GeForce GTX 970 vs GeForce GT 640 OEM Rebrand
We compared two Desktop platform GPUs: 4GB VRAM GeForce GTX 970 and 1536MB VRAM GeForce GT 640 OEM Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce GTX 970 's Advantages
Released 2 years and 5 months late
Boost Clock1178MHz
More VRAM (4GB vs 1536GB)
Larger VRAM bandwidth (224.4GB/s vs 38.40GB/s)
1520 additional rendering cores
GeForce GT 640 OEM Rebrand 's Advantages
Lower TDP (75W vs 148W)
Score
Benchmark
FP32 (float)
GeForce GTX 970
+844%
3920
GeForce GT 640 OEM Rebrand
415
Graphics Card
Sep 2014
Release Date
Apr 2012
GeForce 900
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
1050 MHz
Base Clock
-
1178 MHz
Boost Clock
-
1753 MHz
Memory Clock
800 MHz
Memory
4GB
Memory Size
1536MB
GDDR5
Memory Type
DDR3
256bit
Memory Bus
192bit
224.4GB/s
Bandwidth
38.40GB/s
Render Config
-
SM Count
3
1664
Shading Units
144
104
TMUs
24
56
ROPs
24
48 KB (per SMM)
L1 Cache
64 KB (per SM)
2 MB
L2 Cache
384 KB
Theoretical Performance
65.97 GPixel/s
Pixel Rate
4.320 GPixel/s
122.5 GTexel/s
Texture Rate
17.28 GTexel/s
3.920 TFLOPS
FP32 (float)
414.7 GFLOPS
122.5 GFLOPS
FP64 (double)
34.56 GFLOPS
Board Design
148W
TDP
75W
300 W
Suggested PSU
250 W
1x DVI
1x HDMI 2.0
3x DisplayPort 1.4a
Outputs
2x DVI
1x mini-HDMI 1.3a
2x 6-pin
Power Connectors
None
Graphics Processor
GM204
GPU Name
GF116
GM204-200-A1
GPU Variant
GF116-150-A1
Maxwell 2.0
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
5.2 billion
Transistors
1.17 billion
398 mm²
Die Size
238 mm²
Graphics Features
12 (12_1)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
1.1
1.3
Vulkan
N/A
5.2
CUDA
2.1
6.4
Shader Model
5.1
