Hi i am a newbie on here so go easy on me
I am looking to upgrade my graphics card on my HP Pavillion H8 1250 desktop running win 10 with a Intel I7 2600 @3.4 ghz with 14 gb ddr3 ram and a Nvidea Geforce GT 530 graphics card ,my display is a LG FLATRON E2351 23" screen with 5ms responce time so i have a budget 0f £350 and a case that does not have a great deal of space so may have to rig up a harness for the graphics card fo money saving or push to a new larger case worse case scenario so advice most welcome thanks in advance .

I am looking to upgrade my graphics card on my HP Pavillion H8 1250 desktop running win 10 with a Intel I7 2600 @3.4 ghz with 14 gb ddr3 ram and a Nvidea Geforce GT 530 graphics card ,my display is a LG FLATRON E2351 23" screen with 5ms responce time so i have a budget 0f £350 and a case that does not have a great deal of space so may have to rig up a harness for the graphics card fo money saving or push to a new larger case worse case scenario so advice most welcome thanks in advance .