Contents:HighlightsSummaryGaming PerformanceBenchmark PerformanceTechnical SpecsRelated ComparisonsRelated GPUs
Performance
GeForce GT 645M
1,844.52% of 104,598
Radeon RX 6800 XT2,722% better
52,04650% of 104,598
The Radeon RX 6800 XT has 2,722% better performance than the GeForce GT 645M for the 3DMark 11 Performance GPU benchmark.
Performance per dollar
GeForce GT 645M
No data available
Radeon RX 6800 XT
80.1950% of 161.45
The Radeon RX 6800 XT has 50% of the performance per dollar compared to the leader for the 3DMark 11 Performance GPU benchmark: AMD Radeon RX 7600.
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Summary
#
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 372nd best 3DMark 11 Performance GPU score among the 543 benchmarked GPUs in our database. It achieves 1.76% of the performance of the best benchmarked GPU, the NVIDIA GeForce RTX 4090.
About the AMD Radeon RX 6800 XT GPU
The AMD Radeon RX 6800 XT is a desktop graphics card that launched in Q4 2020 with a MSRP of $649. 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 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 6800 XT includes 4,608 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 288 texture mapping units (TMUs) for efficient texture filtering and 128 render output units (ROPs) for pixel processing. Additionally, the GPU features 72 ray accelerators dedicated to real-time ray tracing calculations.
Compatibility & Power Consumption
The RX 6800 XT 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 700 W to handle the GPU's thermal design power (TDP) of 300 W.
Benchmark Performance & Value
The RX 6800 XT has the 25th best 3DMark 11 Performance GPU score among the 543 benchmarked GPUs in our database. It achieves 49.76% of the performance of the best benchmarked GPU, the NVIDIA GeForce RTX 4090. Its 52,046 score and $649 launch price (MSRP) gives it a performance per dollar of 80.19. This is the 36th 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 | GeForce GT 645M | Radeon RX 6800 XT |
|---|---|---|
| Manufacturer | NVIDIA | AMD |
| Architecture | Kepler | RDNA 2.0 |
| Market Segment | Mobile | Desktop |
| Release Date | Q4 2012 | Q4 2020 |
| Launch Price (MSRP) | -- | $649 |
| Production Status | End-of-life | Active |
| Shop | Check Price | Check Price |
Gaming Performance
#
Select a game to compare FPS metrics
Crysis Remastered
Call of Duty: Black Ops Cold War
Yakuza: Like a Dragon
Assassin's Creed Valhalla
DIRT 5
Watch Dogs: Legion
FIFA 21
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
Crysis Remastered | GeForce GT 645M | Radeon RX 6800 XT |
|---|---|---|
| Low - 720p | -- | 321 FPS |
| Medium - 1080p | -- | 248 FPS |
| High - 1080p | -- | 152 FPS |
| Ultra - 1080p | -- | 95 FPS |
| QHD - 1440p | -- | 84 FPS |
| 4K UHD - 2160p | -- | 54 FPS |
FPS Source: Notebookcheck
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.
Choose Baseline GPU:GeForce GT 645M orRadeon RX 6800 XT
| GPU | Frames Per Second | |
|---|---|---|
| GeForce RTX 3080 (12 GB) | 72.7 | +34% |
| Radeon RX 6950 XT | 72.4 | +33% |
| GeForce RTX 3090 | 63 | +16% |
| Radeon RX 6800 XT | 54.4 | |
| GeForce RTX 3080 | 49.2 | -10% |
| GeForce RTX 3060 Ti | 44.4 | -18% |
| GeForce RTX 3070 | 38.9 | -28% |
| GeForce RTX 2080 Ti | 37.6 | -31% |
| Radeon VII | 30.7 | -44% |
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.
Choose Baseline GPU:GeForce GT 645M orRadeon RX 6800 XT
| GPU | Cost Per Frame | |
|---|---|---|
| GeForce RTX 3060 Ti | 8.99 | -25% |
| GeForce RTX 3080 (12 GB) | 10.99 | -8% |
| Radeon RX 6800 XT | 11.93 | |
| GeForce RTX 3070 | 12.83 | +8% |
| GeForce RTX 3080 | 14.21 | +19% |
| Radeon RX 5700 XT | 14.25 | +19% |
| GeForce RTX 3060 | 14.49 | +21% |
| Radeon RX 6950 XT | 15.18 | +27% |
| Radeon RX 6800 | 19.3 | +62% |
Benchmark Performance
#
Performance
GeForce GT 645M
1,844.52% of 104,598
Radeon RX 6800 XT2,722% better
52,04650% of 104,598
The Radeon RX 6800 XT has 2,722% better performance than the GeForce GT 645M for the 3DMark 11 Performance GPU benchmark.
The GeForce GT 645M is ranked 372nd with a score of 1,844.5, and the Radeon RX 6800 XT is ranked 25th with a score of 52,046.
Performance per dollar
GeForce GT 645M
No data available
Radeon RX 6800 XT
80.1950% of 161.45
The Radeon RX 6800 XT has 123% of the performance per dollar compared to the leader for the 3DMark 11 Performance GPU benchmark: NVIDIA GeForce RTX 4090.
Radeon RX 6800 XT's 80.19 performance per dollar ranks it 0th 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.
Choose Baseline GPU:GeForce GT 645M or
| GPU | Benchmark Performance | |
|---|---|---|
| Radeon RX 6800 | 55,084 | +2,886% |
| GeForce RTX 3080 | 53,713 | +2,812% |
| Radeon RX 6800 XT | 52,046 | +2,722% |
| GeForce RTX 3070 Ti | 49,760 | +2,598% |
| GeForce RTX 4060 Ti (8 GB) | 47,803 | +2,492% |
| Radeon R7 M270 | 1,857.5 | +1% |
| GeForce GT 740M | 1,848 | +0% |
| GeForce GT 645M | 1,844.5 | |
| GeForce 920MX | 1,835 | -1% |
| Quadro K1100M | 1,826.5 | -1% |
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.
Choose Baseline GPU:GeForce GT 645M orRadeon RX 6800 XT
| GPU | Performance Per Dollar | |
|---|---|---|
| GeForce RTX 3060 | 86.25 | +8% |
| GeForce RTX 3070 | 86.18 | +7% |
| Radeon RX 7900 XT | 84.42 | +5% |
| Radeon RX 7900 XTX | 83.41 | +4% |
| GeForce RTX 3070 Ti | 83.07 | +4% |
| Radeon RX 6800 XT | 80.19 | |
| GeForce RTX 3080 | 76.84 | -4% |
| GeForce RTX 4080 | 71.95 | -10% |
| GeForce RTX 3080 (12 GB) | 70.88 | -12% |
| Radeon RX 6950 XT | 65.72 | -18% |
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 | GeForce GT 645M | Radeon RX 6800 XT |
|---|---|---|
| 3DMark Time Spy Graphics | -- | 17,603 |
| 3DMark Time Spy Score | -- | 16,908 |
| 3DMark Cloud Gate Graphics | 8,654.5 | 193,053 (+2,130.67%) |
| 3DMark Fire Strike Standard Graphics | 1,151.5 | 49,735 (+4,219.15%) |
| 3DMark 11 Performance Score | 1,962.5 | 38,057 (+1,839.21%) |
| Cinebench R15 OpenGL 64 Bit | -- | 268.1 |
| PassMark G3D Mark | 934 | 25,032 (+2,580.09%) |
| PassMark G2D Mark | 158 | 1,009 (+538.61%) |
| Unigine Heaven 3.0 DirectX 11 | 17.7 | -- |
Benchmarks Source: Notebookcheck
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 | GeForce GT 645M | Radeon RX 6800 XT |
|---|---|---|
| Codename | GK107 | Navi 21 |
| Architecture | Kepler | RDNA 2.0 |
| Process Size | 28 nm | 7 nm |
| Transistors | 1,270 million | 26,800 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 | GeForce GT 645M | Radeon RX 6800 XT |
|---|---|---|
| Memory Size | 2 GB | 16 GB |
| Memory Type | DDR3 | GDDR6 |
| Memory Bandwidth | 28.8 Gb/s | 512 Gb/s |
| Memory Clock | 900 MHz | 2,000 MHz |
| Memory Interface | 128 bit | 256 bit |
| L1 Cache | 16 KB | 128 KB |
| L2 Cache | 256 KB | 4 MB |
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 | GeForce GT 645M | Radeon RX 6800 XT |
|---|---|---|
| Slots | -- | 2 slots |
| Bus Interface | PCIe 3.0 x16 | PCIe 4.0 x16 |
| Thermal Design Power (TDP) | 32 W | 300 W |
| Suggested PSU | -- | 700 W |
| Power Connectors | -- | 2x 8-pin |
| Outputs | Device Dependent | HDMI 2.1, DisplayPort 1.4a, USB Type-C |
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 | GeForce GT 645M | Radeon RX 6800 XT |
|---|---|---|
| Stream Processors (SP) | -- | 4,608 |
| CUDA Cores | 384 | -- |
| Compute Units (CU) | -- | 72 |
| Stream Multiprocessors (SM) | 2 | -- |
| Texture Mapping Units (TMU) | 32 | 288 |
| Render Output Units (ROP) | 16 | 128 |
| Ray Accelerators | -- | 72 |
| Core Clock Speed | 709 MHz | 1,825 MHz |
| Core Clock Speed (Boost) | 780 MHz | 2,250 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 | GeForce GT 645M | Radeon RX 6800 XT |
|---|---|---|
| Pixel Fill Rate | 6.24 GPixel/s | 288 GPixel/s |
| Texture Fill Rate | 24.96 GTexel/s | 648 GTexel/s |
| FP32 Performance | 599 GFLOPS | 20.74 TFLOPS |
| FP64 Performance | 24.96 GFLOPS | 1,296 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 | GeForce GT 645M | Radeon RX 6800 XT |
|---|---|---|
| DirectX | 12 (11_0) | 12 Ultimate (12_2) |
| OpenCL | 3.0 | 2.1 |
| OpenGL | 4.6 | 4.6 |
| Shader Model | 6.5 (5.1) | 6.8 |
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* Performance rating, performance per dollar, and rankings are based on the 3DMark 11 Performance GPU benchmark and MSRP.