Pictures are taken by Voltarea ® as an example only, condition may vary and described in listing
Despite the popular myth it’s not possible to predict exactly operating time of a chip based on chip quality or even part revision.
The real time that chip will serve is based on a way the projector will be used. If used with no overheating of a projector the chip will work perfectly for many years.
DMD chip created by Texas Instrument and designed to work up to 15 000 hours. So even used chip is able to work for a long time when used appropriately. Dead pixels appear because of an overheating of a chip.
So make sure to check fans and cooling system, to use quality thermal paste and remove dust from projector when replacing a chip.