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360 Frame Rates Same At 720p And 1080i ?


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#1 pcguy760

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Posted 18 August 2007 - 07:12 PM

I am wondering if you guys know wether I will get a lower frame rate if my 360 was set to 1080i than 720p or will it still be the same? I am looking for an excellent picture as well as smooth motion but I can't seem to figure out which mode to use on the 360 and my tv is a 65" WS Hitachi Ultravision HDTV which supports 480p, 540p, 720p, 1080i

Also, will the picture look the same if I used the TV's DVI input or the HD RGB Component Input?

Thanks!



#2 PotFarmer

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Posted 18 August 2007 - 09:10 PM

In my opinion i think there is a higher framerate during graphically intense gameplay at 720p compared to 1080i. biggrin.gif

#3 pcguy760

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Posted 18 August 2007 - 11:30 PM

Really? Anyone Else? blink.gif

#4 PotFarmer

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Posted 19 August 2007 - 12:56 AM

yes really, this is what i have observed.

#5 SphtKr76

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Posted 19 August 2007 - 02:37 AM

If you TV is a CRT like I think, then it is most likely going to take a 720p signal and scale it to 1080i. Most CRT HDTV's will only display 480or 1080, and some will accept 720 and resize it. If thats the case then it really does you no good to output at 720. I used to play on a 55" 1080i Mits and I never thought that it wasn't smooth.....

#6 pcguy760

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Posted 19 August 2007 - 06:45 PM

Okay thanks guys, guess I will just keep the TV at 1080i and yeah I did notice when I press the "HD
button or the "Info" button it either displays 540p or 1080i. Now I did notice that the 1080i looked better than the 540p. Oh and btw, the TV is Rear Projection so yeah it has those three CRTs in there.

So what about the 360 - Do I set the 360's output at 1080i or set it 720p?

Thanks for all the advice! happy.gif

Edited by pcguy760, 19 August 2007 - 06:45 PM.


#7 PotFarmer

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Posted 19 August 2007 - 08:35 PM

Most 360 games are rendered at 720p, then upscaled to 1080 resolution. Since your tv already will upscale the image produced at 720p, you may as well distribute the work load the 360 has to do by letting your tv take care of some of it. In my opinion, setting your xbox to 720p will be the best balance between picture quality and framerate.

You will be losing quality on anything that would be rendered in 1080 however. There are a few games that have been released recently that do this, and all HD-DVD's are in 1080 as well, so you would be getting the best quality from those by changing your settings to 1080i when you need too. (if you want to, obviously) wink.gif

Edited by PotFarmer, 19 August 2007 - 08:40 PM.


#8 SphtKr76

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Posted 19 August 2007 - 08:36 PM

Like I said earlier, your TV will convert the 20p to 1080i anyways, so you might as well set the 360 to 1080i in the first place.....

#9 PotFarmer

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Posted 20 August 2007 - 12:53 AM

I don't get what your saying SphtKr76. huh.gif

I'm trying to say let the tv do the work, so your system will output a higher framerate with essentially the same image on the screen. happy.gif

#10 pcguy760

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Posted 20 August 2007 - 02:32 AM

LOL, okay guys I am gettin confused what to do now tongue.gif

#11 Navillos

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Posted 20 August 2007 - 04:02 AM

if the tv ouputs 1080i native then thats what you need to leave the 360 at. if you set the 360 at any other resolution, then the tv has to upscale which will result is a not so go picture. you always want to go by the native resolution of the tv. for the best picture you need a tv thats 720p native (lcd, plasma) and the 360 set to 720p which is its native resolution. so in your case leave it at 1080i if thats what your tv's is.

Edited by Navillos, 20 August 2007 - 04:07 AM.


#12 PotFarmer

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Posted 20 August 2007 - 10:58 AM

bah whatever just do what you think looks better.

#13 twistedsymphony

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Posted 20 August 2007 - 03:32 PM

he says he has a Hitachi Ultravision, which is a DLP set. so no, it does not scale to 1080i ... according to hitachi's website it's 1280x720 frame.

1080i is capped at 30 frames per second
720p is capped at 60 frames per second

you will never get any faster performance out of either signal type

looking at the specs of your set 720p is the absolute best choice to send to it.

Even if your TV was not 720p native... it's still a safe choice because thats what most games render to natively on the console.

If you output at 720p then most games wont use the Xbox 360's scaler. if your TV is 720p native then it wont use it's own scaler either.

if you output at 1080i or 1080p then most games will use the Xbox 360 scaler and if your TV is not native to those resolutions then it will use it's own scaler as well. This is VERY undesirable. Ideally you should try to use no scalers at all, and if you must you should try to use only 1, either the 360's or your TVs not both.

720p will provide you with a clean unscaled image which is the most accurate picture you can get.

#14 pcguy760

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Posted 20 August 2007 - 05:49 PM

Hey Twisted thanks for all the info but I must inform you that it is indeed rear projection and crt based not dlp - the model no. of my TV is 65SWX20B just incase you wanted to check...


#15 twistedsymphony

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Posted 23 August 2007 - 07:59 PM

In that case the native res is 1080i and everything will get cropped to 30FPS in the upcomversion no matter what.

your best output resolution would be to set your 360 to 1080i...




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