Help me achieve 2400MHz with samsung green

buzzlightweight · 7 Jul 2012 at 14:12

ok i have read the Samsung thread though...... twice! the rig i am trying to get to 2400MHz is -

3770k
Asrock ITX z77
8GB Samsung green
ax650w corsair psu

i have managed to stabilize 2133MHz @ 9-10-10-21-1T @ 1.56v VTT @ 1.1v 12hrs memtest and 3 passes IBT max.
I only have limited tweaking on this board -

i have no idea what the below do?

the first two options -

odt wr cha & odt wr chb only have three options 1)auto 2)60 3)120

then the other two -

odt nom cha & odt nom chb have 20,30,40,60,120,auto

thats all the info i have but any help would be gratefully recieved

**EDIT**

i had it working briefly last night

but i lost my sub settings and cant get it going again

buzzlightweight · 7 Jul 2012 at 14:20

ok mate thats a start

ty

buzzlightweight · 7 Jul 2012 at 14:26

that would be a negative

i did have it working last night but lost the sub settings

see above

buzzlightweight · 7 Jul 2012 at 20:03

ok as i cant get 2400MHz stable, i can boot in but thats it!, i thought about stress testing my 2133 set up so 5 hours 5 passes no errors.

i think i can tighten the timings but i would love to push for 2400mhz

buzzlightweight · 7 Jul 2012 at 21:16

i dont have vccsa all i have is dram and vtt i tried 1.65v dram and 1.2v vtt the max for both, i dont think its the volts i think its the timings?

buzzlightweight · 7 Jul 2012 at 21:50

wazza300 said:
could be you can use any timings you want,i cant adjust vccsa on my board either but some can and it helps with stability at 2400mhz

could try looser 12-12-12-35 or 38-2t timings

ok will do once iv finished my memtest of new 2133 timings i will try them

ty

buzzlightweight · 8 Jul 2012 at 10:58

all i can tune i listed above, i cant tune my thirds

i cant even get 2200MHz to boot, i think 2133 is my peak

buzzlightweight · 8 Jul 2012 at 12:04

just tested my memory

still looking for 2400MHz

buzzlightweight · 8 Jul 2012 at 12:21

im on z77 mate, tbh i think iv hit the limit of the board (asrock mITX z77), iv read that

10-12-12-31-1T or
9-11-11-28-1T

should be doable with these sticks, i will give those timings a go

buzzlightweight · 8 Jul 2012 at 12:29

um no and no lol

your right without those pesky thirds im done at 2133, going by my setting above would you change any of them to tighten them up?

buzzlightweight · 8 Jul 2012 at 16:18

OK i think i have found my max oc for my ram on this board, i upped the BCLK to 103.1 my volts were upped from DRAM 1.56v to 1.57v and VTT from 1.053v to 1.076v to give me 2199MHz if i went 103.2 (2201MHz) it will not boot so i think this has a brick wall @2200MHz

Below are the results and they have improved over the 2133MHz oc.

buzzlightweight · 8 Jul 2012 at 20:46

ok i have stabilized 2201MHz same volts DRAM 1.57v and VTT i put on auto so 1.053v
(a drop

)

results are a little better

2201MHz

2133MHz

buzzlightweight · 8 Jul 2012 at 20:56

ok resizing now

buzzlightweight · 8 Jul 2012 at 20:59

all done

buzzlightweight · 8 Jul 2012 at 21:28

i dropped back to 103.1 bclk and played with the secondary timings with great results. THIS will be my ram oc

2199mhz bclk 103.1 9-10-10-21-1

2201mhz bclk 103.2 9-11-11-35-1

buzzlightweight · 8 Jul 2012 at 22:57

its the joy of tweaking

i like to tinker

buzzlightweight · 10 Jul 2012 at 17:28

1) save your cpu oc in one of the empty profiles

2) revert everything back to stock values

3) try ocing your ram

i first of all only oc'd to 1866mhz using ocuk's achieved oc

Overclocking Features (Not Guaranteed)

- 1600MHz (7-8-8-24 1N) @ 1.40v
- 1866MHz (9-9-9-27 1N) @ 1.40v
- 2000MHz (9-10-10-28 1N) @ 1.45v
- 2133MHz (10-10-10-28 1N) @ 1.45v
- 2400MHz (11-11-11-28 2N) @ 1.50v
- In our own in house testing we were able to achieve all the above clock speeds on an Asus X79 platform with 4x4GB modules (16GB total) SuperPI Stable too, 32M

then i tried experimenting. i first of all upped the ram voltage to 1.65v and VTT to 1.98v. these are the highest safe volts for IB processors.

you really need to play with the secondary timings to get up to 2133mhz and by the looks of things IF your board allows you to play with thirds then you will be able to look for higher clocks.

once you have found your desired speeds and timings then you need to work on dropping the volts and timings and using memtest86 to test your ram.

i am just finishing a 12 hours test (with no errors), some say you should do it longer but iv been ok with 12 hours memtest and them 3 MAX runs on IBT.

due to my board i am only able to go to 2133mhz but i have upped the bclk to 103.1, this is only really safe on IB. with my bclk set to 103.1 i have achieved a clock speed of 2199mhz 9-10-10-21-1T my secondary timings are

4) once you got your ram oc'd save it to another profile.

5) once you have your ram oc'd then go about oc'ing your cpu again.

6) IF you get your cpu and ram oc'd save that profile. if all else fails at least you have your two saved profiles (cpu & ram)

i hope that helps

buzzlightweight · 10 Jul 2012 at 20:20

8 Pack said:
For 2200mhz those secondary timings are fairly loose to be honest. I am sure I had tighter at 2400 and 2600. Work on TRFC first as this affects perf most, try 121 then 114 then 96 and if possible 88 and 74 although I doubt this. I think 96 may be your best. 74 is like hypers or PSC tight and high VDRAM.

1.98v VTT that will kill your CPU sooner rather than later VTT should not go over 1.25 for these 24/7. Do you mean PLL??? If so what is your VTT or as ASUS call it VCCIO actual setting?

very true, my volts are 1.57v dram and and auto (1.053v) i meant for testing purposes.

i have just had a look at my trfc and it is 128, i read on two IB oc guides that for testing and stability purposes 1.2v is ok but not 24/7, it should be kept at 1.1 for 24/7, i apologise i forgot that bit

i have just finished a 12hr stint on memtest with no errors, i will have a look at my timings another day.

ty for your advise 8pack

buzzlightweight · 10 Jul 2012 at 21:54

ok just going by 8packs advice and changing my tRFC to 114 i have further increased my read/write!!!

DRAM 1.57v
VTT auto (1.053v)

bclk - 103.1
MHz - 2199
timings 9-10-10-21-1T

tWR - 16
tRFC - 114
tRRD - 7
tWTR - 8
tRTP - 8
tFAW - 24
tCWL - 8

below are the results before i changed my tRFC from 148 to 114

(tRFC 148)

(tRFC 114)

i will run memtest again when i go to work tomorrow to test stability, cheers 8 pack

buzzlightweight · 24 Jul 2012 at 06:47