C12Friedman :
Your motherboard model is ECS H61 MATX 1.0 95W MB @RTL8111F_A662® which is Micro-ATX (found in your Hardware Maintenance Manual here http://download.lenovo.com/consumer/desktop_pub/ideacentre_h520s_hmm_20120627.pdf - direct PDF link) Most cases will accept a micro-ATX motherboard
Please reply to this, Would the front panel connections be the same on the cooler master elite 430, like would the front panel connectors be put in the same place as that picture you showed me you know that one where all my connections go?
Please reply ASAP!!!
Thanks