Alright, I just created a complete build for you (everything included, monitor, mouse, keyboard, etc) for $552.91 , and $572.91 with the 19" monitor (before shipping). This build has some good potential for upgrades, too. I love creating these budget builds, it really gets me passionate when it comes to my frugality. Here it is piece by piece and why I chose it.
EACH BUILD HAS A HYPERLINK LEADING TO NEWEGG.COM, A STORE I HIGHLY RECOMMEND FOR PURCHASING THESE PARTS. BEST PRICES, PERIOD.
The Motherboard/Case/Power Supply -
MSI MBOX 945GM3-F Intel Socket T(LGA775) Intel Core 2 Duo / Pentium D / Pentium 4 Intel 945G 2 x 240Pin Intel GMA 950 Barebone - Retail ($98.99)
http://www.newegg.com/Product/Product.aspx?Item=N82E16856167008
In order to simplify this process, I decided on a barebones package which includes the motherboard, power supply, and case all in one purchase of ~$100. It was difficult to find one with all modern equipment, but this one has everything practically standard for modern PC's, like 4 SATAII ports, 1000MBPS Lan Speed, and one PCI Express x16 slot. It supports Pentium D's as well as Core 2 Duo's, this is important as you'll find out why in the processor's suggestion.
The only thing I could really recommend you add onto this case, is a second fan for the front, I believe there is a spot for one in front of the 3.5" hard-drive bays (probably a 90mm size). It's an easy $7 to protect your investment, and save your hardware (
make sure the front brings air in and the back pushes air out!).
The Processor -
Intel Pentium D 925 Presler 3.0GHz 2 x 2MB L2 Cache LGA 775 Processor - Retail ($99.99)
http://www.newegg.com/Product/Product.aspx?Item=N82E16819116254
In order to save much $$$ in this build, I can't really recommend buying a Core 2 Duo, but this Pentium D will keep you in the family. It's not crazy on performance or anything, but it's the best price/performance ratio that I can recommend that meets your budget. Besides, down the road you could still upgrade to a Core 2 Duo if you'd like with the same motherboard from the barebones package. Did I mention it's dual-core?
The Memory/RAM -
OCZ S.O.E 1GB 240-Pin DDR2 SDRAM DDR2 667 (PC2 5400) Desktop Memory - Retail ($25.99)
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227114
Your motherboard supports DDR2 as high as 667 for your memory. This single 1GB stick is only $25.99, and it'll allow you to drop in another 1GB stick down the road (meaning you'll have 2GB's total, the best number so far for memory).
The Video Card -
EVGA 256-P2-N615-TX GeForce 7600GT 256MB 128-bit GDDR3 PCI Express x16 SLI Supported Video Card - Retail Customer Choice Award ($89.99, $10 rebate not included!)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130062
This is, to me, the standard of video cards for gaming. The affordable 7600GT doesn't stop impressing me with how well it'll handle your 2 year old games, and even some modern games on low settings (you can play Oblivion really well on it, for example).
I highly recommend this card if you're doing a budget gaming build, I'm using this same card right now!
The DVD Burner -
SAMSUNG Black 20X DVD+R 8X DVD+RW 12X DVD+R DL 20X DVD-R 6X DVD-RW 12X DVD-RAM 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM 2MB Cache PATA 20X DVD±R DVD Burner - OEM ($27.99)
http://www.newegg.com/Product/Product.aspx?Item=N82E16827151151
A standard DVD burner with great speeds, and a SATAII connection. I can't suggest a CD burner if you want this machine to last with a few upgrades.
The Hard Drive -
Western Digital Caviar SE WD800JD 80GB 7200 RPM 8MB Cache SATA 3.0Gb/s Hard Drive - OEM ($42.99)
http://www.newegg.com/Product/Product.aspx?Item=N82E16822135106
A standard SATAII hard drive, with 80GB. Learn to spend those bytes wisely, but you can always add a second, larger SATAII hard drive as a relatively cheap upgrade (~$75-$80) later down the road; you're motherboard has 4 SATAII ports, and only two are taken up by the DVD burner and first hard drive.
The Input Devices/Keyboard and Mouse -
LITE-ON SK-1788/BS 2-Tone 104 Normal Keys PS/2 Wired Standard Keyboard - Retail ($6.99)
http://www.newegg.com/Product/Product.aspx?Item=N82E16823107120
Microsoft N71-00007S Black 3 Buttons 1 x Wheel USB Wired Optical Wheel Mouse - OEM ($9.99)
http://www.newegg.com/Product/Product.aspx?Item=N82E16826105026
A cheap PS/2 keyboard for $6.99, performs well enough for the task.
A better (optical, not wheel) mouse for $9.99 that uses a USB port, has only 3 buttons though but it has the wheel.
The Monitor -
Now, this was the difficult part for me. I wanted to recommend a 19" widescreen and nothing less, but the cost got a little bit difficult. You can make the choice to spend the $20 more to get the 19" and you won't be dissapointed, but if not I still have a 17" widescreen I can recommend.
Hanns·G JW-199DPB Black 19" 5ms DVI Widescreen LCD Monitor 300 cd/m2 700:1 Built in Speakers - Retail ($169.99)
http://www.newegg.com/Product/Product.aspx?Item=N82E16824254001
Hanns·G HW-173DBB Black 17" 8ms DVI Widescreen LCD Monitor 250 cd/m2 500:1 - Retail ($149.99)
http://www.newegg.com/Product/Product.aspx?Item=N82E16824254018
I highly suggest spending the small, extra amount of money to get the 5ms response of the 19" (
which is extremely important for gaming), plus you won't feel like it's necessary to upgrade down the road when you have a good standard 19" with you at the time. The 19", I
highly recommend.
These monitors do have two, small speakers built in, which is the one thing I have not included in your build. If you were interested in speakers start looking at 2.1 systems (which are two normal speakers and a subwoofer), they make a decent experience out of anything. However, I suggest you look into a pair of headhpones you are comfortable with instead of the system, for the budget reason.
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Okay, that's it. Anyone agree/disagree with me? Let's help this one out.