3
28
allocated to the IGP is freed for other use.
2. When installing an ATI PCIe graphics card, SurroundView is disabled by default. Enabling
SurroundView in the BIOS enables the integrated UMA graphics controller, which in turn
makes available up to two additional graphics outputs. When enabling the integrated UMA
graphics controller, system memory will be reallocated.
► Primary Video Controller
This item is used to choose the primary video controller .
Memory Configuration
► DCT Unganged Mode
DCT stands for DRAM Controller.
Ganged refers to the use of both DRAM controllers within a memory controller acting in con-
cert to access memory. For a description of ganged (128-bit DRAM data width) and unganged
(64-bit DRAM data width) DRAM modes :
Ganged channels:
■ DCT channels A and B can be ganged as a single logical 128-bit DIMM.
■
Offers highest DDR bandwidth.
■
Requires both DIMMs in a logical pair to have identical size and timing parameters, both
DCTs programmed identically.
Unganged channels
■ DCT channels A and B operate as two completely independent 64-bit channels (both chan
-
nels operate at the same frequency).
■ Reduce DRAM page conflicts – more concurrent open dram pages.
■ Better bus efficiency.
Burst lengths supported
When both DCTs are enabled in unganged mode, BIOS must initialize the frequency of each
DCT in order.
CMOS Setup Utility - Copyright (C) 1985-2005, American Megatrends, Inc.
Memory Configuration
Memory Configuration
Help Item
DCT Unganged Mode
[Always] This allows selection
of unganged DRAM mode
(64-bit width).
Auto = Ganged mode
Always = Unganged mode
↑↓←→:Move Enter:Select +/-/:Value F10:Save ESC:Exit F1:General Help
F9:Optimized Defaults
[Always]
