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Samsung 2x4Gb Low Voltage DDR3 1600 kit (OCing to 2400+) Discussion - Page 143

post #1421 of 2025
Quote:
Originally Posted by shremi View Post

Ok nooob here on overclocking RAM ....
I just recieved today my sticks .... went into the bios and changed the timings to 1866 9-9-9-24 with 1.35v nothing else
I am running prime blend with about 90 to 95 % memory for an hour
1.- is this a good way to check for stabiity ???? Or should i try memtest ???? i really dont have a USB right now and my PC does not have a Optical drive
2.- How long do i need to let it prime so i can consider my memory stable ???
3.- Any other timings and voltage i might consider if this run is stable ????
Thanks
Shremi
Prime 95, Hyperpi and wPrime are all good for inital stability tests. Once you've passed those and think you've reached your final, stable settings, I strongly suggest you test with a program that can run at boot like memtest86 or HCI memtest (cd version, not free). You can never use all RAM when you're still running windows, and I've had a system that passed 24 hours Prime95 custom blend, 30 max size passes of IBT, and lots of Hyperpi 32M and wPrime 1024M runs return errors before reaching even 3% coverage in HCI boot test.
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post #1422 of 2025
Quote:
Originally Posted by Vonnis View Post

Prime 95, Hyperpi and wPrime are all good for inital stability tests. Once you've passed those and think you've reached your final, stable settings, I strongly suggest you test with a program that can run at boot like memtest86 or HCI memtest (cd version, not free). You can never use all RAM when you're still running windows, and I've had a system that passed 24 hours Prime95 custom blend, 30 max size passes of IBT, and lots of Hyperpi 32M and wPrime 1024M runs return errors before reaching even 3% coverage in HCI boot test.
Quote:
Originally Posted by ivanlabrie View Post

First run Wprime 32 for ram stability, superpi 32m is good too but takes longer.
Same can be said about 90% ram Prime 95 blend.

Ok guys thanks so far i have done 7 hours of prime i think i am going to stop now.... and get a boot usb so i can run memtest .

So if i achieved 1866 9-9-9-24 1T/N with 1.35 volts how far can i push this babies ???? I know i have a hell of a chip since it can do 5.0 stable with low volts

Thanks again + REP
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post #1423 of 2025
You should aim for 2400 or 2600mhz cl10 or cl11.
But that will need some tertiary timings tweaking and more vdimm, around 1.65v or 1.7v.
Perhaps you may need to set vccio/vtt to 1.2v and vccsa/imc to 1.15v though...
post #1424 of 2025
Does the amount of RAM per stick (and total) affect bandwidth and latency? Trying to interpret my results.

Samsung RAM (8GB) at 2000MHz 9-10-10-28-1T:



16 GB (2 x 8GB) of new G.Skill Ripjaws X RAM at the same settings (the sub-timings might be different, of course, I did not look at all of them - they have been left at auto), but this RAM generally lagged behind the Samsung RAM at similar or same settings:


Edited by ElevenEleven - 11/24/12 at 3:08pm
   
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post #1425 of 2025

Quantity of RAM/density of sticks - typically affects some of the main timings like tRFC and tRAS.. though what it will affect most is the tertiary timings [from the third timing set]

post #1426 of 2025
Yippee! Finally got past 2200MHz!



On a side note, after running Prime 95 over night it errored around the 9 hour mark. I upped VCCSA a little more and going to retest.
post #1427 of 2025
stable at 2133 10-10-10-28 1T thumb.gif
     
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post #1428 of 2025
Is anyone aware of a reason why my second desktop is having trouble accepting 4 good sticks of this memory? (4 x 4GB sticks). It's been doing great with 2, and when I tried adding 2 more from my main computer, I ran into all sorts of instabilities, even running the sticks at complete stock settings (1600MHz 11-11-11-31 and 1.5V). The components are listed in rig "No. 2" in my signature. I had to go back to the two original sticks while I figure this issue out.
   
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post #1429 of 2025
or not, at 1866, 9-9-9-24 1T 1.6V ehh
     
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post #1430 of 2025
Quote:
Originally Posted by ElevenEleven View Post

Is anyone aware of a reason why my second desktop is having trouble accepting 4 good sticks of this memory? (4 x 4GB sticks). It's been doing great with 2, and when I tried adding 2 more from my main computer, I ran into all sorts of instabilities, even running the sticks at complete stock settings (1600MHz 11-11-11-31 and 1.5V). The components are listed in rig "No. 2" in my signature. I had to go back to the two original sticks while I figure this issue out.


Most chips can't handle 4 sticks the same that they can 2. Bump the VTT voltage just a bit until it's stable. If that doesn't work (Stay below 1.2) then most likely the memory sticks won't work with each other.

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