Mixing 5-5-5-12 and 5-5-5-18 memory.

[shadowphax]

I currently have the following system

 

• Asus P5N32-E Sli

• Intel Core 2 Quad Q6600 2.4Ghz

2GB from 2 x 1Gb Corsair XMS 2 Twin2x2048-6400 800Mhz DDR2 Memory 5-5-5-12

• Windows XP Pro (32 bit)

• 2 x Nvidia 8800gt Sli

• ******** Toughpower 750W PSU

 

I am wanting to go up to 4Gb in order to replace the operating system with Windows 7.

 

The only memory I can find to add another 2Gb of memory is the same Corsair Twin 2x2048-6400 but the latency is 5-5-5-18.

 

Would this 5-5-5-18 memory work OK with my existing 5-5-5-12 memory?

 

The forums seem to says that dropping the memory speed to 667Mhz may help as shown here

 

Would it be better to simply replace the existing 2Gb of memory with a new set totalling 4Gb?

 

Thanks for any help.

[Synthohol]

Would it be better to simply replace the existing 2Gb of memory with a new set totalling 4Gb?

absolutely yes a 2x2 single kit is best.