Need memory for an old Gigabyte X38 mobo. Looking to OC.

[Rob94hawk]

Currently running an old Gigabyte GA-X38T-DQ6 with only 2 GB of Corsair DDR3 1800 7-7-7-20 on Vista 64.

The Corsair memory is awesome but I haven't been able to find another 2 GB and obviously 2 GB isn't enough for Vista, so I'll sell it. I'm sure someone will want DDR3 1800 @ 7-7-7-20.

Since this X38 mobo is about 5+ years old and DDR3 is now dirt cheap, fast and run at lower voltages I figure I could run 8 GB @ 1600 without an issue. Any chance going higher than 1800? 2133?

Or if anyone wants to sell me another 2 GB of CORSAIR 2GB DDR3 1800 TWIN3X20481800C7DFIN....

[Don_Dan]

8GB is very tough on these old boards and might not even be compatible at all. Your chances of going higher than DDR3-1600 are also very slim.
It's a lot easier to run 2x2GB on S775. If you don't need the extra 4GB it might be an option for you.

I saw you have 2x4GB DDR3-1600 CL9 kit coming from Newegg, you can try to get it to work on your board but don't get your hopes up!

[Rob94hawk]

http://www.intel.com/Assets/PDF/datasheet/317610.pdf

From page 33:

The MCH supports PCI Express* upper pre-fetchable base/limit registers. This allows
the PCI Express unit to claim IO accesses above 36 bit, complying with the PCI Express
Specification. Addressing of greater than 8 GB is allowed on either the DMI Interface or
PCI Express interface. The MCH supports a maximum of 8 GB of DRAM. No DRAM
memory will be accessible above 8 GB.

People are doing it so I'm optimistic.

I was running CORSAIR 2GB (2 x 1GB) @ 1800 7-7-7-20 way back but it started acting up. Then I realized I never installed the fans that came with it. lol So I just throttled it down to 1333 and just left it like that till today.

Trying to find a good overclocking cpu to replace the E6750 and get some more life out of this system.

Edit: reading that people are running 16 GB.

[Don_Dan]

Don't forget about page 20:

Using 1 Gb device technologies, the largest memory capacity possible is 8 GB,
assuming Dual Channel Mode with four
x8 double sided un-buffered non-ECC or
ECC DIMM memory configurations.
Note:
The ability to support greater than the largest memory capacity is subject to
availability of higher density memory devices.

Using 1Gb ICs you'd need four 2GB sticks, 2Gb ICs might or might not work. In most cases they should work though overclocking headroom is reduced.

Theory is great but since you already own the memory anyway you can just try it.

[xdan]

Rob94hawk, search for Crucial LP 1600CL 8-8-8-8-24 1.35v.
http://www.newegg.com/Product/Produc...82E16820148656
A friend of mine uses 2*4GB on a P45 motheboard ant there are completly stable at 1600CL 7-7-7-21 1.5 or 1.55v if i'm not mistake.
See here , he can even do Super 32M 1600CL 6-7-7 and 1800+ CL 8-9-9.
http://hwbot.org/submission/2371609_...in_31sec_953ms

Just remember only LP 1600CL8 1.35v, there are also standard Tactical or Tactical Tracers 1600CL8 1.5V - full height modules, they are different chips, might not works so good.

It's an old plaftorm on socket 1155 these LP memory can do 1866 8-8-8-24 1.5v Memtest stable, 2000 CL 8-8-8-24 1.6v.
On 775, it seems that the NB chipset it's hard to handle 8GB 1800+ low latencys.

[Rob94hawk]

Rob94hawk, search for Crucial LP 1600CL 8-8-8-8-24 1.35v.
http://www.newegg.com/Product/Produc...82E16820148656
A friend of mine uses 2*4GB on a P45 motheboard ant there are completly stable at 1600CL 7-7-7-21 1.5 or 1.55v if i'm not mistake.
See here , he can even do Super 32M 1600CL 6-7-7 and 1800+ CL 8-9-9.
http://hwbot.org/submission/2371609_...in_31sec_953ms

Just remember only LP 1600CL8 1.35v, there are also standard Tactical or Tactical Tracers 1600CL8 1.5V - full height modules, they are different chips, might not works so good.

It's an old plaftorm on socket 1155 these LP memory can do 1866 8-8-8-24 1.5v Memtest stable, 2000 CL 8-8-8-24 1.6v.
On 775, it seems that the NB chipset it's hard to handle 8GB 1800+ low latencys.

Thanks for the tip. IIRC I think I had to crank up the voltage to 2.0 to get the Corsair to run 7-7-7-20 so would it be safe to say that all the latest DDR3 that run @ 1.5 volts would be ok? Either way we'll find out soon.

[xdan]

They are ok up to 1.63-1.65v.

[Rob94hawk]

WOOT! 8 GB of Corsair Vengance is running rock solid at 1333 7-7-7-20.

Was going to go for 2133 but there's one problem, I forgot how to overclock!

Thought I would remember everything when I went into the BIOS but drew a total blank! This is gonna take a while. It's been 6 years since I last did it...

PS: What's the latest program that stresses out the memory? I probably have it on here but all the tests and benchmarks are from 2008.

[Rob94hawk]

This Beta Fg BIOS is allowing me to crank everything up! Even the memory to 2144 mhz! So far I'm @ 1800 10-10-10-30 2T (450fsb)

Gonna run Prime95.

[Rob94hawk]

Prime95 stable. Max CPU temp 51C. I guess I could add more volts here and there.