RPGs where you actually get to be a big bad overlord are few and far between. Apart from Overlord that is, off the opt of my head. Tyranny is Obsidian once more taking a unique approach to a well established RPG genre; this time the top-down isometric cRPG style inspired by the likes of Baldur's Gate.

Where Pillars of Eternity was resolutely traditional, Tyranny casts the player as a force of evil in a world which has already been conquered. Good has been vanquished and the Overlord rules over his armies with an air of ruthlessness. So far the finer details have yet to be revealed, but we already have our evil mitts on the minimum system requirements for Tyranny. 

Tyranny Minimum System Requirements

• OS: Windows 7 64-bit 
• CPU: Intel Core 2 Quad Q9505 2.83GHz or AMD Athlon X4 840 3.4GHz
• RAM: 4 GB System Memory
• GPU RAM: 1 GB Graphics Memory
• GPU: Nvidia GeForce GTS 450 or AMD Radeon HD 5770 1024MB

Tyranny Predicted Recommended System Requirements

• CPU: Intel Core i5-2400 3.1 GHz or AMD Phenom II X6 1100T  3.3 GHz
• RAM: 8 GB RAM
• GPU: Nvidia GeForce GTX 570 or AMD Radeon HD 7790

Firstly I should point out the predicted system requirements for Tyranny have basically been plucked straight from Pillars of Eternity's recommended specs. The minimum requirements for Tyranny are in fact quite a bit more demanding than Pillars, but we can't see those recommended specs not being extremely capable of playing an isometric RPG. 

Take a peek at Tyranny's minimum system requirements and you'll see it leans heavily on CPU-power more than anything else. There isn't a great deal for a graphics card to do in Tyranny, save perhaps for some particularly intense battles which could see a number of particle effects used as magic spells blast off. Instead Tyranny is going to chug on your processor a little, demanding a fairly decent quad-core CPU. Most PC gamers should have this covered with ease, and I'd expect any i3 processor and above should be plenty capable here. 

As with Pillars of Eternity don't expect there to be a massive deal of graphics options to tweak in Pillars of Eternity so the difference between minimum and recommended is only going to be powering increased resolutions effectively. 

Despite the jump in minimum system requirements, as a rule of thumb if you can play Pillars perfectly fine then Tyranny likewise shouldn't be an issue. 

Remember, you can always check out how well your PC can run the Tyranny Requirements here, where you can check benchmarking and performance from other users. Compare your graphics card to the Tyranny GPU benchmark chart.