You should use an all-in-one liquid CPU cooler like the Corsair H100i or a comparative cooler with a 240mm (2 x 120mm fans) or a 280mm (2 x 140mm fans) radiator.
I didn't realize that the 2TB WD Blue was 5400 RPM. My bad.
I thought that the 2TB WD Blue has the same spindle speed as the 1TB WD Blue, which I've now discovered has two model numbers. (The 7200RPM version of the 1TB WD Blue is WD10EZEX.)
Disregard my earlier recommendation.
Let me...
Overclocking is not difficult these days. There plenty of good overclocking guides on YouTube, not to mention the good folks here at the [H].
You can stick with the i7-8700K and the Asus Strix Z370-H. I still recommend the Corsair Vengeance LPX RAM (DDR4-3200) to prevent any clearance issues...
I believe that your spending is a bit out of whack.
If you're spending all of that money for case fans, I recommend that you instead spend some of that extra money on a better CPU cooler (like the Corsair H100i or the Noctua NH-D15). Additionally, the NZXT S340 comes with two 120mm case fans...
Here's the direct link:
https://www.newegg.com/Product/ProductCombos.aspx?Item=19-117-827&SubCategory=343&fromcs=0&bcmTag=0&SortField=0&PageSize=25&Page=1
Do you want to overclock? If yes, how far do you want to overclock your processor? I ask because you can save some money by choosing different parts that aren't "optimized" for overclocking. For example, you can buy some DDR4 2666 RAM for considerably less than DDR4 3200 RAM.
While an SSD will...
NewEgg has a GTX 1080 on sale this weekend for $580:
$579.99 - MSI DUKE 8G OC GTX 1080 (sales price, expires 5/20)
If you buy it this weekend, you'd save $100 from what you could buy from SuperBiiz.
As for the hard drive, since it's not your primary drive, you can save some money with a...
How badly does your friend want to game? The prices on mid-range cards have ballooned to the point that they can easily cost upwards of half of your budget. Add in the inflated cost of DDR4 RAM and you may need to increase your budget.
For example, the following build is what I would consider...
I haven't heard of any confirmed dates for either platform. Then again, the skeptic in me believes that Intel won't release its new platform before mid-2019 at the earliest.
I believe that AMD will never reach the level of Intel's single-threaded performance, but historically, AMD's claim to...
Do you have an external hard drive enclosure or a USB-based drive dock? If so, disconnect and remove your drives from the computer and use the enclosure or the dock to test them individually.
If not, maybe you should consider buying one. I recommend a USB 3.0 dock as USB 2.x would take too long...