This buying advice is all about selecting the right components for your new gaming rig. What we've done is we have put together several configurations for different gaming resolutions and we also included links to Geizhals.at with prices, that are being updated automatically.

Gaming PC Full-HD (1920x1080) Low

Intel
Motherboard: Intel Core i3-8100
Processor: MSI H310I Pro
Memory: Corsair Vengeance LPX 8GB DDR4-2666 CL16
Graphics card: Gigabyte GeForce GTX 1050 Ti OC 4GB
Power Supply: Seasonic Focus Gold 450W
Hard drive: Western Digital WD Blue 1TB
SSD: Samsung SSD 860 EVO 250GB
Case: Thermaltake Suppressor F1

AMD
Motherboard: AMD Ryzen 3 1200
Processor: ASRock Fatal1ty AB350 Gaming-ITX/ac
Memory: Corsair Vengeance LPX 8GB DDR4-2666 CL16
Graphics card: Gigabyte Radeon RX 560 Gaming OC 4GB
Power Supply: Seasonic Focus Gold 450W
Hard drive: Western Digital WD Blue 1TB
SSD: Samsung SSD 860 EVO 250GB
Case: Thermaltake Suppressor F1