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Thread: Zotac 480 AMP Review: 30W Less Power Draw!

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    Zotac 480 AMP Review: 30W Less Power Draw!

    Here's TPU's review:

    http://www.techpowerup.com/reviews/Z...Edition/1.html

    According to this review, the AMP draws 30W less power than a reference 480 despite being clocked 50MHz higher.

    Also it runs 20C cooler on load. However, looks like Zotac screwed up the fan profile - there is no difference between fan noise while idle and on load

    Looks like this could be the 480 to get - the only problem is that it dumps 300W of heat into your case, so you need good airflow
    Has anyone really been far even as decided to use even go want to do look more like?
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    About time a manufacturer had a stab at reducing the 480s power draw. Its still crap in that regard though. None the less its a start at least.

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    Quote Originally Posted by annihilat0r View Post
    Here's TPU's review:

    http://www.techpowerup.com/reviews/Z...Edition/1.html

    According to this review, the AMP draws 30W less power than a reference 480 despite being clocked 50MHz higher.

    Also it runs 20C cooler on load. However, looks like Zotac screwed up the fan profile - there is no difference between fan noise while idle and on load

    Looks like this could be the 480 to get - the only problem is that it dumps 300W of heat into your case, so you need good airflow
    Cooler takes it's power from the mobo's fanconnector. I have same cooler on my 5870.

    3930K

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    Zotac version of that cooler looks better IMO. It just kinda says sexy.

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    ok im actually quite shocked about this

    from the first fermi article, it shows .99v for 700mhz
    this card is 756mhz at 1.10v

    how the hell did they get 30W in savings, running a 10% higher voltage and 8% higher frequency?

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    They both look crap to me. Why can't they make efficient coolers that dump the heat outside? Like triple slot exhausting cooler. Like GTX 480 cooler on steroids. Is it so hard to make or something? I'm sure many would prefer such coolers instead. I know i'm the one holding the hand raised. Same reason why i picked HD5850 with reference cooler. Because it dumps the heat outside.
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    on a totally unrelated note, you can increase the performance of your 470 by flashing it with a 480 bios. Here you see a 1000 point difference in GPU score in Vantage Performance benchmark at the same settings. Enabled shaders?

    Has anyone really been far even as decided to use even go want to do look more like?
    INTEL Core i7 920 // ASUS P6T Deluxe V2 // OCZ 3G1600 6GB // POWERCOLOR HD5970 // Cooler Master HAF 932 // Thermalright Ultra 120 Extreme // SAMSUNG T260 26"

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    Quote Originally Posted by Manicdan View Post
    how the hell did they get 30W in savings, running a 10% higher voltage and 8% higher frequency?
    if i knew i'd have told you in the review

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    Quote Originally Posted by W1zzard View Post
    if i knew i'd have told you in the review
    only 2 ways to handle this

    either they admit they have magical powers
    or i start part 2 of the, lets flame w1zzard till he quits thread.

    lets go with option A

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    Its a golden sample? B1 stepping? How is there a power drop?

    IDK but 30 watts less load is a nice improvement, only reason I don't like Fermi is power draw. To test W1zards theory he should put that card under water cooling and see what the power draw is. Also nice drop in idle power.

    Edit: Because i see w1zzard is reading this thread I just want to say, thanks for the review.
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    My guess is a two parter:

    1) lower leakage core (maybe this core is 20th percentile in leakage and the original seeded samples were 60th percentile)
    and/or
    2) (significantly) better VRM cooling which leads to better VRM temperatures which leads to higher efficiency which leads to less power consumed by the card (but the same amount by the core itself)

    Either way, if that's what can be expected from the full population of these cards, that's pretty impressive

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    That earlier (stock) GTX 480 was press sample? Most of those uses more power
    than retails. Asus GTX 480 used 22W less power than press sample GTX 480.
    Quote Originally Posted by W1zzard View Post
    if i knew i'd have told you in the review
    3930K

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    inspired by this thread i did some retesting, lower power is only because of the lower temperature:
    http://www.techpowerup.com/reviews/Z...dition/27.html

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    i knew higher temps means worse power draw, but i never saw a real test done showing the correlation. but thats crazy how much it matters.

    maybe i should the fan speeds up on my gpus and see if my kill a watt meter notices a dip

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    doing more testing to produce some kind of graph showing temp vs. power

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    Quote Originally Posted by W1zzard View Post
    doing more testing to produce some kind of graph showing temp vs. power
    These are key characteristics everyone should be aware of.

    With you doing these tests, I have no doubt they'll be as accurate as possible. Thanks.

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    Quote Originally Posted by W1zzard View Post
    doing more testing to produce some kind of graph showing temp vs. power
    got a 5870 around to do the same comparison with?

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    there is the data, linear fit is y = 1.1975x + 215.29

    basically for every °C that the card runs hotter it needs 1.2W more power to handle the exact same load
    Last edited by W1zzard; 05-27-2010 at 11:10 AM.

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    you really are the best

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    So Much Win.

    So, more power draw => more temperature => more power draw => more temperature.

    Scary
    Has anyone really been far even as decided to use even go want to do look more like?
    INTEL Core i7 920 // ASUS P6T Deluxe V2 // OCZ 3G1600 6GB // POWERCOLOR HD5970 // Cooler Master HAF 932 // Thermalright Ultra 120 Extreme // SAMSUNG T260 26"

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    Doped silicon's conductivity should be largely independent of temperature around this range. Conductivity of semiconductors goes up with T because of charge carrier generation, so that may result in more leakage.
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    Quote Originally Posted by W1zzard View Post
    if i knew i'd have told you in the review
    higher minimum fps compared to previous cards is possibly the biggest advantage of gtx 470 and gtx 480, but I dont see that mentioned in your benchmarks. they all appear to be averages

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    Awesome work... and useful!

    Thanks W1zz
    Quote Originally Posted by T_M View Post
    Not sure i totally follow anything you said, but regardless of that you helped me come up with a very good idea....
    Quote Originally Posted by soundood View Post
    you sigged that?

    why?
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    yup, W1zzard hit the nail on the head. i also found this out during testing one of my old gtx480. basically the power difference between 55C and 100C was 60w. the superior cooling from this non-reference card therefore lowers the power consumption by keeping the card cooler. i have my own raw data i could post later when i have time.
    [SIGPIC][/SIGPIC]

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    I've not used a '480... how did you get 55c? Is it within the realms of mid-range watercooling?
    Quote Originally Posted by T_M View Post
    Not sure i totally follow anything you said, but regardless of that you helped me come up with a very good idea....
    Quote Originally Posted by soundood View Post
    you sigged that?

    why?
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