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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Dug - Wednesday, February 15, 2012 - link
For the cost of one game you could just get the nvidia 560. In fact you could of gotten it a long time ago and still be way ahead.beginner99 - Wednesday, February 15, 2012 - link
Well seeing this makes me feel a little less bad on how much a paid for my 5850 1.75 years ago. Absolutely 0 reason to upgrade...However now it seems AMD GPU division is starting to blunder too...
solarTermination - Wednesday, February 15, 2012 - link
I really don't understand what AMD is thinking here. The 7770 is preposterous at this performance/price level, and it boggles the mind that they designed it this way. I'm really stumped here, it's like they're spitting in all of our faces to release a card that has less performance and costs more than a widely available 2 year old part.They must take us for fools. Nothing else could explain this. Technology is supposed to improve as the years go by, not tread water, and certainly not get worse. You see this kind of bs and the revolving door of talent at AMD starts to make more sense. There must be some real pieces of work running that place.
I think it's finally time to join them. Nvidia, here i come.
CeriseCogburn - Saturday, March 10, 2012 - link
It's obvious isn't it ? They are a collapsing wreck that have culled with the ax their dwindling workforce as they've sold off assets to leave them with nothing but ip.Now after striking away Bain Capital style at the failing red bottom line - in the deep debt for endless years under the tightwad whining fan base and OCD focused complaint review sites meshing pennies and fps to an insane nuovo art form that should embarrass it's fans rather than fill them with false self esteem and self congratulating "I'm brilliant" mirror apprasials, they must further the save their life goal and actually ask their tenderly coddled and deceived rabid fan base to cough up some survival dollars...
Unfortunately, the years of low price bragging filled with lies albeit effectiveness as an ignorant fool lives in bliss, has come to backfire on them at the worst time possible, the end of the line.
As Mr. Smith said, it was inevitable.
Now amd needs a hero to save it's collapse and absorption into the wider market matrix.
shin0bi272 - Wednesday, February 15, 2012 - link
I have a gts250 and I get about the same fps as the 7750. I paid just over 100 bucks (109 IIRC) for it and its almost 3 years old and keeps up with these brand new cards. I cant decide if that's funny or sad.Menoetios - Wednesday, February 15, 2012 - link
While these cards definitely deserve flak for their starting prices, I'm not nearly as disappointed overall as many here seem to be. I have no doubt that their prices will come down in time. Consider that the 7750 is the absolute slowest GCN card. I fully expect to see a tastey sub-$90 price for the 7750s by the time Nvidia gets their 28nm line out. The 28nm process is still extremely supply constrained; it wouldn't make sense to price the cards out any lower to increase sales when there simply aren't any to sell. Whether Kepler trounces GCN or equals it, its introduction will be when the real shift in the price/performance shift occurs, both from competitive pricing as well as the 28nm ramp up.kmmatney - Wednesday, February 15, 2012 - link
Well, I'm glad I was able to pickup an HD6850 for $139 shipped (no rebates). I can see why the 7750 would be great for notebooks, but I don't see much point in this card for the desktop.CknSalad - Wednesday, February 15, 2012 - link
I think it's safe to say that ever since the release of bulldozer, AMD has been hit hard financially. They spent a lot of R&D and probably put all their eggs in one basket in that project. As much as their efforts can be admired, it seems that this has taken so much of AMD R&D money that now they don't have much to offer for even their gpu lineup.I understand that there is little competition and that this is the 'first gen' of 28nm cards, but there should seriously be at least 10-15% performance boost for the whole lineup. Going from 40nm to a 28nm process is a big jump. The 'there is little competition' so these cards are priced this way is still unacceptable. I'm starting to be wary of the 7800 series cards as I'm looking forward to buying a card no more than the low $300 range.
Hopefully Nvidia has something up their sleeves and can give us true 28nm performance we should be seeing. I am in no way an nvidia fanboy as I have had both ati and nvidia cards. The only thing i worry for nvidia's kepler cards is the power consumption. However, if the performance gain more than makes up for the minor increases in power consumption, then it will be more than worth it.
Sttm - Wednesday, February 15, 2012 - link
Yes they are price gouging for the next 3 months because they can. Also the 7700 series is complete shit performance wise and will only find its home in the hands of the uninformed and the low power systems built by Dell and HP.Nvidia is the only hope of seeing a good price/performance boost now.
Sttm - Wednesday, February 15, 2012 - link
"and at that point, this card at 159$ would make sense."No it wouldn't actually, since with the move to 28nm you should be seeing a performance increase per dollar not the same. The performance of a 6850 should be around $79 this generation, with the $160 cards offering almost 6950/560ti level of performance.
This is what Nvidia will most probably be offering with their next gen parts, and what AMD will have to lower their costs to if they expect anyone outside of the fanboys to but them.