Home GPU Comparison AMD Radeon R9 285X vs NVIDIA GeForce GT 640

AMD Radeon R9 285X vs NVIDIA GeForce GT 640

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 285X and 2GB VRAM GeForce GT 640 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 285X 's Advantages
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (264.0GB/s vs 28.51GB/s)
1664 additional rendering cores
NVIDIA GeForce GT 640 's Advantages
Lower TDP (65W vs 200W)

Score

Benchmark

FP32 (float)
Radeon R9 285X +492%
4.104 TFLOPS
GeForce GT 640
0.693 TFLOPS
VS

Graphics Card

Unknown
Release Date
Jun 2012
Volcanic Islands
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
-
-
-
-
-
1375 MHz
Memory Clock
891 MHz

Memory

3GB
Memory Size
2GB
GDDR5
Memory Type
DDR3
384bit
Memory Bus
128bit
264.0GB/s
Bandwidth
28.51GB/s

Render Config

32
Compute Units
-
-
-
-
2048
Shading Units
384
128
TMUs
32
32
ROPs
16
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per SMX)
768 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

32.06 GPixel/s
Pixel Rate
7.216 GPixel/s
128.3 GTexel/s
Texture Rate
28.86 GTexel/s
-
-
-
4.104 TFLOPS
FP32 (float)
692.7 GFLOPS
-
FP64 (double)
28.86 GFLOPS

Board Design

200W
TDP
65W
550 W
Suggested PSU
250 W
2x DVI 1x 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

Tonga
GPU Name
GK107
Tonga XT (215-0851313)
GPU Variant
GK107-300-A2
GCN 3.0
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
5 billion
Transistors
1.27 billion
366 mm²
Die Size
118 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
3.0
6.3
Shader Model
5.1

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