Radeon R9 280 vs GeForce GT 640 OEM Rebrand
We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280 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
Radeon R9 280 's Advantages
Released 1 years and 11 months late
Boost Clock933MHz
More VRAM (3GB vs 1536GB)
Larger VRAM bandwidth (240.0GB/s vs 38.40GB/s)
1648 additional rendering cores
GeForce GT 640 OEM Rebrand 's Advantages
Lower TDP (75W vs 200W)
Score
Benchmark
FP32 (float)
Radeon R9 280
+705%
3344
GeForce GT 640 OEM Rebrand
415
Graphics Card
Mar 2014
Release Date
Apr 2012
Volcanic Islands
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
827 MHz
Base Clock
-
933 MHz
Boost Clock
-
1250 MHz
Memory Clock
800 MHz
Memory
3GB
Memory Size
1536MB
GDDR5
Memory Type
DDR3
384bit
Memory Bus
192bit
240.0GB/s
Bandwidth
38.40GB/s
Render Config
28
Compute Units
-
-
SM Count
3
1792
Shading Units
144
112
TMUs
24
32
ROPs
24
16 KB (per CU)
L1 Cache
64 KB (per SM)
768 KB
L2 Cache
384 KB
Theoretical Performance
29.86 GPixel/s
Pixel Rate
4.320 GPixel/s
104.5 GTexel/s
Texture Rate
17.28 GTexel/s
3.344 TFLOPS
FP32 (float)
414.7 GFLOPS
836.0 GFLOPS
FP64 (double)
34.56 GFLOPS
Board Design
200W
TDP
75W
550 W
Suggested PSU
250 W
1x DVI
2x HDMI 1.4a
1x DisplayPort 1.2
Outputs
2x DVI
1x mini-HDMI 1.3a
1x 6-pin + 1x 8-pin
Power Connectors
None
Graphics Processor
Tahiti
GPU Name
GF116
Tahiti PRO3
(215-0821330)
GPU Variant
GF116-150-A1
GCN 1.0
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
4.313 billion
Transistors
1.17 billion
352 mm²
Die Size
238 mm²
Graphics Features
12 (11_1)
DirectX
12 (11_0)
4.6
OpenGL
4.6
1.2
OpenCL
1.1
1.2
Vulkan
N/A
-
CUDA
2.1
5.1
Shader Model
5.1
