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Help comparing graphics cards

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  • Graphics Cards
  • AMD
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Last response: in Graphics Cards
a c 79 U Graphics card
a b À AMD
a b Î Nvidia
August 17, 2014 10:10:31 PM

Hello Everyone,

I have an AMD Sapphire Radeon HD 7850. I am trying to see how it compares to a 7870, R9 270, R9 270x, Nvidia 660, and Nvidia 760 etc.

Typical 7850 hardware with 2GB GDDR5. Its running at 1200Mhz core and 1400Mhz vRAM.

According to GPUz its sitting at:
38.4 GPixel/s
76.8 GTexal's
179.2 GB/s Bandwidth

Also I did a 1080p benchmark with Bioshock Infinite using its built in benchmark at maxed settings. It got an average of 53.09FPS.

Would help with comparing them as I'm not sure where to place it.

More about : comparing graphics cards

a c 134 U Graphics card
a b À AMD
a b Î Nvidia
August 17, 2014 10:16:51 PM

at your clocks your roughly as fast as 660/7870/270s clock at about 950-1000mhz.

the 7870/270/270x is a 1280 core pitcairn chip while your 7850 is a 1024 core pitcairn chip. so the full pitcairn chip has 25% more steam processors than your gimped pitcairn chip. performance will scale fairly even with core clock to processor count. the 270x is just a higher clocked 270... likely a slightly better binned chip... otherwise they are exactly the same.

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a c 1000 U Graphics card
a c 576 À AMD
a c 437 Î Nvidia
August 17, 2014 10:17:21 PM

http://www.techpowerup.com/reviews/AMD/HD_7850_HD_7870/...
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_7...
http://www.techpowerup.com/reviews/MSI/R9_270X_Gaming/2...

Sadly you have to compare each in their own, as they were released at different times. First one is comparison between 7850 and 7870 era cards, next is nvidia cards such as the 760/770 to the 7870s, and last is comparison of R9 cards to the Nvidia cards of the second list.
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August 17, 2014 10:22:01 PM

I would go with the Nvidia 760 because its better than all the others and you will get better fps in games with your Intel processor
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a c 79 U Graphics card
a b À AMD
a b Î Nvidia
August 18, 2014 7:26:34 AM

JJames75 said:
I would go with the Nvidia 760 because its better than all the others and you will get better fps in games with your Intel processor


Oh no see I already know that the GTX 760 is the fastest and most powerful card I listed, but I'm not looking to upgrade. I am just wanting to compare my overclock and see how it compares to other cards.
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a c 79 U Graphics card
a b À AMD
a b Î Nvidia
August 18, 2014 7:43:59 AM

Gam3r01 said:
http://www.techpowerup.com/reviews/AMD/HD_7850_HD_7870/...
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_7...
http://www.techpowerup.com/reviews/MSI/R9_270X_Gaming/2...

Sadly you have to compare each in their own, as they were released at different times. First one is comparison between 7850 and 7870 era cards, next is nvidia cards such as the 760/770 to the 7870s, and last is comparison of R9 cards to the Nvidia cards of the second list.


Thanks I appreciate the review, but this is where I get confused on where to place it.
I first tried looking at the number of pixel shaders and do a rough calculation. They are both Pitcairn so I figured this would work but the results are off.
C(Number of Cores) x M(Mhz)=S (Speed calculated as Mhz performed by each core)
or
C x M = S

Radeon 7850
1024 x 1200 = 1228800

Radeon 7870
1280 x 1000 = 1280000

1228800/1280000=96%

This made me think it is almost equal, but then I looked at some benchmarks like the ones you listed.
In the first link the 7870 is around 13% faster than the 7850 when the 7870 is running at 1000Mhz and the 7850 is running at 860Mhz. However, taking my GPU to 1200Mhz gives me a 39.5% increase in GPU clock, and a 16.7% increase in vRAM clock which you would expect to give a minimum increase of about 17% assuming the rest of the system isn't bottlenecked which would make it faster than a 7870.


Seeing this I was confused on which way to look at it, so I went and found this review:
http://www.tomshardware.com/reviews/radeon-r9-280x-r9-2...

Their test system has faster RAM and faster CPU than mine does, and I had several programs open including a 3rd party FPS counter. I ran the same settings and resolution as they did and I came out with 53.09FPS overall average which sits me above the R9 270x even.

Thus I am confused.
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a c 1000 U Graphics card
a c 576 À AMD
a c 437 Î Nvidia
August 18, 2014 11:56:13 AM

Well a 7850 with a hefty OC such as yours can be stronger than a 7870. They are both the same base architecture, the 7870 simply runs at higher clock speeds, which your OC surpassed.
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a c 79 U Graphics card
a b À AMD
a b Î Nvidia
August 18, 2014 12:01:23 PM

Gam3r01 said:
Well a 7850 with a hefty OC such as yours can be stronger than a 7870. They are both the same base architecture, the 7870 simply runs at higher clock speeds, which your OC surpassed.


Well it also has an extra 256 stream processors and 16 TMUs and I forget how many ROPs. My OC is 200Mhz past its stock but all the information is conflicting so I'm not sure if I should consider it equal or better than a 7870 or R9 270x. Its hard to place.

I appreciate the help though.
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Best solution

a c 1000 U Graphics card
a c 576 À AMD
a c 437 Î Nvidia
August 18, 2014 12:05:33 PM

Its very hard to place cards that have been OCed, the best and seemingly only way is to have both cards, and test them yourself.
Many people said a 965 would bottleneck a 760 even at 4.6GHz, once I hit 4.0GHz the bottleneck was gone. Best way is to try it yourself sadly.
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a c 79 U Graphics card
a b À AMD
a b Î Nvidia
August 18, 2014 12:16:58 PM

Lol people always under estimating AMD. Those Phenom chips have quite a bit of age on them but CPUs haven't really out ran them by that much cause CPUs have only had marginal increases in performance since 2010 when Sandy Bridge came out. Intel's performance gap for some tasks is so big that it seems they don't even bother trying anymore, but when it comes to gaming the FX 8350 doesn't have too hard of a time beating an i5 CPU. Its not so surprising it can handle a GTX 760.

Anyways I suppose you are right and there won't be much way to know for sure no matter how much comparison of numbers I do without running one on my PC, and buying a new graphics card would kinda defeat the point. Besides it manages to run everything I have tried with all the settings maxed out by just turning off AA which doesn't even seem noticeable to me in image quality. Thanks again for your time.
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