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GPU Comparison
AMD Radeon Sky 500 vs NVIDIA GeForce GTX 645 OEM
AMD Radeon Sky 500 vs NVIDIA GeForce GTX 645 OEM
VS
AMD Radeon Sky 500
NVIDIA GeForce GTX 645 OEM
We compared two Desktop platform GPUs: 4GB VRAM Radeon Sky 500 and 1024MB VRAM GeForce GTX 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon Sky 500 's Advantages
More VRAM (4GB vs 1GB)
Larger VRAM bandwidth (153.6GB/s vs 64.00GB/s)
704 additional rendering cores
NVIDIA GeForce GTX 645 OEM 's Advantages
Lower TDP (65W vs 150W)
Score
Benchmark
FP32 (float)
Radeon Sky 500
+156%
2.432 TFLOPS
GeForce GTX 645 OEM
0.949 TFLOPS
Radeon Sky 500
VS
GeForce GTX 645 OEM
Graphics Card
Mar 2013
Release Date
Apr 2013
Radeon Sky
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1200 MHz
Memory Clock
1000 MHz
Memory
4GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
153.6GB/s
Bandwidth
64.00GB/s
Render Config
-
SM Count
-
20
Compute Units
-
1280
Shading Units
576
80
TMUs
48
32
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per SMX)
512 KB
L2 Cache
256 KB
Theoretical Performance
30.40 GPixel/s
Pixel Rate
9.888 GPixel/s
76.00 GTexel/s
Texture Rate
39.55 GTexel/s
-
FP16 (half)
-
2.432 TFLOPS
FP32 (float)
949.2 GFLOPS
152.0 GFLOPS
FP64 (double)
39.55 GFLOPS
Graphics Processor
Pitcairn
GPU Name
GK106
Pitcairn XT GL (215-0828073)
GPU Variant
GK106-200-A1
GCN 1.0
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
2.8 billion
Transistors
2.54 billion
212 mm²
Die Size
221 mm²
Board Design
150W
TDP
65W
450 W
Suggested PSU
250 W
1x DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
1x 6-pin
Power Connectors
None
Graphics Features
12 (11_1)
DirectX
12 (11_0)
4.6
OpenGL
4.6
1.2
OpenCL
3.0
1.2
Vulkan
1.1
-
CUDA
3.0
5.1
Shader Model
5.1
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