Caution, English – ASRock Fatal1ty 990FX Professional User Manual
Page 11

11
Fatal1ty 990FX Professional Series Motherboard
English
CAUTION!
1. ASRock UCC (Unlock CPU Core) feature simplifi es AMD CPU activa-
tion. As long as a simple switch of the UEFI option “ASRock 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 CPU only, and in addition, not every AM3 
CPU can support this function because some CPU’s hidden core may be 
malfunctioned.
2. This motherboard supports Untied Overclocking Technology. Please read
“Untied Overclocking Technology” on page 41 for details.
3. This motherboard supports Dual Channel Memory Technology. Before
you implement Dual Channel Memory Technology, make sure to read the 
installation guide of memory modules on page 16 for proper installation.
4. Whether 2100MHz memory speed is supported depends on the AM3/
AM3+ CPU you adopt. If you want to adopt DDR3 2100 memory module 
on this motherboard, please refer to the memory support list on our web-
site for the compatible memory modules. 
ASRock website: http://www.asrock.com
5. Due to the operating system limitation, the actual memory size may be
less than 4GB for the reservation for system usage under Windows
®
7 /
Vista
TM
/ XP. For Windows
®
64-bit OS with 64-bit CPU, there is no such
limitation.
6. For microphone input, this motherboard supports both stereo and mono
modes. For audio output, this motherboard supports 2-channel, 4-chan-
nel, 6-channel, and 8-channel modes. Please check the table on page 5 
for proper connection. 
7. F-Stream is an all-in-one tool to fi ne-tune different system functions in a
user-friendly interface, which currently includes Hardware Monitor, Fan 
Control, Overclocking, OC DNA, Mouse Polling and IES. In the Hardware 
Monitor mode, F-Stream shows the major readings of your system. In 
Fan Control mode, F-Stream shows the fan speed and temperature for 
you to adjust. In Overclocking Control mode, F-Stream allows you to 
overclock the CPU frequency for optimal system performance. In OC 
DNA mode, you can save your OC settings as a profi le and share them 
with your friends. Your friends can then load the OC profi le in to their own 
system to get the same OC settings. In Mouse Polling mode, F-Stream 
allows you to adjust the mouse polling rate of the Fatal1ty Mouse port to 
add a professional level mouse confi guration. In IES (Intelligent Energy 
Saver) mode, the voltage regulator can reduce the number of output 
phases to improve effi ciency when the CPU cores are idle without sacri-
fi cing computing performance.
