card+psu=?

Okedokey said:
And this is just plain wrong.

80% efficiency simply means to provide the full 28A on the 12V rail (or the full 430W across all rails), it will draw 20% more power from the wall.

Therefore in your case, the CX430 can deliver quite happily the full 28A on the 12V rail which is 336W. But in order to do so it will require around 403W from the wall. Or in the unlikely scenario where all voltage divisions are maxed to the 430W (continuous), it will draw 516W from the wall to deliver the 430W DC.

That is all, the PSU can still deliver what it is rated at.

And 28A is LOADS for what either or both of those cards require.
Click to expand...

U r talking to me or to SpringWater?
 
But I didnt get something wrong or right, I made a question.

So, the most efficiency a psu has, the less of power will draw from the wall.
 
dasos said:
There is difference.
7750 draws 55W while 9800gt green draws 75W.
This also means that 7750 will be cooler.
7750 can give more fps in games than 9800gt green(I m gaming but not much)

There is also another one reason, I suspect 9800 reached to its end, but lets dont discuss it now).

Can u explain me this phrase "it will most likely be worse in any CAD tasks/GPU simulations due to a lack of CUDA cores on the AMD card":confused:



Both cards have memory 1GB.
But 9800 has DDR3(which I heard is lame) and 7750 DDR5.



Explain me, why there is less performance? Less performance compare to the active 7750?
Because of -100Mhz clock as Okedokey said?

Awful cooling? I think u r not experienced in passive cooling. All of my cards and cpus are passive in the last years. 9800gt green wears an arctic cooling accelero heatsink, which look like the one of that 7750. And what temp u think I have? 200oC?
The sound difference is like this--> I hear nothing from the whole pc;)
Click to expand...

You would have to use your PC for thousands upon thousands of hours to make the difference in power draw outweigh the price to buy a new card. The heat difference will also affect nothing if everything is working, so these are both moot points.

Now if the 9800GT is dying, different story, by all means replace if the card is failing, but i would not base your buy on the power draw, you aren't saving money and you aren't saving the planet by buying a new card.

If you are going to do any GPU rendered modeling, the CUDA cores, assuming the software can take advantage of them, will make the Nvidia card perform better. If you are not doing any GPU aided CAD work, this does not matter.

Yes less performance dues to lower clock speeds. And do not make assumptions, i have made the mistake of going passive, even replacing the passive cooler with the Accelero S1 as well, and then ended up throwing 2 120mm fans on there because it couldn't keep up. The last time was back on an 8600GT, and i would not go back again. Apart from 2 integrated GPU's that i have all others are actively cooled in a near enough silent computer
 
dasos said:
But I didnt get something wrong or right, I made a question.

So, the most efficiency a psu has, the less of power will draw from the wall.
Click to expand...

Yes kind of. A PSU simply converts AC into 12V DC. So that process is never 100% efficient. Therefore for a fixed requirement (specification) of DC, you always need MORE AC power. The amount more it requires is a measure of efficiency (or inefficiency depending on which way you look at it).
 
Aastii said:
You would have to use your PC for thousands upon thousands of hours to make the difference in power draw outweigh the price to buy a new card. The heat difference will also affect nothing if everything is working, so these are both moot points.
Click to expand...

I already got and use Sapphire HD 7750 Ultimate 1GB DDR5 fanless.
The wei score really went from 6.8 to 7.4
If u dont trust wei, there is 3dmark06; from 12400 to 15300.

I have some questions about this new card, but I ll write them in a different thread.

Yes, those thousands of hours exist. I use pc daily for many hours.
Moot points are for u, who dont use 'green' equipment. For me is important. My goal is not the best performance. I have a dead silent system(although has 3 fans, now in summer time)
The heat difference is detectable. With 9800gt green I had in summer time 59oC minimum with new Silencio case. Now this number is 46oC.
[If I play Hitman5 I get 84oC :D]

Aastii said:
............but i would not base your buy on the power draw, you aren't saving money and you aren't saving the planet by buying a new card.
Click to expand...

Who cares about planet, point is me. I sold the old card and the heatsink, so the cost was lower. Now I have more fps in games. I had no more than 30 in GRID, now I have 70-80.

Aastii said:
If you are going to do any GPU rendered modeling, the CUDA cores, assuming the software can take advantage of them, will make the Nvidia card perform better. If you are not doing any GPU aided CAD work, this does not matter.
Click to expand...

What are these things? cuda? cad?

Aastii said:
Yes less performance dues to lower clock speeds. And do not make assumptions, i have made the mistake of going passive, even replacing the passive cooler with the Accelero S1 as well, and then ended up throwing 2 120mm fans on there because it couldn't keep up. The last time was back on an 8600GT, and i would not go back again. Apart from 2 integrated GPU's that i have all others are actively cooled in a near enough silent computer
Click to expand...

I checked about 7-8 models of 'fanfull' 7750, the differences -when exist- are small. Memory clock 4600MHz instead of 4500, engine clock 820 instead of 800 and things like that.
Assumptions:confused: I never made any. What I do is always considered and sophisticated. Each device has been carefully chosen. I m fanless since 2009.
I guess 8600gt can be fanless(tdp 47W), but has a poor performance. U dont need 2x120 if the rest of your system is 'appropriate'.
U cannot have silent pc with active coolers. Think also about psu's fan, or hard disks:rolleyes:

Now about psu, as the thread is about
the eXtreme Power Supply Calculator tells me I need only 218 or 226W.
In full load, of course:)
 
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