I am sooooo mad! Heres the story: I have been using my Sony Vaio for about 2 years and it has been working great! Specs Before: 2.0 Ghz 133.3 Mhz FSB Old Motherboard One day it just wouldnt boot. When i pressed the ON button, nothing happened! So i took it to Best Buy Service Center and had them take a look. They told me that there was something wrong with either my MB, or my CPU. So i left my comp there for about 2 weeks, then went back. They said they had fixed the problem. They gave me a new MB and a new CPU. The CPU was 2.4 Ghz! I was so happy that i had a 2.4 GHZ CPU instead of a 2.0 GHZ one. Now i went home and found out that although the CPU was able to run at 2.4 GHZ, it couldnt! Because the MB didnt support a higher FSB than 100. So now im stuck at 1.8 GHZ! After doing the math, i found out that if my FSB was 133.3, (WHICH IT WAS BEFORE THE PROBLEM OCCURED), then i would have been running at 2.4 GHZ rather then 1.8 GHZ! I have an 18.0 multiplyer. Do the math (18 x 133.3 = about 2.4 GHZ!) I was so pissed that now my computer is running slower than it was before! What kind of piece of crap motherboard doesnt support a FSB higher than 100! I cant believe they would put such a crappy motherboard and tell me that it will run at 2.4 GHZ when it only runs at 1.8 GHZ ! ! ! Although all of this was done free or charge (because of 3 year warrantly plan), i still dont like the fact that they did this! What am i supposed to do now!? Go back and tell them to replace my MB with a better one??? ASUS P4S266VX INTEL P4 1.8GHZ 100MHZ FSB 512MB DDR-SDRAM 128MB RADEON 9600 XT 55GB SAMSUNG SV6003H

I think its your right to get what the warrantly plan "promises". Either a replacement for your mobo (FSB= 133mgz) or something better. Now I don't know what they were tring to pull off, but you should get what you paid for and that is the same make and model with the exact same features as the one you brought in to replace. You sound like a smart guy to me and computer literate enough to know when you have been taken advandage of (if infact that is the case here). So either call them up and arrange an oppenment, or go there and give them a peice of your mind telling them what you told us. Again there should not be any charge, because they are the ones who messed up. Tell them that you would like a replacement for your old mobo and not a cheap-o- one that does not even let you run Your processor to its full ability. We only buy hardware so we can run software on it.

its probly not the motherboard, just a setting that needs to be changed in the bios. a motherboard that only had 100mhz fsb would not be in existance for your cpu, because a you need 100mhz ram, and that was soo 1996. so the motherboards now either use pc133 ram or ddr. so its just the bios that neeeds to be changed. when i was working on a motherboard, the speed wasnt right for the cpu, so all i did was fix it in the bios. and this is what you need to do. get into the bios on a reboot, and then go into chipset features setup , or find the thing called FSB frequency . bring the FSB up to 133 . its probly just the stupid idiots at bestbuy that dont know squat about what they are doing.

"Now i went home and found out that although the CPU was able to run at 2.4 GHZ, it couldnt! Because the MB didnt support a higher FSB than 100" Mr.x is correct your mobo should support a 133 FSB. If for some weird reson it does not (highly unlikly) go to the makers of your MB's site and download the newest bios update this should fix any confusion. We only buy hardware so we can run software on it.

I agree with the above posters. The slowest currentIntel MBs have a quad pumped 133 bus for 533FSB. Should be a BIOS setting or a jumper.

My MB is listed on the bottom part of my main post... I cant change the FSB with BIOS. The BIOS on my MB is very limited and i cant really change anything with it. I have tried looking up my MB model on the ASUS website, but its not there. So i dont really know what to do since i cant change it. ASUS P4S266VX INTEL P4 1.8GHZ 100MHZ FSB 512MB DDR-SDRAM 128MB RADEON 9600 XT 55GB SAMSUNG SV6003H

It looks like that MB was manufactured by Asus for Sony. That is the correct MB. I found a site that lists all the Sony MBs and matches them to the Sony models. It appears to me that you may have the wrong BIOS file installed. I suggest you take it up with the warranty folks. I think the info below points to the file that should be installed. Hope this helps solve your problem. If it isn't a BIOS problem make them explain what is going on. PCV-RX755 #SOA003XDFL.exe (vad1003.bin) 05/21/2002-SiS650-P4S266VX BIOS Revision 1003 (Asus)