I originally built this PC in Nov 2009 with a Core-i7 950 CPU and a ASUS P6T Deluxe V2 LGA 1366 Intel X58 MoBo. There have been a few upgrades along the way. My original EVGA GTX 295 FTW Edition with a lifetime warranty died and was replaced with a GTX 490. My original RAID 0 boot drive utilizing 10K RPM Velociraptor drives was upgraded to a Samsung 840 EVA SSD. These are just a few things that changed since then.
Fast forward to Nov 2015 and its time for an overhaul. I chose the 5820K because i preferred the 6 cores over 4. I do a bit of video encoding and having more processing power was necessary.
It was a bit hard to pick a MoBo and went for the ASRock because i felt that it was the best bang for my buck.
I chose the Sapphire R9 390 because it wasn't the most expensive and it wasnt the cheapest. It had great reviews, 8GB RAM, could support 3 monitors. etc. I'm not that big on gaming now as I have an 8 month old but wanted to make sure the card could handle anything i threw at it.
The Samsung 950 Pro is my OS drive, and the 840 Evo is now used as my default video encoding output device.
My build scored a 5256 on Passmark (http://www.passmark.com/baselines/V8/display.php?id=50200743431) with no overclocking to any device. I feel like the components last longer if they are not stressed through overclocking as an attestation by my 6 year old i7-950 which is still in working condition.
I stress tested the build with Prime 95 and temps were great.
Pretty happy with the upgrade.