[Solved] AMD Phenom x4 9650 Processor vs. Althlon 64 x2 5400

In May ;09 and on a strict budget, I purchased a HP Pavilion Slimline s3707c from Sam's Club for $599. I've been having problems with it, including overheating. Now, because of the problems and because it's less than a year old, I can take it back and either get a refund (not sure about the refund) or exchange (certain about that).

Specs on the s3707c are:

Bundle information
The s3707c-b desktop PC bundle (part number FQ579AA) includes:

* s3707c Desktop PC, part number FQ578AA

* w2007 20" lcd wide-screen monitor with integrated speakers

Hardware
Base processor
Athlon 64 X2 (B) 5400+ 2.8 GHz (65W)

*
800 MHz front side bus
*
Socket AM2

Chipset
GeForce 9100
Motherboard

*
Manufacturer: Pegatron
*
Motherboard Name: APX78-BN
*
HP/Compaq motherboard name: Nutmeg-GL6E

Power supply

*
160W

Memory
Component Attributes
Memory Installed 4 GB
Maximum allowed 4 GB* (2 x 2 GB)

*Actual available memory may be less
Speed supported PC2-6400 MB/sec
Type 240 pin, DDR2
Hard drive

*
500 GB SATA 3G (3.0 Gb/sec)
*
7200 rpm

With exchange in mind, I've been looking at the HP Pavilion p6157c, which I can get for $40 more or $639. Specs on it are:

Bundle information
The p6157c-b desktop PC bundle (part number NP254AA) includes:

* p6157c Desktop PC, part number NP253AA

* w2338h 23" LCD wide-screen HDMI monitor with integrated speakers

Hardware
Base processor
Phenom-9650 (A) 2.3 GHz (95W)

*
3600 MHz HyperTransport 3.0
*
Socket AM2+

Chipset
GeForce 9100
Motherboard

*
Manufacturer: Pegatron
*
Motherboard Name: M2N78-LA
*
HP/Compaq motherboard name: Violet-GL8E

Power supply

*
300W

Memory
Component Attributes
Memory Installed 7 GB
Maximum allowed 16 GB (4 x 4 GB) (64-bit OS)

4 GB* (4 x 1 GB) (32-bit OS)

*Actual available memory may be less
Speed supported PC2-6400 MB/sec
Type 240 pin, DDR2
Hard drive

*
750 GB SATA 3G (3.0 Gb/sec)
*
7200 rpm


From my perspective, it seems to me that I would be wise to go ahead and get the newer model, which also looks to me like it has a number of upgrades from my current computer (e.g., more RAM, bigger HD, expandable, extra slots, bigger monitor, etc.). I recognize, however, that my knowledge-base on how to compare computers is VERY limited, so would REALLY appreciate feedback on whether or not I'd be doing better if I trade mine in, vs. keep what I have.

Thanks in advance!

Ron in Anchorage, AK

P.S. Oh, I use for computer for the typical internet searching, documents, pictures, music, etc. - no games or demanding software.

Thanks to both of you for your responses!

Any time, thas't why we are here.