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For my work, hobby and business, I need COMPUTING POWER! However, my needs are kinda picky and it took me many days to narrow down the 'ideal' hacking computer. This computer is for electronics hacking, and its also for business. Yeek! We got two of these, one as a personal workstation for all the web, graphics, programming, etc. And another one as the 'business' machine - for shipping, programming chips, etc.
Here is what my specifications were
We like small desktop computers so we went with the Shuttle brand for a machine. We tend to build up machines ourselves since its often cheaper and better to do it this way. Looking through the AMD processor machines we found only a few with both serial and parallel (from our notes we wrote down SA76G2, SK22G2, SN21G5, SS21G, SS21T). For Intel machines you'll have to scour the Shuttle website.
It seemed like the SA76G2 was the model that was currently available, and not too expensive ($200 for motherboard/case/powersuppy). It comes with VGA, DVI, Ethernet, PS2, USB, 2 serial and a parallel port. This is great because we have onboard networking, video, and the ports we like.
For the processor we actually went with two options. One was the 'AMD Phenom II X4 810 2.6GHz 4 x 512KB L2 Cache 4MB L3 Cache Socket AM3' ($150, this was for my personal workstation) and the other was the "AMD Sempron 140 Sargas 2.7GHz 1MB L2 Cache Socket AM3 45W" ($40, for the shipping/programming workstation). The shuttle cant power more than 95W so dont try to overdo it or you will get heat problems!
RAM is RAM in our opinion, you need 240-Pin DDR2 SDRAM PC2 6400. Since windows XP 32 cant recognize more than 4 G I just got 4G for the personal workstation and 2G for the shipping/programming workstation.
I rarely burn discs, so I just got a DVD-ROM for installing software. eh.
You can go with SATA or IDE. Since everything else here is IDE, we went with 160GB IDE drives.
None! The onboard video was perfect. Theres a video slot but we actually used that for the serial port bracket
Theres a single PCI card slot, which we used for a WiFi card on the personal workstation. The business machine ended up connected to the ethernet drop so that was fine.
The computer has parallel on board, and theres a punchout on the case, but you'll need a PC8 parallel port adapter cable which has a 2mm header (NOT 0.1" IDC!)
If you're feeling adventurous, you can actually get two of these and a Keystone 9200-15 (double DB-9 bracket) and double up for both COM ports!
Personal machine: $200 + $150 + $80 + $30 + $50 + $20 + $10 + $20 = $560 - Nicer processor & 4 G RAM & wifi Business machine: $200 + $40 + $40 + $30 + $50 + $10 + $20 = $390 - Cheap processor & 2 G RAM & no wifi
I rounded up because I didnt include shipping. The keyboards and monitors were recycled. We've been happy with this set up, hopefully it will be useful for someone :)