Re: AMD Mem Tweak - Read/modify mem timings on the fly - [Vega Friendly] [Win/Linux]
Thank you. This is very useful.
I checked default timing values and indeed it seems that RC = RAS + RP.
For example for Vega 64 defaults... RC(47) = RAS(33) + RP(14)... true
However I am not seeing the same for the other formula RAS = RCD + WR
For example for Vega 64 defaults... RAS(33) = RCDRD(16) + RCDWR(10)... nope.
Anyone have more information on this?
OK... I'm revealing my secrets.
Here are the formulas straight from wikipedia, not hard to find.
If you check ras, rcd, wr, rp, rc you can clearly see the formulas were used.
These values are not hocus pocus. They are calculated according to specific rules.
So if you change ras, you should change rc too and vica-versa
I checked default timing values and indeed it seems that RC = RAS + RP.
For example for Vega 64 defaults... RC(47) = RAS(33) + RP(14)... true
However I am not seeing the same for the other formula RAS = RCD + WR
For example for Vega 64 defaults... RAS(33) = RCDRD(16) + RCDWR(10)... nope.
Anyone have more information on this?
Have you managed to find a good value for RAS to go with the low RCD?
OK... I'm revealing my secrets.
Here are the formulas straight from wikipedia, not hard to find.
If you check ras, rcd, wr, rp, rc you can clearly see the formulas were used.
These values are not hocus pocus. They are calculated according to specific rules.
So if you change ras, you should change rc too and vica-versa