Does ASUS P4B266 have AGP/PCI lock?

xenolith

Golden Member
Aug 3, 2000
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Since the P4B266 (i845D) and P4B533 (i845E) are practically the same board accept superfluous features (IMO), I was thinking of saving money and just get the P4B266 and try to overclock a P4 1.6A to 2.66ghz @ 166 FSB. But I notice the P4B533 has a very useful AGP/PCI freq setting in the BIOS that keeps them at a very safe 66.6/33.3mhz no matter what the CPU freq. If the P4B266 has a BIOS update that provides this same setting or if it has a "hidden" AGP/PCI lock, I'll stick to my plans.

Edit: Also, does the P4B266 have a AGP/PCI 2.5:5 divider? that would solve this issue too.
 

THUGSROOK

Elite Member
Feb 3, 2001
11,847
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yes.
its called turbo1 / turbo2 mode.

turbo1 locks 70agp/35pci
turbo2 locks 80agp/40pci
 

oldfart

Lifer
Dec 2, 1999
10,207
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Between those two, I'd go with the 533. The USB ports dont work on the 266 if you are overclocking, and cas timings are locked at slowest settings when above 133 FSB also. The 533 also has better Vcore range. The adjustable PCI/AGP is also a nice improvement over the turbo dividers. The 533-E is pretty nice except for the lack of memory ratio above 132 FSB. A much better board than the P4B266 IMHO.