Intel DZ77GA-70K, Performance Tuning Manual, Page: 22 / 35

Intel DZ77GA-70K / DZ77RE-75K Desktop Board Performance Tuning Guide
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Table 3-1. Resulting CPU Frequency Values for Various Multipliers
Multiplier Resulting
CPU Core
Frequency
(GHz)
Multiplier Resulting
CPU Core
Frequency
(GHz)
35 3.50 50 5.00
36 3.60 51 5.10
37 3.70 52 5.20
38 3.80 53 5.30
39 3.90 54 5.40
40 4.00 55 5.50
41 4.10 56 5.60
42 4.20 57 5.70
43 4.30 58 5.80
44 4.40 59 5.90
45 4.50 60 6.00
46 4.60 61 6.10
47 4.70 62 6.20
48 4.80 63 6.30
49 4.90
Note: Multiplier values 60 thru 63 are only available with 3
rd
Generation core i7
processors.
3.6.3 Check Stability
Establishing stability should be done frequently during the performance tuning
process. A good initial check of system stability is to see if the system can boot into
the operating system. If the system has become unstable, refer to Section 3.4 for
recovery options.
When the system can successfully boot into the operating system, various software
applications can be used to stress the processor, memory, and other
sub-systems .
When processor cores are idle, the Intel Core processors will operate at a reduced
multiplier value. While running in the operating system, the application of a heavy
load will bring all processor cores out of the idle and run them at the multiplier values
selected in the BIOS setup. Heavy loads can be applied by using commonly available
processor and memory stress testing software.
During stress testing, look for erratic software behavior, a blue screen or a system
hang. Any of these are indications of system instability. Solutions to instability
include revising the performance settings described in the various areas of Section 3.5.
For processor stability issues,
revising voltage settings, turbo ratios, system clock
frequency settings or a combination of these changes will be required.