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This is a custom-built workstation. I hand-picked all of the components and put them together.
These are specs for the current setup:
CPU: Intel i7 3930k
I chose this CPU for a few reasons. One reason is it's stability when overclocked. The clock speed at factory settings is set to 3.2 GHz. Since I have a sufficient liquid cooling system, I'm able to crank it up to 4.125 GHz, safely. Another reason I chose this CPU is because of it's high performance in both rendering and multi-tasking. I think that having a processor with 6 cores is appropriate for my needs, as most 3D software applications are designed to utilize multi-core CPUs.
Motherboard: Asus Rampage iv Extreme
This motherboard amazing for many technical reasons, including it's engineering and on-board features. I chose this one mainly for it's ability for future expansion. It can hold up to 64GB of RAM, and 3 graphics cards. This motherboard also makes it very easy to tweak and monitor the system's components, such as overclocking, adjusting voltages, temperatures, etc. It also comes with a killer on-board sound card and is plentiful with SATA 3/6gb and USB 2/3 inputs.
Memory: 32gb Corsair Vengeance ram
3D applications are very demanding I wanted to make sure that their performance would not be hindered by a deficiency in RAM. Even though the Asus Rampage motherboard can support 64gb, 32gb is still an overkill but I prefer to have more than less.
Graphics Card: Nvidia Geforce GTX 780
I chose this graphics card for it's incredible design and performance. On top of it's general performance advantages, I mainly utilize it for visualizing pre-final renders with Vray 2.0 RT so I can see a preview of what the lighting and textures will look like. This card also proves itself to be stable while supporting my dual monitors.
Liquid Cooling: Corsair H100i
This component is absolutely crucial. I push my CPU to it's limits pretty often, both though overclocking and excessive rendering. This cooling unit keeps the CPU from overheating by transferring the heat though the liquid cooling system and out the radiator. The LED logo is also aesthetically pleasing to look at through the tower window.
PSU: Cooler Master 1000w Silent Pro Gold
I chose this power supply because of it's high wattage capability and good reviews. All of my components combined do not come close to requiring 1000w, although it provides much room for expansion.
Case: Cooler Master Storm Styker
Besides it's awesome look, I chose this case for a few reasons. My main concerns when browsing through different cases were airflow, expandability, fan control, wire management, and compatibility with my other components. By the end, it came down to this case and the Cooler Master 942. I would be happy with either one, but the Stryker has a few more features such and better dust management. Looking back, I am actually pretty glad that I had chose this one.
Keyboard: Logitech G510s
This keyboard is perfect for 3d applications, and design applications in general. It has 18 (x3) customizable macros keys that that you can link shortcuts and hotkeys to. This means that instead of pressing (for example) Ctrl+Shift+E to extrude a polygon, you can program one of the macros to press those 3 keys for you. This increases workflow tremendously. It also knows which program you are opening, automatically switches to your custom profile, and loads all of the macro keys you created for that program. This keyboard also displays your CPU and RAM usage along with several other useful features.
Mouse: Roccat XTD Kone
This mouse is originally intended for gaming, but I found it to be great for what I do as well. It's laser sensor is top notch (8200dpi) and makes it extremely accurate to work with. It also comes with a weight set that can be installed inside of the mouse to adjust how heavy it feels in your hand. It has onboard memory that can store different profiles and is also aesthetically pleasing with it's customizable led strips.
3D mouse: 3Dconnexion SpaceMouse Pro
After getting used to using this 3D mouse, I don't know how I managed to work without it. It recognizes every slight movement you make in every possible axis. Using this mouse becomes so intuitive after a while that it feels as if it's an extension of your arm. There is really too much to be said about it. Bottom line is: if you are a 3D designer/modeler, you need to have this.
840 Pro Series SSD - 256GB
I use this SSD drive to store windows and all of my programs. It is lightning fast and allows my computer to boot up in about 10 seconds. Programs open up much faster as well.
Western Digital Black Caviar 2TB HD 7200 RPM
I chose this specific drive because of it's good reviews and capacity. While the SSD drive is used for the operating system and programs, I use this one for everything else like project files and other data. There are also many technical reasons why this drive is great, such as SATA 6 Gb/s, dual processing power, dynamic cache, etc.
Dual Display Monitors: 32" LG and 27" Samsung
Having two monitors has made my workflow much more efficient. "Alt-tabbing" between other windows wastes a lot of time and takes away focus. With two monitors, I can share data between applications much easier, and use one monitor for reference pictures while working on the other. After working with a multiple-display setup, I couldn't imagine working with out it.