QG5000XSL9TH Datasheet, PDF (332/458 Pages) Intel Corporation – Intel 5000X Chipset Memory Controller Hub (MCH)

Functional Description
THRMTHRT by 2. By design THRMTHRT can never be below THRTHI. If the new
THRTHI is greater than THRMTHRT, then the algorithm will reset THRMTHRT to
THRTHI & the staircase function can no longer be used since the bottom (aka
ceiling) of THRTHI has already been reached as defined by the following equation
extracted from Figure 5-13.
THRMTHRT = max(THRMTHRT - 2, THRTHI)
5.3.12.13 Disabling Closed/Open Loop Throttling
The following registers in the Intel 5000P Chipset can be initialized to disable throttling
(open/closed) if software desires to turn off throttling.
• THRTCTRL.THRMHIUNT = 0 /* This forces the Intel 5000P Chipset to ignore
temperature for closed loop */
• THRTHI.THRHILM = 0 (or 168d)
• THRTHI.THRMIDLM = 0 (or 168d)
• THRTLOW.THRLOWLM = 0 (or 168d)
• GBLACT.BLACTLM = 0 (or 168d) /*Above changes force Open loop throttling to be
off */
Table 5-10. Global Activation Throttling BW allocation as a function of GBLACTLM for a
16384**1344 window with MC.GTW_Mode=0 (normal)
G B LA CT.
# of
GBLACTLM Activates
0 unlimited
1
65536
2 131072
3 196608
4 262144
5 327680
6 393216
7 458752
8 524288
12 786432
16 1048576
20 1310720
24 1572864
28 1835008
32 2097152
36 2359296
40 2621440
44 2883584
48 3145728
64 4194304
72 4718592
80 5242880
96 6291456
128 8388608
144 9437184
160 10485760
168 11010048
% BW
allowed
BW per sys BW , 1 sys BW 2 sys BW 4
DIMM GB/s DIMM/ch DIMM/ch DIMM/ch
0.60%
1.19%
1.79%
2.38%
2.98%
3.57%
4.17%
4.76%
7.14%
9.52%
11.90%
14.29%
16.67%
19.05%
21.43%
23.81%
26.19%
28.57%
38.10%
42.86%
47.62%
57.14%
76.19%
85.71%
95.24%
100.00%
0.03
0.06
0.10
0.13
0.16
0.19
0.22
0.25
0.38
0.51
0.63
0.76
0.89
1.02
1.14
1.27
1.40
1.52
2.03
2.29
2.54
3.05
4.06
4.57
5.08
5.33
0.13
0.25
0.38
0.51
0.63
0.76
0.89
1.02
1.52
2.03
2.54
3.05
3.56
4.06
4.57
5.08
5.59
6.10
8.13
9.14
10.16
12.19
16.25
18.29
20.32
21.33
0.25
0.51
0.76
1.02
1.27
1.52
1.78
2.03
3.05
4.06
5.08
6.10
7.11
8.13
9.14
10.16
11.17
12.19
16.25
18.29
20.32
0.51
1.02
1.52
2.03
2.54
3.05
3.56
4.06
6.10
8.13
10.16
12.19
14.22
16.25
18.29
20.32
332
Intel^® 5000X Chipset Memory Controller Hub (MCH) Datasheet