geofelt :
HD630 might be around GT1030 performance.
It's not even close, actually. A GT 1030 might be low-end, but even it should be several times as fast as Intel's HD630 integrated graphics. And a GTX 1050 will be around twice as fast as a GT 1030. Intel's integrated graphics are not a good option for anyone who wants to play most recent games, as in many newer titles they'll struggle to 30fps even at 720p at the lowest settings. Only AMD's recently launched Ryzen 2200G and 2400G offer integrated graphics performance around the same level as a GT 1030. And even a GT 1030 level card is a bit too weak to handle 1080p in many newer games, though it should handle 720p rather well.
Plus, even the CPU portion of the G4600 isn't particularly great by today's standards, now that you can get relatively decent quad-core processors for around $100 or so. It's a dual-core processor, and while its hyperthreading will definitely help, having at least four true cores will help performance a lot more in many newer games, which are increasingly making heavy use of four or more threads.
Some cheap quad-core processors for around $100 include the i3-8100 for around $115, the Ryzen 1200 for around $95, and the Ryzen 2200G for around $100. The i3-8100 might offer slightly faster gaming performance than the others, but again, you would likely want a dedicated GPU with it, since Intel's integrated graphics are simply not up to the task of running the latest games in any reasonable capacity. Also, currently there are still only higher-end motherboards available for Intel's "Coffee Lake" 8000-series processors, but lower-end motherboards should be launching within the next couple weeks or so.
The Ryzen 1200 is another option with compatible lower-end, overclocking-capable motherboard's readily available, though it lacks integrated graphics entirely, so you would certainly need a dedicated card for that. The Ryzen 2200G is pretty much the 1200's successor, and as previously mentioned, it does include some relatively decent integrated graphics, just a little behind a GT 1030 in terms of performance in most games, provided you have it paired with a dual-channel kit of relatively fast system memory (preferably around DDR4 2933 or higher). The only notable issue with the 2200G is that it just came out some weeks back, and most of the motherboards for sale out there haven't had their BIOS updated to work with it yet, which can cause trouble getting the system up and running, since you may need to borrow a loaner CPU from AMD to update the motherboard to work with the processor. AMD has more processors coming out in a few weeks though, and we may see more motherboards certified to work with them out of the box by then.
Of course, as I said before, a GTX 1050 will be around twice as fast as a GT 1030, and even that will be a bit faster than the Ryzen 2200G's integrated graphics. And it is possible to find some GTX 1050's that aren't too excessively overpriced. It's possible to find some for around $150 right now, which is definitely more than the card's launch price, but not as much of a markup as there is on higher end cards. Of course, you didn't really specify whether he even needs a new system, or just a graphics card for his existing one, which would be useful to know.
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