Ower supply question

[jberry72]

im doing a new build im going to be ordering everything either friday or monday.

q6600
radeon 4870
dark knight 1283 hsf
ga p45 ud3p mobo
1 dvd burner
ocz plat. 4g 1066mhz memory
1 card reader
cm 690 case or the nzxt tempest(havent fully decided yet)
ill probably running 4 120mm fans

anyways i did a psu calculator and it came up with 421watt. that was with 2 4870 cards in crossfire. that just doesnt seems right at all. i did the crossfire just in case i decide to get one later on down the line.
but my question is what size wattage psu should i be looking for? any and all help will be great
thank you

 

[pr2thej]

550ish with 30a 12v rail as a minimum. Something from the PCP&C range would be hawt. If you want xfire, look for 4x6pin and a big fat rail...im thinkin the 750 / 800w with 60a or so.
Whats with the 1066MHz ram anyhoo? Dont think the Q6600 utilisis more than PC6400.

 

[Mondoman]

Yep, stay away from overclocked RAM (i.e. rated higher than 1.9V) and definitely stay away from OCZ overclocked RAM.

I would think 2 or 3 120mm exhaust fans would be enough. Intake fans often cause problems with airflow.

 

[jberry72]

so i should drop down to 800mhz ram then? if so what brand is good cause ill be o/cing my rig.
as for the fans it was a max guess on how many id be running.
thanks

 

[pr2thej]

Actually i like OCZ RAM. I think Mondoman is getting at the fact that OCZ advertise the RAM at say 5-5-5-18 @ 2.1, yet when it comes the stock speed is lower and boots @ 1.9 therefore kinda false advertising :lol:
Other good brands are Mushkin, G.Skill and Corsair. Cant really go wrong with them around the $40-50 price mark.
Fans have a minimal impact on PSU draw, its mainly based on your GPU, HDD's and CPU.

 

[Mondoman]

Just buy DDR2-800 RAM rated at 1.8 or 1.9V. Corsair makes some good stuff in that category.

 

[jberry72]

so my gaming rig ddr2 800 would be the best choice and less fuss for memory?

 

[pr2thej]

Correct.

 

[jberry72]

ok thanks alot im glad i found that out now instead of after tomorrow when i order everything.