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trouble overclocking f1-3200usu 2GBNS

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i am having probs with this mem. it works fine working with a 300mhz under a 5/6 or 7/10 divider but once i try to raise the mem mhz beyond 220mhz, all hell breaks loose.

 

for 250mhz

memtest gives me errors like totally scrambled text or things like 198% Pass 199% test pass.

 

199%?

 

230/240mhz gives me 500+ errors on each pass.

 

i am very surprised as my old rams 2x1GB corsair VS rams using uccc chips like the above, can clock stable at 250mhz, booted to 270mhz before.

 

 

 

DRAM Configuration Settings:

HTT= 250

DRAM Frequency Set............................  -  200mhz

Command Per Clock (CPC).......................  -  Enable

CAS Latency Control (Tcl).....................  -  3

RAS# to CAS# delay (Trcd).....................  -  4

Min RAS# active time (Tras)...................  -  8

Row precharge time (Trp)......................  -  4

Row Cycle time (Trc)..........................  -  12 Bus Clocks

Row refresh cyc time (Trfc)...................  -  15 Bus Clocks

Row to Row delay (Trrd).......................  -  03 Bus Clocks

Write recovery time (Twr).....................  -  03 Bus Clocks

Write to Read delay (Twtr)....................  -  01 Bus Clocks

Read to Write delay (Trwt)....................  -  03 Bus Clocks

Refresh Period (Tref).........................  -  3120 Cycles

DRAM Bank Interleave..........................  -  Enabled



DQS Skew Control..............................  -  increase

DQS Skew Value................................  -  0

DRAM Drive Strength...........................  -   10

DRAM Data Drive Strength......................  -  Level 2

Max Async Latency.............................  -  10.0

DRAM Response Time............................  -  normal

Read Preamble Time............................  -  9.0

IdleCycle Limit...............................  -  256 Cycles

Dynamic Counter...............................  -  disable

R/W Queue Bypass..............................  -  16 x

Bypass Max....................................  -  07 x

32 Byte Granularity...........................  -  Disable(4 Bursts)

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What frequency is the memory and CPU running at when running on those dividers?

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What frequency is the memory and CPU running at when running on those dividers at 300HTT?

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I'd suggest 10 16 on Trc Trfc and 3 3 1 4 on Trrd Twr Twtr Trwt.

 

Also try setting Max Async Latency to 10 and Read Preamble to 8.5

Try setting Drive Strength to Auto.

 

A whole other approach would be to simply set the first six timings to 3 4 4 8 10 16 while leaving the rest on auto. From thereon use A64 Tweaker to tighten up the rest of the timings.

 

My infineon ce5 modules run 244MHz rock solid at pretty neat (3 3 2 8) although they're rated at 3 4 3 8 @250 MHz

 

Try my settings, but stay at your rated 3-4-4-8 timings. Try Trfc at 14 - shouldn't matter to much. 16 should definately be stable.

 

memtimingsfw0.th.jpg

 

Only changes I've done in relation to image is to set Tref to 0908 for 3.9us 233MHz refresh rate.

 

Trtw/Trwt timing at 4 despite 3 might give you a bit more stable system while the performance only degrades very little.

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What frequency is the memory and CPU running at when running on those dividers at 300HTT?

for 300HTT i am using either 7/10 or (the other divider which i cant remember makes the ram run at 183mhz)

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