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ROBERTO1223

I don't spend enough time here

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27th August 2004

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#1 14 years ago

1- does somebody know if i can have dual channel DDR ram and DDR(non-dual channel) ram at the same time in same pc?? (my comp does support dual channel DDR) 2- do u know if i can use ram sticks with different speeds? (400mhz-133mhz etc..)




D-Fens

uwe bolltastic!

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2nd May 2003

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#2 14 years ago

what do you mean? Dual channel is a motherboard feature, not a ram specific




C38368

...burning angel wings to dust

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14th February 2004

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#3 14 years ago

To answer question #1: If DDR RAM fits into the slot, then SDR will not, and you cannot mix them. There are some motherboards that have been created over the years that support modules of different types, but I don't believe that there are any boards that have both DDR and SDR slots, as I don't believe the memory architectures are compatible. DDR SDRAM and RDRAM both have 184-pin configurations, but are physically different, and cannot be interchanged. So to sum: you cannot mix-n-match incompatible memory. However, there's one caveat: if you mix-n-match two DDR stick of different batches, you may not be able to run them in dual channel. If you want guaranteed DC memory, then your best bet is to just buy a DC kit.

To answer question #2: Somewhat answered above, but: you can use memory of different speeds as long as they are of the same architecture. Meaning that you can run PC2700 and PC3200 DDR SDRAM together, but you cannot run (for example) PC133 SDR SDRAM with PC1066 RDRAM.




emonkies

I'm too cool to Post

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17th July 2003

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#4 14 years ago

Noop, SDR will not fit in DDR mobo slot. The notch is moved so that you cannot accidently put the wrong RAM in the slot.

Dual Channel refers to dual channel architecture. It works similar to the idea of SLI (scan line interleave)

When one memory module is transmitting the other is recharging. This gives you a higher constant throughput.

The motherboards memory controller chipset has to support Dual channel mode.

As of this time I am only aware of Nforce, Nforce2, and the Athlon 64 socket 939 motherboards supporting dual channel mode.

I am not familiar with whether Intel chipsets support the feature or if VIA and SIS chipsets support the feature.




Big Lebowski

This is not nam

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6th December 2003

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#5 14 years ago

my comp can fit both DDR and SDR ram at the same time but wont funktion with it.. I found out when i orderd some extra DDR ram for my comp but they sent SDR ram instead and my comp whent dead.. so i had to order an extra time...




BAM

I pretend I'm cooler than AzH

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27th April 2003

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#6 14 years ago
ROBERTO1223 2- do u know if i can use ram sticks with different speeds? (400mhz-133mhz etc..)

yes but they will both run at slowest speed so its kinda useless to buy 400mhz if you have 133 mhz in comp ..




C38368

...burning angel wings to dust

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14th February 2004

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#7 14 years ago
Anlushac11Noop, SDR will not fit in DDR mobo slot. The notch is moved so that you cannot accidently put the wrong RAM in the slot. Dual Channel refers to dual channel architecture. It works similar to the idea of SLI (scan line interleave) When one memory module is transmitting the other is recharging. This gives you a higher constant throughput. The motherboards memory controller chipset has to support Dual channel mode. As of this time I am only aware of Nforce, Nforce2, and the Athlon 64 socket 939 motherboards supporting dual channel mode. I am not familiar with whether Intel chipsets support the feature or if VIA and SIS chipsets support the feature.

nForce doesn't support dual channel. [Later] nForce2, nForce3, and most (if not all) newer AMD K8 chipsets do. *ALL* Intel chipsets now support dual channel--Intel debuted it on the i865 and i875 platforms, VIA and SiS followed suit. As an aside, because of the memory bus architecture Intel has elected to use with their skt478 CPUs, dual channel memory was their baby. AMD joined the bandwagon because who doesn't want loads of bandwidth (nevermind that the A64 loves it like the P4 does)?