Thank you! I don't know what settings he plays at, currently he plays Fortnite on a PS4. I wish he wanted a PS5, life would then be a lot simpler and cheaper!! But he really wants a gaming PC.
The settings matter, in gaming generally, and specifically in competitive games like Fortnite. The higher the settings, the beefier the graphics card you need to drive them.
In competitive games, players who are playing to really try to win and eke out every competitive edge they can will usually play on mostly low settings. This is to keep framerate as high as possible - and in some cases because the extra visual effects are distracting. You can often get away with a less outrageously beefy GPU as a result.
You said your son is targeting 240fps. What monitor are they gaming on?
If it's only a 60hz monitor, there's no real point to 240fps. Because the monitor only refreshes 60 times per second (60hz). So he'll want/need a 240hz monitor.
If he's playing at very high settings rather than on 'competitive settings' though, it's kind of debatable whether it makes sense to target 240fps. Because if you turn up the eye candy, you're clearly not trying to maximise your framerate, in which case does it really make sense to spend huge premiums on top level hardware for relatively small performance gains.
i.e. you can probably get a less expensive computer. Or, aim for a higher resolution monitor for better visual fidelity.
I'm sure there are people who play at 240+ fps on a 240hz monitor at 1080p at the Epic preset but that's not how you usually play competitively.
How to get the highest framerates and clearest visibility possible.
Do you think it would be better to build a PC, would that be cheaper?
We live in Japan, so it is very easy for us to go to Akihabara and have a PC built.
It could well be cheaper. It would usually be cheaper in the UK and afaik the US, but I've no idea about what the market in Japan is like for these things, in terms of price or availability. Apparently hardware is quite expensive(?)
(even allowing for tax). Also if you pay someone to build it for you, there's that cost to factor in too.
If you were going for a build for fortnite competitive settings, something like:
PCPartPicker Part List
CPU: Intel Core i5-10600K 4.1 GHz 6-Core Processor
CPU Cooler: Corsair H100x 57.2 CFM Liquid CPU Cooler
Motherboard: Gigabyte Z490 VISION G ATX LGA1200 Motherboard
Memory: Corsair Vengeance LPX 16 GB (2 x 8 GB) DDR4-3600 CL18 Memory
(¥10393.24 @ Newegg Japan)
Storage: Crucial P1 1 TB M.2-2280 NVME Solid State Drive
(¥15427.88 @ Newegg Japan)
Video Card: EVGA GeForce RTX 2060 SUPER 8 GB SC BLACK GAMING Video Card
Case: Fractal Design Meshify C ATX Mid Tower Case
Power Supply: SeaSonic FOCUS SGX 650 W 80+ Gold Certified Fully Modular SFX Power Supply
(¥21663.50 @ Newegg Japan)
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2020-08-02 22:41 JST+0900
I did a partpicker list because it was easiest but partpicker for Japan only seems to list imports from Newegg, and if going to Akihabara I imagine you'd buy off the shelves anyway at whatever prices are there.
i.e. an i5 10600k - no real advantage for the i7 10700k for gaming, though the i7 10700k could make sense for streaming.
A Z490 motherboard that isn't trash
16gb fast RAM
RTX 2060 Super should be more than fine
SSD doesn't really matter - ideally a mid-range M.2 NVMe SSD, the most expensive aren't worth it, while the more mid-range ones are barely more expensive than Sata SSDs.
Decent CPU cooler - e.g. 240mm AIO cooler suitable for overclocking
550W+ gold-rated PSU - decent model from a decent brand.
Case with mesh at the front - not solid plastic or glass.
If looking to spend less, an AMD Ryzen 5 3600 CPU + B450 motherboard (if buying in person make sure it has the sticker to say it supports 3rd gen Ryzen). And even the stock cooler with the R5 3600 is fine, though you could get any old tower cooler with a 120mm fan if you wanted.