Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: PowerColor Video Card (AX R9 Fury X 4GBHBM-DH)
Product description: PowerColor AMD Radeon R9 FURY X 4GB HBM HDMI/3DisplayPort PCI-Express Video Card
Product feature: Chipset: AMD Radeon R9 FURY X, Core Clock: 1050 MHz, Video Memory: 4GB HBM (High Bandwidth Mamory), Memory Clock: 500 MHz (1.0 Gbps), Memory Interface: 4096-bit, Max. Resolution: 4096 x 2160, Input: 2x 8Pin PCI-E Power Connectors, Output: HDMI, 3x DisplayPorts
Product brand: PowerColor
Target attributes: Output Resolution
Answer: attribute: output resolution
value: None
source: None