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DFI UT X58 - tRRD, RTL, tFAW timing discussion. - Page 3 - i4memory.com - different look at memory

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Old 29-04-2009, 06:56 PM   #17
cstkl1
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trying to reduce tWRWR to 4 atm.
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Old 30-04-2009, 03:35 AM   #18
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Interesting about tFAW = tRC on R2E board and RTL Channel C.
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Old 30-04-2009, 03:20 PM   #19
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4/28 bios seems to be more tolerant of very tight subtimings .. so close to sub 9min 32M pi at <3900Mhz!



sub 4000Mhz 32M


Last edited by eva2000; 30-04-2009 at 06:40 PM.
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Old 03-05-2009, 02:18 AM   #20
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i was told by Gary at AT, D0 steppings like lower CPU VTT for stability and high cpu vtt could introduce instability
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Old 03-05-2009, 03:09 AM   #21
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By eva2000 View Post
i was told by Gary at AT, D0 steppings like lower CPU VTT for stability and high cpu vtt could introduce instability
ok.

will be testing a new ut and dk on monday to rule out mobo.
it not solved
then i will head back to square one two months ago.. it was the ram.
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Old 03-05-2009, 05:46 AM   #22
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also i realize that all u guys are running the dominator 2000mhz Cl7 1N with Ht on

eva do u mind posting a 32m 4 proccess HT off.
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Old 03-05-2009, 10:46 AM   #23
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By cstkl1 View Post
also i realize that all u guys are running the dominator 2000mhz Cl7 1N with Ht on

eva do u mind posting a 32m 4 proccess HT off.
Saw your post in XS Gskill Perfect storm thread, so I assume you meant hyper pi with 4 processor and ht off ??

Did 2 runs on fresh Win 7 64bit RC install I did last night. Only change was CPU VTT voltage needed to pass Hyper Pi 8x 32M vs 4x 32M.
  1. 8x 32M Hyper Pi HT Enabled - CPU VTT = 1.44v
  2. 4x 32M Hyper Pi HT Disabled - CPU VTT = 1.47v needed more for 4x32M HT Disabled

RTL value for channel A changed when CPU VTT changed from 1.44v to 1.47v

RTL A/B/C = 56/57/58


RTL A/B/C = 55/57/58


Past bioses and tests, I found memory bandwidth in memtest86+ v2.11 was higher with HT disabled than HT enabled, so could explain why more CPU VTT volts is needed for HT disabled.
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Old 03-05-2009, 12:26 PM   #24
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just wanted a double confirmation

yup seems ht off needs more.

also found seting pwm vtt frequency to increase 30 percent .. u can reduce the vtt.

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