I see some folks say 4:5 on 1333fsb isn't working and think it's 1:1 but.........
I thought reason why Badaxe 4:5 can clock so much higher is that it is due to the less agressivenss of the MCH settings at 1333fsb to allow fsb to clock higher at least on badaxe... ?
Why else would at 1333fsb strap 1:1 is slower than 1333fsb strap 4:5 for me at same fsb and mem timings on cpu and ram ?
I am on 1333fsb strap and 2x512MB OCZ PC5400 Plat XTC max at around 423-426mhz at 2.2v on badaxe, when i tried 4:5 with 346fsb for 433mhz ram it wouldn't boot so i think 4:5 is indeed working.
i.e.
2x 512MB OCZ PC5400 Plat XTC maxes at 2.2v @423-426mhz 4-4-4-8/15
2x 512MB Corsair PC5400ULv1.5 Fatbody D9 Micron so far at 2.2v @506mhz 4-4-4-15 and still haven't tried higher yet.
Click image for full timings and mem screenshot
At 3649Mhz 9x405fsb and 4:5 506mhz 4-4-4-15 only 8 seconds slower than @3809Mhz (9x423fsb) and ram @423mhz 4-4-4-8 of 15min 05s!
5400ULv1.5 now at 3816Mhz 9x424fsb 4:5 with ram @530mhz 4-4-4-15 at 2.2v
Crazy 530mhz 4-4-4-15 at 2.2v which is 33 seconds faster than @3809Mhz (9x423fsb) and ram @423mhz 4-4-4-8 of 15min 05s
I think reason Badaxe clocks higher is MCH voltage can be raised to 1.725v whereas even stock Asus P5W DH only allows max MCH volts of 1.6v. To me badaxe 1333fsb 4:5 is NOT running 1:1 but indeed 4:5
Update: 1067fsb definitely faster
I wonder if how high fsb you can clock on 1067fsb is memory dependent ? i.e.
on 1067fsb with 2.2v vdimm 1304 bios
2x256MB Centon PC4300 Advance Micron D9 fatties = max 382fsb
2x512MB OCZ PC5400 Platinum XTC = max 378fsb
2x512MB Corsair PC5400ULv1.5 Micron D9 fatties = max 421fsb!
I've hit the limit of 1067fsb strap for 2x512MB PC5400ULv1.5 at 4-4-3-5 at 2.2v. The max is 421fsb. I guess you can subtract 20+ seconds if i had 2x1GB modules hehe.
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