AMD Radeon RX 6800 vs NVIDIA GeForce GT 645M
The Radeon RX 6800 has 3,033% better performance than the GeForce GT 645M for the 3DMark 11 Performance GPU benchmark.
The Radeon RX 6800 has 60% of the performance per dollar compared to the leader for the 3DMark 11 Performance GPU benchmark: AMD Radeon RX 9070 XT.
Summary
About the AMD Radeon RX 6800 GPU
The AMD Radeon RX 6800 is a desktop graphics card that launched in Q4 2020 with a MSRP of $579. It is built on the RDNA 2.0 GPU microarchitecture (codename Navi 21) and is manufactured on a 7 nm process.
Memory
The RX 6800 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 6800 includes 3,840 stream processors (SPs), the processing units for handling parallel computing tasks. The GPU operates at a core clock speed of 1,700 MHz and can dynamically boost its clock speed up to 2,105 MHz. It usually operates at 1,815 MHz during typical gaming workloads. Complementing the processing units are 240 texture mapping units (TMUs) for efficient texture filtering and 96 render output units (ROPs) for pixel processing. Additionally, the GPU features 60 ray accelerators dedicated to real-time ray tracing calculations.
Compatibility & Power Consumption
The RX 6800 occupies 2 PCIe expansion slots. It supports HDMI 2.1, DisplayPort 1.4a, USB Type-C display connections. AMD recommends a power supply of at least 600 W to handle the GPU's thermal design power (TDP) of 250 W.
Benchmark Performance & Value
The RX 6800 has the 27th best 3DMark 11 Performance GPU score among the 567 benchmarked GPUs in our database. It achieves 44.53% of the performance of the best benchmarked GPU, the NVIDIA GeForce RTX 5090. Its 57,784 score and $579 launch price (MSRP) gives it a performance per dollar of 99.8. This is the 25th best in value for the 3DMark 11 Performance GPU benchmark.
About the NVIDIA GeForce GT 645M GPU
The NVIDIA GeForce GT 645M is an end-of-life mobile graphics card that released in Q4 2012. It is built on the Kepler GPU microarchitecture (codename GK107) and is manufactured on a 28 nm process.
Memory
The GT 645M has 2 GB of DDR3 memory, with a 900 MHz memory clock and a 128 bit interface. This gives it a memory bandwidth of 28.8 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 GT 645M includes 384 CUDA cores, the processing units for handling parallel computing tasks. The GPU operates at a core clock speed of 709 MHz and can dynamically boost its clock speed up to 780 MHz. Complementing the processing units are 32 texture mapping units (TMUs) for efficient texture filtering and 16 render output units (ROPs) for pixel processing.
Compatibility & Power Consumption
The GPU has a thermal design power (TDP) of 32 W. A power supply not strong enough to handle this might result in system crashes and potentially damage your hardware.
Benchmark Performance
The GT 645M has the 396th best 3DMark 11 Performance GPU score among the 567 benchmarked GPUs in our database. It achieves 1.42% of the performance of the best benchmarked GPU, the NVIDIA GeForce RTX 5090.
General Info
General overview of the GPU, including details like its manufacturer, release date, launch price, and current production status.
| Info | Radeon RX 6800 | GeForce GT 645M |
|---|---|---|
| Manufacturer | AMD | NVIDIA |
| Architecture | RDNA 2.0 | Kepler |
| Market Segment | Desktop | Mobile |
| Release Date | Q4 2020 | Q4 2012 |
| Launch Price (MSRP) | $579 | -- |
| 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
F1 24 | Radeon RX 6800 | GeForce GT 645M |
|---|---|---|
| Low - 1080p | 415 FPS | -- |
| Medium - 1080p | 357 FPS | -- |
| High - 1080p | 268 FPS | -- |
| Ultra - 1080p | 66 FPS | -- |
| QHD - 1440p | 42 FPS | -- |
| 4K UHD - 2160p | 21 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 | |
|---|---|---|
| GeForce RTX 3070 Ti | 28 | +36% |
| Arc B580 | 24.6 | +19% |
| GeForce RTX 4060 Ti (8 GB) | 24 | +17% |
| GeForce RTX 3060 Ti | 22.2 | +8% |
| Arc A770 | 21 | +2% |
| Radeon RX 6800 | 20.6 | |
| GeForce RTX 5060 | 20 | -3% |
| GeForce RTX 4060 | 19 | -8% |
| GeForce RTX 3060 | 18 | -13% |
| Arc A750 | 16.8 | -18% |
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 3060 | 18.28 | -35% |
| Radeon RX 7900 XTX | 20.39 | -27% |
| GeForce RTX 3070 Ti | 21.39 | -24% |
| GeForce RTX 4080 | 21.8 | -22% |
| Radeon RX 7900 XT | 22.48 | -20% |
| Radeon RX 6800 | 28.11 | |
| Radeon RX 7600 | 32.8 | +17% |
| GeForce RTX 3090 | 35.69 | +27% |
| Radeon RX 6950 XT | 36.39 | +29% |
Benchmark Performance
The Radeon RX 6800 has 3,033% better performance than the GeForce GT 645M for the 3DMark 11 Performance GPU benchmark.
The Radeon RX 6800 is ranked 27th with a score of 57,784, and the GeForce GT 645M is ranked 396th with a score of 1,844.5.
The Radeon RX 6800 has 154% of the performance per dollar compared to the leader for the 3DMark 11 Performance GPU benchmark: NVIDIA GeForce RTX 5090.
Radeon RX 6800's 99.8 performance per dollar ranks it 25th among the other benchmarked GPUs in our database.
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 4070 | 59,986 | +4% |
| Radeon RX 6900 XT | 59,119 | +2% |
| Radeon RX 6800 | 57,784 | |
| Radeon RX 7700 XT | 57,340 | -1% |
| GeForce RTX 3080 (12 GB) | 56,634 | -2% |
| Radeon R7 M270 | 1,857.5 | -97% |
| GeForce GT 740M | 1,848 | -97% |
| GeForce GT 645M | 1,844.5 | -97% |
| GeForce 920MX | 1,835 | -97% |
| Quadro K1100M | 1,826.5 | -97% |
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 | |
|---|---|---|
| Arc A770 | 119.31 | +20% |
| GeForce RTX 5070 Ti | 114.57 | +15% |
| GeForce RTX 4070 SUPER | 114.15 | +14% |
| Radeon RX 6600 XT | 103.04 | +3% |
| GeForce RTX 4070 | 100.14 | +0% |
| Radeon RX 6800 | 99.8 | |
| GeForce RTX 3060 Ti | 95.09 | -5% |
| GeForce RTX 4070 Ti | 94.63 | -5% |
| GeForce RTX 4070 Ti SUPER | 93.66 | -6% |
| Radeon RX 5700 XT | 89.78 | -10% |
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 6800 | GeForce GT 645M |
|---|---|---|
| 3DMark Time Spy Graphics | 16,242 | -- |
| 3DMark Time Spy Score | 16,235 | -- |
| 3DMark Cloud Gate Graphics | 197,365 (+2,180.49%) | 8,654.5 |
| 3DMark Fire Strike Standard Graphics | 44,613.5 (+3,774.38%) | 1,151.5 |
| 3DMark Night Raid Graphics | 177,472 | -- |
| 3DMark 11 Performance Score | 46,167 (+2,252.46%) | 1,962.5 |
| PassMark G3D Mark | 22,111 (+2,252.23%) | 940 |
| PassMark G2D Mark | 994 (+498.8%) | 166 |
| Unigine Heaven 3.0 DirectX 11 | -- | 17.7 |
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 6800 | GeForce GT 645M |
|---|---|---|
| Codename | Navi 21 | GK107 |
| Architecture | RDNA 2.0 | Kepler |
| Process Size | 7 nm | 28 nm |
| Transistors | 26,800 million | 1,270 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 6800 | GeForce GT 645M |
|---|---|---|
| Memory Size | 16 GB | 2 GB |
| Memory Type | GDDR6 | DDR3 |
| Memory Bandwidth | 512 Gb/s | 28.8 Gb/s |
| Memory Clock | 2,000 MHz | 900 MHz |
| Memory Interface | 256 bit | 128 bit |
| L1 Cache | 128 KB | 16 KB |
| L2 Cache | 4 MB | 256 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 6800 | GeForce GT 645M |
|---|---|---|
| Slots | 2 slots | -- |
| Bus Interface | PCIe 4.0 x16 | PCIe 3.0 x16 |
| Thermal Design Power (TDP) | 250 W | 32 W |
| Suggested PSU | 600 W | -- |
| Power Connectors | 2x 8-pin | -- |
| Outputs | HDMI 2.1, DisplayPort 1.4a, USB Type-C | Device Dependent |
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 6800 | GeForce GT 645M |
|---|---|---|
| Stream Processors (SP) | 3,840 | -- |
| CUDA Cores | -- | 384 |
| Compute Units (CU) | 60 | -- |
| Stream Multiprocessors (SM) | -- | 2 |
| Texture Mapping Units (TMU) | 240 | 32 |
| Render Output Units (ROP) | 96 | 16 |
| Ray Accelerators | 60 | -- |
| Core Clock Speed | 1,700 MHz | 709 MHz |
| Core Clock Speed (Boost) | 2,105 MHz | 780 MHz |
| Core Clock Speed (Game) | 1,815 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 6800 | GeForce GT 645M |
|---|---|---|
| Pixel Fill Rate | 202.1 GPixel/s | 6.24 GPixel/s |
| Texture Fill Rate | 505.2 GTexel/s | 24.96 GTexel/s |
| FP32 Performance | 16.17 TFLOPS | 599 GFLOPS |
| FP64 Performance | 1,010.4 GFLOPS | 24.96 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 6800 | GeForce GT 645M |
|---|---|---|
| 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.