Can someone explain Maxwell 750 / 750ti pricing to me?

[krumme]

How can you say "Lets be realistic" and then say "I would gladly run a 780Ti on a 400W high quality ps." ?

There isn't anything realistic about that. Not at all. Even if you could do it on one of the best 400WPSU in the world, you wouldn't do it gladly.

If you're going to say lets be realistic, then at least be realistic.

Ofcource i would do it gladly. 90% of the time the computer is running at far less than 100w so a small ps is better for efficiency. No need to waste money and cost for energy on something that is not needed. If i was mining though i would go for something like 500w depending on the efficiency profile of the ps (if using eg 7970).

 

[OCGuy]

It is like debating if the earth is flat, so I'll just stop. But please don't ever give out advice in the PSU sub-forum, that is all I ask.

 

[krumme]

It is like debating if the earth is flat, so I'll just stop. But please don't ever give out advice in the PSU sub-forum, that is all I ask.

I can explain it to you so you understand

Most quality but fairly moderately priced ps like eg be quiet e9 series have a total capacity for the 3+5+12V exceeding the label. The 400w e9 have eg a total capacity of just over 500w. Where the 384w is on the 12v. The 450w part have about 50w more on the 12v. And that is power that have no problem delivering and with eg acceptable levels of noice and precision. And noise and efficiency for that matter.

Bad ps ofcource fail on all major variables no matter what is written on the label.

Now a 780 or 7970 stays well within the limits of 300w. Add as i wrote a 4670 non oc (that dont use the integrated gpu!!) and a sdd and you are within specs.

 

[Will Robinson]

Yes please lecture me. I build my own dac, pre- poweramp and speakers. And especially was very proud of my own low jitter clock design. Tell me about amperage?

LOL...nice

 

[Haserath]

Wow...

You might want to look @ AT's review.

Also a lesson on amperage as opposed to only wattage would help.

I side with krumme on this one.

AT's review uses a LGA2011 build with overclocked 4960X. A non overclocked LGA1150 would handle on a 400W just fine. Especially since, like he said, the quality ones rate their wattage based on the 12V rails alone.

 

[MrK6]

It is like debating if the earth is flat, so I'll just stop. But please don't ever give out advice in the PSU sub-forum, that is all I ask.

Take your own advice.

I can explain it to you so you understand

Most quality but fairly moderately priced ps like eg be quiet e9 series have a total capacity for the 3+5+12V exceeding the label. The 400w e9 have eg a total capacity of just over 500w. Where the 384w is on the 12v. The 450w part have about 50w more on the 12v. And that is power that have no problem delivering and with eg acceptable levels of noice and precision. And noise and efficiency for that matter.

Bad ps ofcource fail on all major variables no matter what is written on the label.

Now a 780 or 7970 stays well within the limits of 300w. Add as i wrote a 4670 non oc (that dont use the integrated gpu!!) and a sdd and you are within specs.

Thank you, quoting for importance. People not understanding the basics of PSU's is a major problem in the DIY community.

 

[blackened23]

I side with krumme on this one.

AT's review uses a LGA2011 build with overclocked 4960X. A non overclocked LGA1150 would handle on a 400W just fine. Especially since, like he said, the quality ones rate their wattage based on the 12V rails alone.

So you think that CPU with a GTX 780ti will handle on a 400W just fine? Even when every 780 manufacturer recommends 600W? And then you have the factory OC'ed 780s that use more power. Alrighty then. If you agree to that, whatever you say. Are there situations where 400W won't be exceeded? Sure. Absolutely. Are there situations where it will be higher? Yes. And most of us are well aware of PSU efficiency factoring, that is not a failsafe. Is every GPU load the same? Nope. Manufacturers of GPUs don't throw a frickin dart on the wall to wildly guess their PSU target. It's for a reason. **whatever. Not even worth discussing or arguing. I like the statement that it's similar to arguing whether the earth is flat or not mentioned earlier. So true. If you guys want to get a gold rated 400W and throw a 700$ GPU in go for it. Have fun. Not even worth discussing. We're crossing the stupid threshold because someone dropping 700$ for a 290X or 780ti is clearly going to lowball their PSU.

 

[coffeejunkee]

Why are you not attacking the guy that says you need a 750W psu for a GTX 760? (Not that he actually said it but he does seem to imply it)

Also have a look at the Mac Pro, 15 cores and 2 gpu's on a 475W psu. Or Steambox, GTX780 and i5 on a 450W psu.

Anyway, GTX 750 Ti is a great drop-in for prebuilt systems. But any psu with 1 pci-e connector (which some 750 Ti's need) will also run any other gpu with comparable performance.

 

[wand3r3r]

So you think that CPU with a GTX 780ti will handle on a 400W just fine? Even when every 780 manufacturer recommends 600W? And then you have the factory OC'ed 780s that use more power. Alrighty then. If you agree to that, whatever you say. Are there situations where 400W won't be exceeded? Sure. Absolutely. Are there situations where it will be higher? Yes. And most of us are well aware of PSU efficiency factoring, that is not a failsafe. Is every GPU load the same? Nope. Manufacturers of GPUs don't throw a frickin dart on the wall to wildly guess their PSU target. It's for a reason. **whatever. Not even worth discussing or arguing. I like the statement that it's similar to arguing whether the earth is flat or not mentioned earlier. So true. If you guys want to get a gold rated 400W and throw a 700$ GPU in go for it. Have fun. Not even worth discussing. We're crossing the stupid threshold because someone dropping 700$ for a 290X or 780ti is clearly going to lowball their PSU.

I could care less about the whole PSU debate, I'd always rather have extra headroom vs. be right on the limit. (I agree with the sentiment, but think it may be possible to use a much lower PSU then is recommended)

The manufacturer's don't cut it very close though.
Take an example:

R9 290x

750 Watt Power Supply is required.

http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1227&pid=2070&psn=&lid=1&leg=0#

Now I am able to mine with dual 290x's using less than that and gaming doesn't use as much power as mining. That's with a few HDDs, a few case fans, etc.

 

[frozentundra123456]

The problem with the initial psu statement was that it was said he would do it gladly. The card is rated 250 watts and an i5 84 watts. 330 watts right there, plus I bet that CPU for brief times exceeds its tdp.

So is it possible--yes, maybe even probable that it would work. But I certainly would not "gladly" risk damaging a high end rig costing a thousand dollars minimum by running it on a 400 watt psu.

 

[TreVader]

IDK why this is surprising. Nvidia has generally never offered more price/performance than ATI/AMD, not @MSRP.


The 750ti is a disappointment for sure, unless you're a miner or you love HTPC

 

[TreVader]

The problem with the initial psu statement was that it was said he would do it gladly. The card is rated 250 watts and an i5 84 watts. 330 watts right there, plus I bet that CPU for brief times exceeds its tdp.

So is it possible--yes, maybe even probable that it would work. But I certainly would not "gladly" risk damaging a high end rig costing a thousand dollars minimum by running it on a 400 watt psu.

There is a lot of bad PSU advice on this forum, I wouldn't be surprised if most people's load wattage was less than 1/2 their PSUs rated voltage.


I remember I built and SSF with a P4 3.4 EE and Geforce 6800 Ultra (the highest power usage card around in 2k4) and it ran perfect on the 240W in that Shuttle with 2 HDD and a sound card. I did run into an issue at 3.8Ghz+ tho, but all that happened was the system got unstable.

 

[krumme]

The problem with the initial psu statement was that it was said he would do it gladly. The card is rated 250 watts and an i5 84 watts. 330 watts right there, plus I bet that CPU for brief times exceeds its tdp.

So is it possible--yes, maybe even probable that it would work. But I certainly would not "gladly" risk damaging a high end rig costing a thousand dollars minimum by running it on a 400 watt psu.

The i5 is as written before running lower than its tdp due to not using the igpu.

For a gamer you will actually never ever exceed the 90% of eg the e9 400w with a 780 or 7970. The same more or less goes for a ib 3570. It will work just fine.

For future upgrade reasons selecting more ps capacity can be usefull but for a balanced setup with max efficiency and lowest building cost the idea of more is better is just wrong. The added capacity is just extra initial cost and lost efficiency.

What happens is users often then select lower quality ps instead of lower capacity but better quality - to be on the safe side. Thats just stupid.

We have a thread about a desktop 750 with excellent efficiency - a 60w card- but the same people praise the use of high capacity ps. The efficiency of the card is lost 2 times using a beefy entry level ps.