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View Full Version : Whats the Power Supply Needed for a 6800GT



IZT
11-21-2004, 09:46 AM
My System is like this MSI motherboard with 533 FSB and 2.66GHZ Pentium 4, DDR 1GB Ram, 80GB Harddrive, Combo CD-RW-DVD drive, Joystick, Mouse , keyboard, Subwoofer and 2 speakers, printer, LCD screen, Internal 56k modem.

After i install the 6800GT 256mb DDR3, is 400Watts mroe than suficient? or should i get something like 430W++ or 500W++??

IZT
11-21-2004, 09:46 AM
My System is like this MSI motherboard with 533 FSB and 2.66GHZ Pentium 4, DDR 1GB Ram, 80GB Harddrive, Combo CD-RW-DVD drive, Joystick, Mouse , keyboard, Subwoofer and 2 speakers, printer, LCD screen, Internal 56k modem.

After i install the 6800GT 256mb DDR3, is 400Watts mroe than suficient? or should i get something like 430W++ or 500W++??

ivanmoe
11-21-2004, 10:12 AM
The fact is that a 400W might not be enough.

I had to swap out a Fortron Aurora 400W for an Antec TP430W because my 3.3v rail (which supplies the AGP slot) was sagging and causing 3D progams to crash.

And the extra 30W wasn't really the solution, but rather the amount of juice being supplied to that one device.

Moe

F16_txmx
11-21-2004, 12:33 PM
350W here and no problems. 480W are recommended if you are going to overclock your 6800 card.

mortoma
11-21-2004, 12:51 PM
As an electronic/computer technician by trade, I always advise people to buy the biggest P.S. they can possibly afford. This way you can be assured that in the future upgrade process you'll not have to buy yet another P.S. One thing holds true for P.S.s ( and for UPSs too ) and that is you can have one too small, but never, never, ever can you have one that's too big. Always remember that rule. If I could afford a one billion megawatt P.S. and a 10,000KVa UPS, I'd have them!!!

Drone
11-22-2004, 05:19 AM
You know I never used a UPS up until this past year. Now I'll never run my own PCs without one now. This past year we have had a few power outages and at least one Brownout. Also in the heat of the summer when my A/C kicks in so does my UPS for a fraction of a second. Just goes to show that my power company has supply issues when demand is high....

SeaFireLIV
11-22-2004, 07:15 AM
Following on the advice of `you can never have enough`, I bought a 350W PSU 2 weeks ago. But while here in London spotted a beautiful 550W dual fan Gold psu for a really good price! I snapped it up! There was even a 750W psu going too, but I had to stop myself from paying the extra pounds for that one! http://forums.ubi.com/images/smilies/16x16_smiley-surprised.gif Nearly, nearly did though...

Vengeanze
11-22-2004, 07:35 AM
- When buying a PSU plz read in on reviews to see if the voltage feeding fluctuate too much or stays within the 10% limit during load and unload.
U don't want the voltage to drop too much.

- STAY AWAY FROM Q-TEC!!

- Also check if the new PSU is compliant both with todays technology as well as future technology such as PCI-Express and S-ATA.

- Cooling is important too. It must have 2 ball bearing fans.

- Overclockers like if the PSU has the possibility to manually change the voltage on the different rails. Some PSU's comes with that.

- Another thing to look for is "Dual +12V rails".
It basically means the feeding is separated between CPU/MOBO (sensitive stuff) and the rest.

I bought this one a couple of days ago:
ENERMAX 470W NOISETAKER AX 2.0

Check out Extreme Overclockers articles (http://www.extremeoverclocking.com/articles.php#13) on power supplies.

Good luck and remember u can't ever have too much power. http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif

Vengeanze
11-22-2004, 07:40 AM
Like Hunt said in another post Enermax or OCZ is preferred.
OCZ more for overclockers though (like Hunt http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif).

BinaryFalcon
11-22-2004, 07:45 AM
350w is fine.

If you want to have a bit more margin go for a 400w or higher.

The most important thing is to get a quality power supply. That matters far more than the raw wattage of the thing, as a cheap 450w PSU can be much worse and support less than a quality 350w model.

In general, a rough guide to PSU quality is its weight. The heavier it is for its size, the more likely it is to be a good unit. In general.

Otherwise stuff from Antec is always a safe bet.

SeaFireLIV
11-22-2004, 08:07 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Vengeanze:
-
- STAY AWAY FROM Q-TEC!!

<HR></BLOCKQUOTE>

Why o why did you have to say that? Well before I take it back please explain what`s so bad about it? I checked a few user reviews and they seemed pretty positive.... http://forums.ubi.com/images/smilies/cry.gif http://forums.ubi.com/images/smilies/cry.gif http://forums.ubi.com/images/smilies/cry.gif

Vengeanze
11-22-2004, 08:22 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by SeaFireLIV:
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Vengeanze:
-
- STAY AWAY FROM Q-TEC!!

<HR></BLOCKQUOTE>

Why o why did you have to say that? Well before I take it back please explain what`s so bad about it? I checked a few user reviews and they seemed pretty positive.... http://forums.ubi.com/images/smilies/cry.gif http://forums.ubi.com/images/smilies/cry.gif http://forums.ubi.com/images/smilies/cry.gif <HR></BLOCKQUOTE>


Lol, sorry. Maybe Hunt can be more technical (love it when he is) about this.
From what I've read and heared (no personal experience) the Q-tec PSU's are cheap but fluctuate too much in the voltage feeding.
And their alleged watt is just a once-in-a-blue-moon peak value.

Guess u could say it's a question about "true" voltage feeding.
Quality PSU give 3.3V/5V/12V +-5% deviasion while low quality has a higher procentage deviasion which will cause instability at the best.

Here's (http://www.extremeoverclocking.com/articles/guides/Power_Supply_Guide_1.html) some good basic info on powersupplies.

Commonly peeps say a Q-tec 550W equals a quality PSU at 350W.

But don't worry...until u get instability issues. Then u know where to look. http://forums.ubi.com/groupee_common/emoticons/icon_wink.gif

Supr
11-22-2004, 09:09 AM
just get the one that weighs the most.

lol, jk, but it is true most of the time. Cheap supplies always seem to be very light.

SeaFireLIV
11-22-2004, 09:47 AM
Well this one I`ve got is certainly heavier than any other PSU I`ve had. I`m also aware that often the Wattage isn`t precisely what it says... The fan is a 550W Dual fan gold but by Q-TEC. I checked a couple of reviews on it first (personal, not company) and they were quite good around 2-1 in favour....

The thing is my means of buying stuff off the net is extremely limited.

IZT
11-22-2004, 09:58 AM
OK so this is waht i wanna get heres the review

http://www.overclockercafe.com/Reviews/other_misc/RaidMax_PSU/index.htm

U guys think it will b fine?

mortoma
11-22-2004, 11:03 AM
Yea, the guys are right, I forgot to mention getting a good brand name!! I use Antec power supplies and never had a problem.

RevvinUK
11-22-2004, 11:13 AM
I use a Q-Tec PSU with no issues using my 6800 Ultra OC and had no issues using another in my old system which ran an ATi 9800 Pro.

TgD Thunderbolt56
11-22-2004, 11:15 AM
PC Power & Cooling == teh tank...be sure

Gr7_Bizu-RO
11-22-2004, 06:10 PM
I use Antec 400 watts..it works fine with the card default settings...

ednew
11-22-2004, 07:21 PM
I had an ANTEC 430 Truepower, until I got an X800XT pe, problems over about 2weeks and than total death. Put in an OCZ470 and have not have a problem since. Oh I do overclock, a bit.