Monitor w2408h recognised as 'Generic non-PnP'

Operating System: Windows Pro 8.1
Graphics card: HIS R9 270X IceQ X²
Monitor w2408h is not recognised as PnP and will not display at 1920x1200. Is recognised as 'Generic non-PnP' with max resolution of 1600x1200.
Used monitor with no problem on ASUS notebook at 1920x1200.
Please advise
Board: Gigabyte Technology Co., Ltd. Z87-D3HP-CF, Intel i7
AMD Radeon R9 270X ICEQ
HP w2408h Monitor
32 Gb RAM
250 Gb SSD,2 X 2Tb HDD

Hi Provost,
Thanks for the swift reply.
No, The ASUS G53W notebook was running Windows 7 SP1.
Board: Gigabyte Technology Co., Ltd. Z87-D3HP-CF, Intel i7
AMD Radeon R9 270X ICEQ
HP w2408h Monitor
32 Gb RAM
250 Gb SSD,2 X 2Tb HDD

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