ASRock 990FX Extreme9 manual

CAUTION!

1.ASRock UCC (Unlock CPU Core) feature simplifies AMD CPU activation. As long as a simple switch of the UEFI option “AS- Rock UCC”, you can unlock the extra CPU core to enjoy an instant performance boost. When UCC feature is enabled, the dual-core or triple-core CPU will boost to the quad-core CPU, and some CPU, including quad-core CPU, can also increase L3 cache size up to 6MB, which means you can enjoy the upgrade CPU performance with a better price. Please be noted that UCC feature is supported with AM3/AM3+ CPU only, and in addition, not every AM3/AM3+ CPU can support this function because some CPU’s hidden core may be malfunctioned.

2.Whether 2450/2100MHz memory speed is supported depends on the AM3/AM3+ CPU you adopt. If you want to adopt DDR3 2450/2100 memory module on this motherboard, please refer to the memory support list on our website for the compatible memory modules.

ASRock website: http://www.asrock.com

3.Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage un- der Windows® 8 / 7 / VistaTM. For Windows® 64-bit OS with 64- bit CPU, there is no such limitation. You can use ASRock XFast RAM to utilize the memory that Windows® cannot use.

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