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Old 05-23-2019, 10:19 PM
A Computer Guy A Computer Guy is offline
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Quote:
Originally Posted by A Computer Guy View Post
If you have an ASRock X470 Master SLI/AC you may get improved memory compatibility with the P3.20 version BIOS/UEFI update including AGESA 0.0.7.2.

Running CMK16GX4M2A2400C16 (2 kits) 16-16-16-39-55-1T, 2400MHz @1.2v

Old P1.9 BIOS/UEFI with AGESA 1.0.0.6
I was not able to use the original timings when overclocked and occasionally memory retraining would kick-in again on boot every now and then.
20-20-20-48-68-1T, 2933MHz @1.35v, SOC@0.920v (oc stable, 4 sticks)

New P3.20 BIOS/UEFI with AGESA 0.0.7.2
I was able to use the original timings while overclocked and the memory retraining problem is now gone.
16-16-16-39-55-1T, 2933MHz @1.35v, SOC@0.920v (oc stable, 4 sticks)

Did anyone else notice any memory improvements with their Ryzen boards with AGESA 0.0.7.2 updates?

If anyone is interested here are instructions for building a simple spreadsheet to calculate memory timings.

Columns/Formulas:

Column A: "Old Freq."
Column B: "Description"
Column C: "Old Timing"
Column D: "Old NS" (format to 4 decimals)
- formula: "=(1/(A2/2)*C2)*1000"
Column E: "New Freq."
Column F: "Calc. Timing" (format to 4 decimals)
- formula: "=D2*(E2/2)/1000"
Column G: "New Timing" (format to zero decimals)
- formula: "=ROUND(F2, 0)"
Column H: "Try Timing"
Column I: "Try NS"
- formula: "=(1/(E2/2)*H2)*1000"
Column J: "Delta NS"
- formula: "=I2-D2"

Instructions:
- Fill out the columns A, B and C for frequency, description, and timings. (info from your memory specifications)
- The "Old NS" will fill in with timings in nanoseconds.
- You should be able to compare this to your memory specification nanosecond timings.
- Fill out the "New Freq." column with the desired frequency for your overclock.
- The "New Timing" column should approximate timings that you may be able to use at the higher frequency.
- From there you can try reducing the timings and see the the change in nanoseconds.

Sample:

Code:
-----|-------|-----|----------|------|----------|-----|-----|-----------
A    | B     | C   | D        | E    | F        | G   | H   | I
-----|-------|-----|----------|------|----------|-----|-----|-----------
2400 | CAS   |  16 |  13.3333 | 2933 |  19.5533 |  20 | 14  |   9.5465
2400 | RDC   |  16 |  13.3333 | 2933 |  19.5533 |  20 | 17  |  11.5922
2400 | RP    |  16 |  13.3333 | 2933 |  19.5533 |  20 | 17  |  11.5922
2400 | RAS   |  39 |  32.5000 | 2933 |  47.6613 |  48 | 39  |  26.5939
2400 | RC    |  55 |  45.8333 | 2933 |  67.2146 |  67 | 55  |  37.5043
2400 | tRFC1 | 420 | 350.0000 | 2933 | 513.2750 | 513 | 420 | 286.3962

Last edited by A Computer Guy; 05-23-2019 at 10:27 PM.
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