What is the best memory for SB?

[SteveRo]

A year ago January (Jan10) I bot what I thought was very good memory -

3x2GB Corsair Dominator GT 2Kc7 - CMG6GX3M3A2000C7 -

http://img19.imageshack.us/img19/2204/domgt.png (http://img19.imageshack.us/i/domgt.png/)

I can run 2140 to 2150 at 7-7-6-20-58-1T on SB but CANNOT do 2200 7-9-7 nor 7-10-7 at qpi/vtt=1.2v and dramv=1.88v.

What am I doing wrong?
Anything else I should try?
Do I need new memory? :shrug:
Any help is greatly appreciated!

[Alex-Ro]

Well you could try CAS8 :)

[SteveRo]

^ Alex, sure but I want cas 7!

[Alex-Ro]

Well you could try each stick separate to identify the best two.remember that you need good memory to be able to achieve that.If none of the sticks make cas7 then it's probably IMC/mobo related and you should try another cpu or mobo :)

[Hondacity]

.If none of the sticks make cas7 then it's probably IMC/mobo related and you should try another cpu or mobo :)

where did you get this information?

[Alex-Ro]

Confidential from Intel ;)

[Hondacity]

how many cpus have you tried?

[chew*]

Thats hogwash, tested 10 cpu's or around there.......unless they are bclk challenged they can clock ram fine.

It's the boards that can or can not.

Steve, you need to play the same game you played with your cpu's. Want good ram you have to bin.......ufortunately thats not gona happen with hypers anymore.

They needed to be stocked up on quite a while ago........however your killing yourself over nothing.

PSC is fast as well when tuned right, cheaper, requires less volts, not as painfull when they die, less stress on IMC.......And hyper is slow when tuned wrong.

Tighter is not always faster....


http://chew.ln2cooling.com/qdig-files/converted-images/The_Laboratory/med_ram%20addiction%202.jpg

[BeepBeep2]

Thats hogwash, tested 10 cpu's or around there.......unless they are bclk challenged they can clock ram fine.

It's the boards that can or can not.

Steve, you need to play the same game you played with your cpu's. Want good ram you have to bin.......ufortunately thats not gona happen with hypers anymore.

They needed to be stocked up on quite a while ago........however your killing yourself over nothing.

PSC is fast as well when tuned right, cheaper, requires less volts, not as painfull when they die, less stress on IMC.......And hyper is slow when tuned wrong.

Tighter is not always faster....


http://chew.ln2cooling.com/qdig-files/converted-images/The_Laboratory/med_ram%20addiction%202.jpg

I'm sure you can bin good sticks out of the ADATA kits, I hear they have moved to MGH-E now but it's almost like you'd have to buy $1000+ of them to get anywhere.


I can run 2140 to 2150 at 7-7-6-20-58-1T on SB but CANNOT do 2200 7-9-7 nor 7-10-7 at qpi/vtt=1.2v and dramv=1.88v.

What am I doing wrong?
Anything else I should try?
Do I need new memory? :shrug:
Any help is greatly appreciated!
Gonna break this down a bit


I can run 2140 to 2150 at 7-7-6-20-58-1T
Those speeds are really good.


but CANNOT do 2200 7-9-7 nor 7-10-7 at qpi/vtt=1.2v and dramv=1.88v
You will need to move to 8-8-8, or if you insist on keeping tight timings at that speed go 8-8-7

http://img180.imageshack.us/img180/1507/17voltresult.jpg

tRCD will be the timing holding back frequency, for example I could lax to 6-7-6 in the image above and gain a few mhz....however, thats just it, a few Mhz.

Laxing to 7-7-6 would get me even more mhz, then 7-7-7 maybe a tiny bit more, though not many. tRAS has less effect on frequency than CL, and CL has less effect than tRCD...but tRCD's effect is not huge with Elpida Hyper chips like it is with PSC and other IC's.

7-9-7 will not go further than 7-8-7, if that makes sense.

[ScottALot]

Chew*, I can has memory? :D

[chew*]

Chew*, I can has memory? :D

Tbh i never sell it, one thing i never sell, it comes in very handy when working on board compatibility. That tray is full, tray 2 is almost full.

[Don_Dan]

Tbh i never sell it, one thing i never sell, it comes in very handy when working on board compatibility. That tray is full, tray 2 is almost full.

Great minds think alike... :rofl:

[SteveRo]

Thats hogwash, tested 10 cpu's or around there.......unless they are bclk challenged they can clock ram fine.

It's the boards that can or can not.

Steve, you need to play the same game you played with your cpu's. Want good ram you have to bin.......ufortunately thats not gona happen with hypers anymore.

They needed to be stocked up on quite a while ago........however your killing yourself over nothing.

PSC is fast as well when tuned right, cheaper, requires less volts, not as painfull when they die, less stress on IMC.......And hyper is slow when tuned wrong.

Tighter is not always faster....


http://chew.ln2cooling.com/qdig-files/converted-images/The_Laboratory/med_ram%20addiction%202.jpg

Much Thanks Mr. Chew!
What PSC memory would you recommend for fastest performance.
I would like spend no more than $500 - 2x2GB or 2x1Gb if faster?

[chew*]

Much Thanks Mr. Chew!
What PSC memory would you recommend for fastest performance.
I would like spend no more than $500 - 2x2GB or 2x1Gb if faster?

I would suggest, a couple tripple channel kits for core i7 1366 platforms 2000 6-9-6 rated so you can bin, alternatively the flares tuned for AMD rated 7-9-7 2000 are doing very well, 2 sets would gurantee things better.

Last you can try the 7-10-7 ripjax X people seem to like however I can not comment having not used them. I see people doing 6-9-6 2133+. Not sure if all sets of the same quality however.

I know the 8-9-8 2133 gskills can do 7-9-7 but 6-9-6 2133 is a pipe dream for that model.

Lets see what else, Corsair GTX3 are doing well. Everything else is a grab bag atm.

avoid 1x1gig, 2x2 is faster in 3d, 1x1g was helpfull with weak imc's like clarky.

[SteveRo]

^ if I can find a couple - how about these? - (from c website) -

Dominator® GT — 1GB DDR3 Memory (CMGTX6)
Dominator® GT is the ultimate performance memory solution ....

SPD Latency: 9-9-9-24
Tested Latency: 9-11-10-30
Memory Type: DDR3
Speed Rating: PC3-21000 (2625MHz)
Tested Speed: 2625Mhz

edit - just saw your last post, disregard the above as it is only 1Gb

[SteveRo]

Mr. Chew, sir - what memory did you use - here -

http://www.xtremesystems.org/forums/showpost.php?p=4746931&postcount=428

and here -

http://www.xtremesystems.org/forums/showpost.php?p=4740063&postcount=332

You seem to be getting very nice results!

[SteveRo]

how many cpus have you tried?

Mr. Honda was this to me?

I have sampled seven 2600k's so far. :rolleyes:

Multi results - booting into windows xp32 -
52x, 53, 55 (died), 52, 56, 55, 52. :D

This was all at ud5 default bclock, HT off, mem at 1866, cpuv up to 1.61v.
My remaining 56 and 55 might go higher with higher cpuv but I'm a little shy given that I killed one good one already (too much time at cpuv 1.66v?). :rolleyes:

[Don_Dan]

Steve, check out the G.Skill RipjawsX 2133 CL7 or 2200 CL7 kits, those should be the highest binned PSC on the market right now, and they should treat you well.
You'll need less Vdimm than your Hypers need now and most of these kits should do 6-9-6 at high speeds as well.

[SteveRo]

Steve, check out the G.Skill RipjawsX 2133 CL7 or 2200 CL7 kits, those should be the highest binned PSC on the market right now, and they should treat you well.
You'll need less Vdimm than your Hypers need now and most of these kits should do 6-9-6 at high speeds as well.

Newegg has the gskill pi 2x2GB 2400 cas8 for $269.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231420

Also the ripjaws 2x2GB 2200 c7 for $149.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231454

Which of these do you like better
Do I need to pick up a couple sets and do some binning?

[Alex-Ro]

Well specs for that 2400 8-11-8 at 1.65V are awesome,i would think that those are better binned than 7-10-7 at 2133...But again it is the board that makes a good impacct also,for example with asrock p67 extreme6 hypers wont be stable at all no matter voltage or timings at 2133,same kit runs just fine on biostar allowing 2133 7-7-7.Also,with the 7-10-10 kit i could manage to boot with xmp profile or manual setting for 7-10-10 only with 1.7 voltage,and on the biostar same kit allows for 7-10-7 completely stable at 1.6V.

I i were you and have some money to spend on the memory i would buy 5 sets of this kit(which uses the same chips as the 2133 7-10-7 model)

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231449

Binn the best 2 sticks then return the rest to the shop ;)


However i am curious is someone tested the 2400 8-11-8 kit,specs are awesome :D

[SteveRo]

Well specs for that 2400 8-11-8 at 1.65V are awesome,i would think that those are better binned than 7-10-7 at 2133...But again it is the board that makes a good impacct also,for example with asrock p67 extreme6 hypers wont be stable at all no matter voltage or timings at 2133,same kit runs just fine on biostar allowing 2133 7-7-7.Also,with the 7-10-10 kit i could manage to boot with xmp profile or manual setting for 7-10-10 only with 1.7 voltage,and on the biostar same kit allows for 7-10-7 completely stable at 1.6V.

I i were you and have some money to spend on the memory i would buy 5 sets of this kit(which uses the same chips as the 2133 7-10-7 model)

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231449

Binn the best 2 sticks then return the rest to the shop ;)


However i am curious is someone tested the 2400 8-11-8 kit,specs are awesome :D


If gskill has already binned and pulled out the higher performing chips for the 2400 product - wouldn't binning the 2133 C9 be duplicating gskill's effort - just to see if they made a mistake?
If I am going to bin, wouldn't it be better to buy 2 sets of the 2400 C8 and find the best 2 of 4 sticks?

[Linuxfan]

Hey Steve,
For your DomGT 2000C7 kit I'd try 8-8-8-24 72 1T for 2200mhz and tighten from there.
Did you find the best two stick out of your set of three already for this platform?

[Don_Dan]

Newegg has the gskill pi 2x2GB 2400 cas8 for $269.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231420

Also the ripjaws 2x2GB 2200 c7 for $149.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231454

Which of these do you like better
Do I need to pick up a couple sets and do some binning?

Actually I think the 2200 C7 are the higher bin, 2400 C8 is harder for the IMC, but for 2200 C7 you need better ICs imho. If you calculate true CAS for both kits, you get ~6.36ns for 2200 C7 and ~6.66ns for 2400 C8. Of course this is only a rough estimate, but since the RipjawsX are designed for SB and a lot cheaper than the PI I would go for them.


If gskill has already binned and pulled out the higher performing chips for the 2400 product - wouldn't binning the 2133 C9 be duplicating gskill's effort - just to see if they made a mistake?
If I am going to bin, wouldn't it be better to buy 2 sets of the 2400 C8 and find the best 2 of 4 sticks?

Exactly...
Alex, do you think these chips will miraculously get better if you test enough of them? I don't think so! ;)
G.Skill has already binned the best ICs for higher-end products, what you get in the lower specced products are only ICs that were not good enough for a higher bin. G.Skill is known for binning their stuff tightly.
I have tested many high-end and lower-end D9, and although they use the same chips, there are huge differences between them. The same is still true for these PSC kits.

Steve, just get a set of the Ripjaws X 2200 C7 first and try if those can help you achieve the settings you're hoping for, no need to buy many sets yet.

[SteveRo]

Hey Steve,
For your DomGT 2000C7 kit I'd try 8-8-8-24 72 1T for 2200mhz and tighten from there.
Did you find the best two stick out of your set of three already for this platform?

Very good point - I haven't tested my 3rd stick yet - I should do that before I start buying all new stuff! :rolleyes:

[SteveRo]

What is the best testing approach for three sticks to find the best two.
Test each one by itself or 1 with 2, 1 with 3 and 2 with 3?
Also what is the best test -sp32m? :shrug:

[Hondacity]

Mr. Honda was this to me?

I have sampled seven 2600k's so far. :rolleyes:

Multi results - booting into windows xp32 -
52x, 53, 55 (died), 52, 56, 55, 52. :D

This was all at ud5 default bclock, HT off, mem at 1866, cpuv up to 1.61v.
My remaining 56 and 55 might go higher with higher cpuv but I'm a little shy given that I killed one good one already (too much time at cpuv 1.66v?). :rolleyes:

that was for the misinformation....or as chew called it "hogwash" information

[Linuxfan]

What is the best testing approach for three sticks to find the best two.
Test each one by itself or 1 with 2, 1 with 3 and 2 with 3?
Also what is the best test -sp32m? :shrug:
Thats what I'd do and actually will be doing with three DomGT 1GB 2000C7 sticks this week. :D
Test each stick individually starting at a known stable speed and see which ones can pass Superpi. You can test 32M or even less depending on the stability you want to see with each chip. 32M is tougher on the chips than to 3D and other 2D stuff.

[Alex-Ro]

Actually I think the 2200 C7 are the higher bin, 2400 C8 is harder for the IMC, but for 2200 C7 you need better ICs imho. If you calculate true CAS for both kits, you get ~6.36ns for 2200 C7 and ~6.66ns for 2400 C8. Of course this is only a rough estimate, but since the RipjawsX are designed for SB and a lot cheaper than the PI I would go for them.



Exactly...
Alex, do you think these chips will miraculously get better if you test enough of them? I don't think so! ;)
G.Skill has already binned the best ICs for higher-end products, what you get in the lower specced products are only ICs that were not good enough for a higher bin. G.Skill is known for binning their stuff tightly.
I have tested many high-end and lower-end D9, and although they use the same chips, there are huge differences between them. The same is still true for these PSC kits.

Steve, just get a set of the Ripjaws X 2200 C7 first and try if those can help you achieve the settings you're hoping for, no need to buy many sets yet.


Well you have a good point here,BUT.I had the 2200 C7 kit for SB,one friend had 2133 9-11-9 KIT for SB.It performed EXACTLY the same,scaled till 1.72V,did exactly the same main timings.So the two sets performed exactly the same.I don't know which one is being a better statement,that he got a very good kit or that i had an average 2200C7 kit,but neither of ones could do 6-9-6 32M.Too bad that i have one 2GB stick of some Exceleram that will do that,but the G.Skills were a no go.That's why i'm saying to go and bin yourself,and if you find a very good 2 sticks of 2133C9,they are fking cheap,so you actually save 200$ which you can use to buy something else,or get yourself a fine evening with a fine lady....Just saying :rolleyes:

[Linuxfan]

Another thing Steve,
Have you tried less voltage on your kit? For example 1.80v and less? Does it affect clocks and if so how much?

[SteveRo]

^ I must confess - I've really neglected my memory :(
I figured out that as a tripple on x58 this set liked high v.
I just used my x58 dramv on the SB.
Big assumption when going from tripple to double that it needed so much but I knew I didn't want to go higher (already at 1.88v).
Might I be able to get higher performance at lower dramv?

[SteveRo]

Actually I think the 2200 C7 are the higher bin, 2400 C8 is harder for the IMC, but for 2200 C7 you need better ICs imho. If you calculate true CAS for both kits, you get ~6.36ns for 2200 C7 and ~6.66ns for 2400 C8. Of course this is only a rough estimate, but since the RipjawsX are designed for SB and a lot cheaper than the PI I would go for them.



Exactly...
Alex, do you think these chips will miraculously get better if you test enough of them? I don't think so! ;)
G.Skill has already binned the best ICs for higher-end products, what you get in the lower specced products are only ICs that were not good enough for a higher bin. G.Skill is known for binning their stuff tightly.
I have tested many high-end and lower-end D9, and although they use the same chips, there are huge differences between them. The same is still true for these PSC kits.

Steve, just get a set of the Ripjaws X 2200 C7 first and try if those can help you achieve the settings you're hoping for, no need to buy many sets yet.

What about getting two sets of the Ripjaws X 2200 C7 - for current SB - use best 2 sticks, if I am lucky and all four are good - keep all four for quad memory - what is the latest name? - maybe SB-E or LGA2011? -

http://semiaccurate.com/2011/01/09/first-lga-2011-consumer-board-details-appear/


"Although the next picture might not look that different, if you look carefully you can make out some additional details here and more specifically the fact that the board has two DIMMs on each side of the CPU socket. The LGA-2011 platform is said to have quad channel memory support, so let's hope Intel has managed to take advantage of all the extra bandwidth on offer, but if the current LGA-1155 processors are anything to go by, it seems like Intel has managed to improve its memory bandwidth with Sandy Bridge."

[Linuxfan]

What about getting two sets of the Ripjaws X 2200 C7 - for current SB - use best 2 sticks, if I am lucky and all four are good - keep all four for quad memory - what is the latest name? - maybe SB-E or LGA2011? -

http://semiaccurate.com/2011/01/09/first-lga-2011-consumer-board-details-appear/


"Although the next picture might not look that different, if you look carefully you can make out some additional details here and more specifically the fact that the board has two DIMMs on each side of the CPU socket. The LGA-2011 platform is said to have quad channel memory support, so let's hope Intel has managed to take advantage of all the extra bandwidth on offer, but if the current LGA-1155 processors are anything to go by, it seems like Intel has managed to improve its memory bandwidth with Sandy Bridge."
By that time there may be better kits out but you could do that anyway to find the best chips.
I'm just thinking that your kit may not need 1.88v since i have never heard of a 1.65v rated hyper kit scaling on air that high. :shrug:

[chew*]

Mr. Chew, sir - what memory did you use - here -

http://www.xtremesystems.org/forums/showpost.php?p=4746931&postcount=428

and here -

http://www.xtremesystems.org/forums/showpost.php?p=4740063&postcount=332

You seem to be getting very nice results!

First is hypers binned from 40 sticks.

Second is the gskill Flare I reccomended.

Both had quite a bit of time put in.

Basically unlike Alex's findings. I tested a crap load of ram first, once i found known good sets to work 1100+ at reasonable timings I started testing multiple cpu's.

One was a fail for memory clocks, oddly enough it was also blck challenged and could barely do 100 bclk regardless of multiplier. C7 hyper and or C6 with 2133 PSC was a non issue, higher was.....

11? I lost count were fine for 2200+, none of those were bclk challenged although some varied from 105-108 bclk.

To do accurate IMC analysis you must first start off with known good ram :)

Also when running higher or agressive ram speeds I found high vcore just makes things unstable.

Msimax's chip we ran 32m at only 1.48v........

Mine we ran around 1.536v

[l0ud_sil3nc3]

I know the 8-9-8 2133 gskills can do 7-9-7 but 6-9-6 2133 is a pipe dream for that model.



I thought that the 8-9-8 2133 were a higher bin than the 7-10-7 2133 kit:shrug:

[Don_Dan]

I thought that the 8-9-8 2133 were a higher bin than the 7-10-7 2133 kit:shrug:

These kits use different chips anyway, so comparing bins is not that easy.

[l0ud_sil3nc3]

These kits use different chips anyway, so comparing bins is not that easy.



really I assumed they were both psc ic's under there just different bins, but I guess not.

I know my set can run 2200 7-9-7-24 with 1.68v, but there is no way 6-9-6 is happening with these:shrug:

[Don_Dan]

The first kits were BBSE ( the 8-9-8 one ), it's possible they changed chips to PSC by now. Your kit sounds like PSC indeed, can you check it?
No need to pull the heatspreader, just tell me, what do the chip look like? If they have sharp edges, it's PSC.

And what can your kit do at 800MHz?

[l0ud_sil3nc3]

The first kits were BBSE ( the 8-9-8 one ), it's possible they changed chips to PSC by now. Your kit sounds like PSC indeed, can you check it?
No need to pull the heatspreader, just tell me, what do the chip look like? If they have sharp edges, it's PSC.

And what can your kit do at 800MHz?

I will check when I get back to the house:up:

[l0ud_sil3nc3]

the ic's most definitely have sharp edges, no rounding whatsoever

[Don_Dan]

Yeah, sounds like PSC then.

[Eldonko]

PSC is cheap and works well on SB. You can get a good kit for barely over $100 that will do 2200 @ 7-9-7. Tough to find that 2200 kit of 7-7-6 hyper on SB. I would look for a proven kit from someone if that is what you need.

[Morphling]

Thats hogwash, tested 10 cpu's or around there.......unless they are bclk challenged they can clock ram fine.

It's the boards that can or can not.

Steve, you need to play the same game you played with your cpu's. Want good ram you have to bin.......ufortunately thats not gona happen with hypers anymore.

They needed to be stocked up on quite a while ago........however your killing yourself over nothing.

PSC is fast as well when tuned right, cheaper, requires less volts, not as painfull when they die, less stress on IMC.......And hyper is slow when tuned wrong.

Tighter is not always faster....


http://chew.ln2cooling.com/qdig-files/converted-images/The_Laboratory/med_ram%20addiction%202.jpg

WTF! Does all those Dominators are Hypers? :shocked: