Memory loss in Quadro P1000 graphic card

Hi

My HP Z440 system has a Quadro P1000 graphic card. Recently it slowed down and is hanging too often. the errors it is showing are:

“Your Quadro P1000/PCIe/SSe2 graphics card has 1MB of graphics card memory. SketchUp requires a graphics card that has 256 MB or more of memory. Note: if you think this error is incorrect, see Help> Documentation”.

where as my system information says:

Quadro P1000 : Driver version : 431.94
Driver type : Standard
Direct3D API version : 12
Direct3D feature level : 12_1
CUDA Cores : 640
Graphics clock : 1265 MHz
Memory data rate : 5.01 Gbps
Memory interface : 128-bit
Memory bandwidth : 80.16 GB/s
Total available graphics memory : 12246 MB
Dedicated video memory : 4096 MB GDDR5
System video memory : 0 MB
Shared system memory : 8150 MB
Video BIOS version : 86.07.3B.00.46
IRQ : Not used
Bus : PCI Express x16 Gen3
Device Id : 10DE 1CB1 11BC103C
Part Number : G2120502

I use Sketchup and AutoCAD for design purpose. mostly walkthroughs and animations. Can anyone find a solution for this. I seriously need it very fast as i have project deadlines and cannot afford to lose time.

thanks in advance.