Apple 661-7158 logic board for iMac 27-inch desktop systems, featuring integrated Intel Core i5 quad-core processor running at 3.2GHz with 2GB GDDR dedicated graphics memory. This motherboard handles CPU, memory, storage, and display connectivity for the 27-inch iMac form factor, supporting up to 32GB system RAM and PCIe-based storage expansion. Compatible with iMac Mid-2011 models and includes onboard graphics processing suitable for productivity, office applications, and light content creation workflows. Refurbished unit, tested and guaranteed. Available via quote.