P2700 mem with 400/533MHz bus - Tech Support Forums

gshrop · January 30th, 2004, 11:10 AM

I have a VIA P4M266/A which supports 400/533 MHz front-side bus. Is it alright to use a stick of 512 P2700 in it?

gshrop · January 30th, 2004, 11:16 AM

By the way, the processor is a Celeron 1.8g

ArcticFox · January 30th, 2004, 11:27 AM

What board is it? You only named the chipset.

To answer your question - with the P4, yes you can use DDR333 with it. Would I? No, I'd grab DDR400 to match the bus speed of your Celeron (400Mhz FSB). You may notice slightly slower benchmarks because of it, but it's nothing to really worry about.

gshrop · January 30th, 2004, 11:33 AM

The board is a PC Chips M925a. I am having a problem when I enable L2 cache is AMI bios. Windows resets a boot.

ArcticFox · January 30th, 2004, 11:41 AM

For that problem, check to make sure your FSB is set to 400, multiplier at whatever it is stock (you can't change it anyways), and your RAM at 333Mhz. Running them both at 400 will cause issues as your memory isn't meant to run at 400.

Also, disable ACPI and see if that helps, then re-enable your L2.

gshrop · January 30th, 2004, 12:20 PM

OS Name Microsoft Windows XP Professional
System Model M925
Processor x86 Family 15 Model 1 Stepping 3 GenuineIntel ~1799 Mhz
BIOS Version/Date American Megatrends Inc. 07.00T, 4/2/2001
Total Physical Memory 512.00 MB
Drive C:
Description Local Fixed Disk
Compressed No
File System FAT32
Size 37.27 GB (40,022,605,824 bytes)

This is the current bios setup:
cpu ratio=8.0x
cpu frequency=100mhz / grayed out
sdram timing=enabled
sdram frequency=100mhz (choices/100,133,166,auto)
sdram latency 2.5v
interleave=disabled
system bios cache=enabled
L2 cache=disabled

ACPI does not appear in set-up

Are there any references to L2 cache in Winxp as far as enabling or disabling that you know of. I have seen references to this in other threads.

ArcticFox · January 30th, 2004, 12:27 PM

No, you can't change the cache settings in XP.

Somewhere in your BIOS there is a setting for ACPI, look again for something like Power Management.

If I'm not mistaken, you are running your RAM at either PC3200 or PC1600 speeds, I'm not sure which. See if you can manually set your memory speeds and possibly lower it.

gshrop · January 30th, 2004, 12:30 PM

I'll try it and get back with you with the results.

Thx

gshrop · January 30th, 2004, 09:16 PM

When I disable ACPI I get a black screen and the system does not repond. Tried various combination of bios settings with L2 cache enabled, none worked. Whenever L2 is enable WinXp crashes and resets the system. Could there be a problem with the processor. or XP?

Uncle Bob · January 30th, 2004, 09:45 PM

Quote:

Originally posted by gshrop
I have a VIA P4M266/A which supports 400/533 MHz front-side bus. Is it alright to use a stick of 512 P2700 in it?

I went to the Via site. Your board wasn't listed. May just be an older board. Not many of the Via boards will support ram above DDR266. If your PC2700 is not "supported" and it runs and is stable that would mean it's running as fast as the board will support,(PC2100 or PC1600)