OC with p5b dlx wi-fi // Corsair PC2 6400 // E6400 Allendale

[Adramalech]

Hardware:
p5b dlx wi-fi // Corsair PC2 6400 // E6400 Allendale // Full system watercooller


I try to make OC with 401fsb using this setting:

CPU frequency: 401
Dram Frequency: 801+-
PCI-E Frequency: 100
PCI Clock Sync. Mode: 33.33
Memory Voltage: 2.1
CPU Vcore Voltage: 1.400
FSB Termination Voltage: 1.450
MB Vcore: 1.65
SB Vcore: 1.60
Ratio CMOS: 7
5-5-5-18-4-35-10-10-10-10
Static Read Control: Faster

works fine with temps stable in 30 degrees but whhen i go stress CPU and RAM with ORTHOS give me errors.what can i do?

[strad]

here's my OC

e6400 @3.2GHz

cpu frequency 400
dram frequency 800
pci-e 100
pci clock sync 33.33
vdimm 2.0
vcore 1.275
fsb termination 1.2
NB vcore 1.25
SB vcore 1.5
ICH chipset 1.057

no link width issues

cannot drop the vcore by any more (orthos errors)

temps are 45/46 idle 58/59 load

[Blknoel]

Switch Static Read to Disable, don't use "Faster"
Up a bit of Vdimm to about 2.25v
For that FSB, you may not need 1.65v on NB
Last, try to run at native multiplier, so it's 8 for E6400. This helps reduce the strain on NBCC.


Test it to see if it's stable.

[sluzbenik]

Someone needs to make this a sticky - it has been discussed in the P5B Problems and Fixes thread.

Did you notice your subtimings, when you set SPD manually, all default to 10-10-10-10? Under AUTO, the mobo reads the SPD correctly, but when you switch to Manual to tweak, those subtimings default to 10-10-10-10 which will result in instability even when not overclocked.

Some of us petitioned Asus and Corsair to get their act together and fix this problem (as far as I know it only occurs with Cas 5 RAM, not the faster C4 stuff) but they threw the problem back in each other's laps.

See this thread at Corsair's support forums.

The correct timings should be: 5-5-5-12 6-42-3-11-5-14

You can verify this with Memset. For some reason Corsair refused to give us their verified subtimings, so we have to rely on Memset. All I can say is that non-overclocked, I would get memory errors with Memtest within an hour. With these timings I have run Memtest for 8 hours without an error. Overclocks are much more stable.

Please write to Asus and Corsair about this - maybe if enough us continue to complain they will fix this in the next BIOS release.

[Adramalech]

i read all your posts and now is stressing the CPU and RAM, temperatures is in 32 degrees stable. but i need check 1 thing, what is the best voltage for CPU Vcore?
I put also fsb 410 and Dram freq in 820mhz.

if someone get 438fsb x8 send me your configuration because i want this fsb too

[Lestat]

every cpu is different.
no two systems will need the same configuration.

my E6600 takes ALOT less volts than your does.
mine does 3.6ghz @ 1.28v but i bet your cpu defualts isnt 1.28..

YOU have to test, no one can send you anything and make it work. your hardware is very different.

[Adramalech]

Someone needs to make this a sticky - it has been discussed in the P5B Problems and Fixes thread.

Did you notice your subtimings, when you set SPD manually, all default to 10-10-10-10? Under AUTO, the mobo reads the SPD correctly, but when you switch to Manual to tweak, those subtimings default to 10-10-10-10 which will result in instability even when not overclocked.

Some of us petitioned Asus and Corsair to get their act together and fix this problem (as far as I know it only occurs with Cas 5 RAM, not the faster C4 stuff) but they threw the problem back in each other's laps.

See this thread at Corsair's support forums.

The correct timings should be: 5-5-5-12 6-42-3-11-5-14

You can verify this with Memset. For some reason Corsair refused to give us their verified subtimings, so we have to rely on Memset. All I can say is that non-overclocked, I would get memory errors with Memtest within an hour. With these timings I have run Memtest for 8 hours without an error. Overclocks are much more stable.

Please write to Asus and Corsair about this - maybe if enough us continue to complain they will fix this in the next BIOS release.

In my MemSet is 5-5-5-12 5-42-3-11-5-14 and not 5-5-5-12 6-42-3-11-5-14 :P

I put my fsb at 413 and after 3hours a have a error in orthos, but can i stay in this fsb or put more if have errors in orthos?

[D_Nyholm]

Is there anyway to get the subtimings for other RAM? Any idea where it might be posted?? Patriot PC6400