Which RDRAM can I use on ABIT TH-7 II Motherboard--PC800 or PC1066?Both?

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ABiT-TH-7 II Raid.
I am putting together an RDRAM-P4 system, but I have never dealt with this type before. I do know it must be purchased in pairs. My question is: Is PC1066 workable on an PC800 MB? Regular SDRAM PC-133 is backwards compatible with PC-100, does the same hold for RDRAM?
I want use Samsung RDRAM-based on reviews.
I dont really want to OC'k PC800 to PC1066-I hear RDRAM is hot enough "normal"
I couldnt find what I was looking for at ABiT site--can someone help?
Thanks.

 

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Anyone?

 

[sep]

Good Question!

I do beleive you can use PC1066 in a PC800 system, because if you install a CPU thats running at 400FSB then the ram is only going to run at PC800 speeds. The only difference is the RDRAM speed.

-JC

 

[wicktron]

Yes you may use PC1066 modules in the TH7-II, however, it will force you to use a 4x RD multiplier, whereas with PC800, you can use a 3x or 4x multiplier. The thing is with PC1066 modules in the TH7-II, in order to get a real nice memory bandwidth, you will be limited by the DRCG's on the board rather than the memory. The optimal CPU to be paired with the TH7-II is a low multiplier P4 so you can hit high FSB's with a 3x RD multiplier and get the best of both CPU speed and memory bandwidth. I'd say a 2.26b would be a wonderful choice for a TH7-II. Also, the memory of choice to do high FSB OC'ing with the TH7-II would have to be 16-device 256mb 45ns Samsung modules. These modules have been known to hit almost 150x4 (RAM limitation) and between 160-170x3 on average. 170+x3 if you are lucky. Another good choice for RAM is the 8-device 128mb 32ns Samsung modules. These have been known to hit around 150-160x4 (DRCG limitation).

Ask on if you have more queries about the TH7-II... The board is awesome!
NOTE: There have been in-depth discussions about the TH7-II, including what RAM to use, DRCG mods, optimal CPU, and other like discussions by people more knowledgable than myself in the ard Forums.

 

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Thanks-going for a search now.....