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x1900xt + 400w antec psu?
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krameriffic
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Still seems a little low. The X1900s draw well in excess of 200W of power under full load. Maybe even over 250W.
amd ati FO SHO
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micronix said:
That means 10A for cpu 12v and 15A for Gpu/drives 12v...
400w, may be cutting it close for a power hungry x1900xt
i dont think thats how it works. you actually combine the 12v amp ratings. what your saying wouldnt make since most dual rail power supplies dont have over 20 amps on an individual 12v rail. so using your logic virtually NO psu would be strong enough. the x1900xt needs well over 20 amps for reliable operation.amd ati FO SHO said:
Stellar
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400W is plenty. The factory recommended rating is 350 or 20A on the +12v.
OEM and custom builders are running XT and GTX 512s in SFF cases with 250W units just fine as well. You just won't be doing any heavy overclocking with them, and they need to be kept reasonably cool.
OEM and custom builders are running XT and GTX 512s in SFF cases with 250W units just fine as well. You just won't be doing any heavy overclocking with them, and they need to be kept reasonably cool.
you guys need to get some facts straight. i think most of you are just making up stuff as you go. this is from ATI's website:Stellar said:
Power supply notes:
450-Watt power supply or greater, 30 Amps on 12 volt rail recommended (assumes fully loaded system)
PCI Express compliant power supply required. Connect directly to the power supply with a 6 pin PCI Express power connector
For CrossFire: 550 watt power supply or greater, 38 Amps on 12 volt rail
i do agree his 400watt psu should be enough since he doesnt have a lot drives. also the SFF 250watt power supplies are MUCH better than a regular psu.
CleanSlate
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You should be fine. And you don't add the amps together, those are completely seperate rails, which is why they arent advertised as "35A on 12v line" because each line is dedicated to what it's used for. 15A dedicated should be enough for any gpu.
I think I could run any GPU on my system with my 18A single line psu. Infact, a 420w is probably overkill for any single hard drive system. Of course I mean single GPU, not SLI. And not dual cpus either with 2 or less 80mm fans and one cdrom with a floppy disk drive.
~Adam
I think I could run any GPU on my system with my 18A single line psu. Infact, a 420w is probably overkill for any single hard drive system. Of course I mean single GPU, not SLI. And not dual cpus either with 2 or less 80mm fans and one cdrom with a floppy disk drive.
~Adam
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krameriffic said:
A FX57 rig with XT, 2gb rig etc. burns 275w at 100% load. Reported as peak, not average. Scroll down a bit. "Watt did you say?" headline. http://www.guru3d.com/article/content/342/4/
So with dual core, he will be running a bit higher, and then more if OC. He will be running it hard no doubt. But yeah your estimates are a wee bit high. After all, with those specs my 650w would have given up on my 2. I think a lot of psu issues tend to be whether it like the rail setup. Is the power mostly on the 12v? Is the 12v on single, dual, or 4x 12v rails? Like that.
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[Spectre]
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12v rails are not additive normally (there are a few exceptions). The combined 12v is capped by the output of the rectifier that feeds the 12v rails.
i should probably note that i have 3 hard drives in the system. two ide and one sata. still, i dont think my system is using more than 200w at the moment, and the addition of 120w at peak should still not put it over 350. antec units are known to supply the power they advertise unlike some other brands, so i *think* i should be fine.
CleanSlate
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Watts are not the concern. You definately can put out enough watts for almost any mid-high end system but the amps are a different story.
~Adam
~Adam
CleanSlate
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Spectre said:
You heard the man, I'd trust his word over mine.
well a system with ONE hard drive and an FX 55 used 315 watts max according to anandtech. http://anandtech.com/video/showdoc.aspx?i=2695&p=6 so you you will be getting close to the your limit.micronix said:
you do add the 12v lines together. they are not completely separate. that would make NO sense because all high end cards suggest WELL OVER 20 amps on the 12v. if you look almost all dual or multi rail power supplies have around 18 amps or so on the individual lines. if they were not combined then there would not be enough amperage to run an x1900xtx or other high end card. http://forums.silentpcreview.com/viewtopic.php?t=23916
read this http://www.silentpcreview.com/article273-page2.htmlMav451 said:Man, my immense brain fart is having severe consequences.
i am by no means an expert but i cant figure out why so many people on here have no clue about power supplies. i have never built a pc. the only thing i have done is install a few video cards. you guys almost always post opinions as facts. these forums give out so much bad advice. that bad advice gets passed on as fact to others. i always try to back up what i say or suggest with facts. a little research outside the forums can go a long ways.trek554 said:
Well, there goes your credibility. I've actually built 5 PCs, 1 for friend, 2 for families, and two of my own (my previous XP-M setup, and my current Opteron setup). You do realize if I didn't know what I was doing, that my system wouldn't be stable at overclocked settings, dont you?
Um, actually it is. You've think your subtle flames and insults go unnoticed? You built no PCs, but you post a link. By posting a link, you think that all of a sudden, your PC "knowledge" is greater than actual REAL WORLD experience.
Build a PC instead of posting 500 times. Trust me, building a PC gives you more experience than reading a million forums will EVER give you.
Build a PC instead of posting 500 times. Trust me, building a PC gives you more experience than reading a million forums will EVER give you.
you proved my point. you have experience but didnt really have a clue about what you were saying about your psu. everybody else making inaccurate comments in this thread has probably built their own pc too. my credibility can be backed up because i do a little research before i make a comment. do you want me to post 4 or 5 links to info since 1 is not enough for you.Mav451 said:
trek554 said:
Dude, I'm saying research is only HALF of the battle. Now, I realize SPCR is one of the more credible sites (e.g. the antithesis is Tom's) but you still have to put it in REAL practice.
Sometimes some of what you read is wrong (like my brain fart). All the reading in the world isn't enough UNTIL you have done your own, hands-on research. Just my recommendation.
like i said its nothing personal. look at all the other inaccurate comments in this thread alone. building a pc or anything else does not always give you the correct knowledge on a specific subject. i raced bicycles for years and the team mechanics were wrong all the time. i will probably need your advice on certain things when i decide to build my own so i have no desire to burn any bridges.Mav451 said:
i'm not too thrilled about seeing my thread get hijacked and turned into a flamewar. all i'm trying to figure out is if my 400w Antec SP-400 will be compatible with the x1900xt that i should be getting in the mail soon. if it isnt, i'll have to order something better so that the card doesnt lay around for a week after i get it. i would order a new psu now, but i dont want to waste money. hence my dilema. seeing as how everyone is giving different information (opinions as facts, etc..), i cant come to a final conclusion.
CleanSlate
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What do you mean by "slot"? Sorry if I'm not up on the 'psu lingo'.
Btw, building your own pc has little to do with credibility when it comes to things that can be researched. However, when you are about to build a pc you do more research in a week to a month than most people do in like a year because you dont want to waste your money or even someone elses.
~Adam
Btw, building your own pc has little to do with credibility when it comes to things that can be researched. However, when you are about to build a pc you do more research in a week to a month than most people do in like a year because you dont want to waste your money or even someone elses.
~Adam
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micronix said:
Compatible yes. Will it work with your system.....most likely....however it is not the best candidate for the job. If you have any problems with it post back and one of the more knowledgable members or myself will be happy to assist. If you feel your question has not been competely answered right now feel free to make a new thread. I am locking this one down since it did get sidetracked......though there was nothing that really qualifies as flaming.
For the people who were using report post feature it is a great tool to assist the mods but don't cry wolf if you dig yourself into a hole.
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