# Illumina specifications for the NovaSeq X Series
\*\*Specifications for the NovaSeq X Series Instruments
Table 1. Data Specifications\*\*\
**Table 2. Read Specifications**\
**Table 3. Q30 Scores**\
**Table 4.** **Run Time Estimates**\
Run time includes Automated Cluster Generation, Sequencing, Automated Post-Run Wash, and Base-Calling.
**IMPORTANT NOTE**: The times listed in Table 4 are for single or dual Flow Cell runs using the same type of flow cell. Mixing flow cell types will result in longer run times for the smaller flow cell type. For example, running a 10B Flow Cell paired with a 25B flow cell will result in a 10B run time of around 38 hours. See Table 5 for additional estimated times for mixed flow cell types.
**Table 5**: Detailed Run Time Estimates by Flow Cell, Cycle Number and Control Software version. For additional details, see NovaSeq X Series Control Software v1.3 [Release Notes](https://support.illumina.com/downloads/novaseq-x-series-software-suite-v1-3.html).
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