Waste of time, it will be the same.
When you say it lights up, do you mean it works as expected, or is it just some pixels activity. In which case it means nothing.
Those Pixels are WS2812 so they take bout 20 mA pre colour per LED.
So 8X32 LEDs is 256 LEDs and at 60mA each the whole thing can take a current of 0.06 * 256 = 15.36 Amps. You can't run this from an Arduino, you need a separate power supply.
So please post a schematic of your circuit. Have you got a series resistor in the data line and large capacitor across the power pins of the display.
I see from your profile you have not read the guidelines here.
So you may want to read this before you proceed:-
how to get the best out of this forum
That means nothing - it is designed to work off 5V so it needs 5V, connecting it up to the 3V3 power supply is only going to overload the power regulator on the Uno and with a 5V signal from the Arduino it will also potentially damage the first LED in the matrix.