Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
43
Datasheet Volume Two: Functional Description, February 2014
iMC Functional Description
Execution of a single refresh is tRFC, and it takes 110 – 350 ns according to 
DDR3 density.
iMC is equipped with CLTT temperature monitor and be able to issue auto refresh at the 
2x rate (3.9 us). 
5.3.3.1
Refresh Priorities
There are 3 levels of refresh priorities
1. Opportunistic
2. High-priority
3. Panic
The opportunistic refresh is executed when the scheduler thinks that it can issue it 
without a significant penalty. High-priority is used when a backlog of refresh requests 
has accumulated. At this point the refresh has higher priority than any other 
transaction except for transactions. Panic is when refresh must be executed. Panic-
refresh is in higher priority than transactions.
§
downloadlike
ArtboardArtboardArtboard
Report Bug