NVIDIA GeForce GTX 970 vs NVIDIA GeForce GTX 645 OEM
We compared two Desktop platform GPUs: 4GB VRAM GeForce GTX 970 and 1024MB VRAM GeForce GTX 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GTX 970 's Advantages
Released 1 years and 5 months late
Boost Clock1178MHz
More VRAM (4GB vs 1024GB)
Larger VRAM bandwidth (224.4GB/s vs 64.00GB/s)
1088 additional rendering cores
NVIDIA GeForce GTX 645 OEM 's Advantages
Lower TDP (65W vs 148W)
Score
Benchmark
FP32 (float)
GeForce GTX 970
+313%
3.92 TFLOPS
GeForce GTX 645 OEM
0.949 TFLOPS
Graphics Card
Sep 2014
Release Date
Apr 2013
GeForce 900
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
1050 MHz
Base Clock
-
1178 MHz
Boost Clock
-
1753 MHz
Memory Clock
1000 MHz
Memory
4GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
224.4GB/s
Bandwidth
64.00GB/s
Render Config
-
-
-
-
-
-
1664
Shading Units
576
104
TMUs
48
56
ROPs
16
-
-
-
-
-
-
48 KB (per SMM)
L1 Cache
16 KB (per SMX)
2 MB
L2 Cache
256 KB
-
-
-
Theoretical Performance
65.97 GPixel/s
Pixel Rate
9.888 GPixel/s
122.5 GTexel/s
Texture Rate
39.55 GTexel/s
-
-
-
3.920 TFLOPS
FP32 (float)
949.2 GFLOPS
122.5 GFLOPS
FP64 (double)
39.55 GFLOPS
Board Design
148W
TDP
65W
300 W
Suggested PSU
250 W
1x DVI
1x HDMI 2.0
3x DisplayPort 1.4a
Outputs
1x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
2x 6-pin
Power Connectors
None
Graphics Processor
GM204
GPU Name
GK106
GM204-200-A1
GPU Variant
GK106-200-A1
Maxwell 2.0
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
5.2 billion
Transistors
2.54 billion
398 mm²
Die Size
221 mm²
Graphics Features
12 (12_1)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.3
Vulkan
1.1
5.2
CUDA
3.0
6.4
Shader Model
5.1
