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Discussion Starter #1
Some of you guys are asking what is the best ram for sandy bridge... i'm going to test some to find out. However this is not a value/performance thread (as some of these cost some major money), it's purely what these can acheive in terms of performance while keeping voltages @ 1.65v (4 24/7 use). After wards i'll partition this thread and do some benching with 1.7v+
smile.gif
For my testing method i use super pi 32m which is a very good indicator of 24/7 stability

Testbed:
Asus Maximus IV Extreme
[email protected] stock (for now)

Real Vdimm (mV) on MIVE bios 1598:
1006204.jpg

I have vdimm in bios set to 1.65 exactly... i have full phase set for vdimm, ocp disabled. Seems to overshoot a tiny bit

Corsair Dominator TR3X6G1600C8D
ver: 2.1
8-8-8- [email protected] 1600MHz (1.65v)[/I][/B]
1006199.jpg
I haven't changed any of the sub timings.. only the main 5, so i'm not sure if it will make a difference.
7771600.png

To sum up:
1600 8-8-8 1.65v ok
1600 7-7-7 1.65v ok
1600 6-6-6 1.65v no boot
1600 6-7-6 1.65v no boot
1600 6-x-x 1.65v no boot.

here is the surprising and disappointing part (i tried all the sb dividers)
1866 7-7-7 1.65v no boot
1866 7-8-7 1.65v no boot
1866 7-x-x 1.65v no boot
1866 8-x-x 1.65v no boot
frown.gif

1866 9-x-x 1.65v no boot
frown.gif

1866 10-x-x 1.65v no boot WOW!

i tried 2133 just for fun.
- nothing boots no matter timing

Gskill pi F3-17600CL7D-4GBPIS
manufactured date: feb 2011
7-10-10 1T @ 2200MHz (1.65v)[/I][/B]
1006203.jpg

Super pi 32m test (1.65v)
2250MHz 7-10-7 1T (1.65v)
22507107165vpis32m.png

2133MHz 7-10-7 1.65v
pis21337107.png

6-8-6 1866 (looking like it's gonna be psc xey will try 6-7-6
1866686pis.png

super pi 1m (am lazy, will update if any of these are unstable) stable
6961866pis.png

2250MHz 7-10-7 1.65v stable
22507107165vpis.png

just got these 10 minutes ago and basically did nothing but switched to 2133 strap, changed tRP to 7 and tRAS to 27. Still testing and will update as i go.

Corsair Dominator GT CMT4GX3M2A2000C8
ver 7.1
8-9-8 1T @ 2000MHz (1.65v)[/I][/B]
1006217a.jpg

These are definitely PSC... doesn't like anything but tRCD+2
Super pi 32m (1.65v) [email protected]
*update: 6-10-10 doesn't work for 2133 1.65v
@ any frequency >2133 cas 7 becomes unstable @ 1.65v.

## no boot @ 2250MHz 7-9-7, 7-10-7, 7-10-10, 8-9-8, 8-10-8,

Currently testing stability @ 2250MHz 9-10-9 1.65v

Tested
2250MHz 9-10-9 1.65v
corsairdominator2250910.png

cannot lower timings past this for 2250 (1.65v)
2133 7-9-7 1.65v
corsairdominator2133797.png

2133 7-10-7 1.65v
corsairdominator2133710.png

1866 6-8-6 1.65v
corsairdominator1866686.png

still testing

CMG4GX3M2A2000C8 (hyper mgh-e)
[/B]
1006215s.jpg

super pi 32m (1.65v) bios 1850
7-7-7 1866MHz 1.65v
mghecorsaircmg777186616.png


super pi 1m (1.65v)
8-8-8 2133MHz 1.65v
mghecorsaircmg8882133.png


you might be able to deduce that i was unable to get 2133 and these hypers to play nice
frown.gif

it's pretty well documented that sb does not like hyper ic... only if you have top end boards such as the mive and ud7/5 can you actually run them 32m stable.

Most that can have to run 1.7-1.72v vdimm, and a higher vccio ~1.14-1.2 ... so in accordance with my current testing method with 1.65v and a measly 1.1v for vccio, i was unable to over 1866 divider.

However these are 32m stable at 1600 6-6-5 1T and 1866 7-7-7 1T which is pretty darn good.. they will also scale up from those dividers if you increase blck and still be 32m stable (will get ss of that soon..) weird.
Corsair Dominator GT CMT6GX3M3A2000C8
1006646e.jpg
super pi 32m 7-9-7-27 1T 94 @ 2133MHz ([email protected] 4.8ghz)
2133corsair797.png
Gskill Ripjaws F3-17000CL7D-4GBXHD
1006698kq.jpg
screen shots comming soon, but seems like takes more volts to get 6-10-6 stable high frequency than my gskill pi 2200cl7. 6-9-6 not possible on standard cooling

The order of the ram in which i think is best for 24/7 usage and benching
1.Gskill pi F3-17600CL7D-4GBPIS:

This particular 2x2gb kit from gskill scales very well with it's rated voltage of 1.65v. For those of you who hesitate to increase vdimm due to worries of damaging your cpu, and who also want to get into benching, these are perfect for you. I've actually kept them stable at 2250MHz cas7 with only 1.62. They yielded the best super pi time and latency with cpu at the stock 3.8ghz. Aesthetically speaking they aren't to shabby looking
wink.gif
They are currently very scarce and hard to find:( .


2.Corsair Dominator GT CMT4GX3M2A2000C8:

This particular 2x2gb kit from corsair scales good with it's rated voltage of 1.65v. It does not compare to what was once the absolute best of the best label/brand name in "dominator gt" in previous years they used elpida IC. Due to the fallout with the defective hyper mnh-e ic (a large batch started dying with no cause), the majority of the RAM companies moved to using different integrated circuits for their top end stuff. This kit is indicative of what can be now considered premium performance in today's stream of marketed 'overclocking' ram. By that, i mean these can be had without to much trouble by going onto your favorite e-tailer and clicking buy... no need to search high and low on multiple forums and hundreds of ebay listings to find one. 7-9-7 2133 was achievable with the rated voltage of 1.65v.

3.CMG4GX3M2A2000C8 (hyper mgh-e):

this one is tough... it is a hyper mgh-e based module, which is both it's greatest asset and liability. To explicate further, hyper ic was/is considered the best ic for overclocking ram. However on this current platform 1155, it has trouble with compatibility issues and thus cannot achieve it's standard/full potential. Within my parameters of using just the stock voltage, the best i could get was near it's rated frequency of 2000MHz and it's rated timing 8-8-8. I am not certain where the issue lies... whether that issue is primarily a bios problem, or an inherent compatibility issue with sb imc itself. If it was the former i suspect that gigabyte, asus, or one of the other board manufacturers would have revised a bios by now that ameliorated the issue. From this observation i conclude that it lies within the new generation cpu itself. In terms of it's scaling with standard voltage, i cannot say it is very good since it barely reaches it's rating.. however in regards to tight timings this is the best out of the batch tested in this review. I got 6-6-5 1600MHz stable which was not possible with the others without a voltage increase.

4.Corsair Dominator TR3X6G1600C8D

I bought this hoping that the ic used would be some sort of elpida.. bbse, bdbg, or maybe hyper. The revision indicated it was so according to a table posted by corsair reps. 2.x was suppose to indicate ic by elpida. However once i tested it, it did not behave like elpida at all as it could not overclock to even the nearset sb memory divider which was 1866, regardless of how loose i set the timing. The only thing i could do with it was to decrease timing to 7-7-7 @ 1600MHz with the rated voltage of 1.65v. This leads me to beleive that the ic used was not elpida or powerchip since powerchip would have been able to increase in frequency with looser timings, nor could it have decreased tRCD to +0 without increasing it's rated voltage. I had youngpro who is one of the well known memory gurus tell me that it was samsung ic.. so i suspect he was correct by looking at it's behavior. This does not scale at all with voltage. It was a big disappointment.

Ocn member submissions
CL3P20's gskill pi
Gskill F3-16000CL6D-4GBPIS
2000mhz, 6-9-6-24, 1.65v

BrlpdjdImm.png
[/QUOTE]
Tests coming soon

i have more ram that i will be testing in the near future, but testing ram is very time consuming... will update as i go
smile.gif
 

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i was just testing F3-12800CL7T-6GBPI..they will do 8-10-9-27-1T @2133 (i need it 1.75v 1M .. )
Can't wait to see how the PIS's will do and waiting for F3-17000CL7D-4GBXHD and F3-17000CL8D-4GBXMD whichever comes available first

good thread ,Thanks bad +1
 

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Discussion Starter #4
Quote:
Originally Posted by redhat_ownage;14949110
hypers wont doo well on sandy she likes to keep it loose for whatever reason
rolleyes.gif


x58 likes it tight
wink.gif
just updated the gskill... 6-8-6 1866 is 32m stable
smile.gif


i'll try the hypers on both sb and x58
 

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Quote:
Originally Posted by badatgames18;14949189
just updated the gskill... 6-8-6 1866 is 32m stable
smile.gif


i'll try the hypers on both sb and x58
I have the 4GBPI sticks (F3-12800CL6D-4GBPI). Rated for CAS 6-8-6-24-2T
biggrin.gif


Generally speaking for DDR2/3, anything up to 1.8v on the sticks will be fine. Anything higher will cause damage over time, regardless of cooling.
 

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Discussion Starter #6
just reached my blck wall with stock voltages (except vccio 1.1v)
105.5 nets me 2250MHz 7-10-7 1T 1.65v fully stable!
22507107165vpis32m.png

these are pretty good 24/7 dimms... since these are xmp rated for 2200MHz already... i am assuming they overclock alot higher... except sb is blck tied
frown.gif


my 980x needs better cooling and when i get it.. i will try for 2400MHz+
 

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Nice job mate, your making me fall in love with SB

thumb.gif
 

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Discussion Starter #9
Quote:
Originally Posted by Not A Good Idea;14951473
those pi's look great!
yep
smile.gif

best psc modules i've had... after i'm done testing the other two memory (with 24/7 voltages)... i'll show you guys what these babies can do with benching voltages... cough cough... 6-9-6 super pi 32m stable

stay tuned
smile.gif


EDIT: will be posting both dominator kits this afternoon... and will then do some real benching
smile.gif
 

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Discussion Starter #11
update... posted first result for corsair 8-9-8 2000

definitely psc... now lets see if they can beat or at least tie the gskill cas7 2200
 

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Discussion Starter #13
Quote:
Originally Posted by coolhandluke41;14959775
i talk to Alice from Gskill ..PIS are under "status pending" ..i hope they notify me before Christmas
frown.gif
are you watching for the 7-10-7 ones also?
i want those, but they're also oos...

anyways..
doing 6-8-6 32m right now on the 8-9-8 dominators... they seem to be good so far. I am going back to test the gskill afterwards to see if i can come up with any difference.

then on to hypers
smile.gif


EDIT: anyone have any recommendations for settings? maybe tRCD 11 and cas 6? (6-10-10 doesn't work on the 8-9-8 dominators)
 

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Quote:


Originally Posted by badatgames18
View Post

are you watching for the 7-10-7 ones also?
i want those, but they're also oos...

anyways..
doing 6-8-6 32m right now on the 8-9-8 dominators... they seem to be good so far. I am going back to test the gskill afterwards to see if i can come up with any difference.

then on to hypers


EDIT: anyone have any recommendations for settings? maybe tRCD 11 and cas 6? (6-10-10 doesn't work on the 8-9-8 dominators)

yep ...7-10-7
this is what i'm looking for ;
F3-17600CL7D-4GBXHD
F3-17000CL8D-4GBXMD
F3-17000CL7D-4GBXHD
F3-17600CL7D-4GBPIS
all of the above are pending
 

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Discussion Starter #15
Quote:


Originally Posted by coolhandluke41
View Post

yep ...7-10-7
this is what i'm looking for ;
F3-17600CL7D-4GBXHD
F3-17000CL8D-4GBXMD
F3-17000CL7D-4GBXHD
F3-17600CL7D-4GBPIS
all of the above are pending

the one i bolded are awesome.. i've seen tons of them running the same thing i was running with the pi version @ lower volts.

Those pi were weird... they didn't like tRCD 9... i gotta retest them again since i didn't change any of the timings except the main 5.

On the dominator 8-9-8 however i was able to get stability @ 7-9-7 2133 1.65v... i had to manually change rtl though, maybe the same on the pi and it might also work.




EDIT: found the difference between these and the gskill!
@ higher frequency... above 2133... these dominators are not stable @ cas 7
i could not boot with cas 7 over 2133...(1.65v) here is the best i got so far... not tested super pi 32m yet so don't know if it's stable

EDIT: done testing... it's stable
Attachment 229154

it seems the gskill are stable @ cas 7 with much higher frequency
 

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the best (available)set right now is this;
http://www.newegg.com/Product/Produc...82E16820231434
someone mention 2133 7-10-7-25 @ 1.6v (they are MD but i like the low voltage/price and might get this set instead )
P.S. can you lower tRAS on PIS ?
EDIT; 2250 @CL9 is nice ..when we will see you in top 5 (32M)?
 

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Discussion Starter #18
Quote:
Originally Posted by coolhandluke41;14960657
the best (available)set right now is this;
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231434
someone mention 2133 7-10-7-25 @ 1.6v (they are MD but i like the low voltage/price and might get this set instead )
P.S. can you lower tRAS on PIS ?
yep... to 22, after that it gets iffy...
done testing today since my room is getting really hot
frown.gif


i have crappy air cooling and it's on an open bench
100_6213.jpg


will test the hypers tomorrow/ and retest the gskill pi
 

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Nice job there mate, dam i wish i could find the time, today was so hot i still cant do any decient testing yet.

All you sticks have a BL of 8 But these might be a BL of 4
CMG4GX3M2A2000C8
BL = No info, i presume 4
8-8-8-22

Try tRAS 22, with 8-8-8-22 interested to see how they go
drunken.gif
 

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Discussion Starter #20
Quote:
Originally Posted by Tigerpaws;14966850
Nice job there mate, dam i wish i could find the time, today was so hot i still cant do any decient testing yet.

All you sticks have a BL of 8 But these might be a BL of 4
CMG4GX3M2A2000C8
BL = No info, i presume 4
8-8-8-22

Try tRAS 22, with 8-8-8-22 interested to see how they go
drunken.gif
testing it now... i switched to bios 1850 though, i heard 1409 and 1850 were best for blck change and memory.

i'll post when i'm done... i'm hoping for 7-7-7 2133 super pi 32m stable (in my dreams
smile.gif
)
 
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