AMD Radeon HD 7750 & Radeon HD 7770 GHz Edition Review: Evading The Price/Performance Curve
by Ryan Smith & Ganesh T S on February 15, 2012 12:01 AM EST- Posted in
- GPUs
- AMD
- HTPC
- GCN
- Radeon HD 7000
Video Post-Processing: GPU Loading
We saw in our coverage of discrete HTPC GPUs last year that noise reduction loaded up the GPU, and as such, was even disabled in the low end GPUs for want of shader resources. Starting with this review, we are planning to tabulate GPU usage under various post processing scenarios instead of running decoder benchmarks. GPU-Z gives us the necessary data for this purpose.
A 1080i60 H.264 clip (same as the one used in the discrete HTPC GPU article last year) was decoded with the LAV Video Decoder (DXVA2 Copy-Back mode) using EVR-CP as a renderer in GraphStudio Next's Decoder Performance section. Various post-processing options were turned on and off in CCC and the GPU usage recorded in each case.
| Video Post Processing GPU Usage: 1080i60 H.264 | |
| AMD Radeon HD 7750 (1GB GDDR5) / Catalyst 12.1 | |
| LAV Video Decoder DXVA2 (Copy-Back) v0.46 / EVR-CP | |
| Post Processing Algorithm | GPU Load |
| No Video Post Processing | 19% |
| Vector Adaptive Deinterlacing + Pulldown Detection | 25% |
| Edge Enhancement | 22% |
| Noise Reduction | 48% |
| Dynamic Contrast and Colour | 25% |
| All Post Processing / 'Enforce Smooth Video Playback' Disabled | 62% |
We also put some Full SBS / Full TAB 3D clips (which are basically 2 x HD resolution) through the same process. Those progressive clips resulted in around 70% of the GPU being loaded with all the post processing steps enabled.
It is not yet possible to use the madVR renderer from within GraphStudio Next, but, in future HTPC / HTPC GPU reviews, you can expect to find similar benchmarking with the madVR renderer (now that it is possible to use madVR along with hardware accelerated decode for AMD GPUs also). That said, we see that up to 62% of the GPU is loaded using just EVR-CP. It is not clear how much room is left for madVR processing, and we hope to address that question in future reviews.
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chizow - Sunday, February 19, 2012 - link
Those who do not learn from history are doomed to repeat it.There's a reason we look at the past, because chances are, what's already in your rig performs the same or better than what AMD is trying to sell you at the same or higher price than what you paid "in the past".
Everyone needs to set the bar for themselves in terms of what they are willing to pay for an "upgrade", and given there is negative scaling with these parts, its pretty obvious they fail on all fronts. But hey, even you acknowledge this.
Galidou - Tuesday, February 21, 2012 - link
Those with a choosen side should not try to explain whatever the history tells us because they have a biased opinion. They can't see both side of the medal as objectively possible as someone with an impartial view and form the beginning you've proven to be on nvidia's side.End of the discussion, you can try to explain history but it's YOUR perception. I never said history wasn't worthy of anything the thing is you always are on the same side which means it's worthless from the very beginning.
Galidou - Tuesday, February 21, 2012 - link
I do not think it's a TOTAL fail, the 7970 and 7950 isn'T very well priced, but it's not a fail like those. From your point of view a fail is from historical pricing. From my point of view and ALWAYS was like that, it's from a performance/price standpoint and I won't change because you tell me we should look at everything things from the past. Sure we can learn from it.There was once a man that beleived the earth was round. But the historians and everyone else beleive it was flat so they killed him. No need to put names in there... History used as an argument makes that sometimes.... You've got to renew your point of view else, you can't see further from what you know.
AMD is trying to sell you at the same or higher price than what you paid "in the past".
Like we said before, nothing new here, it's always the same with x2 parts from last gen for years now... And it's only an example from many others of rebranding older designs selling at higher price point which AMD and Nvidia are both strong at.
Galidou - Sunday, February 19, 2012 - link
The price is a failure from my perception, 7770 and 7750 is a big fail..... Unlike 7950 and 7970 non-attractive price/performance but still a little justified by it's performance compared to parts that are out NOW and not compared to freaking history of pricing or future video cards...People out there will buy the 7770 and they'll be totally satisfied for as long as they'll own the thing. If you spent 4 hours on the internet looking at video card prices and benchmarks and realize you're way better off with a 6850 you might find it a bargain. But for others, if you tell them what you did to get to that conclusion, they'll maybe end up being happy with their choice without searching because they had 4 hours of playtime outside on a sunny day and that's worth it, while you're on the computer looking to spend your money on the best you can find.
So in the end, whatever we might say, perception is the key in life, we can take a whole day speaking about that and in the end, everyone will be right, because each of us create it's reality by thinking and seeing it the way THEY want... You want to live in the past and the future analyzing everything, you'll end up loosing the present which is the only thing that exists...
chizow - Sunday, February 19, 2012 - link
Yes Rarson, its proof stupid people have low standards and will buy anything. How's your 7700 treating you?Plenty in stock actually: http://www.newegg.com/Product/ProductList.aspx?Sub...