Micro-ATX (mATX), measuring approximately 24.5 cm x 24.5 cm. Expansion Slots: 1x PCI Express x16 1x PCI Express x1 2x Legacy PCI slots Storage: 4 to 5 SATA connectors (supporting SATA III). Ports & Connectivity
4 slots supporting up to 32 GB of DDR3 non-ECC unbuffered memory. lenovo is7xm rev 10 motherboard manual
Since Lenovo does not publish a standalone PDF specifically titled "IS7XM Manual," you must use the model-specific guides for the chassis it belongs to. Micro-ATX (mATX), measuring approximately 24