Those two "screws"
1 - On-Board Motherboard VGA (has "two screws")
2 - "connected the monitor via 210 gxc graphis card"
In both cases those "screws" are the Offset Studs that should REMAIN ON THE ON-BOARD AND THE CARD! The monitor should have NO SCREWS. I'm betting that when you disconnect the Monitor from the Card that you're unscrewing the STUDS along with the Monitor Connector. Take them OFF the Monitor Connector and put them BACK INTO the Card and snug/tightne them.
This sometimes happens when the Monitor Connector is attached too tightly (more than the studs screwed into the device). SNUG MONITOR ON, NOT TIGHTEN!
Now, I've encountered a Motherboard (inside a tower) having the On-Board VGA Connector "covered" on the back side of the Tower and an Add-In Video Card used instead. AFAICR, this "disabled" the On-Board -but- there COULD be a setting in the BIOS to disable On-Board -or- a Jumper on the Motherboard. After setting the Jumper/BIOS to Enable On-Board, removing the Cover (back of tower) -and- the Add-In, then the On-Board was functional. HOWEVER, this was -specifically- done because the On-Board uses ("steals") Computer RAM to be used by Video and -usually- is much less (usually about 4MB->32MB, maybe more) than the REAL RAM installed onto a REAL Add-In Card. BE FORWARNED!
Note: I haven't looked at your MoBo BIOS/Specs to determine if this is, indeed, your case.
(Checking now... GA-H81M-H - be right back...)
Integrated Graphics Processor - Intel® HD Graphics support:
- 1 x D-Sub port, supporting a maximum resolution of 1920x1200 <<<===YOUR VGA CONNECTOR
- 1 x HDMI port, supporting a maximum resolution of 4096 x 2160 @ 24 Hz / 2560 x 1600 @ 60 Hz
* Support for HDMI 1.4a version.
- Maximum shared memory of 1 GB
So... why the Monitor is on an Add-In Graphics Card? That's a LOT of "stolen RAM" you could use, depending on what you already have in the two RAM slots.
This is what you said:
...ordered a 2500k and MSI H61M-P31 motherboard tower from Amazon...
...upgraded it to core i5-4590 cpu and GA-H81M-H Mobo socket 1150...
So, is it already in a Tower? (looking now...)
EDIT2 - found this only (what you originally ordered?):
(what you got?):
Edited by submix8c, Today, 02:14 PM.