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GPU Comparison
NVIDIA GeForce GT 640 OEM Rebrand vs AMD Radeon HD 7770 GHz Edition
NVIDIA GeForce GT 640 OEM Rebrand vs AMD Radeon HD 7770 GHz Edition
VS
NVIDIA GeForce GT 640 OEM Rebrand
AMD Radeon HD 7770 GHz Edition
We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand and 1024MB VRAM Radeon HD 7770 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GT 640 OEM Rebrand 's Advantages
More VRAM (1536GB vs 1024GB)
Lower TDP (75W vs 80W)
AMD Radeon HD 7770 GHz Edition 's Advantages
Larger VRAM bandwidth (72.00GB/s vs 38.40GB/s)
496 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce GT 640 OEM Rebrand
0.415 TFLOPS
Radeon HD 7770 GHz Edition
+208%
1.28 TFLOPS
GeForce GT 640 OEM Rebrand
VS
Radeon HD 7770 GHz Edition
Graphics Card
Apr 2012
Release Date
Feb 2012
GeForce 600
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
800 MHz
Memory Clock
1125 MHz
Memory
1536MB
Memory Size
1024MB
DDR3
Memory Type
GDDR5
192bit
Memory Bus
128bit
38.40GB/s
Bandwidth
72.00GB/s
Render Config
3
SM Count
-
-
Compute Units
10
144
Shading Units
640
24
TMUs
40
24
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
64 KB (per SM)
L1 Cache
16 KB (per CU)
384 KB
L2 Cache
256 KB
Theoretical Performance
4.320 GPixel/s
Pixel Rate
16.00 GPixel/s
17.28 GTexel/s
Texture Rate
40.00 GTexel/s
-
FP16 (half)
-
414.7 GFLOPS
FP32 (float)
1280 GFLOPS
34.56 GFLOPS
FP64 (double)
80.00 GFLOPS
Graphics Processor
GF116
GPU Name
Cape Verde
GF116-150-A1
GPU Variant
Cape Verde XT
Fermi 2.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
1.17 billion
Transistors
1.5 billion
238 mm²
Die Size
123 mm²
Board Design
75W
TDP
80W
250 W
Suggested PSU
250 W
2x DVI 1x mini-HDMI 1.3a
Outputs
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
None
Power Connectors
1x 6-pin
Graphics Features
12 (11_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
1.1
OpenCL
1.2
N/A
Vulkan
1.2
2.1
CUDA
-
5.1
Shader Model
5.1
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