Pentium 4 CPU 3.0 GHz Socket 478 800FSB 1M L2 cache, OEM

This was cheap enough to experiment with. This CPU replaced an older Celeron CPU. I did not see any difference in use. After the machine is on for about 5 hours, it locks up and "system is peaking" or something like that is repeated over until I turn the machine off using the off button. While the machine is locked , the only way to turn it off is with the off button.

Never used it - I got wrong CPUSo can only assume goodI was going for Speed but I didn't know I needed a 775 LGA

the fsb was 800 and i wish i would have read it it before because my motherboard takes 533 lol so i am keeping it for another system. but the shipping was great and fast.!

THis item worked advertized, the seller was very helpful when I thought that it may have a problem. It turned out to be an improper installation caused problem.

It's quite amazing how far the Pentium 4 has come in the last three years. I still remember a time when the original Williamette Socket 423 Pentium 4 1.5 GHz processor made its first debut. Despite all the "large numbers", performance of the CPU was actually pretty absymal when compared to AMD's solutions at the time.My oh my how times have changed. We're up past 3GHz, a number which is pretty phenomenal considering the first computer many of us used in the 486 days was clocked at just 33MHz. In any event, a history of the Intel processor is not what we're about to embark upon. Instead we are going to be testing out the newest chip, the hottest thing since sliced bread if you listen to Intel in fact - enter the 800MHz FSB Intel Pentium 4 3GHz Northwood Socket 478 processor.pentium 4's were originally clocked at 1.5 GHz with 256KB L2 cache and running on a 400 MHz FSB, now the top of the line CPU from the men in blue runs at 3 GHz and comes packing 512KB of L2 cache. Based on the same Northwood core that was released way back in January of 2002, the P4 3.0C (as it is known in the geek circles) is a force to be reckoned with. While the AthlonXP3200+ gives the P4 3.0C a good run for its money, the P4 is slightly faster in the end as you'll see.Other then running at a higher FSB and supporting HyperThreading (which is disabled on some slower Northwood P4's), there are no physical or architectural differences between the P4 3.0C or older Northwood based Pentium 4's.

Purchased this for a friend's old computer as part of a cheap upgrade, replacing an old celeron CPU. Installation went smoothly and the new P4 CPU seems to be running just fine. The new processor, along with added memory and an upgraded video card have noticeably improved the performance for the machine. The item ordered was well priced, arrived in a timely fashion, and was well packaged to prevent damage. Overall, I am quite pleased with the purchase.

EXCELLENT PRODUCT ....AMAZON ROCKS

My 2.8 Presscott will over clock to 3.8 this will not go over 3.2 but it is stable. Intel Pentium 4 3GHz 800MHz 1MB Socket 478 CPU the OEM does better Processor - 1 x Intel Pentium 4 3 GHz ( 800 MHz ) - Socket 478 - L2 1 MB - OEM