New build A7V8X CPU / ram speed issues 2.8Mhz / 333Mhz Athlon

[Zardoz]

Just built a new system. Can't get it to boot at the correct speed.
Should be 2500Mhz core speed / 400Mhz RAM but I've realised that the
CPU has a 333Mhz FSB. The only combo available in my BIOS is 2053Mhz /
333Mhz


Stuff I ordered to start with

A7V8X
AMD Athlon XP2800 333FSB 512kb L2 Cache Barton
Twinmos M-tec 512mb Ddr333 Pc2700 Cl2.5 Memory Module


First the RAM only showed up as 256Mb (so I stuck it in my old PCChips
board and it registered as 512). I've sent it back and got DDR400 by
return .. but of course the CPU has only got 333Mhz FSB.

So, how do I run a 2500Mhz 333Mhz combo? I've got the 1006 version
BIOS which I could do with updating but I havn't got a FDD (one of the
reasons I bought the board was that I saw you could update the BIOS
from Windows - hah!)

Cheers

 

[RonK]

2800+ runs at 2.25GHz, using a 166MHz DDR FSB (effectively 333MHz).

 

[Zardoz]

Right - I made an assumption based on the available core speeds:

2049Mhz
2500Mhz

No 2.25Mhz available??

 

[Robert Gault]

Just built a new system. Can't get it to boot at the correct speed.
Should be 2500Mhz core speed / 400Mhz RAM but I've realised that the
CPU has a 333Mhz FSB. The only combo available in my BIOS is 2053Mhz /
333Mhz


Stuff I ordered to start with

A7V8X
AMD Athlon XP2800 333FSB 512kb L2 Cache Barton
Twinmos M-tec 512mb Ddr333 Pc2700 Cl2.5 Memory Module


First the RAM only showed up as 256Mb (so I stuck it in my old PCChips
board and it registered as 512). I've sent it back and got DDR400 by
return .. but of course the CPU has only got 333Mhz FSB.

So, how do I run a 2500Mhz 333Mhz combo? I've got the 1006 version
BIOS which I could do with updating but I havn't got a FDD (one of the
reasons I bought the board was that I saw you could update the BIOS
from Windows - hah!)

Cheers

I've the same board, XP2500+, and 256MB DDR400 RAM. BIOS A7V8xx07.awd
displays a 2.2GHz entry with 200/400 memory. This is a list with Auto
settings for the CPU. Since my XP2500+ is locked, all I can do is change
the FSB (which is what selections from the Auto list do.)

You should be able to run faster with an XP2800+. Keep in mind that the
true clock rate for these locked CPU's = multiplier x FSB. The XP2500+
is locked at 11 which gives 11x100=1.1G 11x133=1.5G 11x166=1.8G and
11x200=2.2G

I'd say your RAM is the limiting factor not your CPU, but you could try
changing your BIOS version.

 

[RonK]

Here's a link for the XP2800+ specs.
http://www6.tomshardware.com/cpu/20021001/xp_2800-01.html