XPS 8700 SD Card Intermittent Failure

Has anyone else had an issue where the SD card reader on their desktop tower works for several insertions of and SD card and then fails?

The only method I have found for getting it working again is to shutdown and boot up the machine. A reboot does not work, which leads me to think that the XPS 8700 does a warm reboot (I thought that was gone in modern PCs).