Since the Pentium4 1.6A is using the same 0.13 micron core
as much faster P4's, it should be obvious that there is
a lot of headroom with this processor.
The first thing we did when we plugged the CPU into the
motherboard was up the FSB to 133 MHz and the little CPU didn't disappoint us.
Instead of being a good overclocker and testing stability, we went back into the
BIOS and raised the FSB yet again, this time to 150 MHz. Boom, 2.4 GHz
right off the bat.
Upon entering windows we encountered a few stability
problems so we raised the core voltage to 1.65V and all the stability problems
went away. Keeping a 1.65V Vcore we next tried 160
MHz FSB and no problems there either.
We hit a very weird barrier at around 163 MHz though. At 2.61 GHz
(163MHzx16) the processor was absolutely stable but 1 MHz higher and the system
would only POST about 40% of the time. That wasn't the weird part though. When
the system did post and boot into
windows the system was again 100% stable!
This phenomenon happened all the way up to 170 MHz FSB which would
give us a CPU speed of 2.72 GHz. We're not really sure what was going on and if
you have any suggestions please tell me here. None the less, we were
very, very happy to see a 1 GHz overclock
Test System Specs:|
||Pentium 4 1.6A|
16x100 MHz = 1.6 GHz
MHz = 2.61 GHz
256MB KingMAX DDR333
||40 GB Maxtor
||Panasonic 48x CD-ROM CR-594-B
Panasonic 1.44MB Floppy Drive
||Antec 400W PSU |
||WindowsXP Build 2600|
Business Winstone 2001
SiSoft Sandra 2002
Quake III Arena
Please remember, the overclocked test
results has both the FSB as well as the CPU
SysMark2002 is more of an extension of SysMark2001
rather then a whole new benchmark. The applications used during testing have
been updated and most importantly for AMD users, the new SysMark2002 uses the
Windows Media Encoder 7.1 which supports the AthlonXP's SSE
speeds, the P4 1.6A performs online with what we expect however as we can see,
overclocking brings a huge performance boost!