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GPU Comparison
AMD Radeon HD 7970 vs NVIDIA GeForce GTX 645 OEM
AMD Radeon HD 7970 vs NVIDIA GeForce GTX 645 OEM
VS
AMD Radeon HD 7970
NVIDIA GeForce GTX 645 OEM
We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 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 HD 7970 's Advantages
More VRAM (3GB vs 1GB)
Larger VRAM bandwidth (264.0GB/s vs 64.00GB/s)
1472 additional rendering cores
NVIDIA GeForce GTX 645 OEM 's Advantages
Released 1 years and 4 months late
Lower TDP (65W vs 250W)
Score
Benchmark
FP32 (float)
Radeon HD 7970
+299%
3.789 TFLOPS
GeForce GTX 645 OEM
0.949 TFLOPS
Radeon HD 7970
VS
GeForce GTX 645 OEM
Graphics Card
Dec 2011
Release Date
Apr 2013
Southern Islands
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1375 MHz
Memory Clock
1000 MHz
Memory
3GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
128bit
264.0GB/s
Bandwidth
64.00GB/s
Render Config
-
SM Count
-
32
Compute Units
-
2048
Shading Units
576
128
TMUs
48
32
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per SMX)
768 KB
L2 Cache
256 KB
Theoretical Performance
29.60 GPixel/s
Pixel Rate
9.888 GPixel/s
118.4 GTexel/s
Texture Rate
39.55 GTexel/s
-
FP16 (half)
-
3.789 TFLOPS
FP32 (float)
949.2 GFLOPS
947.2 GFLOPS
FP64 (double)
39.55 GFLOPS
Graphics Processor
Tahiti
GPU Name
GK106
Tahiti XT (215-0821060)
GPU Variant
GK106-200-A1
GCN 1.0
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
4.313 billion
Transistors
2.54 billion
352 mm²
Die Size
221 mm²
Board Design
250W
TDP
65W
600 W
Suggested PSU
250 W
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
1x 6-pin + 1x 8-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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