Need some build advice

[Citizen Snips]

Hi everyone,

This is my first upgrade/build since 2009 so I could use some advice. Here are my main motivations for upgrading:

1. I need dual monitors to work from home. My work PC uses dual 24's and I have to remote login via VPN/VNC from within a virtual machine, so I would need 2x27" 1440p to fully view my work desktop without scrollbars from home.

2. I would like to be able to play new FPS games again with max (or near max) settings. Although I plan to buy dual 27" 1440p monitors for work, I would probably only game on one of them because I don't think a single GTX 1080 would give acceptable framerates on a 2x1440p display, plus having the gun/crosshair split across 2 screens would drive me crazy.

3. I want an SSD for the overall speed improvements.

Other than that, I mainly just use my PC for typical/basic stuff like movies, web browsing, office apps, etc.

My main concern is what parts, if any, I should keep from my existing build.

First of all, here is my current build:


PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-920 2.66Ghz Quad-Core Processor
CPU Cooler: Prolimatech Megahalems (No Fans) Fanless CPU Cooler ($79.75 @ Amazon)
Motherboard: EVGA 132-BL-E758-TR ATX LGA1366 Motherboard
Memory: Corsair XMS3 6GB (3 x 2GB) DDR3-1333 Memory
Memory: Corsair XMS3 12GB (3 x 4GB) DDR3-1333 Memory ($56.99 @ Newegg)
Storage: Western Digital Caviar Black 750GB 3.5" 7200RPM Internal Hard Drive
Case: Antec Nine Hundred Two ATX Mid Tower Case
Power Supply: Corsair Enthusiast 650W 80+ Certified ATX Power Supply
Optical Drive: LG GGC-H20L Blu-Ray/DVD/CD Drive
Total: $136.74
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-09-14 11:56 EDT-0400


Note my GPU is an EVGA GTX 260 SC. I guess it was too old to appear in the buildapc database.

Here are what I'm calling my "tier 1" upgrade components, i.e. stuff I know I'm including in the upgrade:

PCPartPicker part list / Price breakdown by merchant

Storage: Samsung 850 Pro Series 256GB 2.5" Solid State Drive ($122.74 @ OutletPC)
Video Card: EVGA GeForce GTX 1080 8GB Superclocked Gaming ACX 3.0 Video Card ($649.99 @ B&H)
Operating System: Microsoft Windows 10 Pro OEM 64-bit ($129.95 @ Amazon)
Monitor: Dell S2716DG 27.0" 144Hz Monitor ($599.00 @ B&H)
Monitor: Dell S2716DG 27.0" 144Hz Monitor ($599.00 @ B&H)
Total: $2100.68
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-09-14 11:58 EDT-0400

Given the above, I'm wondering if I should also upgrade the motherboard, CPU, and RAM. Would there be much benefit to doing so? Do new FPS games benefit much from a CPU newer than an i7 920?

I'm currently running the i7 920 at stock speeds given that my GPU is outdated anyway but could overclock the CPU if there would be a huge benefit. I really don't want to spend hours trying to get the CPU stable, however.

The only other benefits I can think of in going to a Z170-based system are: SATA3 vs SATA2, DDR4 vs DDR3, and USB3 vs USB2. Based on my research the first two provide a small performance improvement, and the third I don't really care about as I don't currently transfer much data over USB.

Here are the components I selected if I decide to make these upgrades:

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor ($324.89 @ OutletPC)
CPU Cooler: Noctua NH-D15 82.5 CFM CPU Cooler ($88.33 @ OutletPC)
Motherboard: EVGA Z170 FTW ATX LGA1151 Motherboard ($143.98 @ Newegg)
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory ($76.99 @ Newegg)
Total: $634.19
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-09-14 11:59 EDT-0400

I can afford those upgrades if necessary, but I don't want to buy things that aren't going to result in much improvement.

Thoughts?