Both cards are having their own pros and cons
the results of various bench markings are here
for GTX 460 card is Palit GTX 460 and for 5830 card is asus Radeon HD 5830
futuremark 3D vantage @1920x1200
GTX 460 :8965
ATI 5830 :8259
for game bench mark
alien vs predator directx 11 based game with maxquality 4xAA,16xAF@192x1200
GTX 460 :avg 30 fps
ATI 5830 :avg 23 fps
battlefield bad company 2 directx 11 based game with Maxquality 4xAA,16xAF@1920x1200
GTX 460 :avg 54 fps
ATI 5830 :avg 48 fps
call of duty modern warfare 2 with
4xAA@1920x1200
GTX 460 :avg 56 fps
ATI 5830 :avg 38 fps
crysis warhead @1920x1200
GTX 460 :avg 37 fps
ATI 5830 :avg 32 fps
dirt2 which is a directx11 based game @1920x1200
GTX 460 :avg 73 fps
ATI 5830 :avg 51 fps
farcry2 directx 10 based game @1920x1200
GTX 460 :avg 67 fps
ATI 5830 :avg 31 fps
Reviews
Palit GTX 460 Sonic Platinum & Inno3D GeForce GTX 460
By Steven Walton on July 12, 2010
Editor: Julio Franco
Read user comments (28)
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Final Thoughts: A Winning GeForce
[COLOR=#05408f !important][COLOR=#05408f !important]Nvidia[/COLOR][/COLOR]

has done an excellent job with the GeForce GTX 460 and it’s the first graphics card from the green camp that we have genuinely been excited about from the get go in quite some time.
The GTX 460 768MB version is expected to retail for
just $200 and has inherited the responsibility of taking on the
[COLOR=#05408f !important][COLOR=#05408f !important]Radeon[/COLOR][/COLOR] HD 5830. So the first question we must address is how these cards compare? Using our 1920x1200 data we find that on average the Inno3D GeForce GTX (768MB) was 7% faster than the
Radeon HD 5830. Not bad for a graphics card that costs the same, consumes slightly less power, runs cooler and quieter.
However, the real ace in the hole for the GeForce GTX 460 is its
extreme overclocking ability. Without adjusting the GPU voltage in any way, we were able to boost the clock frequency from 675MHz to 865MHz. This results in a hefty performance gain, in games such as Call of Duty: Modern Warfare 2 for example, we saw a
[COLOR=#05408f !important][COLOR=#05408f !important]bump[/COLOR][/COLOR] 
of over 20% allowing the Inno3D GeForce GTX (768MB) to mimic GeForce GTX 470's performance at a fraction of the price.
Reviews
Palit GTX 460 Sonic Platinum & Inno3D GeForce GTX 460
By Steven Walton on July 12, 2010
Editor: Julio Franco
Read user comments (28)
Find graphics card prices
Bookmark / Share this
Final Thoughts: A Winning GeForce
[COLOR=#05408f !important][COLOR=#05408f !important]Nvidia[/COLOR][/COLOR] 
has done an excellent job with the GeForce GTX 460 and it’s the first graphics card from the green camp that we have genuinely been excited about from the get go in quite some time.
The GTX 460 768MB version is expected to retail for
just $200 and has inherited the responsibility of taking on the
[COLOR=#05408f !important][COLOR=#05408f !important]Radeon[/COLOR][/COLOR] HD 5830. So the first question we must address is how these cards compare? Using our 1920x1200 data we find that on average the Inno3D GeForce GTX (768MB) was 7% faster than the
Radeon HD 5830. Not bad for a graphics card that costs the same, consumes slightly less power, runs cooler and quieter. However, the real ace in the hole for the GeForce GTX 460 is its
extreme overclocking ability. Without adjusting the GPU voltage in any way, we were able to boost the clock frequency from 675MHz to 865MHz. This results in a hefty performance gain, in games such as Call of Duty: Modern Warfare 2 for example, we saw a
[COLOR=#05408f !important][COLOR=#05408f !important]bump[/COLOR][/COLOR]

of over 20% allowing the Inno3D GeForce GTX (768MB) to mimic GeForce GTX 470's performance at a fraction of the price.
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Looking at the 1GB variant of the GTX 460, we must give props to Palit who are showing an impressive product in the
GTX 460 Sonic Platinum (1GB). It's rare to see these days a
[COLOR=#05408f !important][COLOR=#05408f !important]graphics [COLOR=#05408f !important]cards[/COLOR][/COLOR][/COLOR] using a custom PCB, cooling and factory overclocking on the same package and at launch time.
The 1GB version of the GeForce GTX 460 has been suggested to retail for
$230-240, about 20% more expensive than the 768MB version. On paper the 1GB cards have 33% more bandwidth at its disposal thanks to the 256-bit wide memory bus. The Palit GTX 460 Sonic Platinum (1GB) is of course much faster than a standard 1GB card running at stock speeds. For a
brief comparison of the two look at our overclocking section where we underclocked our Palit sample.
At its factory overclocked speeds, we found the Palit GTX 460 Sonic Platinum to deliver roughly the same performance of the
GeForce GTX 470 which costs considerably more, consumes more power and is louder. Moreover, when compared to the
Radeon HD 5850, the GTX 460 Sonic Platinum was more often than not the faster board, all while saving you a hundred bucks in the process.

so better to take GTX 460
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