On Sun, 2004-11-28 at 21:18, Bill Shaw wrote:
> Does the ECS K7S5A board allow the use of DDR or SDRAM?
> Or is it just SDRAM?
Both. The SiS735 has support for both [Single Data Rate] Synchronous
and Double Data Rate Synchronous DRAM. 2 DIMMs each. They cannot be
used simultaneously.
> Doing a quick search I found a few problems that are similar:
> -Two sticks of SDRAM RAM seem to cause problems.
If they have different timings. Some earlier SDR SDRAMs lack and
on-module SPD chip. In general, I don't like to mix different modules
with different SDRAM ICs.
> Try one or DDR.
FYI, JEDEC DDR specifications are as follows (for non-Registered):
PC1600/DDR200 Max 6 Banks (3 DIMMs)
PC2100/DDR266 Max 4 Banks (2 DIMMs)
PC2700/DDR333 Max 4 Banks (2 DIMMs)
PC3200/DDR400 Max 2 Banks (1 DIMM)
Now the SiS only has 2 DDR DIMM slots, and I do not believe it has more
than two.
> -Disable ACPI OS support in the CMOS.
> - If your using a modem avoid the first PCI slot since it's shared
> with the AGP slot.
???
The AGP bus is its own, separate 32-bit PCI bus with a higher clock and
special capabilities (long story).
In fact, the southbridge/PCI/Legacy PC (LPC) is traditionally a
0.125-0.5GBps (32-64b@33-66MHz) bridged PCI bus off of the
northbridge/AGP.
In the case of the SiS735 chipset, it is a single chip. EV6 to the
CPU. Everything else is bridged off of its internal HyperTransport
interconnect -- including the northbridge/AGP to southbridge/PCI.
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