How do L1 bridges affect a CPU?

[Guest]

I'm looking for a new CPU for my Abit KT7-RAID mobo, and I read that it
supports a 1400 GHz Athlon Thunderbird CPU, but only if the L1 bridges
are disconnected.

What if I end up getting a lower speed CPU (like 1333, 1300, 1200,
1100, or 1000)... what difference would the L1 bridges being connected
or disconnected make? How does that affect the CPU? I'm not planning
on doing any overclocking.

Also, do CPUs have their L1 bridges disconnected by default when
shipped from the factory?

 

[Wes Newell]

I'm looking for a new CPU for my Abit KT7-RAID mobo, and I read that it
supports a 1400 GHz Athlon Thunderbird CPU, but only if the L1 bridges
are disconnected.

I ran a 2100+ XP at 2400MHz in mine. Forget abit's cpu list. It's just
party line. See My server in sig line.

What if I end up getting a lower speed CPU (like 1333, 1300, 1200, 1100,
or 1000)... what difference would the L1 bridges being connected or
disconnected make? How does that affect the CPU? I'm not planning on
doing any overclocking.

Also, do CPUs have their L1 bridges disconnected by default when shipped
from the factory?

Some did, some didn't. All explained on link in sig. Still got questions
after reading that, ask away.

 

[Guest]

I ran a 2100+ XP at 2400MHz in mine. Forget abit's cpu list. It's just
party line. See My server in sig line.


Some did, some didn't. All explained on link in sig. Still got questions
after reading that, ask away.

OK, thanks. I'm not looking to get the fastest CPU possible for my
board, so I think I'll just get one of the Athlon T-birds.

 

[Wes Newell]

OK, thanks. I'm not looking to get the fastest CPU possible for my
board, so I think I'll just get one of the Athlon T-birds.

You can do whatever you want, but an old T-bird is the worst choice you
could make. And be advised that there's 2 models of the 1400, an A
(100MHz), and B (133MHz FSB). You need the A, and it's not going to be
cheap since a lot of people like you think that it's the fastest CPU they
can use in their boards. The safest bet for you would be a 2400+ XP. If
it's a locked model it will default 1500MHz, and if it's an unlocked
model it will default to 2000MHz. It also has SSE instructions that the
T-bird doesn't, and comsumes a lot less power than the 1400, meaning it
will run a lot cooler. Ok, here's your best choices from ebay. 2100+ Tbred
B core XP's that are unlocked. Will default to 2000MHz in your board. If
that's too fast you can lower the speed to 1500MHz in the bios, or raise
it to 2400MHz with a little luck. And these are cheap.

http://cgi.ebay.com/AMD-Athlon-XP-2...ryZ44935QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

http://cgi.ebay.com/Athlon-XP-2100-...ryZ44935QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[Guest]

You can do whatever you want, but an old T-bird is the worst choice you
could make. And be advised that there's 2 models of the 1400, an A
(100MHz), and B (133MHz FSB). You need the A,

You mean B (100MHz) and C (133Mhz). Yeah, I need the B.

and it's not going to be
cheap since a lot of people like you think that it's the fastest CPU they
can use in their boards. The safest bet for you would be a 2400+ XP. If
it's a locked model it will default 1500MHz, and if it's an unlocked
model it will default to 2000MHz. It also has SSE instructions that the
T-bird doesn't, and comsumes a lot less power than the 1400, meaning it
will run a lot cooler. Ok, here's your best choices from ebay. 2100+ Tbred
B core XP's that are unlocked. Will default to 2000MHz in your board. If
that's too fast you can lower the speed to 1500MHz in the bios, or raise
it to 2400MHz with a little luck. And these are cheap.

http://cgi.ebay.com/AMD-Athlon-XP-2...ryZ44935QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

http://cgi.ebay.com/Athlon-XP-2100-...ryZ44935QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

I searched previous completed auctions, and it seems like athlon xp
2400s go anywhere from $60-90, while athlon t-bird 1400s go from
anywhere between $30-70. And I may go with a 1200, which should be a
little less.

Here's a question: If the 1.2 ghz t-birds come in both L1-disconnected
and L1-connected versions, and I just want to run it normally at 1.2
ghz in my KT7-RAID without overclocking, then does it matter if I get
the locked or unlocked version?

 

[Wes Newell]

You mean B (100MHz) and C (133Mhz). Yeah, I need the B.

Yep. Mark that down. I screwed up again.

I searched previous completed auctions, and it seems like athlon xp
2400s go anywhere from $60-90, while athlon t-bird 1400s go from
anywhere between $30-70. And I may go with a 1200, which should be a
little less.

That's why I listed the 2 cpu's above. They are Tbred B core unlocked
2100+ XP's and will run at a default of 2000MHz in your KT7-Raid board. No
mods required. And I think the highest bid on them at the time was about
$20. Just checked again and thye're only up to $27. I think they made both
a B & C 1200 too, so watch that too.

Here's a question: If the 1.2 ghz t-birds come in both L1-disconnected
and L1-connected versions, and I just want to run it normally at 1.2 ghz
in my KT7-RAID without overclocking, then does it matter if I get the
locked or unlocked version?

Closed L1's will allow you to change the the default multiplier using the
bios. There were no superlocked T-birds like the XP's after 0338. Now the
1400B tbird has a default multiplier of 14x, so trying to use it in the
KT7 with closed L1 bridges changes the whole multiplier scheme and that's
why it needs to be locked with open L1's.

 

[Guest]

Closed L1's will allow you to change the the default multiplier using the
bios. There were no superlocked T-birds like the XP's after 0338. Now the
1400B tbird has a default multiplier of 14x, so trying to use it in the
KT7 with closed L1 bridges changes the whole multiplier scheme and that's
why it needs to be locked with open L1's.

What about a 1.2 ghz tbird? It will run at 1.2 ghz in my board
regardless of the L1 bridges being locked or unlocked, right? Thanks.

 

[Wes Newell]

What about a 1.2 ghz tbird? It will run at 1.2 ghz in my board
regardless of the L1 bridges being locked or unlocked, right? Thanks.

A locked (L1's open) 1200B will run at 1200MHZ no matter what.

An Unlocked 1200B will run at whatever the bios is set to run it at.
600-1250MHz IIRC.