what is the interface of this card

The interface of this card is PCI Express 4.0.

is this card PCIE 4.0 x16

Yes, this card uses PCI Express 4.0 x16 interface.

The GUNNIR Intel Arc B570 can support up to 4 monitors simultaneously. The maximum resolution supported is 7680 x 4320.

The GUNNIR Intel Arc B570 Photon 10G OC Gaming Graphics Card has a Thermal Design Power of 186W and requires an 8-pin power connector.

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GUNNIR Intel Arc B570 Photon 10G OC Gaming Graphics Card (PCIe 4.0, 10GB GDDR6, HDMI 2.1, DisplayPort 2.1) Black

Powerful GPUGUNNIR Graphics Card come with The Newest Intel ARC B570 GPU,With Intel Deep Link technology, Intel CPUs and GPUs work together, Achieve new improvements in performance and efficiency.
Graphics Memory10GB GDDR6 Memory,160-bit, 380Gb/s,19 Gbps graphics memory speed
Convenient ConnectivityCard Interface:PCIE4.0X16.Output Interface:3x DisplayPort2.1 ready, 1x HDMI 2.1,Support 4K Minior.
Advanced Cooling SystemIcicle Multi-Dimensional Cooling System Ensure full blood output of graphics card performance.Double-rotating sail wing fan,Intelligent start-stop technology,makes the heat flow faster.
Suitable for various application scenarios Stream Assist,intelligent load splitting for both live streaming and gaming performance.Advanced Xe Media Engine,Al acceleration beyond creative boundaries.Super encoding,XMX engine,Getting more done in less time.