Home GPU Comparison NVIDIA GeForce GT 640 vs NVIDIA GeForce GT 640 OEM Rebrand

NVIDIA GeForce GT 640 vs NVIDIA GeForce GT 640 OEM Rebrand

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 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

NVIDIA GeForce GT 640 's Advantages
More VRAM (2GB vs 1536GB)
240 additional rendering cores
Lower TDP (65W vs 75W)
NVIDIA GeForce GT 640 OEM Rebrand 's Advantages
Larger VRAM bandwidth (38.40GB/s vs 28.51GB/s)

Score

Benchmark

FP32 (float)
GeForce GT 640 +66%
0.693 TFLOPS
GeForce GT 640 OEM Rebrand
0.415 TFLOPS
VS

Graphics Card

Jun 2012
Release Date
Apr 2012
GeForce 600
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

-
-
-
-
-
-
891 MHz
Memory Clock
800 MHz

Memory

2GB
Memory Size
1536MB
DDR3
Memory Type
DDR3
128bit
Memory Bus
192bit
28.51GB/s
Bandwidth
38.40GB/s

Render Config

-
-
-
-
SM Count
3
384
Shading Units
144
32
TMUs
24
16
ROPs
24
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
64 KB (per SM)
256 KB
L2 Cache
384 KB
-
-
-

Theoretical Performance

7.216 GPixel/s
Pixel Rate
4.320 GPixel/s
28.86 GTexel/s
Texture Rate
17.28 GTexel/s
-
-
-
692.7 GFLOPS
FP32 (float)
414.7 GFLOPS
28.86 GFLOPS
FP64 (double)
34.56 GFLOPS

Board Design

65W
TDP
75W
250 W
Suggested PSU
250 W
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x mini-HDMI 1.3a
None
Power Connectors
None

Graphics Processor

GK107
GPU Name
GF116
GK107-300-A2
GPU Variant
GF116-150-A1
Kepler
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
1.27 billion
Transistors
1.17 billion
118 mm²
Die Size
238 mm²

Graphics Features

12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
1.1
1.1
Vulkan
N/A
3.0
CUDA
2.1
5.1
Shader Model
5.1

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