Radeon R9 295X2 vs GeForce GT 640 Rev. 2
We compared two Desktop platform GPUs: 4GB VRAM Radeon R9 295X2 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
Radeon R9 295X2 's Advantages
Released 11 months late
More VRAM (4GB vs 1024GB)
Larger VRAM bandwidth (320.0GB/s vs 40.06GB/s)
2432 additional rendering cores
GeForce GT 640 Rev. 2 's Advantages
Lower TDP (49W vs 500W)
Score
Benchmark
FP32 (float)
Radeon R9 295X2
+613%
5733
GeForce GT 640 Rev. 2
803
Graphics Card
Apr 2014
Release Date
May 2013
Volcanic Islands
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x8
Clock Speeds
1250 MHz
Memory Clock
1252 MHz
Memory
4GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
512bit
Memory Bus
64bit
320.0GB/s
Bandwidth
40.06GB/s
Render Config
44
Compute Units
-
2816
Shading Units
384
176
TMUs
32
64
ROPs
8
16 KB (per CU)
L1 Cache
16 KB (per SMX)
1024 KB
L2 Cache
512 KB
Theoretical Performance
65.15 GPixel/s
Pixel Rate
8.368 GPixel/s
179.2 GTexel/s
Texture Rate
33.47 GTexel/s
5.733 TFLOPS
FP32 (float)
803.3 GFLOPS
716.7 GFLOPS
FP64 (double)
33.47 GFLOPS
Board Design
500W
TDP
49W
900 W
Suggested PSU
200 W
1x DVI
4x mini-DisplayPort 1.2
Outputs
1x DVI
1x HDMI 1.4a
1x VGA
2x 8-pin
Power Connectors
None
Graphics Processor
Vesuvius
GPU Name
GK208
Vesuvius XT
(215-0852022)
GPU Variant
GK208-400-A1
GCN 2.0
Architecture
Kepler 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
6.2 billion
Transistors
1.02 billion
438 mm²
Die Size
87 mm²
Graphics Features
12 (12_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
2.0
OpenCL
3.0
1.2
Vulkan
1.1
-
CUDA
3.5
6.3
Shader Model
5.1