There is currently a price war between AMD and Intel. Intel's latest
product line is positioned at the high to mid-high end of the market.
AMD is occupying the low to mid range.
Charts - so you know what you're getting:
http://www23.tomshardware.com/cpu.html
AMD Athlon 64 4000+ single core San Diego 2.4GHz 1MB L2 Socket 939 OEM $80
http://www.newegg.com/Product/Product.asp?Item=N82E16819103528
ASUS A8N5X Socket 939 NVIDIA nForce4 ATX AMD Motherboard $73
http://www.newegg.com/Product/Product.asp?Item=N82E16813131569
CORSAIR ValueSelect 1GB (2 x 512MB) 184-Pin DDR400 (PC 3200) $100
http://www.newegg.com/Product/Product.asp?Item=N82E16820145480
Seagate hard drive - IDE (no surprises) $44
http://www.newegg.com/Product/Product.asp?Item=N82E16822148095
NEC 16X DVD±R DVD Burner Black IDE/ATAPI Model ND-3550A - OEM $30
http://www.newegg.com/Product/Product.asp?Item=N82E16827152058
Cooler (since processor is OEM and heatsink/fan doesn't come with CPU)
Normally I'd recommend a Zalman 7000B AlCu, but not for a kid's PC
This one is compact and easy to install. Fan appears replaceable.
Thermaltake CL-P0200 Silent 939 K8 - AMD K8 solution w/ Heatpipe $30
http://www.newegg.com/Product/Product.asp?Item=N82E16835106068
http://www.pro-clockers.com/reviews.php?id=65&page=3
Thermal paste (Ceramique) $5
http://www.newegg.com/Product/Product.asp?Item=N82E16835100009
*****
Spare Northbridge cooler (for when the Asus fan fails)
Note - check dimensions and make sure hole span matches mobo holes.
Center to center on mobo of 2.05" (52.1mm) to 2.41" (61.4mm).
Looks to be about 2.29"
MCX159-CU $33 (aggressive cooler since chip gets hot)
http://www.newegg.com/Product/Product.asp?Item=N82E16835108072
http://www.swiftnets.com/products/mcx159-CU.asp
*or* buy spares from the Asus store @ $3 each.
http://estore.asus.com/shop/item.asp?itemid=231&catid=132
*****
I wanted to price all that stuff first, to see what is left for video.
I left out the spare replacement Northbridge fan for now.
80+73+100+44+30+30+5=362
Video card
This 7600GT is $80 after rebate - quiet and low power consumption
http://www.newegg.com/Product/Product.asp?Item=N82E16814143049
A 7900GS is about $145 after rebate:
http://www.newegg.com/Product/Product.asp?Item=N82E16814150208
http://www.xbitlabs.com/articles/video/display/x1950pro-gf7900gs_17.html
X1950Pro for $179 after rebate:
http://www.newegg.com/Product/Product.asp?Item=N82E16814103021
None of the three cards has really high power consumption.
http://www.xbitlabs.com/articles/video/display/x1950pro-gf7900gs_6.html
7600GT 35.8W max, or about 12V @ 3A
7900GS 45.1W max, or about 12V @ 4A
X1950Pro 65.7W max, or about 12V @ 5.5A
In terms of +12V consumption:
CPU 89W (
www.amdcompare.com) 89W/12V * (1/0.90) = 8.24A
Video card (salt to taste...) 4.0A
Hard drive 0.6A
CDROM (I measured mine one night...) 1.0A
Fans (estimated budget for CPU + two other fans) 0.5A
Total 12V @ 14.34A
Check the label on the side of your power supply, for
whatever current you work out for +12V. The 3.3 and 5V
consumption is usually OK (and I cannot work it out
anyway).
Paul