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Hey guys, been lurking here the last couple weeks. some of you may know me from ocforums.com but there seems to be a lot of info here about the 720 so I figured it would be a good place to be.
anyways I have a Phenom II 720 BE 0851 stepping. I have had decent luck with it so far. 3.7 was my highest stable clock, but would fail prime after about 1HR, regardless of voltage etc.
Biostar ta790gx a2+ mobo with sinked mosfets
xfx 9800GT with a zalman vf1000 cooler overclocked to 710core 1050 memory
4gigs of gskill ddr2800
1TB hitachi hard drive
quad booting windows xp 32, 64, vista 32, 64
Last night I started playing around with enabling the 4th core. To my surpise, it did not affect my stability at 3.6Ghz so I let it run prime, it passed for over an hour. The settings were 200x18 for 3600 MHz, 1.5125V core 1600 HT link (the highest my mobo will let me go) and a 2000Mhz NB at 1.3 volts. Today I upped the NB to 2400 and it failed prime after 1 hour.
I am debating on what to do next. Should I lower my NB back to 2000 and be happy with the stability? Try for 2200? I heard a rumor that there was a strange peformance hit around the 2200 NB speed mark. Not sure why.
Couple annoying things... core temp no longer works. Either reads 0 or a really low number, however this hardware monitor program seems to still be able to read the temperature, im not sure how accurate it is, but it seems to be about 4C higher than what core temp read with 3 cores enabled, so im guessing its spot on with core temp. I may consider getting some beefier cooling if this 4th core proves to be worthy.
Here is a screenshot of my results. Any input is appreciated!
anyways I have a Phenom II 720 BE 0851 stepping. I have had decent luck with it so far. 3.7 was my highest stable clock, but would fail prime after about 1HR, regardless of voltage etc.
Biostar ta790gx a2+ mobo with sinked mosfets
xfx 9800GT with a zalman vf1000 cooler overclocked to 710core 1050 memory
4gigs of gskill ddr2800
1TB hitachi hard drive
quad booting windows xp 32, 64, vista 32, 64
Last night I started playing around with enabling the 4th core. To my surpise, it did not affect my stability at 3.6Ghz so I let it run prime, it passed for over an hour. The settings were 200x18 for 3600 MHz, 1.5125V core 1600 HT link (the highest my mobo will let me go) and a 2000Mhz NB at 1.3 volts. Today I upped the NB to 2400 and it failed prime after 1 hour.
I am debating on what to do next. Should I lower my NB back to 2000 and be happy with the stability? Try for 2200? I heard a rumor that there was a strange peformance hit around the 2200 NB speed mark. Not sure why.
Couple annoying things... core temp no longer works. Either reads 0 or a really low number, however this hardware monitor program seems to still be able to read the temperature, im not sure how accurate it is, but it seems to be about 4C higher than what core temp read with 3 cores enabled, so im guessing its spot on with core temp. I may consider getting some beefier cooling if this 4th core proves to be worthy.
Here is a screenshot of my results. Any input is appreciated!
