I recently purchased a gig stick of PC3200 ram, my current system is clocked at 1830 GHZ 166/33 FSB so 333 ram speed. I want to increase my FSB to 200/40, for my new stick. I have an unlocked cpu so I can change my multiplier to what ever I want. Now when ever I increase my FSB this much, programs start to crash and windows begins to lose important data. I have 3 case fans so my CPU idles at 30 and full load is max 48-50. My HDD is a Seagate 7800 barracuda 120g. Now, is it possible to get my FSB that high without losing system stability?

Thanks.

Increase the Dimm voltage and see if that solves your problem. but do it in small amounts if you can do that in your bios.

AMD64 3800x2 @2.7ghz
"phase change Cooling"
Nvidia 7800GT
Epox 9npa+Ultra
1Gig pc4800

If you've got the XP-M 2500+ (Barton core), running the CPU as a 3200+ is as simple as ramping the FSB from 166MHz (333 FSB) to 200MHz (400 FSB).

Usually you don't even need to touch the Vcore to attain this, but having PC3200 is necessary, you may also try to relax the RAM timings a little.

But altogether, it should be a walk in the park for the 2500+.

There is only one satisfying way to boot a computer.

Just to add...there is no way to unlock a Barton. It's either unlocked or it's not. So you either have a mobile CPU (as Sabertooth is suggesting), or you have a very early model of the 2500+ Desktop CPU...OR your CPU isn't unlocked at all & each time you change the multi setting, it's just defaulting back to 11x.

The ASUS A7V8X-X is based on the KT400 & although it supports PC3200 RAM, it doesn't offically support 200MHz/400FSB. Also, VIA based systems usually don't have the ability to lock the PCI/AGP, so if the FSB/PCI option is 200MHz/40MHz, the PCI bus will be too far outta spec & you're bound to run into stability problems. Your max safe FSB setting is 187.5MHz/375FSB.

Hellz Yea!

Well I would really like my ram to run in sync with my processor, and yes my CPU is unlocked, I can change the multiplier and it will boot up and display my ghz to what I set it at (in windows). So am I outta luck then?

Oh and one other thing, if I was to add some of my older sticks of PC2700 ram back in my PC, would they work with my PC3200 since the fsb is set to 333 mhz ? And by increasing the FSB to 375 would that allow my RAM to run slightly faster? thx

It's your system...you're the one who has to decide if the risk is worth the slight performance gain.

VIA chipsets offer good performance, but for whatever reason, the option to lock the PCI/AGP at their defaults (33/66MHz) usually isn't included as one of the BIOS settings. That means if your raise the FSB, you raise the PCI/AGP. 37.5MHz is generally considered the safe max...any higher than that & you risk problems with anything that uses the PCI bus. Since IDE devices use the PCI bus, the biggest risk is data corruption on your HDD...but it can also affect burning, sound, video, etc.

If your BIOS doesn't have the option to run purely in SYNC (meaning if you set the FSB at 175MHz, the RAM will also run at 175MHz), & your RAM choices are only 266, 333, 400, you have no choice but to run ASYNC.

I suggest you set the RAM speed to 400 & raise the FSB as high as possible without letting the PCI exceed 38MHz (probably about 188MHz). Then if you want more speed out of your CPU, you can play with the multiplier & CPU voltage

Hellz Yea!

remember that you risk corrupting the windows install running the pci bus far out of spec if you didnt know so if you're on windows xp keep system restore switched on.

Abit NF7-S 2.0
XP2500-M @ 11.5 x 204=2353MHz
Tt Volcano 7+
512MB DDR 1x2700, 1x3200
120GB Maxtor D9 8mb cache
GeForce4 Ti4200 @ 300/600

The other problem is, under my RAM speed settings I only have 333 mhz or Auto, by raising the FSB to 200/40 only then does the RAM option for 400 mhz become availible. Any tips on this?

Its unlikely it'll run at 200FSB without a lot of problems if it even POSTs as the PCI/AGP bus will be way out of spec, even if the chipset can run 200FSB the IDE and PCI cards certainly won't like 40MHz..if it does POST and there are no problems, I'd be very suprised.

if there isn't an option to run the FSB:MEM at 1:1 ratio - in sync, then you may as well leave it on Auto, raise the FSB over 166 and use CPU-Z or something to check if the memory is running in sync with the FSB..I'm guessing that the auto setting will be 166 and not 1:1 with FSB.

Abit NF7-S 2.0
XP2500-M @ 11.5 x 204=2353MHz
Tt Volcano 7+
512MB DDR 1x2700, 1x3200
120GB Maxtor D9 8mb cache
GeForce4 Ti4200 @ 300/600