Drivers not installing for GT 730  

Have you now actually bought that card.
Your GT730 has
Outputs
1x DVI
1x HDMI
1x VGA
which connection do you use for your monitor AND what connections does the monitor have available

The card you plan to buy has
DisplayPort, HDMI

SO if you presently use the VGA and your monitor ONLY has VGA - you need to consider that.

More to the point, perhaps is that the card you plan to buy has passive cooling - no fan
In some systems using your motherboard which is Micro ATX form factor, the case is also small and if the cooling of the case is not really efficient then you MAY experience temp problems with the card, as without its own fan, it relies on he case cooling to take the heat way.

Additionally although it is a low profile like the GT730. That card the 730 measures
Height: 2.71 in - 68.8 mm
Length: 5.7 in - 144.8 mm
Width: Single Slot - average width would be approx 20mm

and the proposed card measures
Length 153mm
Height 69mm
Width 38 mm

so height is not a problem and there is only an extra 8mm on length.
HOWEVER if you have NOT bought the card I would urge you to check the situation on your board
There is no image on the ECS site for the board
H55H-M | ECS Global

However it does show that it is micro ATX
Micro-ATX Size, 244mm*200mm

and the images I found here
ECS H55H-M microATX Intel LGA1156 Motherboard Review - Page 2 of 7 - Legit Reviews Board Layout

raises doubt in my mind that the card will fit on that board - have a look how close the slot appears to be to the cooling fins of a chip and indeed to the I/O plate audio ports
See Test Setup image on the review.

The card shown in the slot is the Albatron GeForce 9600GT which is single slot width and your proposed card is 38mm width.

YOU need to check carefully - IF YOU have not bought it, that the card will fit
I have mentioned this in my posts

The board is microATX if it is in a micro case you need to ensure the card will fit, I have little doubt that a full size one will NOT and that is why your present one is low profile,
ECS H55H-M microATX Intel LGA1156 Motherboard Review - Page 2 of 7 - Legit Reviews Board Layout

You need to check as I said the space available

Hope all works out for you.
It is not the one I would have gone for, but it is certainly better than what you have.,