Low Latency DDR3 1600

Anyone thinking about trying this stuff?
Newegg.com - Kingston HyperX 4GB (2 x 2GB) 204-Pin DDR3 SO-DIMM DDR3 1600 (PC3 12800) Laptop Memory Model KHX1600C7S3K2/4GX

Cas7 @ PC12800

And cheap too!

http://www.valueram.com/datasheets/KHX1600C7S3K2_4GX.pdf

Kingston says in the product PDF that the SPD is JEDEC standard 9Cas @ 1333mhz, but I can't see why it wouldn't perform closer to 6 CAS or even 5 Cas at a lower frequency.

 

It will only perform at the JEDEC specs based on the frequency.

 

Check out this Thread all about that kingston hyperx ram http://forum.notebookreview.com/ali...it-2-intel-xmp-7-7-7-20-1-5v.html#post6173045

And this one http://forum.notebookreview.com/ali...rmance-increase-upgrade-4gb-ddr3-8gbddr3.html

And this one http://forum.notebookreview.com/alienware/473435-m17x-r2-ram-upgrade.html

 

Kingston really needs to stop selling XMP based sodimms.

 

hum can we overclock the memoru speed on the m17 with Z's .29 bios if so i might have some very bad idea with these and a qx9300

 

That is the only system I know that can take advantage of XMP memory but still requires a hack (zfactors bios). You would also need Intel's XTU program to change the timings. Many people complained of instability when doing this on the M17.

 

then it's no problem

Zfactor's bios problem was just a matter of finding the right CPU voltage and killing the XTU process and services once done

my m17 has been runing oc for ever since

so 'll be seeing how far i can push this system with these ^^

 

Use this awesome toold for overclocking the M17x-R2! E-LEET v1.07.0 eleet.zip

 

He was talking about his M17.

 

yup

now comes the other bad idea isn't there a 8gb kit? cause i might not be able to afort a qx9300 soon so it would be an investment and i would adrealy have my 8gb

 

Not that I've seen. Just 1066 through 1600 4GB 2x2 kits.

 

No, Kingston currently does not make a 8GB kit

in my R1 I was able to adjust memory timings through the nvidia control panel. Never really messed with it to see if it just locked up the system however the option was there. If it were possible, then I can't see why it wouldn't provide significant advantages. 6-7CAS vs 9 is a big improvement.

 

let's hope they will soon

so it looks like i'll be going for the qx first

 

You could not change the CL, just the other timings.

 

I acutally came across these too on newegg, they're the same spreaders Kingston uses, and they're cheap too.
Newegg.com - Sunbeamtech Copper Notebook Memory Heat Spreader Cooling Model NMHS-C RAM Heatsinks only

can't say it's not a repost, but at least it's semi-relevant.

lame... however, it's better than nothing I suppose.

 

I had those heat spreader before. I turned them into copper shims.

 

The eleet tuning utility can be used on the M17x or the M17x-R2 I believe.

 

It could only be used on the i-Core processors and corresponding chipsets (pm55, p55, ...).

 

I honestly bought them because they'll look flashy more than their heat spreading capabilities. haha

 

I have exactly the same model and mine run at the following speeds:

in the BIOS
when @ 1333MHz cas 7
when @ 1066MHz cas 6

 

it would be interesting to compare synthetic bandwidth benchmarks to CAS9 ram if you have the time.