theoretical Performance
Theoretical performance numbers derived from the raw specifications of the different components like core count and clock speeds. While these provide a glimpse into peak processing power, they do not represent real-world performance.
| Spec | Radeon RX 6900 XT | GeForce GTX 660 Ti |
|---|---|---|
| Pixel Fill Rate | 288 GPixel/s | 27.44 GPixel/s |
| Texture Fill Rate | 720 GTexel/s | 109.8 GTexel/s |
| FP32 Performance | 23.04 TFLOPS | 2.63 TFLOPS |
| FP64 Performance | 1,440 GFLOPS | 109.8 GFLOPS |
API Support
Graphics API versions supported by these graphics cards. APIs evolve over time, introducing new features and functionalities. Older GPUs may not support recent versions.
| Spec | Radeon RX 6900 XT | GeForce GTX 660 Ti |
|---|---|---|
| DirectX | 12 Ultimate (12_2) | 12 (11_0) |
| OpenCL | 2.1 | 3.0 |
| OpenGL | 4.6 | 4.6 |
| Shader Model | 6.8 | 6.5 (5.1) |
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* Performance rating, performance per dollar, and rankings are based on the 3DMark 11 Performance GPU benchmark and MSRP.