My automatically configured HorizSync - is it correct?

When using Slackware, I used the xorgsetup program to configure my xorg.conf. I use an HP vs17c monitor. When I downloaded the manual for my monitor and looked at the specifications for it, it said Horizontal Sync is 83 and Vertical Refresh is 50-76. The xorgsetup program came up with HorizSync 30-83 and VertRefresh 50-76. I'm wondering about the HorizSync and if there is any kind of problem with it. It appers to work perfectly, but should I use the 30-83? The manual for my monitor only says 83.
 
If it works perfectly--how can you improve it?

The range of horizontal sync frequencies corresponds with different resolutions. The manual apparently only lists the maximum.
 
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