Overclock Asus VG248QE? 720p@200hz??

[HDxDaniel]

[I'M USING THE CRU TOOL]

My Asus VG248QE runs up to 144hz (1080p,720p...), when it's at 1080p@144hz the frecuency (or whatever the name is...) is 166.610 khz (~167khz) and the pixel clock is 346.55 Mhz.

SO, If I create a new custom resolucion in which:
1. The resolution is 1280x720
2. As the resolution is lower I am going to increase refresh rate from 144hz to more than 175hz maybe, because the pixel clock when is 720p@200hz (228.39 Mhz) is even lower than 1080p@144hz (346.55 Mhz), and the frecuency is also lower (158.604 khz).

3. So going from 1080p@144hz to 720p@200hz or 720p@175hz would be safe?
_____
720p@200hz: http://gyazo.com/6108a3000c34a66edb07401b305d80c6.png

1080p@144hz:
http://gyazo.com/2769c8ad94dab74cb8d98ad5c6afead3.png
____
sorry for my english