On Fri, Jan 28, 2005 at 01:46:22AM -0800, Declan Moriarty wrote:
P1-233Mhz (I presume a 66 Mhz bus) 142 MB/S Intel 430 chipset K6/2-350Mhz 100 Mhz bus(pc100 ram) 127 MB/S SiS chipset k6/3-500Mhz 100 Mhz bus (pc100 ram) 130 MB/s Via Chipset P3 Coppermine -730Mhz 100 Mhz bus? 242 MB/S Intel 810 chipset (It's loaded with pc100 ram) AthlonXP-2.6Ghz 333 Mhz bus (?ddr RAM) 730 MB/S Via Chipset
Any ideas?
How many RAM-slots are attached?
Just two
Probably the P3 is using two RAM banks
in parallel but all other just access only to one bank at a time.Actually, the P3 has only one bank - One dimm 64MB of pc100 ram. It says nothing about ddr. The Dimm has 8x Hyundai GM72V66841ET7K chips.
(or is DDRRAM attached? double datarate: it reads at both edges of the clock).
The Athlon2.6G is also using ddr ram with a 3 times higher clock,
How come a p233 with a 66 Mhz bus goes faster? It's unlike the pc industry to drop something like ddr once they latch onto it.your list absolutely makes sense: all older 100MHz RAMs have 130-140MB/s (single data rate)
I'll have to ressurect one of those K6 boards and play around, if only to check the ram out.the P3 has 2*120MB/s (double data rate) the Athlohn has 2*3*120MB/s (double data rate, 3 times higher clock)
It is nice to see, that CPU speed has nothing to do with RAM speed.
(at least at higher clocks). However DRAM is getting complicated these days. I am not at the state of art level in this topic. But I would expect
1-2 GBytes/s RAM transferrate at high end PC's today.
--
With Best Regards,
Declan Moriarty -- Author: Declan Moriarty INET: [EMAIL PROTECTED]
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