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Fast chip on a slow bus

C

ceBlaze

Junior Member
I have a VIA KT400 mobo, and I want to max out the processor. It's not a huge feat, the specs claim that it can take "Athlon XP" processors. here's the thing: the specs say I have a 333Mhz FSB, max. to stay in line with this, i would get a 3000+ 333Mhz, but the 3200+ 400Mhz chip is damn near the same price.

So here is the real question: if I drop in the 3200+, will it run at "3.2Ghz" (or whatever it really is), but clock down to 333Mhz? Is it possible to overclock my FSB? I have 400Mhz memory (DDR3200), so i would love to have everything running at the same speed :-D

PS: i have never overclocked. I know the basic theory, but i bought this board two years ago because it was supposed to have all kinds of overclock abilities, and i was going to start learning to overclock 😱
 
The 3200+ is 2.2Ghz. If you motherboard can overclock the FSB to 200Mhz then in theory you could run the 3200+ at 200Mhz FSB. If not who knows what will happen. It could just run it underclocked or it may not boot. You'd probably be better off going with the 3000+ and just overclocking it a little to get to 3200+.
 
if you mobo supports multiplier adjustment --- then get a mobile xp cpu and then change the multiplier to as high as it will overclock -- should still run 2.2+ghz easily on 1.6v or so
 
maybe i'm not getting this, but why is everyone pushing the XP-M? I tend to see it via the old car addage "there's no replacement for displacement". Does the low voltage requirements allow it to be turbo-charged to hell and back? My thought was even if the 3200+ ran slow, it should be able to be "overclocked" a great deal, since it was actually made for more than it was being asked to do. BTW, I don't see a large money difference, since I found the 3000+ for $95, and the 3200+ for $115, so why would I jump down to 2600+?

i have the same motherboard as Sangyup, the GA-7VAX. I think it supports multiplier adjustments, it seems to be locked right now, but I think that has to do with my current CPU (1700+, there's some kind of pencil trick i havn't attempted yet)

I was thinking, if I place in the 3200+ at 333, that's 5/6 the FSB, would I end up with 5/6 the Ghz? so about 2660+
 
hey Sangyup, do you use EasyTune for your mobo? I've been poking around with it, and I see settings for system bus, but I don't know it that's FSB only, or includes it or what. If it is my FSB, it's running extremely slow
 
The XP-Ms can run at similar speeds to the faster rated models but at a lower voltage. That means you can increase the voltage on the XP-M and overclock it higher than the desktop chips. For example, the 2600+ XP-M runs 2.0GHz on 1.45V, but the 3200+ desktop XP needs 1.65V to run 2.2GHz. The worst you can get is a 2.2GHz XP-M for less than the cost of the 3200+.
 
I tried to put a 533mhz FSB chip, on a motherboard that supported 400mhz FSB, but could overclock to 533mhz FSB..that was the end of that motherboard, and the power supply too..
 
so price aside, would an Athlon XP-M 3000+ 266Mhz be able to be overclocked further than an Athlon XP 3000+ 333Mhz?
 
The Athlon XP-M 2600+ is 1.45v stock and the XP-M 3000+ is 1.65v stock. Just get the 2600+. I was around before the Athlon 64 era and from what people have experienced, the 45w Athlon XP-M 2600+ is the best chip to get. If you have good cooling and want to save a few bucks, the 35W XP-M 2400+ is good too.

Also, you can't compare clock speed to a car's displacement. The xp-m 2600+ and the xp-3000 are both Barton cores. They're essentially the same thing except some chips come out better than others. Because the 2600+ does what it does with 12% less voltage, it actually tends to be higher quality than the 3200+ when you increase the voltage via the motherboard BIOS.

Oh and BTW, when it comes to Athlon XPs, you will get an unlocked chip guaranteed if you go the mobile CPU route.
 
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