Bios question

[snidy]

What should these settings be?
PCI to DRAM Prefetch, Enable or Disable?
Byte Merge, Enable or Disable?

 

[AquamanA]

Good question.

I'll give you a bump^

My a7v133 starts to totally drag when PCI to DRAM Prefetch is enabled.
Byte Merge is stable and improves performance.

Can someone offer some explanation into what PCI to DRAM Prefetch is and why it's dragging my system down to a crawl?

 

[bacillus]

copied from lost circuits. defaults in brackets

Byte Merge (enabled)

Instead of transferring single bytes at a time, burst mode uses a packaging transfer protocol to merge individual writes into a single 32 bit block of data (4 words) and transfer them on a single command. A prerequisite for execution of byte merge is that the individual bytes posses a high locality (are coherent data)

PCI-to-DRAM Prefetch (enabled)

In order to avoid repetitive accesses to the system memory for retrieving small pieces of data, an entire area of memory can be prefetched, based on the locality of coherent data. This means that the data are already in the buffer before they are needed and can be accessed with very low latency. This mode can enhance sound card and IEEE 1394 PCI card performance.