Home GPU Comparison NVIDIA GeForce GT 640 vs NVIDIA GeForce 8800 GTS 512

NVIDIA GeForce GT 640 vs NVIDIA GeForce 8800 GTS 512

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 512MB VRAM GeForce 8800 GTS 512 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages
Released 4 years and 6 months late
More VRAM (2GB vs 512GB)
256 additional rendering cores
Lower TDP (65W vs 135W)
NVIDIA GeForce 8800 GTS 512 's Advantages
Larger VRAM bandwidth (52.48GB/s vs 28.51GB/s)

Score

Benchmark

FP32 (float)
GeForce GT 640 +66%
0.693 TFLOPS
GeForce 8800 GTS 512
0.416 TFLOPS
VS

Graphics Card

Jun 2012
Release Date
Dec 2007
GeForce 600
Generation
GeForce 8
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

-
-
-
-
-
-
891 MHz
Memory Clock
820 MHz

Memory

2GB
Memory Size
512MB
DDR3
Memory Type
GDDR3
128bit
Memory Bus
256bit
28.51GB/s
Bandwidth
52.48GB/s

Render Config

-
-
-
-
SM Count
16
384
Shading Units
128
32
TMUs
64
16
ROPs
16
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
-
256 KB
L2 Cache
64 KB
-
-
-

Theoretical Performance

7.216 GPixel/s
Pixel Rate
10.40 GPixel/s
28.86 GTexel/s
Texture Rate
41.60 GTexel/s
-
-
-
692.7 GFLOPS
FP32 (float)
416.0 GFLOPS
28.86 GFLOPS
FP64 (double)
-

Board Design

65W
TDP
135W
250 W
Suggested PSU
300 W
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x S-Video
None
Power Connectors
1x 6-pin

Graphics Processor

GK107
GPU Name
G92
GK107-300-A2
GPU Variant
G92-400-A2
Kepler
Architecture
Tesla
TSMC
Foundry
TSMC
28 nm
Process Size
65 nm
1.27 billion
Transistors
0.754 billion
118 mm²
Die Size
324 mm²

Graphics Features

12 (11_0)
DirectX
11.1 (10_0)
4.6
OpenGL
3.3
3.0
OpenCL
1.1
1.1
Vulkan
N/A
3.0
CUDA
1.1
5.1
Shader Model
4.0

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