I recently replaced the GT 730 in my ITX media PC with a Gigabyte GT 1030:
https://www.newegg.com/Product/Product.aspx?Item=N82E16814125972
I've been running the GPU at 1412MHz (+185) and the VRAM at 3404MHz (+400) for almost a week now with zero issues.
The VRAM overclock boosts its bus speed from 48.1GB/s to 54.5GB/s. The GPU overclock also knocks the Boost Clock up to 1653MHz, but it typically sits at 1912MHz(!) when running intensive things like Doom 4.
Temperatures haven't exceeded 63C so far, but despite the small case of my machine it's very well ventilated: Boost clocks will drop as temperature rises but you can adjust the Temperature Target with something like nVidia Inspector or MSI Afterburner to something higher which seems to mitigate that to some degree.
Overall it's translated into single digit to low-teens gains in FPS for more demanding games at 1080p. For Doom 4 and Wolfenstein - The New Order/Old Blood it allows them to run at 720p with virtually everything maxed out for a fairly consistent 60FPs at all times.
I have it paired to an old Core i3 2120 @ 3.3GHz with 8GB of DDR3-1333: The OS is an extensively stripped down and modified install of Windows 7 x64 I did with NTLite and tons of manual tweaks. Your mileage may vary based on how much faster/slower the CPU and such you put in the build is along with its OS?