Corsair TWIN2X1024-5400C4PRO and Corsair TWIN2X1024-4300C3PRO

[ch3style]

Hi,

 

I'm French and i don't speak very well english.

 

I have a problem with my Asus P5B-Deluxe and my corsairs, when i use my Corsair TWIN2X1024-5400C4PRO (http://www.corsairmemory.com/corsair/products/specs/twin2x1024-5400c4pro.pdf) alone my computer boot but if i add my Corsair TWIN2X1024-4300C3PRO (http://www.corsairmemory.com/corsair/products/specs/TWIN2X1024-4300C3PRO.pdf) the computer don't boot.

 

I have the lastest version of BIOS, if you can help me please thanks

[DerekT]

I don't think that you will be able to use these four sticks.

 

I would test by inserting the two 4300's in Dimm 1 and Dimm 3. Enter the BIOS and set your DRAM to 533Mhz. Set your timngs to 5 - 5 - 5 - 15 and test for boot.

 

Then install the two 5400's in Dimm 2 and Dimm 4. Test for boot.

[ch3style]

I don't think that you will be able to use these four sticks.

 

I would test by inserting the two 4300's in Dimm 1 and Dimm 3. Enter the BIOS and set your DRAM to 533Mhz. Set your timngs to 5 - 5 - 5 - 15 and test for boot.

 

Then install the two 5400's in Dimm 2 and Dimm 4. Test for boot.

 

How can i set timings to 5-5-5-15 ?? i'm not a specialist to do that :)

If you can detail the procedure

Thanks

[DerekT]

How can i set timings to 5-5-5-15 ?

 

Enter your BIOS and in the "Advanced Settings":

 

 

NorthBridge Chipset Configuration:

 

Configure DRAM Timing By SPD = Manual

 

Mem Remap Feature = Disabled

DRAM CAS# Latency : 5

RAS# to CAS# Delay : 5

DRAM RAS# Precharge : 5

DRAM RAS# Activate to Precharge : 15

[ch3style]

Thanks for your help but it doesnt work.

 

I had test with 5-5-5-15 and 3-3-3-8 (original timing of 4300) :mad:

 

It very strange no ???

[DerekT]

Not really. The problem is that you have a set of DDR2 533 and a set of DDR2 667. Now to use them both, you usually have to drop a speed lower than the lowest set. You can't do that because your 533 is already the lowest for that board.

 

If you had 2 sets of 667, then you could drop your speed to 533 and very likely this would work but with one set of 533's and no 400Mhz to drop then it can become problematic. You are in a tough area with 4 X 1024 and those non-identical sticks.

 

You can try to insert the DDR2 533 in Dimm 1 and Dimm 3. Then the DDR2 667 in Dimm 2 and Dimm 4 and retest.

[ch3style]

It doesn't work too :(

 

I had test to overclock 533's to 667 and add 667's but it the same result.

 

I had passed 667's to 533 and add 533's same result :(

[DerekT]

It's not an easy thing to mix and match with 4GB. Windows XP 32Bit doesn't see the entire 4GB anyway and usually only sees about 3GB so you probably are better off using 2GB in your system.

 

http://www.houseofhelp.com/forums/showthread.php?t=49816

 

And that's when it works.

[ch3style]

I have 4 x 512 and not 4GB :)

[DerekT]

Have you set the Command rate to 2T?

EDIT: My mistake. Your board automatically sets to 2T so you are fine there.

[ch3style]

Have you set the Command rate to 2T?

 

No, i dont know what is it ?

[RAM GUY]

The PSU you have listed is only 380 Watts, is that what you are using?

If so I would suggest 500 Watt minimum for the configuration you have listed and have you tested each of the module sets at their tested settings?

[ch3style]

The PSU you have listed is only 380 Watts, is that what you are using?

If so I would suggest 500 Watt minimum for the configuration you have listed and have you tested each of the module sets at their tested settings?

 

I have a antec true power 380 W, i think too its not enough :(

 

The motherboard is connected with 12 pin ATX :(

 

Thanks all for your help, i will buy PSU 500 W now

[RAM GUY]

I would suggest our HX520W PSU if you have not got a new one yet!