# Why can't I find a 2.8 ghz socket 478 400mhz FSB Pentium 4 Processor? **URL:** \ **Category:** Factual Questions\ **Created:** [November 1, 2005, 7:15am UTC](https://boards.straightdope.com/t/why-cant-i-find-a-2-8-ghz-socket-478-400mhz-fsb-pentium-4-processor/328876 "2005-11-01T07:15:53Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![TLDRIDKJKLOLFTW](https://avatars.discourse-cdn.com/v4/letter/t/51bf81/32.png) [@TLDRIDKJKLOLFTW](https://boards.straightdope.com/u/TLDRIDKJKLOLFTW)\ **Post date:** [November 1, 2005, 7:15am UTC](https://boards.straightdope.com/t/why-cant-i-find-a-2-8-ghz-socket-478-400mhz-fsb-pentium-4-processor/328876/1 "2005-11-01T07:15:53Z")
I know that it’s the best processor that can fit in my old Dell’s motherboard, and it seems like it should be a reasonably cheap part to purchase now - but I can’t find the damned thing _anywhere_. Online retailers don’t have it, it’s not on ebay - what’s the deal? Was this chip super-limited or something? I think that it was the last P4 before they went to the 800mhz FSB - did they just not make many because the newer chips were coming? Where and how can I find one? ---
**Author:** ![CynicalGabe](https://avatars.discourse-cdn.com/v4/letter/c/3e96dc/32.png) [@CynicalGabe](https://boards.straightdope.com/u/CynicalGabe)\ **Post date:** [November 1, 2005, 7:54am UTC](https://boards.straightdope.com/t/why-cant-i-find-a-2-8-ghz-socket-478-400mhz-fsb-pentium-4-processor/328876/2 "2005-11-01T07:54:09Z")
I’ve had a few drinks, but are you sure you want a 400mhz FSB, and not an 800? Something about doubling with DDR RAM? Sorry, not much help [http://www.pricegrabber.com/search\_attrib.php/page\_id=209/vendors[]=INT/popup5[]=70:278/popup3[]=9:276/popup4[]=40:976](http://www.pricegrabber.com/search_attrib.php/page_id=209/vendors%5B%5D=INT/popup5%5B%5D=70:278/popup3%5B%5D=9:276/popup4%5B%5D=40:976) ---
**Author:** ![TLDRIDKJKLOLFTW](https://avatars.discourse-cdn.com/v4/letter/t/51bf81/32.png) [@TLDRIDKJKLOLFTW](https://boards.straightdope.com/u/TLDRIDKJKLOLFTW)\ **Post date:** [November 1, 2005, 8:42am UTC](https://boards.straightdope.com/t/why-cant-i-find-a-2-8-ghz-socket-478-400mhz-fsb-pentium-4-processor/328876/3 "2005-11-01T08:42:53Z")
Definitely need the 400mhz FSB; the MOBO uses RDram, not DDR. That one’s a 533…damn! ---
**Author:** ![Imasquare](https://avatars.discourse-cdn.com/v4/letter/i/5f9b8f/32.png) [@Imasquare](https://boards.straightdope.com/u/Imasquare)\ **Post date:** [November 1, 2005, 9:13am UTC](https://boards.straightdope.com/t/why-cant-i-find-a-2-8-ghz-socket-478-400mhz-fsb-pentium-4-processor/328876/4 "2005-11-01T09:13:20Z")
How about a 2.6 @ 400? [http://cgi.ebay.com/Intel-P4-2-6GHz-2-6-512-400-512K-400MHz-Northwood\_W0QQitemZ6817121016QQcategoryZ14293QQrdZ1QQcmdZViewItem](http://cgi.ebay.com/Intel-P4-2-6GHz-2-6-512-400-512K-400MHz-Northwood_W0QQitemZ6817121016QQcategoryZ14293QQrdZ1QQcmdZViewItem) ---
**Author:** ![Imasquare](https://avatars.discourse-cdn.com/v4/letter/i/5f9b8f/32.png) [@Imasquare](https://boards.straightdope.com/u/Imasquare)\ **Post date:** [November 1, 2005, 9:15am UTC](https://boards.straightdope.com/t/why-cant-i-find-a-2-8-ghz-socket-478-400mhz-fsb-pentium-4-processor/328876/5 "2005-11-01T09:15:25Z")
And here’s a 2.8: [http://cgi.ebay.com/Intel-Pentium-4-2-80GHz-400MHz-512K-478-Pin-CPU\_W0QQitemZ6816480650QQcategoryZ14293QQrdZ1QQcmdZViewItem](http://cgi.ebay.com/Intel-Pentium-4-2-80GHz-400MHz-512K-478-Pin-CPU_W0QQitemZ6816480650QQcategoryZ14293QQrdZ1QQcmdZViewItem) ---
**Author:** ![chaoticbear](https://avatars.discourse-cdn.com/v4/letter/c/f07891/32.png) [@chaoticbear](https://boards.straightdope.com/u/chaoticbear)\ **Post date:** [November 1, 2005, 4:24pm UTC](https://boards.straightdope.com/t/why-cant-i-find-a-2-8-ghz-socket-478-400mhz-fsb-pentium-4-processor/328876/6 "2005-11-01T16:24:43Z")
Hmm, I couldn’t even find one on the egg or pricegrabber. This is a very mysterious processor indeed. ---
**Author:** ![alterego](https://avatars.discourse-cdn.com/v4/letter/a/6bbea6/32.png) [@alterego](https://boards.straightdope.com/u/alterego)\ **Post date:** [November 1, 2005, 8:28pm UTC](https://boards.straightdope.com/t/why-cant-i-find-a-2-8-ghz-socket-478-400mhz-fsb-pentium-4-processor/328876/7 "2005-11-01T20:28:16Z")
$129 @ MemoryLabs: [link](http://store.yahoo.com/tonyh/ince2474012c.html)