help for OC stability

Geekazoid · 15 Jul 2009 at 20:01

ok this is starting to get annoying....

my system runs stable as a rock with these settings...

BLCK 200
Vcore 1.3
QPI-VTT 1.33
QPI Link X36 at 7.2ghz
RAM at 6X 1200mhz
Unicore frequency at 13X run at 2.6ghz

however the ram is running blow rated clockspeed when i ramp up the ram..

8X at 1600mhz
and raising the uncore frequency to 3.4ghz
setting the DDR voltage at 1.5v

the system becomes unstable and fails in the second pass in Intel Burn test..

so its deffo the RAM do you recommend that i increase the ram voltage or am i making a mistake with the uncore frequency as i take it uncore should be X2 your ram speed....

thank you for any suggestions....

Geekazoid · 15 Jul 2009 at 22:21

^^

anyone?

[edit] i moved uncore to 3.2ghz and set the DRAM voltage to auto still is unstable under Intel Burn Test...

game4it · 16 Jul 2009 at 00:26

I'm not familar with the gigabyte bios but your ram needs 1.65 volts when running at 1600mhz and you dont mention with timings your setting for it either.
They should be at CL 8-8-8-24 when at 1600mhz.
Try those settings and if your still failing IBT put your Oc back to stock and run the ram at rated speeds/volts/timings and try IBT again plus memtest to rule out the ram as not being faulty.

Geekazoid · 16 Jul 2009 at 01:55

ok

my currently set timings are

CAS Latency Time 9
tRCD 9
tRP 9
tRAS 28
and Command Rate (CMD) 2

all others are auto

if i follow your timings what shall I change Command Rate (CMD) into?

Also to add i loverd my Vcore slowly from 1.3000 to 1.2500V and is stable with the above settings (ram downclocked 1200mhz).... Core Voltage in CPU-Z when Intel burn Test is running shows 1.200 and 1.216V (switches between the two). is this normal? can i go lower? is it dangerous for my chip if i lower the Vcore too much?

P.s i have lowerd Vcore without touching anyother voltage or setting...

boldenc · 16 Jul 2009 at 02:05

make sure to set your ram voltage manually to 1.64v ~ 1.66v

Geekazoid · 16 Jul 2009 at 02:11

thanks yup i will set it manually now. do you know what Command Rate should be??? its set on 2 if i change my timeings do i need to touch that?

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this company has free shipping to anywhere in the world and they guarantee delivery to Australia. I heard that sling shots
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boldenc · 16 Jul 2009 at 02:17

haha it is a spam bot damn it

for CMD, I use 1T myself, you memory should be capable of 1T too

Geekazoid · 16 Jul 2009 at 02:21

cheers bud for that i change it tomorrow and see how stable it is as now im littely falling asleep on damn keyboard gonna hit the sack

Geekazoid · 16 Jul 2009 at 22:26

ok...

changed the settings and tested it today solid as a rock so well happy now im gonna see how low Vcore can i get away with.. im at 1.2500 volts stable watch this space...

BigBruiserAl · 16 Jul 2009 at 23:36

uncore should be twice the mem divider+1 so 8 divider should uncore 16+1

or have i misunderstood something?

mmj_uk · 17 Jul 2009 at 00:21

DDR1600 is not offically supported for i7 so chances are your CPU's memory controller is close to its limit.

Geekazoid · 17 Jul 2009 at 01:29

oh man

changed the settings and tested it today solid as a rock so well happy now im gonna see how low Vcore can i get away with.. im at 1.2500 volts stable watch this space...

i spoke too soon... system is unstable as it BSOD me in Intel Burn Test im gonna turn down the DDR clock to 1200 mhz up the cpu voltage to 1.3v and then test again...

boldenc · 17 Jul 2009 at 02:20

Tip: Try to enable Intel Turbo so you get the 21x Multi and use 191BCLK, it will give you same performance as 200x20 but it is much easier to stabilize and use lower vcore compared to 200BCLK

Geekazoid · 17 Jul 2009 at 14:45

right i got the ram stable at 8-8-8-24 at 1600mhz timings but i had to crank up voltage to 1.66v when the settings for my memory are 1.65v would this be ok?

my vcore is at 1.3000v i be dropping this in 2 see what happens

boldenc if i put turbo on and a multi of 21X and use 191 BLCK would i need to chance anything els??? e.g. QPI-VVT voltage or QPI Link

boldenc · 17 Jul 2009 at 15:14

Geekazoid said:
right i got the ram stable at 8-8-8-24 at 1600mhz timings but i had to crank up voltage to 1.66v when the settings for my memory are 1.65v would this be ok?

my vcore is at 1.3000v i be dropping this in 2 see what happens

boldenc if i put turbo on and a multi of 21X and use 191 BLCK would i need to chance anything els??? e.g. QPI-VVT voltage or QPI Link

yes 1.66 is fine, real value is around 1.64v, you can check it in PC Health, it will show you the current voltage used.

you have to try and check stability, but for sure 21x191 use lower vcore and maybe you can lower QPI/VTT and memory voltage as well.

Geekazoid · 17 Jul 2009 at 16:45

???? what the

ok this is getting silly i ran my memory at 8-8-8-24 1600mhz with DRAM 1.66v and uncore at 16x unstable in intel burn test (cpu at 1.3v)

so i loosened the timings 9-9-9-28 1600mhz with dram on 1.66v uncore on auto (unstable in intel burntest)

sometimes when running intel burn test the system just restarts no BSOD or lockups just simple restart and i have switched off auto restart in windows so i see BSOD errors but yet the system while testing with Intel burn test simply restarts.....

this is getting weird and annoying any help is welcome