sammy green, x79 & big problems

pgi947

pgi947

pgi947

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I'm struggling to get to grips with my 16gb sammy greens using an msi xpower II and a 3820.

Basically I can't get them to post above 1866mhz, which is fine for 24/7 but it's holding my benching back, would like to wrench as much as possible out of them.

Using the base and strap, 2000mhz won't post even with slack timings, same applies to 2133mhz on 100 base and 1.0 strap.

Loosened up to 11-11-11-32-2t 134trfc.

System agent is 1.2v, vtt is 1.05v, pll is 1.7v and dram voltage is 1.605v.

Any pointers as to where I'm going wrong??
 
Got my Gskills 2133MHz running at 2400MHz last night. Have you tried running the ram at 1.65v and also raising the imc volts. Ram tunings somthing i've not really looked into much.
 
I'll try 1.65 & 1.7v tonight, imc is called system agent on this board, it's also set at 1.2v.

Had no bother getting 2400mhz c11 on my last kit of kingston with this board and chip.
 
I've got a set of the Samsung stuff here which I run with my 2600k set up at 2133Mhz at 1.55v

Never tried for any higher. I set the Imc voltage to 1.25v on mine last night for 2400MHz. 8 packs ya man for all this Ram tuning business.
 
Not sure if my RIVE settings will be any good but I've got mine at:

2133-9-10-10-21-1T-96 or 2400-10-11-11-25-2T-96

Using Dram voltage of 1.55v, VTTCPU 1.15v, VCCSA 1.15v, PLL 1.9v

Pretty much used 8 Packs settings from the X79 Overclocking guide

From the various threads on samsungs they like sloped timings like 9-10-10 or 10-11-11 rather than flat and some don't like low trfc's
 
Cheers I'll try that tonight with sloped timings as I've only tried flat so far.

Just wanted to check if I was missing something or doing something dumb before pestering the big fella :)

While I remember, dram vref voltage relevant? Its auto set to 0.75v.
 
16gb you might need upto 1.65v dram,system agent should be fine on stock 0.9v, cpu vtt can be anywhere from stock 1.05v to 1.2v,but around 1.08-1.1v might be enough

8gb you could do 2133mhz with 1.55v but 16gb will need more voltage
 
wazza300 said:
16gb you might need upto 1.65v dram,system agent should be fine on stock 0.9v, cpu vtt can be anywhere from stock 1.05v to 1.2v,but around 1.08-1.1v might be enough

8gb you could do 2133mhz with 1.55v but 16gb will need more voltage
Click to expand...

This. I needed a 0.15v increase for 2000mhz when I went from 8GB to 16GB
 
Thanks :)

So to try tonight; 1.65v+, increase vtt, slope timings.

As for system agent, my msi overclocking booklet thing suggests this is directly linked to IMC and should be at 1.1-1.2v under 'normal' conditions and as high as 1.6v for 'extreme' conditions?
 
Had a quick try out before I head off to bed, still nothing :(

Base: 100
CPU MP: 43
Strap: 1.0
CPU Vcore: 1.4v
Mem MP: 21.33
Timings: Linked; 10-11-11-32-2T 114 trfc
Dram Voltage: 1.65
PLL Overvoltage: Enabled; set to 1.8v
CPU I/O (VTT): 1.2v
SA: 1.2v

Hang on post (code 62) sometimes see the bios splash, sometimes not, either way requires a cmos reset to continue :confused:

Edit: What happened to the HUGE Samsung thread?
 
You might be right on vccsa not sure on x79,if you adjusting the bclk you might need more and more vccio

It could also be a BIOS issue as in not supporting Sam green fully? Idk but gigabyte have improved there BIOS over the last few months to run it at higher speeds,Idk where msi are atm
 
wazza300 said:
You might be right on vccsa not sure on x79,if you adjusting the bclk you might need more and more vccio

It could also be a BIOS issue as in not supporting Sam green fully? Idk but gigabyte have improved there BIOS over the last few months to run it at higher speeds,Idk where msi are atm
Click to expand...

It almost looks like MSI have given up on any new Bios, last release was 1.5 (what I'm on) in October, this bios has a few annoying quirks, like PLL voltage only starting at 1.8v and lack of decimal on the bclk.

I'm trying to avoid using the base and strap just now until I can nail down settings I know work for the memory.
 
It should work with those timings and voltages,esp with cas 12,I'm not an expert on all the secondary timings but even on auto it should run fine
 
a lot here are pointing you trouble shooting for Samsung on Z77. You are correct SA is IMC on X79. Post up all the settings available to you and I will look. Post code 62 is sticking in memory training.
 
Loosing a few hundred points benching by staying at 1600mhz :)

I'll stick some screens up tomorrow evening 8 pack, I must be missing something simple, blew my game plan of start high and slack then work back right out the window :p
 
Right here we go!

absolute stock as I just had to reset the CMOS, note I did miss the timing options, but it does from what I can see, give option to adjust all timings, I left all seconds and thirds as auto:

bios1.jpg

bios2.jpg

bios3.jpg

bios4.jpg

bios5.jpg

bios6.jpg


Anything I've missed? The last screen is new to me (ECO/power settings) as it was hiding in the ECO tab, which I tend to ignore.

I was using:
CPU Core = 1.4v
SA: 1.2v
I/O (VTT): 1.2v
PLL: 1.8v
DDR: 1.65v
Memory: 21.33x @ 10-11-11-32-2T, fail to post with #62
 
Last edited:
Have you tried memory fast boot disabled?
And if its possible have you tried overclocking a single stick at a time and running memtest, this will determine if you have a poor clocking one as your oc on them will only be as good as the worst.
When your 2nd/3rd on auto does it show the timmings being used to the left, if so post em. I had to increase one of my 3rds for stabillity.
 
Yeah, memory fast boot disabled actually made things worse, it went from hanging on os boot to not even showing the bios splash.

I'll change the timings to linked tonight and show what everything is defaulting to.
 
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