A7V266 + 2600+

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Zdenek Sojka

Hello there,

I have an ASUS A7V266 MB, and I would like to upgrade it.
I suppose, it supports only 266MHz bus, but is it possible to get there eg.
Barton 2600+ (333MHz bus)?
http://www.asus.com/products/mb/socketa/a7v266/overview.htm
In "release notes", there is mentioned support for just 700MHz - 1400MHz,
but in new BIOS release, there is Support AMD AthlonXP 2600+ . I have
already that BIOS flashed.
http://www.asus.com.tw/support/down...&l2_id=10&l3_id=9&m_id=1&key_f_name=a1011.zip

Will that Barton run at its 1920MHz, will it run just at 1533MHz, or it wont
run at all?
(i dont want to unlock its multiplier...)

May I get there a Throughberd 2400+ (266MHz bus) ? I suppose yes, but I am
unsure, as that MB is not mentioned in AMD's Recommended MBs for that CPU.

Does anybody have experience?
(I shall get Barton 2600+ as object of claim (my old MB destroyed old CPU,
but I have bought one already), maybe I can change it for 2400+ with 266MHz
bus) (2600+ / 266 is not available)

Thanks
Zdenek Sojka
 
Zdenek Sojka said:
Hello there,

I have an ASUS A7V266 MB, and I would like to upgrade it.
I suppose, it supports only 266MHz bus, but is it possible to get there
eg.
Barton 2600+ (333MHz bus)?
http://www.asus.com/products/mb/socketa/a7v266/overview.htm
In "release notes", there is mentioned support for just 700MHz - 1400MHz,
but in new BIOS release, there is Support AMD AthlonXP 2600+ . I have
already that BIOS flashed.
http://www.asus.com.tw/support/down...&l2_id=10&l3_id=9&m_id=1&key_f_name=a1011.zip

Will that Barton run at its 1920MHz, will it run just at 1533MHz, or it
wont
run at all?
(i dont want to unlock its multiplier...)

May I get there a Throughberd 2400+ (266MHz bus) ? I suppose yes, but I am
unsure, as that MB is not mentioned in AMD's Recommended MBs for that CPU.

Does anybody have experience?
(I shall get Barton 2600+ as object of claim (my old MB destroyed old CPU,
but I have bought one already), maybe I can change it for 2400+ with
266MHz
bus) (2600+ / 266 is not available)
Click to expand...

I cannot comment accurately as I don't know your motherboard, but it sound
as though you have a similar board to mine. I have a KT333 chipset, so while
it should support all CPUs, my board only truly supports up to a 133MHz FSB
(DDR 266). If the FSB is turned up above 133, the PCI cards and AGP cards
are also turned up and my system won't operate properly, so the highest
processor I can use is the Thoroughbred 2400+ (133MHz / DDR266).

In theory my board can turn the FSB up to 250MHz (DDR 500), but in reality
it can't go above about 160MHz because the PCI and AGP cards cannot be fixed
at 33MHz, where they belong. If your motherboard has the option of
overclocking the FSB to 166, but locking the PCI and AGP circuits, then you
*might* be about to run a Barton at its correct 166MHz. I imagine the
multiplier will be automatically detected, so unless you can 'overclock' it
to the correct speed, then you will be stuck at 266 x your multiplier
instead of 333 x!

Check your manual and see what your theoretical maximum FSB is - I have the
KT333 chipset and you have the KT266 chipset, but my 333 chipset can be
turned up to 500, so maybe your 266 chipset can be turned up to at least
333!! But also check to see if it can lock the AGP and PCI frequencies. I
believe this requires a 1/5 divider (can someone jump in with terminology??)

If you have already bought the CPU, then why not plug it in and see what
happens! The voltage and multiplier should autodetect, but the FSB might be
confused - so manually set it to 133 (266) in the BIOS and work from there.
Don't forget the heatsink before you switch it on though!!
 
Gareth Tuckwell said:
I cannot comment accurately as I don't know your motherboard, but it sound
as though you have a similar board to mine. I have a KT333 chipset, so while
it should support all CPUs, my board only truly supports up to a 133MHz FSB
(DDR 266). If the FSB is turned up above 133, the PCI cards and AGP cards
are also turned up and my system won't operate properly, so the highest
processor I can use is the Thoroughbred 2400+ (133MHz / DDR266).

In theory my board can turn the FSB up to 250MHz (DDR 500), but in reality
it can't go above about 160MHz because the PCI and AGP cards cannot be fixed
at 33MHz, where they belong. If your motherboard has the option of
overclocking the FSB to 166, but locking the PCI and AGP circuits, then you
*might* be about to run a Barton at its correct 166MHz. I imagine the
multiplier will be automatically detected, so unless you can 'overclock' it
to the correct speed, then you will be stuck at 266 x your multiplier
instead of 333 x!

Check your manual and see what your theoretical maximum FSB is - I have the
KT333 chipset and you have the KT266 chipset, but my 333 chipset can be
turned up to 500, so maybe your 266 chipset can be turned up to at least
333!! But also check to see if it can lock the AGP and PCI frequencies. I
believe this requires a 1/5 divider (can someone jump in with terminology??)

If you have already bought the CPU, then why not plug it in and see what
happens! The voltage and multiplier should autodetect, but the FSB might be
confused - so manually set it to 133 (266) in the BIOS and work from there.
Don't forget the heatsink before you switch it on though!!
Click to expand...

Hello,

I tried 133 * 5,5, the system booted up. Also 145MHz FSB worked.
But 166MHz didnt work at all, PCICLK was 42MHz, its so much.

btw, my Athlon Thunderbird, which is there already, was able to change
multiplier. But I didnt unlock it. Is it possible I was cheated while buying
that CPU? It were these Athlons unlocked? How can I determite its original
speed? (preferably without removing cooler, as its very hard)

So I wont test my Barton yet, maybe later - but still, Im sure it wont work
at 166 FSB.
And 133 FSB is slower than 2400+ with 133 FSB by default. Hope that will
work, as my MB cannot set its output to 1,65 V - only 1,7 in BIOS... is that
too big difference?
Or will it be able to 1,65 V when setting CPU Default (Vcc is then generated
according to CPU VID configuration)?

Have a nice day
Zdenek Sojka
 
Zdenek Sojka said:
http://www.asus.com.tw/support/down...&l2_id=10&l3_id=9&m_id=1&key_f_name=a1011.zip I

Hello,

I tried 133 * 5,5, the system booted up. Also 145MHz FSB worked.
But 166MHz didnt work at all, PCICLK was 42MHz, its so much.

btw, my Athlon Thunderbird, which is there already, was able to change
multiplier. But I didnt unlock it. Is it possible I was cheated while buying
that CPU? It were these Athlons unlocked? How can I determite its original
speed? (preferably without removing cooler, as its very hard)

So I wont test my Barton yet, maybe later - but still, Im sure it wont work
at 166 FSB.
And 133 FSB is slower than 2400+ with 133 FSB by default. Hope that will
work, as my MB cannot set its output to 1,65 V - only 1,7 in BIOS... is that
too big difference?
Or will it be able to 1,65 V when setting CPU Default (Vcc is then generated
according to CPU VID configuration)?

Have a nice day
Zdenek Sojka
Click to expand...
as I look to spec now, my MB also supports (in BIOS) multiplier up to 14x -
but 2400+ has 15x
Will it override?

Thanks
Zdenek Sojka
 
Zdenek Sojka said:
as I look to spec now, my MB also supports (in BIOS) multiplier up to
14x -
but 2400+ has 15x
Will it override?

Thanks
Zdenek Sojka
Click to expand...

My Athlon thoroughbred 2400+ is supposed to run at 15x133MHz (2000MHz). My
motherboard only officially supports up to 12.5x multiplier, but there is an
auto-detect option, which correctly finds and runs it at 15x. The FSB of
133MHz is correct for this chip, and anything higher is overclocking. The
PCI speed should be 33 MHz, which is reached by dividing the FSB by 3 or 4
as follows: /3 for a 100MHz FSB and /4 for a 133MHz bus. There is also a /5
divider for a 166MHz FSB, but our boards can't do that, which is why they
don't really support barton and 166MHz chips!. So you should normally run at
133/4 = 33MHz, but when you turn up the FSB for the CPU, you also turn up
the speed of the PCI and AGP circuits, so it is probably not the processor
that is failing at these higher FSB speeds, but the other parts of the
motherboard - try turning up the multiplier on the CPU instead and keep the
FSB to the standard 133MHz. Read the link about Multiplier Cross Reference
on this web page (courtesy of Wes - hope you don't mind Wes?!):

http://mysite.verizon.net/res0exft/cpu.htm

I would expect that choosing the default voltage setting in the BIOS should
auto-detect the voltage for you CPU. My Athlon 2400+ Thoroughbred B chip
runs at 1.65v, but at normal speeds I can turn this down to 1.5v (less heat)
and for overclocking it can be turned up a little to reach higher speeds. If
you plan to overclock, then setting it to 1.7v is a good start, otherwise,
just leave it at the default setting and all should be OK.

To find out the correct speed for your processor, you either have to look at
the chip itself, or just leave everything at default settings in the BIOS,
reboot and check it all in the BIOS monitor page or in Windows using some
monitoring software.
 
Gareth Tuckwell said:
My Athlon thoroughbred 2400+ is supposed to run at 15x133MHz (2000MHz). My
motherboard only officially supports up to 12.5x multiplier, but there is an
auto-detect option, which correctly finds and runs it at 15x. The FSB of
133MHz is correct for this chip, and anything higher is overclocking. The
PCI speed should be 33 MHz, which is reached by dividing the FSB by 3 or 4
as follows: /3 for a 100MHz FSB and /4 for a 133MHz bus. There is also a /5
divider for a 166MHz FSB, but our boards can't do that, which is why they
don't really support barton and 166MHz chips!. So you should normally run at
133/4 = 33MHz, but when you turn up the FSB for the CPU, you also turn up
the speed of the PCI and AGP circuits, so it is probably not the processor
that is failing at these higher FSB speeds, but the other parts of the
motherboard - try turning up the multiplier on the CPU instead and keep the
FSB to the standard 133MHz. Read the link about Multiplier Cross Reference
on this web page (courtesy of Wes - hope you don't mind Wes?!):

http://mysite.verizon.net/res0exft/cpu.htm

I would expect that choosing the default voltage setting in the BIOS should
auto-detect the voltage for you CPU. My Athlon 2400+ Thoroughbred B chip
runs at 1.65v, but at normal speeds I can turn this down to 1.5v (less heat)
and for overclocking it can be turned up a little to reach higher speeds. If
you plan to overclock, then setting it to 1.7v is a good start, otherwise,
just leave it at the default setting and all should be OK.

To find out the correct speed for your processor, you either have to look at
the chip itself, or just leave everything at default settings in the BIOS,
reboot and check it all in the BIOS monitor page or in Windows using some
monitoring software.
Click to expand...

Hello,

so, I have installed the new CPU (Thoroughbred 2400+, the same as you).
Also, my MB supports multipliers up to 14x and Voltage minimum 1,7 (maybe
1,675 for Palomino).
I let setting jumper set to Athlon (not Palomino), all others (multiplier,
FSB, voltage) is at CPU Default. Also, I turned off the JumperFree mode.

All works OK, except that the CPU is detected as Duron 2000MHz (not matter,
just different NameString set by BIOS, cen be reset by boot diskette or so)
(I have the newest, 1015.2 BIOS). Voltage is (by ASUS Probe) 1,68V,not so
much for that CPU.

I think i wont play with FSB etc. , no overclocking :-)

Thanks for advices, it works :-)
Zdenek Sojka
 
Hello,

so, I have installed the new CPU (Thoroughbred 2400+, the same as you).
Also, my MB supports multipliers up to 14x and Voltage minimum 1,7 (maybe
1,675 for Palomino).
I let setting jumper set to Athlon (not Palomino), all others (multiplier,
FSB, voltage) is at CPU Default. Also, I turned off the JumperFree mode.

All works OK, except that the CPU is detected as Duron 2000MHz (not matter,
just different NameString set by BIOS, cen be reset by boot diskette or so)
(I have the newest, 1015.2 BIOS). Voltage is (by ASUS Probe) 1,68V,not so
much for that CPU.

I think i wont play with FSB etc. , no overclocking :-)

Thanks for advices, it works :-)
Zdenek Sojka
Click to expand...

The Athlon/Palomino jumper should be set to Palomino.
"Athlon" in that context means OLDER Athlon T'Bird (up to
1.4GHz), while Palomino is for Palomino or any newer CPU
like your T'Bred.
 
kony said:
The Athlon/Palomino jumper should be set to Palomino.
"Athlon" in that context means OLDER Athlon T'Bird (up to
1.4GHz), while Palomino is for Palomino or any newer CPU
like your T'Bred.
Click to expand...

Well, but it works anyway... or can I damage the CPU while using this
settings?
The only difference by manual should be "the way frequency is generated" and
0,25 V lesser CPU voltage - but its 1,68 now, so no problem seems now...
Im afraid when I switch it to Palomino, my CPU will burn, PC explode etc...
(Im happy that it works)

Zdenek Sojka
 
Well, but it works anyway... or can I damage the CPU while using this
settings?
The only difference by manual should be "the way frequency is generated" and
0,25 V lesser CPU voltage - but its 1,68 now, so no problem seems now...
Im afraid when I switch it to Palomino, my CPU will burn, PC explode etc...
(Im happy that it works)

Zdenek Sojka
Click to expand...

It should be fine if you leave it alone, but some boards may
use that jumper to choose the on-die thermal monitor instead
of one in the socket. You shouldn't need 1.68V though, if
your board reduces voltage by 0.25V then I would go ahead
and change the jumper, since it should be stable at the
default voltage instead of this overvoltage and it will
produce less heat. It should not "burn, explode, etc", your
CPU, but if for some reason your board is less stable then
just switch the jumper back again.
 
Hello,
I tried to remove the jumpers, but it was too hard to do it just by hand...
so I will let them as they are so far.
The 1.68V is automatic for Palomino settings, so I think, the AUTO settings
overdrives the set values.
(with current settings, there should be 1.7V - with Palomino settings, there
would be 1.675)
Altough it is not 1.65 V as it should be, the MB prolly would not be able to
do such a low voltage.

Have a nice day
Zdenek Sojka
 
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