So I know this isn’t exactly what you asked for, but I cant help myself sometimes. I enjoy building PC’s and looking up new builds. There are a number of other websites you can visit to customize your own PC’s within a set of given compatible parts. I have purchased a laptop for my sister and a gotten a handful of my friends to purchase PC’s from CyberPower’s website. Never had any problems with them and everyone I know who purchase from them seems to be happy with their PC’s and customer service. I am not affiliated with them in any way, I am simply a satisfied customer.
Here is link (below) to a build that I came up with for just under $900 USD that should play Rust and pretty much any other game you throw at it on medium to high settings at around 60FPS. It also has a little extra in the power supply department for upgrading to a new video card down the line and adding more hard drives or optical drives. Keep in mind that this build comes with ZERO accessories such as Monitors, Keyboard/Mice, Speakers (I am assuming you have these already). You can also still play with any of the choices I made to change this build to better suite your needs/style. You can also change the Operating System to Windows 7 Home Premium (64-bit) at no extra cost (3rd tab Software & Services) if you prefer that over Windows 8.1 (64-bit).
(This build is only saved for 7 days as of this posting, after that the link is no longer what I chose)
For those not wanting to click the link, here are the basics:
Gaming Chasis: CYBERPOWERPC X-Saber w/ USB 3.0, Large Side Panel Window (Black with Blue LED)
Extra Case Fans: Maximum 120MM Case Cooling Fans for your selected case
CPU: Intel® Core™ i5-4460 3.20 GHz 6MB LGA1150
CPU / Processor Cooling Fan: * Cooler Master Hyper 212 EVO CPU Cooler w/ PWM fan - Efficient Cooling Performance
Motherboard: GIGABYTE Z97-D3H ATX w/ Realtek GbLAN, 2 PCIe x16, 2 PCIe x1, 3 PCI, 6x SATA 6Gb/s (Pro OC Certified)
RAM / System Memory: 8GB (4GBx2) DDR3/1866MHz Dual Channel Memory (Corsair Vengeance)
Video Card: MSI Twin Frozr NVIDIA GeForce GTX 660 2GB GDDR5 PCIe 3.0 x16 Video Card (Single Card)
Power Supply: 750 Watts - Thermaltake SMART Series SP-750PCBUS 80 PLUS BRONZE Certified Active PFC Power Supply
Hard Drive: 1TB Western Digital Caviar Blue SATA-III 6.0Gb/s 7200 RPM HDD (Single Drive)
Optical Drive: 24X Double Layer Dual Format DVD±R/±RW + CD-R/RW Drive (BLACK COLOR)