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GPU Comparison
NVIDIA GeForce GTX 780 Ti vs NVIDIA GeForce GT 640 Rev. 2
NVIDIA GeForce GTX 780 Ti vs NVIDIA GeForce GT 640 Rev. 2
VS
NVIDIA GeForce GTX 780 Ti
NVIDIA GeForce GT 640 Rev. 2
We compared two Desktop platform GPUs: 3GB VRAM GeForce GTX 780 Ti and 1024MB VRAM GeForce GT 640 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GTX 780 Ti 's Advantages
Released 6 months late
Boost Clock928MHz
More VRAM (3GB vs 1GB)
Larger VRAM bandwidth (336.6GB/s vs 40.06GB/s)
2496 additional rendering cores
NVIDIA GeForce GT 640 Rev. 2 's Advantages
Lower TDP (49W vs 250W)
Score
Benchmark
FP32 (float)
GeForce GTX 780 Ti
+565%
5.345 TFLOPS
GeForce GT 640 Rev. 2
0.803 TFLOPS
GeForce GTX 780 Ti
VS
GeForce GT 640 Rev. 2
Graphics Card
Nov 2013
Release Date
May 2013
GeForce 700
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x8
Clock Speeds
875 MHz
Base Clock
-
928 MHz
Boost Clock
-
1753 MHz
Memory Clock
1252 MHz
Memory
3GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
64bit
336.6GB/s
Bandwidth
40.06GB/s
Render Config
-
SM Count
-
-
Compute Units
-
2880
Shading Units
384
240
TMUs
32
48
ROPs
8
-
Tensor Cores
-
-
RT Cores
-
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
1536 KB
L2 Cache
512 KB
Theoretical Performance
55.68 GPixel/s
Pixel Rate
8.368 GPixel/s
222.7 GTexel/s
Texture Rate
33.47 GTexel/s
-
FP16 (half)
-
5.345 TFLOPS
FP32 (float)
803.3 GFLOPS
222.7 GFLOPS
FP64 (double)
33.47 GFLOPS
Graphics Processor
GK110B
GPU Name
GK208
GK110-425-B1
GPU Variant
GK208-400-A1
Kepler
Architecture
Kepler 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
7.08 billion
Transistors
1.02 billion
561 mm²
Die Size
87 mm²
Board Design
250W
TDP
49W
600 W
Suggested PSU
200 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.4a 1x VGA
1x 6-pin + 1x 8-pin
Power Connectors
None
Graphics Features
12 (11_1)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.1
3.5
CUDA
3.5
5.1
Shader Model
5.1
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