First of all, thank you Ari for such a wonderful resource you are providing here. It really has saved me hours of research!
I'm just about to hit the big order button, but wanted some opinions on my hardware beforehand. My build is very very similar to the newly updated one (parts list below), with a couple of exceptions.
I have decided on the Cooler Master V550 psu, as I can get it for a good price but I note you recommend a 650w psu. Pcpartpicker suggests maximum draw is 340w, so should the v550 be ample?
Also, I was thinking of swapping the MB from the guide to the gigabyte z170m-d3h. Where I am based (China), the z170mx gaming 5 runs at about a 75% cost premium to the d3h and at the moment I'm not sure it's worth it (I won't be going SLI in the future). The only problem is that I can find very few reviews etc for this board.
Here is the permalink to the parts list: http://uk.pcpartpicker.com/list/XW2ZJV
I'd love to hear everyone's opinions or suggestions (if you have any of course!).
Welcome to The TBG Forum, mattym!
Glad to hear you're interested in this build. It's definitely quite impressive when put together!
At to your two component questions, here are the answers:
(1) The Cooler Master V550 (US Link
| UK Link
) is an older Seasonic-based fully-modular PSU, which is to say it's actually a great pick. It's no longer cost-competitive in the US, but if you're finding it at a good price in China, then definitely go for it.
(2) Gigabyte's D3H line has a history of delivering great value, and the GA-Z170M-D3H (US Link
| UK Link
) is no different. One of the ways Gigabyte cuts costs on this board is to equip it with two PCIe slots and two PCI slots, the latter which are essentially useless. So you have to view this board as having two slots, which does reduce versatility a bit. The lack of SLI isn't a problem for you, clearly, but for example you might want a sound card and a wireless card - you'd have to choose one or the other.
Now, a word on power requirements. You are correct that a 650W unit is not required for this build, but in fact PC Part Picker is also wrong regarding its estimate. It uses algorithms based on listed thermal design envelope specifications, and it's typically about 30% off the mark. Because I've tested all of Intel's recent-gen quad-cores on a power meter, along with nearly every Nvidia video card released over the past 5 years, I know that the combination of a 6600K and a GTX 1070 in fact uses 240W at load.
Why do I spec the system with a 650W unit then? Two reasons: (1) the ability to go SLI (which by the way only draws about 350W, but requires a lot of cabling that 550W units may not have), and (2) economies of scale. You simply will not find high-quality PSUs rated under 550W, and 650W units typically cost just 5-10% more. Therefore, it makes sense in most cases to buy a 550W or even 650W unit even if all you need is 250-300W, as these are the best values. They also allow you to use the PSU in another more powerful system later on. Given that most quality
power supplies have at least a 5-year warranty (and will likely outlast that), it's a good investment to make.
Hope that helps!