Nov 13 2008
My Old Dell XPS Gen5 Gets A CPU Upgrade
My Dell XPS Gen5 computer was high-end stuff when I bought it in 2005. I updated the video card and memory last year at about this time, thinking that these would be the last upgrades that I would be able to make before buying a new computer. I was wrong though, since it turns out that my Intel 955X chipset motherboard was capable of handling a multi-core Intel processor, as long as it has the latest bios (A04). I wasn’t sure if the XPS Gen5 could handle a processor greater than a Pentium 4 until just recently, but I was happy for the chance to prolong the life of my computer.

I didn’t see the need to upgrade to another Pentium 4 chip, since that would only increase the speed to 3.6 Ghz at the most. However, the Intel 955X chipset in the XPS Gen5 can handle any of the Pentium D 900 series processors as well. The Pentium D is essentially like two Pentium 4 chips strapped together. I settled on the Pentium D 940, since it is as fast as my old processor (3.2 Ghz). Also, the 940 is cheaper and easier to find than the 950 (3.4 Ghz) or the 960 (3.6 Ghz). There is an 800 series for the Pentium D line as well, but the front side bus isn’t split amongst the two processor cores on these earlier releases.
The downside is that my machine won’t necessarily be any faster, since the processor still runs at 3.2 Ghz. The difference is that there are now two processors running at 3.2 Ghz, and they run at the same time. So multiple programs running under Windows will run equally fast, without having to share processor time. The new processor also has twice the front side cache (2×2 MB) as the old one. Single programs, like my very needy video games, will run at relatively the same speed, unless they are optimized to run on multi-core processors (I’m thinking Crysis right now!).
I got very lucky and found a brand-new boxed Pentium D 940 on eBay for $80. Other boxed 940s were going for at least twice that amount online. I had seen some OEM processors (just the chip, no fan or heat sink) going for only $75 before shipping, so I got a pretty good deal. When I opened up the XPS Gen5 though, I found that the fan and heat sink that came with the processor would not fit on my motherboard. I would have to use the old heat sink, a monster cooling tower with two fans encased in a shroud around it (arguably better than the one that Intel sent).

The problem was that I didn’t have any thermal gel compound. The new heat sink had some on the bottom though, all ready to smash up against the processor. I took out my pocket knife and scraped off the compound from the heat sink, then spread it the best that I could on the business end of the old heat sink. It looked like hell, but I’m hoping that it evens out a bit once the processor heats up. I’ll have to keep an eye on the temperature for the next few days (especially once I start playing games on it) to make sure that it doesn’t overheat. With luck, this computer should last me another couple of years!
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