sodimm ddr2 1066 --DOES it even exist?

I have a centrino 2 processor in my notebook which has a FSB of 1066mhz...
my HP-dv5 has its memory clocked at 800mhz...

So i've been googling for the longest time for pc2-8500 or pc2-8600 (SODIMM) and have had no luck... EXCEPT for
http://www.tigerdirect.ca/applications/searchtools/item-details.asp?EdpNo=4417207&SRCCODE=SHOPSHOP&cm_mmc_o=2mHCjCmtB5fBbfCjCVqHCjCdwwp

so i guess my questions are, is that website correct, is that actually ddr2 memory? And are the other manufacturers making pc2-8500 or pc2-8600 for notebooks?

Any help is greatly apreciated.

 

I posted a similar thread, but your notebook only supports 800mhz, so any memory with higher clocks would just down-clock to 800mhz...

http://forum.notebookreview.com/showthread.php?t=385394

 

Bane i thought the limitation to memory speed was be the FSB frequency.
My cpu (P7350) has it listed has 1066mhz...so can i not match it with memory clocked at 1066mhz?

 

Some motherboards will have clockspeed limits on the RAM. My Gateway P-6860fx does this, the limit is 667mhz, even if I were to put in DDR2_800.

 

The RAM speed is independent of FSB. RAM directly talks to the northbridge chipset, not to the CPU.


CPU ==(1)== NorthBridge Chip ==(2)== RAM


In the latest PM45 chips, the speed of link (1) is 1066Mhz whereas the speed of link (2) is 800MHz. So whatever RAM you use that supports 800+ MHz, it will downclock to 800MHz.


--

 

does 1066mhz ram work with the santa rosa chipset?

 

It will downclock to DDr2 667 with the Santa Rosa (assuming you have a cpu with FSB of 667 or higher) and to DDR2 800 with the current PM/GM45 series chipsets which have a DDR2 800 limit for DDR2 memory(assuming your cpu FSB is capable of running at 800 or higher). Santa Rosa does not support DDR3 memory.

 

Actually it will downclock to 667MHz on a Santa Rosa notebook. Santa Rosa uses the 965 chipset, which supports up to 800MHz FSB/667MHz DDR2 memory.

 

Oh yeah, you are correct. SR supports only up to DDR2 667.

 

There is this:

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4417207&CatId=2500

But for apple. You can try to see if it works...

 

"Apple memory" is a marketing scheme. DDR2 memory is DDR2 memory.

 

ramgen, your post was very informative, i looked up some more things and ive read that the p45 chipset does not natively support ddr2 1066mhz but that the memory multiplier can be incremented or something to that effect. Is there such a method to support higher clocked memory?

 

I have never heard of it, neither does my laptop have it in its BIOS settings. That should be a hardware limit.

--

 

That PC8500 could be handy for people who overclock the CPU by raising the FSB. The limiting factor is usually the RAM, but if you put 1066 in 800Mhz slots I think you'd get more overhead.

I might have to try this...

 

So their is basically nothing i can do to make use
of the extra clock speed because of the chipset?
Does this mean people who overclock their memory are limited to this too?

 

tell us how it goes if you do

 

Well, I looked up the part number (KTA-MB1066K2/4G) for the Tigerdirect/Kingston RAM, and it's DDR3 after all. Just a little too good to be true I suppose.

Clutch is going to try some Kingston HyperX "performance" PC2-6400 in his G50VT and see if he can clock that any higher...

I've often run my RAM at ~980Mhz, so there is some room for overclocking the 800Mhz stuff.

 

So there is no ddr2 1066mhz ram?

I know there is at least PC2-7200, 900mhz.

 

Last I checked the 1066MHz FSB Intel processors only supported up to 800MHz memory. That being said, even if you could get 1066MHz RAM to work it isn't going to provide a noticeable performance boost. Quantity over speed wins when RAM is concerned.

 

Where did you see PC2-7200?

 

@kaltmond, I have never seen a PC2-7200 sodimm in a shop, but I was talking to someone on a forum who had that in his laptop.

I have just done a quick search for it on the net but it seems to be just as hard to find as 1066mhz ram.

 

Greg, i have already 4 gigs of mem. in my notebook which is far more than i need for my applications, rather the faster clocked memory is for games, like Crysis..Ive seen this fame use up to 1.2 gigs of memory in medium settings.

So if such as thing like ddr2 1066 doesn't exist, then is it possible for me to
overclock my memory. Or would the p45 chipset impede on that? And if that is the case maybe i can jus get better performance memory with lower latency/timings.

 

If you aren't overclocking, higher frequency and/or lower latency is a marketing gimmick since it yields zero net performance in real life applications.

 

@BigBird24, your chipset will not stop you from overclocking your FSB via "setfsb". If you need help with setfsb check the thread in my sig.

 

If you do find a way to do it without changing the FSB can you please post how you do it?

 

@moral_hazzard
I was incorrect in my previous post, overclocking memory is not nearly as simple as i thought it would be

My remaining confusion is
If i can adjust the memory clock via the fsb or divider then what exactly
about the chipset is stopping me from using faster clocked memory?

 

I believe the chipset locks the FSB:RAM ratio so you can't get it lower than 1.3325:1. Of course, if you overclock the FSB your RAM can run that much faster, but still at a ratio of 1.3325:1

 

Jacob youve clarified alot for me.
Also i called kingston and they verified that the so called DDR2-1066 Sodimm
is in fact DDR3....Sad...

Anywayz i think ive decided that i will probably increase the FSB (via setfsb)
and this based on the ratio of the northbridge will increase my RAM's frequency.

So ill probably need performance (brandname) DDR800 ram that can hit
effective frequencies of 900 or 1000mhz.

This overclocking stuff is very effective way of learning about hardware, ive leaned alot about the internals

 

I found that to be the case for me as well. Fortunately Asus-made computers usually allow for hands-on activities (unlike my old Compaq or Dell).

My stock RAM is pretty good actually--I've gotten it up to 1050Mhz, so you might try seeing what kind of speeds you can get from that before trying something better.

If you aren't familiar with using setfsb for overclocking the bus, send me a PM.

 

What is your stock ram?

 

I have 2x4gb of PC2-6400 Hynix (Hyundai) RAM, so it's supposed to run at 800mhz. There's a link in my sig which shows it running at 1042mhz. I'm pretty happy with a 30% overclock.

 

The processor and ram are at the mercy of the host chipset AND the manufacturer BIOS. Not the other way around.

 

Well, if your chipset and bios allow for overclocking the FSB (as for instance in the Asus G50), then you're limited the slowest hardware component dependent on the bus speed (cpu, ram, pci, etc.). In my case that's the RAM. Once I get much over 1000mhz my RAM begins to make occasional errors, and I get a BSOD at about 1080mhz.

 

Hah, RAM is by far the fastest hardware component. The chipset and CPU can't even use a fraction of the maximum throughput that RAM has. The slowest component would be HDD then probably GPU and CPU. In terms of OCing, it's generally the FSB that will limit things (though some laptops have fewer dividers which make RAM more important).

 

No the ram is limmiting things because when you OC the FSB the ram is overclocked and usually starts being unstable before the CPU. So having 1066mhz ram allows for a greater OC. When you put the 1066mhz ram in your laptop the ram will downclock to 667mhz (if you have the santa rosa chipset) or downclock to 800mhz if you have the newer chipset. then there is room to overclock the FSB since your ram will just be going back to its stock speed.

If you had 667mhz ram in there and you overclocked the fsb then very soon you will get a BSOD because the ram will not tollerate the OC.

Basically we need some DDR2 1066mhz sodimm sticks here.

 

Can you not increase the divider so that the slower clocked memory will be multiplied to reach the max FSB?

Too bad you can't change the voltage of notebook memory...

 

Actually you can change the voltage of the notebook memory, using spdtool or Thaiphoon burner. Although it may not be such a good idea.

But those tools also let you change the ram timmings so it will let you make the ram more stable.

I would still prefer some 1066mhz sticks.

 

Moral hazard, I'm with you on wanting 1066mhz sticks, but I wonder if it would work to flash 800mhz RAM, telling it its PC-5300 (667), so that when the FSB overclocks, the RAM won't go as high.
I might also have to try overvolting my RAM...it's not too expensive to replace should the worst happen.

 

This is what I had to do with my RAM which is PC2-6400. Changing the SPD to mimic PC2-5300 which in turn gets the BIOS and Northbridge to use a 4:5 ratio but because I have OC'd from 266MHz to 333MHz the RAM actually runs at ~415MHz clock or effective 830MHz.

 

sodimm ddr2 1066 --DOES it even exist?
no such thing doesn't exist !
plenty business web's placing bullsit on their websites to confuse buyers ...

 

ATM, binning DDR2 SO-DIMMs at 1066MHz isn't practical/feasible/cost economic, hence I doubt you will see any mainstream products. There is a very small chance that an enthusiast brand will release it but with DDR3 becoming more mainstream, I doubt companies will invest any more into DDR2. While DDR3 is currently no better than DDR2, it has more potential mainly due to it's higher clocks.

 

I just bought recently 2x4GB ddr2 800 6-6-6-18 samsung
i think ddr3 are more aimed for desktop rather than laptop ...

 

Nope, DDR3 is also in SO-DIMM format which is for notebooks. Your purchase of the 2x4GB DDR2-800 kit doesn't really seem relevant to the possibility of 1066MHz memory...

 

I just bought the same but myne is 5-5-5-15 and it overclocks to 860mhz with the same 5-5-5-15 timmings, not good enough for me. I'v still got my eye out for the 1066mhz stuff.

 

That's what I'm afraid of. From a manufacturer's perspective it wouldn't make a whole lot of sense to introduce this now. Most new gaming laptops use DDR3.

I joined this thread in the hopes that I had missed out on something that might already exist on the edge of the computing world somewhere. C'est la guerre.

 

how big difference of performance is between yours 555 15 and mine 666 18 ?

 

myne is 666 18 stock but since I have the santa rosa chipset it downclocks to 667mhz @ 555 15, but when I overclock I don't change the timming so it runs 800mhz with 555 15 timmings.

It doesn't make much of a difference going from 666 18 to 555 15, better to just overclock it.

 

My Nvidia motherboard lets me change the timings, my crucial ram will do near 1000mhz 6-6-6-18 but some corsair stuff I tried (800 5-5-5-18) refused to get to 880mhz even at 5-6-6-18 (I cant change CAS). It would do 800 at 5-4-4-12 though so if you had a low stock speed that wont change it would be good as a slower lower latency chip as its a perfectly valid way of operating.

 

Is using DDR3/1066 just a marketing ploy, as it has very little benefit over DDR2/800 , because the higher latency cancels out the bandwidth increase.

 

Uses less power and operates at a lower voltage however.