if your budget isnt stuck at $1k, an upgrade to core i7 would not cost you a ton more and is significantly better, and upgradeable down the road. LGA 775 is EOL.
True, i7 would definitely be faster but that would involve changing the barebones base. Going from the XPC SP45H7 to the SX58H7 would cost a bit more. Upgrading the memory from DDR2 to DDR3 would also cost extra. Not to mention the physical box itself is also bigger. So I decided to stick with a more modest LGA 775 mobo to cut costs across the board.
You're mistaken about the PSU - IT WILL NOT RUN
http://ati.amd.com/products/radeonhd4800/requirements.html
Also notice I posted a different case, since the first one I posted was an accident, and it actually is quite small.
Here's another more expensive but cool looking one:
an HD 4870 has a TDP of 150 watts, the 955 has a TDP of 125 watts, which on your average 300 watt PSU puts you about 30 watts over capacity already. Dont try it or it will go off like a fire cracker.
Since the quality and reliability of PSU's vary from manufacturer to manufacturer, GPU makers will give very generous wattage requirements to be on the safe side.
For example, that site requires a 450 Watt or greater for an HD 4850. However, I know many builds on a SP45H7 with a 300W psu that incorporated the HD 4850.
The 4870 can draw an extra 40 watts over what the 4850 can, its best to just be safe and pay the extra. Would you rather pay an extra $60 now for a bit of extra power you might not need, or would you prefer an extra 1k after you upload the video to youtube? Its better to be safe than to fry your rig, a hell of alot cheaper too.
Just gonna put this out there, I do not think i have ever seen my system over 350watts at very high loads. I think you can do it on a 300(since your cpu is more efficient and you do not have 6 hard drives ect)
Would be very close, but there is NO way a 4870 needs a 500 watt psu. unless maybe its a turbogamer(pile of fn crap) 500watt
In this test, they ran a Core 2 Quad QX6850 (3 GHz) with two sticks of DDR3 memory, DVD drive, and a radeon 4870. The results for the power consumption test was 283 W at the power supply under full load.
The QX6850 is 4 cpu cores and uses 65nm whereas my E8400 is only 2 cores and uses 45nm meaning greater efficiency and less energy usage.
And I absolutely agree with hunter315, I would definitely spend the extra money and get a PSU with a little more juice. I'd much rather be on the safe side and have more overhead, greater reliability and durability for the system. But I spent the past few hours searching online for one without success. Shuttle doesn't offer one that's compatible with the SP45H7 so I've resorted to searching through server psu's hoping to find a slim model with the right dimensions but that search has been fruitless.
It seems my best option is to stick with the stock 300w psu and maybe a year later, when it starts to wear out and the max wattage capability decreases, hopefully I'll be able to acquire a better psu and make the upgrade.
Just gonna put this out there, I do not think i have ever seen my system over 350watts at very high loads. I think you can do it on a 300(since your cpu is more efficient and you do not have 6 hard drives ect)
Would be very close, but there is NO way a 4870 needs a 500 watt psu. unless maybe its a turbogamer(pile of fn crap) 500watt
UPDATE - Another Succesful Build on the Shuttle SP45H7 + GTX 260
I built a very similar machine last weekend using the SP45H7 and a BFG GTX 260. The 300W powersupply is fine. I am able to game on max settings (Bioshock, Call of Juarez, others) for 4+ continuous hours.