Do I Need a better PSU for 9800 GX2??? HELP!!!

[dcdave78]

O.k normally I think my PSU would be more that enough for a 9800 GX2 but I have a cooling system ( Cool It Elite that draws 70 + watts for Cooling ) that might put me over the edge. Here are my system stats 1. Is my current PSU up to the task and if not recomend me one that would with out breaking the bank.

CPU Q6600 @ 3.15 GHZ 24 hour Burn in on Prime 95
Cooling Cool it Elite Peltier cooler ( Draws about 70 watts according to website's )
Video Card Current EVGA 8800 GTX want to upgrade to 9800 GX2
Mainboard p5W DH Deluxe
Sound Sound Blaster X-Fi Platinum Champion Series 64 Mb X-ram
Hard Drives 74 GB Raptor 10,000 Rpm 8mb Primary Drive
200 GB Maxtor 7,200 PRM 16 mb
PSU Enermax Liberty 620 Watt two 12 volt rails 22 amps each

System runs completely stable now but wondering if the new 9800 GX2 will put me over the top.

Thanks for all comments and suggestions


Dave

 

[boonality]

Neweggs power supply calculator recommends 800-850 watts. I would think though that you would be OK but pushing it. To be on the safe side a PC power and cooling or corsair 750 should handle that load no problem.

 

[boonality]

I was trying to edit my post when my work computer froze (go figure). Anyway I was just trying to say that the newegg calculator isn't as accurate as other power supply calculators out there but it does err to the safe side and it usually recommends higher than necessary.

 

[ainarssems]

I had a peltier cooling before. I used 270W peltier cooling element. 270W is the most heat that it can output. Peltiers for 1 W that it uses of electricity will pump one watt off heat from one side to another up to the maximum of rated power in my case 270W. So for a optimal operation i needed to supply 135W of power to it to pump 135 W of heat away from CPU. If I give it 100 W of power it will remove 100W of heat 1W per 1 W I f I give it 150W of power it will only remove 120W or heat (270-150=120) So I used separate variable power supply to get best perfomance of peltiere. I I remember correctly I ended up with something like 10.4 V and 13A which gave me optimal 135W. My AMD Athlon XP 3200+ was running at 5-10 C at 2.8GHz(2.2GHz stock) at 2.0V and according to calculation giving around 125W of heat. It was around two years ago and I am writing from my memory so some of details might be innacurate.