I've got a few video cards laying around and wanted to try to put together a mining rig for bitcoin.  This would be a first for me, I've always just bought Bitmain miners, but why not if I've got most of the equipment and can afford a few hundred to try.
I see that MSI has a Z370-A Pro is only $100 after $10 MIR that's designed for mining.
The only other thing I would need is a CPU, but have no idea which one is recommended or if a minimum is required.  I know the graphics card does the load, but if I've got 8 cards running (2 on motherboard and 6 on riser cards), do I need an adequate CPU to handle the load?  With the Z370 it needs to be a 8th gen. Intel.  Will a i5 8400 65W be OK, it's $200?
I've got the rest of the big items.  A couple 8GB sticks of DDR4 (should I use both or just one)? A CPU Cooler. A few Hard Drives lying around.
I've got a EVGA 1600w Platinum power supply that i'm not using. (will this handle 8 GPU cards?)
I see a case is $60 on eBay https://www.ebay.com/i/322581889838?chn=ps&dispctrl=1 if I need to go with one.
And the riser card set for 6 is like around $45 and the USB 3.0 card is $30 on amazon.com are the accessories I'd need.

New Thermaltake Titanium power supplies that include app to remote shut down and restart (1500w version will be for sale soon).  Price will probably turn many away, but...
http://www.tweaktown.com/news/53253/thermaltakes-new-toughpower-psus-turned-remotely/index.html

http://www.thermaltake.com/products-model.aspx?id=C_00002920

Just wondering if anyone else is keeping an eye out on the pool hashing rate dropping in 30 minutes?  I'll be shutting down a couple home miners (leaving the ones at work as the only ones on) after the halving and was curious if there would be enough people to show a drop in the pool hashing rate?

http://www.spreecast.com/events/where-is-my-money

You will get a C2 with 4 S5 blades (and 4 leftover C1/S3 blades and 1 C1 controller as well as 1 S5 controller).  Just did this, haven't got it running yet, but you do not need any other items to do this except maybe a pair of these http://www.amazon.com/gp/product/B00B46XJRK/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1 as the controller board will block one of the PCIe power connectors on each side (internal boards).  The controller board will have to just sit on top and the two internal cables that connect to the inside blades will be short and tight, but if you take it easy they will fit.  You will have to use the controller board from the S5 as the cables and connectors are different than the ones on the C1.  

Anyone have a link to a step by step guide on upgrading the S3 to the newest CGMiner 4.6.1?

If anyone is looking to upgrade the S3 fans, I can verify these Silverstone fans do fit.  The connector needs the slightest of modification, getting rid of the plastic ridge at the 3 pin point.

http://www.amazon.com/gp/product/B00A460TK6/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

They're basically silent at the stock 500 RPM setting.

Anyone know why the fans listed on BitMain's site for the S3+ are 14038 (which should mean 140mm x 38mm) when they're actually 1238 (12cm x 38mm)?