Oracle v.8 go slow on HP G5 Dual Core Processor

We have a really problem !!!
I have bayed a new computer HP DL380 G5
When i install Oracle 8 Server the database access is very slower.
The same application works fine on HP G2 G3 and G4
can anybody help me.
Thanks in advance
Isidre Tapias
[email protected]

The operating system is Windows 2003 sp1
with the same OS with hardware HP G3 and G4, Oracle v8 works fine.
It seems that the problem is G5 Dual Core Processors.
There are any fix o solution for this problem ??
best regards
Isidre

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====
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