Home GPU Comparison NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 980 Ti

NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 980 Ti

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 6GB VRAM GeForce GTX 980 Ti to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages
Lower TDP (65W vs 250W)
NVIDIA GeForce GTX 980 Ti 's Advantages
Released 3 years late
Boost Clock1076MHz
More VRAM (6GB vs 2GB)
Larger VRAM bandwidth (336.6GB/s vs 28.51GB/s)
2432 additional rendering cores

Score

Benchmark

FP32 (float)
GeForce GT 640
0.693 TFLOPS
GeForce GTX 980 Ti +774%
6.06 TFLOPS
Blender
GeForce GT 640
32
GeForce GTX 980 Ti +1600%
544
OctaneBench
GeForce GT 640
8
GeForce GTX 980 Ti +1562%
133
VS

Graphics Card

Jun 2012
Release Date
Jun 2015
GeForce 600
Generation
GeForce 900
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
Base Clock
1000 MHz
-
Boost Clock
1076 MHz
891 MHz
Memory Clock
1753 MHz

Memory

2GB
Memory Size
6GB
DDR3
Memory Type
GDDR5
128bit
Memory Bus
384bit
28.51GB/s
Bandwidth
336.6GB/s

Render Config

-
-
-
-
-
-
384
Shading Units
2816
32
TMUs
176
16
ROPs
96
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
48 KB (per SMM)
256 KB
L2 Cache
3 MB
-
-
-

Theoretical Performance

7.216 GPixel/s
Pixel Rate
103.3 GPixel/s
28.86 GTexel/s
Texture Rate
189.4 GTexel/s
-
-
-
692.7 GFLOPS
FP32 (float)
6.060 TFLOPS
28.86 GFLOPS
FP64 (double)
189.4 GFLOPS

Board Design

65W
TDP
250W
250 W
Suggested PSU
600 W
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
1x DVI 1x HDMI 2.0 3x DisplayPort 1.4a
None
Power Connectors
1x 6-pin + 1x 8-pin

Graphics Processor

GK107
GPU Name
GM200
GK107-300-A2
GPU Variant
GM200-310-A1
Kepler
Architecture
Maxwell 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
1.27 billion
Transistors
8 billion
118 mm²
Die Size
601 mm²

Graphics Features

12 (11_0)
DirectX
12 (12_1)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.3
3.0
CUDA
5.2
5.1
Shader Model
6.4

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