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Need a little more info about RDRAM + OC'ing

B

brinstar117

Senior member
Reading the numerous threads concerning the P4 1.6A have finally pushed me to build a new rig.

However, due to the myriad of choices available I'm having a tough time choosing between a RDRAM setup and a DDR setup. I'm leaning towards RDRAM (since it has more bandwidth) right now since the price difference between the two types of memory isn't as large as before.

However, as I understand... in order for an RDRAM based system to overclock... the memory multiplier must be lowered.

Is there any RDRAM that can stably overclock without lowering the multiplier?

I'd like to ideally get the bus to 133Mhz. If there is any RDRAM capable, where can I get it? Thanks!
 
The multiplier does not have to be lowered.

If you purchase Mushkin or Corsair SAMSUNG RDRAM, most people say that it can overclock to PC1066 levels, using the 133MHz FSB.


If your RDRAM cannot hit PC1066, simply lower the multiplier from 4 to 3, so at 133MHz FSB, it will be operating at PC800 level.
 
Brinstar117, here's more info that could help you deciding which one to get.
Try reading one of the discussions Here or other Rambus related discussions.

 
Listen to AndyHui, run straight up PC800... especially over DDR at odd overclock speeds. Why people bother running a Pentium 4 with DDR above 2.2GHz is just splitting hairs as far as cost goes. Its better to run RDRAM at those speeds.
 
The best RDRAM for overclocking (PC1066, PC1200 speeds) is Samsung RDRAM chips on a Samsung-made PCB. I think Corsair may just be relabeled Samsung (not sure), but Mushkin is not; people have replaced their Mushkin with Samsung in order to attain higher speeds. Moreover, the best Samsung memory to get for overclocking is the lower density, double-side type.

Googlegear sells both single-sided and double-sided Samsung RDRAM modules. The double-sided are a few dollars more expensive; be sure to get those.
 
RDRAM has no problem whatsoever reaching very high speeds, the only issue can be substandard clock generator chips on your mainboard.
 
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