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The GeForce GTX 590 comes with four connectors, three dual-link DVI and one mini-HDMI connector. One card will get you more then sufficient performance to play your games on with three monitors connected. We still receive this question a lot, but dual-link DVI does not mean you can hook up two monitors to one connector. Dual-link means double the signal, that way monitor resolutions over 1920x1200 can be supported. So dual-link DVI means it supports high-resolution or high-refresh rate monitors.
On the backside we see something interesting, two aluminum back plates are secured there to protect and cool down the memory ICs. The card itself has a nice dual-slot solution and the cooling is once again vapor chamber based, in fact the card remains really silent which was a pleasant surprise alright. If you focus on the right top side you can see one SLI connector, yup -- as stated SLI is supported.