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Tightening 4GB G.Skill CL7 ECO's

post #1 of 8
Thread Starter 
Just stabilized (24 hrs Prime95) my system with a new 1090T. (sig rig listed)
4013Mhz 1.4v
NB 3010MHz 1.37v
HT 2006MHz
4GB G.Skill ECO's 1672MHz 7-8-7-24-40-1T 1.55v (stock 1.35)

Now attempting to tighten ram a bit and currently have it running at 6-8-6-24-40-1T @1.55v. It would not boot into windows at 6-7-6-24-40-1T @1.55v.
1st. Is there much more I can do to improve timings with a CHIV Formula?

2nd. I've read 1.6-1.65 max Dram Voltage on these, do you agree?

3rd. Is it necessary to go through another 24 hrs of prime to ensure stability after these changes of 7-8-7 to 6-8-6?
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post #2 of 8
Looks good to me! ECOs have either PSC (6-8-6 capable) or Elpida BBSE (6-7-6 capable) ICs; I believe the majority are PSC. G.Skill ECOs usually scale well with voltage up to around 1.58V. You could try 1.6-1.65V, though it may not do anything for stability.
You probably don't need another 24 hours of prime, but do run SuperPi Mod V1.5 (or better yet HyperPi which is multithreaded SuperPi) at the 32M setting, some runs of memtest86+ (to make sure you didn't push anything too far and caused permanent defects), and other tests such as HCIMemtest.
post #3 of 8
Thread Starter 
After reading your reply i ran superpi on 32m and while I'm not sure what the results should actually read as, I did notice some irregular entries on the times, also had a thin black line appear running across the monitor which I take is a sign.

Currently running memtest 86. When I first started memtest86 I saw there is a choice of 3 different versions to run. First try I chose #1, it restarted my pc right away. I than increased dram voltage to 1.58v. Failed again right away. Increased to 1.6v and chose #3 this time and is at 33% right now. Question I now have is which item (#1,#2,#3) should I be running in memtest86? (item #3 is version 3.4 I think)

I'll be running the test you mentioned but can you tell me what to look for in superpi, as to if it passes ok or it has trouble?

Jumped on the G/F's machine to post this and kill a little time waiting for memtest86 to run.
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post #4 of 8
Seems like a pretty good sign of something unstable. Looks like 1.6V may have done it for you. I don't think memtest86 uses items, I'm not entirely sure what you mean.
SuperPi will stop the test and warn you if something is completely unstable though - or the computer will freeze.
post #5 of 8
Thread Starter 
I know I didn't run memtest86 long enough (only 1 pass, 0 errors) and than ran superpi again with no more thin black line across the monitor. Here's the results from superpi and Everest. I'll get the other versions/programs you mentioned and run those tonight also. These were run at 1.6v in bios.

I'm still confused with superpi, it made it through just fine but how do I tell what these results mean? Good, bad, average?

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post #6 of 8
memtest86+ is not really for testing overclocked stability anyways; there are times when OS tests & stability say differently. I usually do run memtest after a round of memory overclocking to make sure I didn't wreck anything and the memory runs stable with added heat for around 2-3 hours.
post #7 of 8
Thread Starter 
UPDATE

After tighten to 6-8-6 and a little testing I decided to go out on a limb and copy xd 1771's settings. WOW! Took a while and with a slight increase in CPU/NB (1.369v to 1.389v) and than Vcore (1.409v to 1.416v) to finally pass another 12 hrs of prime. Because of these voltage increases I felt it necessary to check for stability again, might have been a waist of time for some but that's how I roll.

The first attachment shows memory benchmarks for current ram settings with NB Freq 3010MHz.
Second one shows same settings with NB raised to3260MHz.
In your opinion is it worth raising the NB Freq for the added gains shown? Or am I just chasing numbers here? In other words is this increase anything I might see or feel?

+Rep for xd 1771 for all your input, thanks man!!!

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post #8 of 8
Epic NB speed = 11.2+ GB/s with the ECOs. Now that's what I'm talking about Definitely keep that NB speed up there. 0.02V really shouldn't add anything to the temps, especially with your CPU voltage is really low and really good, and you've got a Mugen II which is a great cooler, all stuck together in an NZXT M59 which is a great case

I gotta work on upping my NB speed someday. I'm just hoping it doesn't lead to motherboard/boot errors like the last time.
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