Best Upgrade

resonancesoul

Hello.  I purchased the unit below 5 years ago and it's still going strong!  I was wondering, however, given the listing below, what would be recommended as the easiest upgrade within the unit to offer more speed.  Thanks so much!
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1 x Skylake CS-80 NoFan Fanless PC | 1151 - $2,422.00

SKU: pc-cs-80-fanless-skylake

    Fanless ATX Case: NoFan CS-80 Fanless Tower Case

    Fanless CPU Cooler: NoFan CR-95C All Copper Fanless CPU Cooler

    Motherboard: Asus Z170-Deluxe (1151/Skylake) Motherboard

    CPU: Intel i7-6700k Skylake (Quad-Core, 4.0 Ghz, 16 lanes, 91w)

    Fanless Power Supply: Silverstone NightJar SST-NJ520 (520W)

    DDR4 RAM: 32GB DDR4 Kingston 2133 (4x8GB)

    Operating System: Windows 10 Home (64bit) (Up to 128GB RAM)

    Quiet System Drive: Samsung 850 Evo 250GB SSD (Solid State Disk)

    Heatpiped Video Card: Custom Fanless Heatpiped GeForce GTX 750 2GB (1x DP 1.2, 1x HDMI 1.2, 1x DVI-I)

    Sound Card: Asus Xonar Essence STX (7.1 Channel) (24bit/192KHz)

JS_MC

Hello @resonancesoul, and welcome to the Community!

I'm not familiar with the NoFan CS-80, however, from the parts list, it looks like the easiest way to give you more performance would be to upgrade your GPU.  Your PSU being only 520W may limit the processing power of your GPU. 

I'd recommend something like an RX 5600 XT or similar.  Upgrading your GPU will give you the most FPS performance increase.

Hope this helps! Let us know if you have any other questions or concerns.