Home GPU Comparison NVIDIA GeForce GTX 780 Ti vs NVIDIA GeForce GTX 645 OEM

NVIDIA GeForce GTX 780 Ti vs NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 3GB VRAM GeForce GTX 780 Ti 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 780 Ti 's Advantages
Released 7 months late
Boost Clock928MHz
More VRAM (3GB vs 1024GB)
Larger VRAM bandwidth (336.6GB/s vs 64.00GB/s)
2304 additional rendering cores
NVIDIA GeForce GTX 645 OEM 's Advantages
Lower TDP (65W vs 250W)

Score

Benchmark

FP32 (float)
GeForce GTX 780 Ti +463%
5.345 TFLOPS
GeForce GTX 645 OEM
0.949 TFLOPS
VS

Graphics Card

Nov 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

875 MHz
Base Clock
-
928 MHz
Boost Clock
-
1753 MHz
Memory Clock
1000 MHz

Memory

3GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
128bit
336.6GB/s
Bandwidth
64.00GB/s

Render Config

-
-
-
-
-
-
2880
Shading Units
576
240
TMUs
48
48
ROPs
16
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
1536 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

55.68 GPixel/s
Pixel Rate
9.888 GPixel/s
222.7 GTexel/s
Texture Rate
39.55 GTexel/s
-
-
-
5.345 TFLOPS
FP32 (float)
949.2 GFLOPS
222.7 GFLOPS
FP64 (double)
39.55 GFLOPS

Board Design

250W
TDP
65W
600 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

GK110B
GPU Name
GK106
GK110-425-B1
GPU Variant
GK106-200-A1
Kepler
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
7.08 billion
Transistors
2.54 billion
561 mm²
Die Size
221 mm²

Graphics Features

12 (11_1)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.1
3.5
CUDA
3.0
5.1
Shader Model
5.1

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