21 réponses à ce sujet

[rear end]

I have been searching the web and have found little or not answer to this question.  I am a total newbie when it comes to video cards and need some direct answers.  I currently have a Dynex 400w PSU and am looking to get a Geforce 9800 gt so that I can finally run DAO.  Can someone please explain to me whether or not this PSU will support the card?  I have read that the 9800 will run minimally on a 400w psu so I think I will be ok.  Again can someone explain this to me? 

[Gorath Alpha]

A Dynex is a "What's That"? product, not from any known, reliable, high quality power supply brand, so you would have to search out one of the de-tuned 9800 video cards that has been redesigned to run on more mundane, lower amperage PSUs, and even then, I'm not certain I'd be comfortable with such a power supply.

There are no more than a dozen high quality power supply brands worth buying, and I can easily name half of them: Enermax, Fortron, OCZ, PC Power & Cooling, Seasonic, and Sparkle.

PC Hardware Basics (and inventorying PC Components)

http://social.biowar...58/index/509580

[rear end]

I am not going ot be able to buy a new psu as my funds are limited. Anyone else have any thoughts?

[Schwinni]

What's your current hardware?

[rear end]

my computer is



Dell Dimensions 8400

3.0p4

3gig ram

Dynex 400w psu (didnt come with pc)

Radeon X1300

[Schwinni]

If the efficiency of your PSU is not that bad, it should work. Perhaps it's a good idea to use the new graphic card's adapter for PCIe power and plug it to 2 different 12V lines of your PSU...

[rear end]

heh that sounds complicated. What will that do?

[Schwinni]

Newer graphic cards have one ore two separate power plugs because the current provided by the PCIe bus is not sufficient. If your PSU has such a PCIe power plug, just use that. If not, you have to use an adapter (should be coming with the new card), which connects two 4pin molex plugs to PCIe power plug, looks like that: http://www.power-on....opciexpress.jpg

Now, your PSU has several cable looms coming out of it and what I meant was, that you better connect this adapter to two different cable looms.

[Franpa]

specs for his PSU


+12V1  17 A (204 W)
+12V2  15 A (180 W)
+5V      6 A (30 W)
+3.3V   6 A (19.8 W)
-12 V   0.3 A (3.6 W)
Total   437.5 W

Modifié par Franpa, 14 mars 2010 - 04:50 .

[Gorath Alpha]

Franpa wrote...

specs for his PSU

14 A for +12V1, 15 A for +12V2, 28 A for +5 V, 30 A for +3.3 V and 0.3 A for -12 V, against 15 A, 17 A, 35 A, 30 A and 0.5 A

Not good enough for much more than a Low End X1300 such as what he has right now!  I think that the HD 4550 would run on that weak of a PSU, and is close to being equal to the official minimum . .

I looked them up (HD 4550 and official minimum): 

www.gpureview.com/show_cards.php

Of course, IMO, the Radeon minimum should be the X1650 XT . .

[Franpa]

I would say he could get this.

BFG NVIDIA GeForce 9800 GT 512MB PCIe 2.0 with EcoIntelligence Low Power Design

Requires 350watt PSU and a combined total 22 AMPS

Modifié par Franpa, 14 mars 2010 - 04:54 .

[Schwinni]

If the PSU really supplies stable 17A and 15A @ 12V it will work.

[Schwinni]

BTW, many people have a totally oversized PSU in their computer.

Have a look at the system they use at computerbase.de:
- Intel Core i7 965 Extreme Edition (OCed to
3,87 GHz)
- Asus Rampage 2 Extreme (Intel X58, BIOS-Version: 1639)
- 3x 2.048 MB Corsair DDR3-1600 (8-8-8-24)
- Pioneer BDC-202BK SATA Blu-ray-Drive
- Western Digital Caviar Black with 1.000 GB and 32 MB Cache

The system uses (under load) 268W in TOTAL with a GeForce 9800 GT.

[Gorath Alpha]

There is a special low-current 9800 GT, designed for use that way -- compare its specs to the normal ones, but 14 amps is what counts (not enough), not the 268, nor the "400" watts.

A modern PSU with a "400 watt" rating, from a good quality brand, such as this Enermax power supply,

www.directron.com/elt400awt.html

Has 20 amps on the 12 Volt circuit. 

www.directron.com/psu.html

Gorath
-

Modifié par Gorath Alpha, 14 mars 2010 - 07:04 .

[Franpa]

You combine the 12v rails to get a more appropriate amperage. Of course cheap ones tend to support a combined total less then what high end ones do and I can't find the combined total supported, on the internet.

Modifié par Franpa, 15 mars 2010 - 05:25 .

[Levi28001]

First Gorath, How dare you leave out Antec in your list...

Back to the topic. Heres some test results for your PSU. While that isn't a "good" a PSU. You do need to upgrade when your not tight on cash, but it will push the 9800gt. 

I would not heavily over clock however if i was you.

Test results for your PSU below if your interested. Its able to push out its labeled power and you should'nt be maxing it out wattage wise seeing as you have a P4 HT.

http://www.hardwares...m/article/557/7

Edit:Had to edit typing was horrible lol

Also you P4 will bottleneck the 9800gt.

Modifié par Levi28001, 15 mars 2010 - 06:11 .

[Gorath Alpha]

For a dozen years, Antec used no one other than Channel Well to build their Power Supplies for them. A few years ago, they started using a second supplier whose products were not even close to as good, and what that second supplier's Antec line is, I can never remember.

[Franpa]

http://www.hardwares...m/article/557/7



^ Is where I got his PSU specs from. He should be perfectly safe with the Energy Efficient 9800 series.

[rear end]

Ok so let me get this straight. I CAN run a low power energy efficent 9800gt with my PSU correct? Also, one of you mentioned now overclocking the card. Are there things I can do to make sure I dont ruin my PSU? I do not plan on overclocking. I jsut want to make sure I CAN use it. Btw, i will be eventually getting a new computer and I will tranfer the video card then. I realize it will bottleneck my pc. It sucks not having money when your a gamer.

[Franpa]

just acquire the low energy efficient video card and you "should" be fine.

[rear end]

Can any of you guys recommend a good low powered 9800 ?

[Levi28001]

http://www.newegg.co...9&Tpk=9800gt ee
Has a mail in rebate, and good reviews. From what i've read in the past PNY is a good brand.
Cards suppose to use 30% less energy than normal 9800gt's.

Unless your looking for a 1 gb model.. this is only 512mb vram. 


If you would give a price range/amount of memory you want more people might could help.

Modifié par Levi28001, 17 mars 2010 - 05:35 .