Thank you for your question. I am Shefin and I look forward to helping you with your issue today.
Either use HDMI splitter, if you just want two HDMI ports. You can purchase it from the link below.
However, it is better to a graphic card with two HDMI ports.
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S H E F I N
Use a graphics card: https://www.amazon.com/s?rh=n:284822,p_n_feature_keywords_browse-bin(###) ###-####/p>
I need to check your PC to ensure it will work when did you buy it.
If your desktop has HDMI and a DVI port, you can often use a DVI to HDMI adapter, they're available at Wal-Mart and other common stores, some PC's don't allow dual output on their integrated graphics cards, but if yours is a dedicated card, you can do this. If you'd prefer not to use an adapter, then another dedicated graphics card would need to be purchased. Please let me know if you'd like further assistance.