Home GPU Comparison NVIDIA GeForce GTX 770 vs NVIDIA GeForce GTX 645 OEM

NVIDIA GeForce GTX 770 vs NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 770 and 1024MB VRAM GeForce GTX 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 770 's Advantages
Boost Clock1085MHz
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (224.4GB/s vs 64.00GB/s)
960 additional rendering cores
NVIDIA GeForce GTX 645 OEM 's Advantages
Lower TDP (65W vs 230W)

Score

Benchmark

FP32 (float)
GeForce GTX 770 +251%
3.333 TFLOPS
GeForce GTX 645 OEM
0.949 TFLOPS
VS

Graphics Card

May 2013
Release Date
Apr 2013
GeForce 700
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

1046 MHz
Base Clock
-
1085 MHz
Boost Clock
-
1753 MHz
Memory Clock
1000 MHz

Memory

2GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
224.4GB/s
Bandwidth
64.00GB/s

Render Config

-
-
-
-
-
-
1536
Shading Units
576
128
TMUs
48
32
ROPs
16
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
512 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

34.72 GPixel/s
Pixel Rate
9.888 GPixel/s
138.9 GTexel/s
Texture Rate
39.55 GTexel/s
-
-
-
3.333 TFLOPS
FP32 (float)
949.2 GFLOPS
138.9 GFLOPS
FP64 (double)
39.55 GFLOPS

Board Design

230W
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

GK104
GPU Name
GK106
GK104-425-A2
GPU Variant
GK106-200-A1
Kepler
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
3.54 billion
Transistors
2.54 billion
294 mm²
Die Size
221 mm²

Graphics Features

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

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