Intel I7-900 DESKTOP PROCESSOR - DATASHEET VOLUME 2 Datasheet page 67

Register Description
Device:
Function: 0
Offset:
Access as a Dword
18:15
14:11
10:7
Datasheet
4, 5, 6
80h
tddRdTWr.
Minimum delay between Read followed by a Write to different DIMMs.
0000 = 2
0001 = 3
0010 = 4
0011 = 5
0100 = 6
RW 0
0101 = 7
0110 = 8
0111 = 9
1000 = 10
1001 = 11
1010 = 12
1011 = 13
1100 = 14
tdrRdTWr.
Minimum delay between Read followed by a write to different ranks on the
same DIMM.
0000 = 2
0001 = 3
0010 = 4
0011 = 5
0100 = 6
RW 0
0101 = 7
0110 = 8
0111 = 9
1000 = 10
1001 = 11
1010 = 12
1011 = 13
1100 = 14
tsrRdTWr.
Minimum delay between Read followed by a write to the same rank.
0000 = RSVD
0001 = RSVD
0010 = RSVD
0011 = 5
0100 = 6
RW 0
0101 = 7
0110 = 8
0111 = 9
1000 = 10
1001 = 11
1010 = 12
1011 = 13
1100 = 14
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