I think you have seen this effect before. By using this effect you can do pixelization. Very short tutorial and it will not be boring I guess.
1. Start with a new document and apply the gradient as shown below:
2. Here is Gradient style which i used:
3. Type your desire text in the middle of it, I’ve typed STUNNING MESH with IMPACT font using black color:
4. Run the command, Layer >> Layer Style >> Drop Shadow and give the following setting:
this result will come:
5. Now press Ctrl+E to merge it with Background layer. Now run the command Filter >> Texture >> Patchwork and give these settings:
This kind of result should come:
6. Now create a new layer and fill with the black color and go to Filter >> Noise >> Add Noise:
7. Select Elliptical tool and gives the feather 70% and draw an ellipse like shown below. Now press Delete button thrice.
8. Here is the final look: