I put together my first computer a couple weeks ago and I've got an overclocking question...
It's a mobile Barton 2500+ on a DFI Infinity Ultra with 1gb of Mushkin Level 1 PC3200 DDR400 RAM running in dual channel mode.
After making sure the proc and memory were prime stable at the default core speed (200x9), I started to test my overclock options; 200x10-13.5. With the 200mhz fsb, it's Prime stable through to 2.6ghz (3.5 requires 1.9V which I'm not comfortable with). Having Primed it at 200 I started pressing the fsb overclock. I knocked it up to 230 and increased the DIMM voltage to 2.9V and ran memtest (I figured the first thing that would have a problem with this 60mhz oc would be the RAM). Sure enough, I got errors in memtest so I bumped it down to 225 and then to 220 at which point the RAM passed four rounds of memtest without error. And yet at 220x11 it failed Prime 95. So although the memory ran error free and the rig had been Prime stable at approximately the same core speed (2420mhz as opposed to 2400) with the same core voltage, it failed Prime. Why? Do I need to up the vcore even though the core speed stayed the same? Is the processor limiting the fsb overclock? That seems reasonable to me since the mobile defaults to 266, but I've only ever read about the RAM limiting the fsb.
So in fewere words, my question is: does increasing the fsb while simultaneously lowering the multiplier and maintaining approximately the same core speed also require an increase in the vcore?
To put it again another way, should 220x10 require more core voltage than 200x11?
Thanks for your help.
It's a mobile Barton 2500+ on a DFI Infinity Ultra with 1gb of Mushkin Level 1 PC3200 DDR400 RAM running in dual channel mode.
After making sure the proc and memory were prime stable at the default core speed (200x9), I started to test my overclock options; 200x10-13.5. With the 200mhz fsb, it's Prime stable through to 2.6ghz (3.5 requires 1.9V which I'm not comfortable with). Having Primed it at 200 I started pressing the fsb overclock. I knocked it up to 230 and increased the DIMM voltage to 2.9V and ran memtest (I figured the first thing that would have a problem with this 60mhz oc would be the RAM). Sure enough, I got errors in memtest so I bumped it down to 225 and then to 220 at which point the RAM passed four rounds of memtest without error. And yet at 220x11 it failed Prime 95. So although the memory ran error free and the rig had been Prime stable at approximately the same core speed (2420mhz as opposed to 2400) with the same core voltage, it failed Prime. Why? Do I need to up the vcore even though the core speed stayed the same? Is the processor limiting the fsb overclock? That seems reasonable to me since the mobile defaults to 266, but I've only ever read about the RAM limiting the fsb.
So in fewere words, my question is: does increasing the fsb while simultaneously lowering the multiplier and maintaining approximately the same core speed also require an increase in the vcore?
To put it again another way, should 220x10 require more core voltage than 200x11?
Thanks for your help.
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