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Intel
®
82854 Graphics Memory Controller Hub (GMCH)
90 D15343-003
27:24 Read Counter Based Power Throttle Control (RCTC): These bits select the Counter based
Power Throttle Bandwidth Limits for Read operations to system memory.
R/W, RO if Throttle Lock.
0h = 85%
1h = 70%
2h = 65%
3h = 60%
4h = 55%
5h = 50%
6h = 45%
7h = 40%
8h = 35%
9h = 30%
Ah = 20%
B-Fh = Reserved
23:20 Write Counter Based Power Throttle Control (WCTC): These bits select the counter based
Power Throttle Bandwidth Limits for Write operations to system memory.
R/W, RO if Throttle Lock
0h = 85%
1h = 70%
2h = 65%
3h = 60%
4h = 55%
5h = 50%
6h = 45%
7h = 40%
8h = 35%
9h = 30%
Ah = 20%
B-Fh = Reserved
19:16 Read Thermal Based Power Throttle Control (RTTC): These bits select the Thermal Sensor
based Power Throttle Bandwidth Limits for Read operations to system memory.
R/W, RO if Throttle Lock.
0h = 85%
1h = 70%
2h = 65%
3h = 60%
4h = 55%
5h = 50%
6h = 45%
7h = 40%
8h = 35%
9h = 30%
Ah = 20%
B-Fh = Reserved