Trying to upgrade a Dell XPS gen5 processor

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Rage's suggestion has a great deal of merit-and you will be upgrading at some stage.
However, if your happy to upgrade the Dell in the meantime in order to wait until prices come down and the kinks ironed out of the new chipsets then I most definitely wouldn't be spending $400 on a Dell power supply -that sounds around $385 too much in my opinion.
First step in replacing the Power supply would be seeing if you can fit an ATX standard PSU into the case: The ATX standard dimensions are 150mm width x 86mm high. Length is variable to an extent but budget for 200-250mm to allow for cables. Airflow is of paramount importance so if the case has limited vents then some cutting is going to be required to ensure the bottom/top mounted fan is aligned with a vent if the psu has such an intake fan. If the PSU has a rear fan (or passively cooled) only then you will have more options in how to get adequate airflow into the chassis if it doesn't already. You may also need to have to drill screwholes to secure the PSU. The ATX standard layout is here http://docs.google.com/viewer?a=v&q...V0f7b1&sig=AHIEtbSvw6oyypku1-qhj1ZFjxpsTlynCA

As for connectors: Your present PSU has connectors for 1 x 24pin Mobo 12V, 1 x 8pin EPS 12v, 1 x Floppy, 4 x SATA, 2 x Molex, 1 x 6 pin PCIe . The 650watt version is also pretty dire in the connection department as it has the same connections but adds a second 6 pin PCIe.
Any reasonable PSU in the 600watt range will have all these connectors and increased numbers of SATA and peripheral (Molex) and most likely 6+2pin PCIe for for graphics cards that feature 8pin power.
If the power supply would fit in the alloted space then get the best that you can afford as the PSU would likely outlast the system and you could use it as the core of a new build later.
If the PSU won't fit, then it comes down to your modding skills (hint: if you dont already own a rotary tool like a Dremel I wouldn't be trying it) or moving the system into an ATX standard chassis (which would most likely require drilling new motherboard standoff holes) or selling off the present system as Rage suggested and putting the proceeds into a new build.
 
hey all again...

i have finally come to the point where i need to decide what processor i want..!!
I have one last question tho.. i am a gamer (and do enjoy a smooth high detailed game) so i was wondering wht would be better to do... buy a processor that fits on my dell xps i955x (i asked this question earlier, and was told to look for Pentium D CPU) or would it be better to start all over and buy a new motherboard, CPU, ect. (Im planning to buy the intel q9400 2.66 Ghz quad core, or the 9550 2.83 GHz quad core) However money is a problem..

Is it necassary to start all over or would a Pentium D CPU do thing??
My current set up: Intel Pentium 4 650
i955x chipset
3GB RAM
Geforce GTS 250
460 psu
 
Going to Pentium D is a step up in performance
Going to Core 2 Quad is a BIG step up in performance.

Gaming at present is single-threaded (makes use of 1 core of a CPU), but that is changing rapidly. Newer titles are increasing utilising multiple threads/cores.
Moving to Core 2 Duo/Quad makes a more compelling choice if you plan on using the system for multimedia- video editing and conversion (one format to another), graphics (photo editing etc.), design...and browsing the net.
If you intend to buy new components then the pricing on P55 (andH55/H57/Q57) is likely to be competitive (see note 1) in terms of pricing and availability with LGA775 chipsets.
If you're planning to buy a mix of used and new then LGA775 becomes a better option (see note 2) as many people are now jumping ship to the new LGA1156 platform.
If funds are limited then Q8200/8400 are a good alternative to the Q9400/9450/9550, as are Q6600's (G0 stepping only- sSpec SLACR), or Core 2 Duo E8400/8500.
Mainboard of choice would be P45 -it's mature enough to have had the problems ironed out, yet young enough to incorporate a lot of the tech found in the P55/X58 ( all three share the same I/O hub controller-ICH 10). The chipset supports both DDR2 and DDR3 RAM and generally offers equal or better performance than it's predecessors (X48/P35/P965/975X).


Note 1: Before the AMD militia start up about leaving out their products as options...I don't care.
Note 2: I still don't care.
 
AMD's solutions work out cheaper overall IMO, and offer a better price\performance deal as well.

An AMD 770-based motherboard and an X3 720BE is quite cheap and offers far more performance for the same (or lower) price than an E8xxx\P45 setup.
 
AMD's solutions work out cheaper overall IMO, and offer a better price\performance deal as well.

An AMD 770-based motherboard and an X3 720BE is quite cheap and offers far more performance for the same (or lower) price than an E8xxx\P45 setup.

Really? Because according to a variety of 3dMark Vantage CPU benchmarks, they seem pretty evenly matched. As much of a fan of AMD as I am, I have to say that piping the X3 processors up to be better performance-wise like that is a bit misleading. The only processors that adequately defeated the E8500 and E8600 are the X4s.

http://www.tomshardware.com/charts/2009-desktop-cpu-charts/3DMark-Vantage-1.0.2-CPU,1398.html

It may very well be that in another task, an X3 might come out on top. But it seems that overall, they're well matched. Therefore I wouldn't say you get FAR better performance from either or. A motherboard can really only do so much for performance.
 
E8600 is usually priced horrendously and considering the performance gains to be had from a quad, the Q6600/Q6700/Q8400/Q9400 could be the way to go for foxtrot.
I'd probably steer clear of the Q9450/9550 unless you get a very good deal- you're only paying for an unlocked multiplier, and if that the drawcard then I would look at the cheaper option as they overclock (approximately) equally well and the larger L2 cache may not be worth the price premium.
 
Correction: I should've mentioned that apps that take advantage of all three cores will show better performance. Also, the unlocked multiplier on the 720BE allows for fantastic overclocks, not to mention the fact that it is possible to unlock the 4th core on it if you have a motherboard supporting ACC although admittely, YMMV on that.
 
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