Radeon R9 280 vs GeForce GT 640
We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280 and 2GB VRAM GeForce GT 640 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon R9 280 's Advantages
Released 1 years and 9 months late
Boost Clock933MHz
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (240.0GB/s vs 28.51GB/s)
1408 additional rendering cores
GeForce GT 640 's Advantages
Lower TDP (65W vs 200W)
Score
Benchmark
FP32 (float)
Radeon R9 280
+382%
3344
GeForce GT 640
693
3DMark Time Spy
Radeon R9 280
+391%
2009
GeForce GT 640
409
Graphics Card
Mar 2014
Release Date
Jun 2012
Volcanic Islands
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
827 MHz
Base Clock
-
933 MHz
Boost Clock
-
1250 MHz
Memory Clock
891 MHz
Memory
3GB
Memory Size
2GB
GDDR5
Memory Type
DDR3
384bit
Memory Bus
128bit
240.0GB/s
Bandwidth
28.51GB/s
Render Config
28
Compute Units
-
1792
Shading Units
384
112
TMUs
32
32
ROPs
16
16 KB (per CU)
L1 Cache
16 KB (per SMX)
768 KB
L2 Cache
256 KB
Theoretical Performance
29.86 GPixel/s
Pixel Rate
7.216 GPixel/s
104.5 GTexel/s
Texture Rate
28.86 GTexel/s
3.344 TFLOPS
FP32 (float)
692.7 GFLOPS
836.0 GFLOPS
FP64 (double)
28.86 GFLOPS
Board Design
200W
TDP
65W
550 W
Suggested PSU
250 W
1x DVI
2x HDMI 1.4a
1x DisplayPort 1.2
Outputs
1x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
1x 6-pin + 1x 8-pin
Power Connectors
None
Graphics Processor
Tahiti
GPU Name
GK107
Tahiti PRO3
(215-0821330)
GPU Variant
GK107-300-A2
GCN 1.0
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
4.313 billion
Transistors
1.27 billion
352 mm²
Die Size
118 mm²
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