asus p5wd2 premium +2x512 mb xms2

[nmamag]

I own a asus p5wd2 premium +2x512 mb xms2 5400 c4 ddr2 667 mhz

 

In the mobo's bios when all is set to auto the memory is shown as a 4300 -533 mhz - memory.

 

when i set manually in the bios the memory to 667 mhz the system is crashing-restarting randomly.

 

I presume that there is a lack of memory voltage.

 

Which is the suggested memory voltage ?

 

My best regards from Greece

 

Nikos

[RAM GUY]

Please follow the link in my signature for the tested settings we use and set the timings manually like we do when we test them.

[nmamag]

means that i will set memories from 667 Mhz to 533 Mhz if i understood correct

 

 

Testing parameters for Twinx/XMS2-5400C4:

 

TWIN2X1024-5400C4 Data Sheet

 

Each pair is tested and packaged together using the following settings:

CPU External Frequency: Manually set to 250MHz

DDR2 SDRAM Clock: Manually set to 533MHz

DRAM Timing Selectable: Auto Yields the following timings

SDRAM CAS Latency: 4T

SDRAM RAS to CAS Delay (tRCD): 4T

SDRAM Row Precharge (tRP): 4T

SDRAM Active to Precharge Delay (tRAS): 12T

DDR2 SDRAM Voltage: 1.9

NB Voltage 1.9 Volts (On Abit AA8 Only)

All other settings are motherboard defaults.

Maximum DDR2 recommended VDIMM: 2.1 Volts

[CandyKid]

Hrm... wierd.

 

The latencies look right, might be a typo on the frequency, but you can use up to 2.1 volts on the VDimm for DDR-II. I'd try 1.9 volts and see if Memtest86+ pops up errors.

 

If not, then stay at the lower voltage... if it does, try increasing it by 0.1 and test again.

 

PLUR

CK

[RAM GUY]

Yes exactly! Please set the memory Freq at 533 MHz and try over clocking your CPU.

[CandyKid]

Oh, I get it.

 

A 200MHz FSB with a 3:2 divider yields a 133MHz memory frequency times four for DDR-II equals DDR-II 533 / PC4300!

 

Now, if you OC your FSB to 250... a 3:2 divider yields a 166MHz memory frequency times for equals DDR-II 667 / PC5400!

 

So, by saying they set it to 533, what they really mean is they're setting the memory divider, then increasing it by overclocking the CPU's FSB (thus increasing the memory's frequency).

 

PLUR

CK

[RAM GUY]

LOL! CK sometimes I think I need to Visit you more often! But it will have to wait till the rain and Snow and sleet stop, maybe next decade.