I bought a retail Barton 2500+, a Gigabyte KT600, and a 512 stick of PC3200 at a computer fair for cheap last summer. I wish I had gone with the NForce2 now, but that's hindsight. In order for my PCI/AGP to stay at 33/66, I had to wire trick the socket into thinking the the 166 MHz FSB chip is a 200 MHz FSB chip. FSB_SENSE is controlled by the L12 bridges or by pins on the bottom of the CPU.
After wire tricking the socket into thinking it was a 200 MHz FSB part, the computer would sometimes post as a 3200+, and even get into the BIOS, but it would not boot windows at any voltage. I had to switch my FSB to 100 MHz using a jumper on the motherboard to tweak the BIOS (CPU was running at 1100 MHz, LOL) and then switch it back to 200 MHz to test. It just would not work at 3200+ at any voltage and relaxed memory timings.
This chip just would not run at 2.2 GHz and since there is no multiplier selection, I had no undo the wire trick. The computer is now at 183*11 for 2.01 GHz. Not every 2500+ Barton will make it to 3200+.
After wire tricking the socket into thinking it was a 200 MHz FSB part, the computer would sometimes post as a 3200+, and even get into the BIOS, but it would not boot windows at any voltage. I had to switch my FSB to 100 MHz using a jumper on the motherboard to tweak the BIOS (CPU was running at 1100 MHz, LOL) and then switch it back to 200 MHz to test. It just would not work at 3200+ at any voltage and relaxed memory timings.
This chip just would not run at 2.2 GHz and since there is no multiplier selection, I had no undo the wire trick. The computer is now at 183*11 for 2.01 GHz. Not every 2500+ Barton will make it to 3200+.