kongasdf
Profi
- Mitglied seit
- 18.07.2017
- Beiträge
- 29
My Platform has a unmatched rule for 4000 15 20 20 1T, tRDWR will be too tight to boot when I tighten tCWL to 12.
The safe value of tRDWR sg/dg is 13, 12 which sometimes crashes during stress tests.
At the same time, notice the difference between the timing of Channel A and Channel B.
To avoid the problems, tRDWR sg/dg are fixed into 13.
Due to lack of experience, I have taken a roundabout route many times.
Another difficulty is tRCD/tRP.
tRCD/tRP depend on the chip itself, and a good chip has a wide voltage and temperature range.
How to find the “Sweet Voltage”? By Experience.
Typically, IMC of Ryzen2 is stronger than Intel's, lower voltage and tighter timings.
Lower voltage means that tRCD/tRP has a wider range of voltages.
tRCD/tRP is sensitive to temperature and voltage.
The voltage of the tRCD is not often within the required range.
Higher temperatures and tighter timings greatly reduce the range of required voltages.
Such as my kits, Upper voltage limit:
CL 15 more than 1.70v, tRCD/tRP 21 needs less than 1.72v; tRCD/tRP 20 needs less than 1.60v.
Lower voltage limit:
CL 15 needs 1.50v, tRCD/tRP 21 needs more than 1.53v; tRCD/tRP 20 needs more than 1.54v.
Most of these kits will get worse at high voltage. Only 2 survived (3.3%).
The safe value of tRDWR sg/dg is 13, 12 which sometimes crashes during stress tests.
At the same time, notice the difference between the timing of Channel A and Channel B.
Min Timings | tRDWR sg | tRDWR dg |
CH A | 12 | 13 |
CH B | 13 | 12 |
To avoid the problems, tRDWR sg/dg are fixed into 13.
Due to lack of experience, I have taken a roundabout route many times.
Another difficulty is tRCD/tRP.
tRCD/tRP depend on the chip itself, and a good chip has a wide voltage and temperature range.
How to find the “Sweet Voltage”? By Experience.
Typically, IMC of Ryzen2 is stronger than Intel's, lower voltage and tighter timings.
Lower voltage means that tRCD/tRP has a wider range of voltages.
tRCD/tRP is sensitive to temperature and voltage.
The voltage of the tRCD is not often within the required range.
Higher temperatures and tighter timings greatly reduce the range of required voltages.
Such as my kits, Upper voltage limit:
CL 15 more than 1.70v, tRCD/tRP 21 needs less than 1.72v; tRCD/tRP 20 needs less than 1.60v.
Lower voltage limit:
CL 15 needs 1.50v, tRCD/tRP 21 needs more than 1.53v; tRCD/tRP 20 needs more than 1.54v.
Most of these kits will get worse at high voltage. Only 2 survived (3.3%).