Help me achieve 2400MHz with samsung green

@ buzzlightweight

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I'm happy you're happy.

Hopefully you now get on with using the PC.

In reality overall you're gaining very small amounts of extra performance with all this tweaking.
 
someone help me please :)

right I have a Z77-UD3H Gigabyte board, I have OC'd the CPU fine etc. However when I try the ram it doesn't do anything, I have input the values to get it to 2ghz saved and exited the bios, but it doesn't change the ram at all, I have done it loads of times reset cmos etc etc, but its like something is in auto and I can't find it, the OC values show on the bios but it isn't what its running at if that makes any sense, any help would be great
 
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
Click to expand...

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

img3536u.jpg


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
 
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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?
 
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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?
Click to expand...

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
 
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
 
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Im currently getting 2000MHz at auto volts on the RAM, looking to tune soon, any advice on a Z77X- UD5H (I will search, but working now ;) )
 
buzzlightweight said:
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
Click to expand...

did you know all your IBT tests NOT stable?
 
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