82830MP Datasheet, PDF (69/159 Pages) Intel Corporation – Intel 830MP Chipset: 82830MP Graphics and Memory Controller Hub (GMCH-M)

Intel^® 830MP Chipset
R
Bits
27
26:24
Description
Write throttling begins based on settings programmed in WPTC. Read throttling is disabled.
1 1 With this setting Thermal Sensor and DRAM Counter mechanisms are both enabled. However,
read throttling is bandwidth counter triggered only while write throttling is thermal sensor or counter
triggered. Both read and write throttling mechanisms use programmed values in the throttle control
registers.
Default Value=00
Reserved
Read Power Throttle Control. These bits select the Power Throttle Bandwidth Limits for Read operations
to System Memory.
23
22:20
R/W, RO if Throttle Lock.
000 = No Limit
(1067 MB/ 1600 MB/ 2133 MB/Sec)
001 = Limit at 74 % ( 789 MB/ 1184 MB/ 1578 MB/Sec)
010 = Limit at 60 % ( 640 MB/ 0960 MB/ 1280 MB /Sec)
011 = Limit at 46% ( 491 MB/ 0736 MB/ 0981 MB Sec)
100 = Limit at 36% ( 384 MB/ 0576 MB/ 0768 MB Sec)
101 = Reserved.
110 = Reserved.
111 = Reserved.
Default Value=000
Reserved
Write Power Throttle Control. These bits select the Power Throttle Bandwidth Limits for Write operations
to System Memory.
19:16
15:8
7:0
R/W, RO if Throttle Lock.
000 = No Limit
(1067 MB/ 1600 MB/ 2133 MB/Sec)
001 = Limit at 74 % ( 789 MB/ 1184 MB/ 1578 MB/Sec)
010 = Limit at 60 % ( 640 MB/ 0960 MB/ 1280 MB /Sec)
011 = Limit at 46% ( 491 MB/ 0736 MB/ 0981 MB Sec)
100 = Limit at 36% ( 384 MB/ 0576 MB/ 0768 MB Sec)
101 = Reserved.
110 = Reserved.
111 = Reserved.
Default Value=000
Reserved
Global DRAM Sampling Window (GDSW): This eight bit value is multiplied by 4 to define the length of
time in milliseconds (0-1020) over which the number of OctWords (16 bytes) read/written is counted and
Throttling is imposed.
Default Value=00000000.
Reserved
298338-001
Datasheet
69