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Samsung 2x4Gb Low Voltage DDR3 1600 kit (OCing to 2400+) Discussion - Page 54

post #531 of 2062
Frys $37 now. I dont have a lot of extra time so I cant see why the PN might be different from others in this posting.

2 x 4 gb, 30nm, low profile.

http://www.frys.com/product/6798175?site=sa:adpages%20page:Tues_P29
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post #532 of 2062
Quote:
Originally Posted by Gabe63 View Post

Frys $37 now. I dont have a lot of extra time so I cant see why the PN might be different from others in this posting.
2 x 4 gb, 30nm, low profile.
http://www.frys.com/product/6798175?site=sa:adpages%20page:Tues_P29



That's laptop memory.
    
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post #533 of 2062
Quote:
Originally Posted by Gamingnub View Post

That's laptop memory.

^This

SO-DIMMs are laptop only. Pretty decent RAM for a laptop though it may be hard finding a laptop that can overclock memory. tongue.gif
    
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post #534 of 2062
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post #535 of 2062
Quote:
Originally Posted by nawon72 View Post

It's cheap, OC's with ease, and fits under any heat sink. It evens allows you to fit a 140mm fan in the front of a D14 without having the fan ridiculously high up. thumbsupsmiley.png

BTW, TPU review:
http://www.techpowerup.com/reviews/Samsung/MV-3V4G3/

9.8 drool.gif

Quote:
Voltage Scaling:

The 30 nm memory ICs are manufactured by Samsung, commonly referred to as "D-die" and have two voltage modes, 1.35 V, and 1.5 V. The two different voltage modes and supporting DIMMs do use the same memory IC, so attempting to use the higher voltage setting on 1.35 V sticks maybe provides some success when overclocking, but seemingly the low-profile PCB prefers 1.35 V, and the "regular" PCB prefers 1.5 V. Both types can be purchased currently at very low prices.

The 1.35 V and 1.5 V settings each have pre-specified limits, with 1.35 V supporting 1.28 V - 1.475 V, while the 1.5 V mode supports 1.45 V - 1.575 V. I have found that the 1.35 V mode does operate at lower voltages as well, but going lower than 1.25 V can cause artifacting on the desktop with certain VGAs, even though stability testing passes with flying colors.

That said, I was able to run the default 11-11-11-28-1T timings @ 1600 MHz with just 1.2 V, which is considerably lower than the stock 1.35 V.

I also found that adjusting voltage outside of the pre-programmed voltage mode results in frequency scaling dropping off quite quickly as explained above, so I recommend that users do not exceed the pre-determined voltage ranges in order to prolong the DIMM's life. That means that 1.35V sticks should see no more than 1.475 V, and 1.5 V sticks should see no more than 1.575 V. Both types of DIMMs do seem to scale a little bit once those values have been exceeded, but because the gains are quite minimal, it is not recommended at this time.

Also really interesting points made by the author about sub timings, maybe those are the ones preventing 16GB systems from hitting 2133 stable atm. Need to try playing around with them!
Edited by Velathawen - 3/14/12 at 8:38pm
post #536 of 2062
Quote:
Originally Posted by Velathawen View Post
Also really interesting points made by the author about sub timings, maybe those are the ones preventing 16GB systems from hitting 2133 stable atm. Need to try playing around with them!

You mean these timings?

Only timings mentioned IIRC (Click to show)

he two crucial timings, of course, are CAS Latency, and Write CAS Latency.

For CAS 6 and 7, tWCL should be CAS -1 (so CAS 6 gets tWCL 5 and CAS 7 gets tWCL 6)

For CAS 8 and 9, tWCL should be CAS -2 (so CAS 8 gets tWCL 6 and CAS 9 gets tWCL 7)

For CAS 10 and 11, tWCL should be CAS -3 (so CAS 10 gets tWCL 7, and CAS 11 gets tWCL 8)

They didn't help me get 2133 stable using CAS 11, and Auto tWCL for me was already correct for 2133. I still need 1.55V-1.575V, but I may have a weak IMC since more VCCIO (1.15-1.75 makes a difference) seems to help with stability. I also find it strange that i seem to require the nearly same amount of DRAM volts for 11-11-11-28 2T 8tWCL as 10-10-10-28 2T 7tWCL

 

However, the recommended settings of 1866 9-9-9-27 1T 7tWCL 1.35V worked perfectly.


Edited by nawon72 - 3/14/12 at 8:52pm
post #537 of 2062
just picked up a set from fry's
this is what works so far...
1600 7-8-7-22 128 1T 1.6v
1866 8-8-8-24 128 1T 1.6v
post #538 of 2062
What makes these better than.... lets say a Ripjaw kit?

I got 2x4gb 1066 Rip jaws for $20 shipped on the egg....
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post #539 of 2062
Quote:
Originally Posted by xFALL3Nx View Post

What makes these better than.... lets say a Ripjaw kit?
I got 2x4gb 1066 Rip jaws for $20 shipped on the egg....

there faster stock and use less voltage stock, and they overclock likea bauss!!!!
post #540 of 2062
Quote:
Originally Posted by xFALL3Nx View Post

What makes these better than.... lets say a Ripjaw kit?
I got 2x4gb 1066 Rip jaws for $20 shipped on the egg....

1066 vs 1600?
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