Home GPU Comparison NVIDIA GeForce GTX 645 OEM vs NVIDIA GeForce GTX 275

NVIDIA GeForce GTX 645 OEM vs NVIDIA GeForce GTX 275

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GTX 645 OEM and 896MB VRAM GeForce GTX 275 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 645 OEM 's Advantages
Released 4 years and 3 months late
More VRAM (1024GB vs 896GB)
336 additional rendering cores
Lower TDP (65W vs 219W)
NVIDIA GeForce GTX 275 's Advantages
Larger VRAM bandwidth (127.0GB/s vs 64.00GB/s)

Score

Benchmark

FP32 (float)
GeForce GTX 645 OEM +40%
0.949 TFLOPS
GeForce GTX 275
0.674 TFLOPS
VS

Graphics Card

Apr 2013
Release Date
Jan 2009
GeForce 600
Generation
GeForce 200
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

-
-
-
-
-
-
1000 MHz
Memory Clock
1134 MHz

Memory

1024MB
Memory Size
896MB
GDDR5
Memory Type
GDDR3
128bit
Memory Bus
448bit
64.00GB/s
Bandwidth
127.0GB/s

Render Config

-
-
-
-
SM Count
30
576
Shading Units
240
48
TMUs
80
16
ROPs
28
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
-
256 KB
L2 Cache
224 KB
-
-
-

Theoretical Performance

9.888 GPixel/s
Pixel Rate
17.72 GPixel/s
39.55 GTexel/s
Texture Rate
50.64 GTexel/s
-
-
-
949.2 GFLOPS
FP32 (float)
673.9 GFLOPS
39.55 GFLOPS
FP64 (double)
84.24 GFLOPS

Board Design

65W
TDP
219W
250 W
Suggested PSU
550 W
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI
None
Power Connectors
2x 6-pin

Graphics Processor

GK106
GPU Name
GT200B
GK106-200-A1
GPU Variant
G200-105-B3
Kepler
Architecture
Tesla 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
55 nm
2.54 billion
Transistors
1.4 billion
221 mm²
Die Size
470 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
1.3
5.1
Shader Model
4.0

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