[kazama]

Hi, im getting problems with two kits of those memorys.

I use the four banks on the board, each of 2gb (F3-12800cl7d-4gbxm) on a p8p67 pro rev 3.0 with the latest bios 1606.

XMP dont seem to work detect 7-8-7-24-3N 1.5v

It setup memory to ddr-1600, timming to the detected xmp values and voltage to 1.5

With the four modules, putting those timmings and memory detection to auto (with the detected value dont boot) it boots, but the REAL timmings are 9-9-9-24 2T im still using 1.5v

Using only 2 banks, timming works fine.I checked the four modules and seems ok, 2 on 2 boot perfect, using 4 imposible boot.

What happened if i use 4 modules it becomes to CL9? what are the correct voltage them? are 4 modules of CL7 incompatibles?

 

[pioneerisloud]

It could be a BIOS issue. I know BIOS 1850 really sucked hard for me (I never tried 1606 as it was another Beta BIOS). You could try upgrading to 1704 (works flawlessly for me), or downgrading to 1305 (also works flawlessly).

Have you checked that BOTH of your kits work correctly at the right timings? One kit at a time on this one. It's possible that you have a bad stick or a bad kit of memory.

If the above all fails, you can try increasing your VCCIO voltage up to 1.10v. That tends to help with IMC problems, and then forcing your timings manually.

 

[kazama]

i checked both kits, both work fine with correct timmings, until i put both kits, is impossible boot with those timmings.

Also i tried vccio to 1.10 and manual timmings, no luck, dont boot.

Looks like 2 kits of those mem cant stick together.

Same happens with the anterior bios, the one that comes with the mobo, not sure the ver, maybe 1250 or something similar, where is the bios 1704, 1606 was the latest i see on asus.

Anyway ripjaws x 8gb cl8, work fine with my mobo at correct timmings? if i cant find a solution i will try to change to a pair.

 

[eternal7trance]

Quote:

Originally Posted by kazama;14244386
i checked both kits, both work fine with correct timmings, until i put both kits, is impossible boot with those timmings.

Also i tried vccio to 1.10 and manual timmings, no luck, dont boot.

Looks like 2 kits of those mem cant stick together.

Same happens with the anterior bios, the one that comes with the mobo, not sure the ver, maybe 1250 or something similar, where is the bios 1704, 1606 was the latest i see on asus.

Anyway ripjaws x 8gb cl8, work fine with my mobo at correct timmings? if i cant find a solution i will try to change to a pair.

What happens if you just put the timings in manually. XMP profile doesn't always work right.

 

[badatgames18]

you could just manually change the timings yourself?

 

[Phantom_Dave]

You do realize that when you add 4 dimms vs. 2 dimms the stock timings rated for a single pack of dual channel memory increases? The stock timings stated on a pack of dual channel is only guaranteed for 2 dimms.

If you want guaranteed stock timings with 4 dimms you need to buy a quad channel pack.

 

[pioneerisloud]

Quote:

Originally Posted by kazama;14244386
i checked both kits, both work fine with correct timmings, until i put both kits, is impossible boot with those timmings.

Also i tried vccio to 1.10 and manual timmings, no luck, dont boot.

Looks like 2 kits of those mem cant stick together.

Same happens with the anterior bios, the one that comes with the mobo, not sure the ver, maybe 1250 or something similar, where is the bios 1704, 1606 was the latest i see on asus.

Anyway ripjaws x 8gb cl8, work fine with my mobo at correct timmings? if i cant find a solution i will try to change to a pair.

Odd. Definitely sounds like an IMC limitation. I find it weird though, because I'm running 4x2GB right now of 9-9-9-24 sticks, and they work flawlessly up to DDR3-2250 for me.

A single kit of Ripjaw X 8GB CL8 would work fine, yes. But its honestly not going to be enough of a performance increase to warrant the cost, if your current RAM is stable at 9-9-9 just fine.

I can let you know how well the kit you're looking at buying works though, here in about a week. I just ordered 16GB of that same exact RAM myself (2x4GB Ripjaw X DDR3-1600, CL8, 1.50v).

 

[badatgames18]

Quote:

Originally Posted by kazama;14244386
i checked both kits, both work fine with correct timmings, until i put both kits, is impossible boot with those timmings.

Also i tried vccio to 1.10 and manual timmings, no luck, dont boot.

Looks like 2 kits of those mem cant stick together.

Same happens with the anterior bios, the one that comes with the mobo, not sure the ver, maybe 1250 or something similar, where is the bios 1704, 1606 was the latest i see on asus.

Anyway ripjaws x 8gb cl8, work fine with my mobo at correct timmings? if i cant find a solution i will try to change to a pair.

yep..
pioneerisloud sounds right...

you can try increasing vccio to 1.16 and increasing your vdram to 1.66-.65v (which is perfectly safe for 24/7 use)
populating more of the memory slots is more work for the IMC...so it probably needs more voltage.

EDIT: BTW if you can give me a list of all of your ram timings i might be able to figure out a way for you to get it to boot without changing volts. (might need to increase tRFC and TRC)

 

[pioneerisloud]

I personally have just used Auto timings for all my timings, except the 5 main ones. Never had an issue with an Asus board and auto sub timings personally. So I'm not 110% sure that setting TREF and TRC and all that manually will help a whole lot.

 

[kazama]

all the memories are the same 7 8 7 24 1.5v
,
which are the correct volts for run all the memories 9 9 9 28 ( bios detect like that)?

im on 2600k doing oc to 4.5, all auto, except vcore manually to 1.33, vdrm 350.I passed ibt, superpi 32m, and linx using 4096 but using all the memory system reset.

if i cant run it 24/7 at 787 timmings at least i want run totally stables with 999 and my oc.

is better for the oc 2 modules of 4 instead of use 4 modules?

 

[badatgames18]

Quote:

Originally Posted by pioneerisloud;14244605
I personally have just used Auto timings for all my timings, except the 5 main ones. Never had an issue with an Asus board and auto sub timings personally. So I'm not 110% sure that setting TREF and TRC and all that manually will help a whole lot.

really? i couldn't get my oc stable without changing the auto timings... btw tRFC is huge in performance increase in some areas.

Looks at this, it's really interesting... tons of benches
http://www.xtremesystems.org/forums/showthread.php?263183-Memory-Timing-Benchmark-(CL-tRCD-tRP-tRAS-CR-tRC-tRFC-tREF)

EDIT: TRC is also one of the biggest timings for stability... it has to be tRAS+tRP or higher (or else it won't boot), i personally add 4, so (tRAS+tRP+4)= tRC

EDIT: when you leave it on auto, the mobo (atleast mine) will not adjust the other timings accordingly. Even if it does... making a slight change could be the difference between booting and not booting. OP do you know how to get to your advance timings?

 

[pioneerisloud]

Quote:

Originally Posted by kazama;14244678
all the memories are the same 7 8 7 24 1.5v
,
which are the correct volts for run all the memories 9 9 9 28 ( bios detect like that)?

im on 2600k doing oc to 4.5, all auto, except vcore manually to 1.33, vdrm 350.I passed ibt, and linx using 4096 but using all the memory system reset.

if i cant run it 24/7 at 787 timmings at least i want run totally stables with 999 and my oc.

is better for the oc 2 modules of 4 instead of use 4 modules?

So if you force it to use all the memory, it won't pass stable? Sounds like you've got a bad kit in there then to me. At least one stick sounds faulty. And that would certainly explain why it doesn't play nicely.

 

[Dust]

Felt kinda fishy myself when I first bought it, some random brand comes out of nowhere and produces a seemingly perfect kit @ a low price.

I use the ram & it's impossible to meet those stock voltages & timings. It's only possible to be put at the claimed "1600MHz, 7-8-24-T2, 1.5v" if I use just ONE stick.

However I disregarded the issue & overclocked the ram instead, now at 1866MHz, 8-8-9-24-T2, 1.65v with 4 sticks.

*Happens on all versions of BIOS. The ram simply isn't a "genuine" cas7.

 

[Phantom_Dave]

As I already said, you will almost always have to purchase a pack of quad channel memory in order for it to run at the specified timings/volts. What the OP described is exactly what usually happens if you try to use 2x packs of dual channel memory. The timings will increase at the specified voltage.

For example, this pack of dual channel G Skill runs at 6CL for dual channel but at 9CL for 4 dimms. (Check the reviews)

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231444
Quote:

Pros: bought a second kit of this memory. When running with 4 x 2gb sticks you will need to tweak your settings. Right now Im running 4 x 2gb @ 2133MHz 8-10-8-28 2n VDRAM 1.62 V. High quality memory, I recommend.

Cons: CAS 6 with 4 dimms is probably not going to happen, but G.Skill only guarantees these work with 2 dimms, fyi.

But here is a quad channel kit which I bought that guarantees the timings/volts for 4 dimms:

http://www.gskill.com/products.php?index=348&c1=&c2=&search=UmlwSmF3cw==

Note: these are only the guaranteed timings/volts. Naturally you can modify the timings/volts manually. But you may not be able to get it as fast as you expected from 2 dimms.

 

[pioneerisloud]

Quote:

Originally Posted by Phantom_Dave;14244711
As I already said, you will almost always have to purchase a pack of quad channel memory in order for it to run at the specified timings/volts. What the OP described is exactly what usually happens if you try to use 2x packs of dual channel memory. The timings will increase at the specified voltage.

For example, this pack of dual channel G Skill runs at 6CL for dual channel but at 9CL for 4 dimms. (Check the reviews)

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231444

But here is a quad channel kit which I bought that guarantees the timings/volts for 4 dimms:

http://www.gskill.com/products.php?index=348&c1=&c2=&search=UmlwSmF3cw==

Note: these are only the guaranteed timings/volts. Naturally you can modify the timings/volts manually. But you may not be able to get it as fast as you expected from 2 dimms.

Mine is 2 dual packs, and it works just fine. My last rig ran the same (Kingston Hyper X DDR2). And my rig before that was also 2 dual packs. I've NEVER bought a quad pack, simply because 2 dual packs is cheaper.

Not saying you're wrong, but I've NEVER experienced this problem, unless the memory itself was faulty.

If he's indeed, failing stress tests then its either a vcore issue or bad RAM. He said that it fails when running full system memory, which leads me to believe its a bad stick or two of RAM in there.

 

[Phantom_Dave]

Quote:

Originally Posted by pioneerisloud;14244725
Mine is 2 dual packs, and it works just fine. My last rig ran the same (Kingston Hyper X DDR2). And my rig before that was also 2 dual packs. I've NEVER bought a quad pack, simply because 2 dual packs is cheaper.

Not saying you're wrong, but I've NEVER experienced this problem, unless the memory itself was faulty.

If he's indeed, failing stress tests then its either a vcore issue or bad RAM. He said that it fails when running full system memory, which leads me to believe its a bad stick or two of RAM in there.

It's not always the case that the timings will change when using 2x dual channel. But often they will. I don't know why, I only know it does. Maybe higher quality (more expensive) ram is less likely to have issues with 4 dimms? IDK. But what the OP describes is what I've read in many reviews (namely from G Skill).

 

[pioneerisloud]

Quote:

Originally Posted by Phantom_Dave;14244748
It's not always the case that the timings will change when using 2x dual channel. But often they will. I don't know why, I only know it does. Maybe higher quality (more expensive) ram is less likely to have issues with 4 dimms? IDK. But what the OP describes is what I've read in many reviews (namely from G Skill).

Hmmm......

Here's what I've ran in 2 dual packs
4x1GB of Corsair XMS DDR400, 2.5-3-3-6 (ran stable at DDR580, 2.5-3-3-6-2T)
4x2GB Kingston HyperX DDR2-800, 5-5-5-18 (ran stable at DDR2-1100, 5-5-5-15-2T)
4x2GB GSkill Ripjaw X DDR3-1600, 9-9-9-24 (runs stable at DDR3-2133, 9-11-9-28-2T, and my sig speeds).

You could be onto something though. I can test it once my 16GB of Ripjaw X CL8 DDR3-1600 comes in next week. This would especially make sense, since this is my first set of GSkill RAM, and my first set of DDR3, and it just happens to be the budget junk RAM.

 

[Phantom_Dave]

Quote:

Originally Posted by pioneerisloud;14244835
Hmmm......

Here's what I've ran in 2 dual packs
4x1GB of Corsair XMS DDR400, 2.5-3-3-6 (ran stable at DDR580, 2.5-3-3-6-2T)
4x2GB Kingston HyperX DDR2-800, 5-5-5-18 (ran stable at DDR2-1100, 5-5-5-15-2T)
4x2GB GSkill Ripjaw X DDR3-1600, 9-9-9-24 (runs stable at DDR3-2133, 9-11-9-28-2T, and my sig speeds).

You could be onto something though. I can test it once my 16GB of Ripjaw X CL8 DDR3-1600 comes in next week. This would especially make sense, since this is my first set of GSkill RAM, and my first set of DDR3, and it just happens to be the budget junk RAM.

I don't doubt that you have ran what you have said. I do know that the only difference between between dual, tri, and quad channel memory is that the manufacturer grouped up ram that they tested and confirmed to run at the timings/volts they state on the package for the enclosed dimms.

It could be possible that you happened to get the exact same ram that would have been grouped into a quad pack and the OP got ram that would not have been grouped into a quad pack. There is no difference in the ram since the mobo determines dual, tri, and quad channel, not the ram (you probably already knew this).

Other than that, IDK. I only know what I've read in G Skill reviews. I was looking for G Skill exclusively so I haven't read reviews on other brands of ram lately. In any case, I feel this is information which should be shared.

 

[pioneerisloud]

I just think its an interesting find honestly. Not saying you're wrong either.

I do intend to test this theory out once my 16GB comes in though.

 

[kazama]

Seems then that using two kits memories becomes CL9?

I will try at home 9-9-9-24-2
dram voltage 1.6
vccio 1.10

I will do the linx (all memory) test again.

If crashed again maybe i have to up more the vcore? actually is at 1.33 in bios, rest fo values in auto.

Will be the vcore be less if i change the memories for a kit 4gbx2? i begin to think that more dimms more vcore needed.