Radeon 7750 good for MadVR/4k? Should I wait? - AVS Forum
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post #1 of 4 Old 02-28-2013, 12:42 AM - Thread Starter
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Is the 7750 the best price/performance card for madVR if I wanted to stick with AMD, or is the 8 series coming out soon? I want to build a new HTPC and was thinking of buying a Pentium G2020 (Ivy Bridge) and a Radeon 7750... would this be enough for 4K/24p? I would like it to be futureproof. My current system (Radeon 5570 and Athlon II 250) is showing its age with the new settings in madVR.
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post #2 of 4 Old 02-28-2013, 01:35 AM
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If you are interested in only movies, HD 6570 is enough (supports the highest settings). If you also play videos, HD 7770 is the minimum for the highest settings. (7770 is roughly 1.5 times better than 7750.) Playing SD/HD/FHD contents in 720p/768p/1080p displays, of course.

4K has two meanings:

1. Play SD/HD/FHD contents in a 4K UHD display. Upscaling them with the highest settings (x5.33, x3, x2) is very demanding.
1a. SD/HD/FHD movies: HD 7770 is good for the highest settings.
1b. SD/HD/FHD videos: HD 7970 is necessary for the highest settings. HD 7770 is good for Lanczos3+AR.

2. Play 4K contents in a 4K UHD display. Two points of consideration:
2a. Decoding AVC = H.264 is easy for Pentium IVB (because of Intel Quick Sync). Decoding HEVC = H.265 could be hard. You might want to have a real quad-core processor (i.e. Core i5) for future proof.
2b. If the resolution of the content is identical with that of the display, then only chroma upscaling is necessary, that is easy for a decent GPU. However, if the former is larger than the latter (e.g. 4096 × 2304 > 3840x2160), then downscaling is necessary and the highest Catmull-Rom+AR+LL is demanding.

So, Core i5 and HD 7970 (best upscaling for movies/videos) or HD 7770 (best upscaling for movies, medium upscaling for videos) are recommended for 4K.

HD 8000 series may not come until 2014 (source).



But Fudzilla says, New AMD desktop cards in 2H 2013. I don't know which is true.
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post #3 of 4 Old 02-28-2013, 02:00 AM - Thread Starter
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Thanks a lot.

Ok, so a 7770 is the minimum for scaling SD/HD/FHD movies to a 4K display using the highest settings, meaning Jinc+AR for both chroma/image scaling and FRC enabled? What if I just use Spline+AR for image scaling, softcubic with no AR for chroma and have FRC on... would a 7750 suffice to scale that to 4K? I'm only interested in movies... I have no interlaced stuff or videos... just movies.

And is a fast processor necessary for scaling SD/HD/FHD to 4k? I thought that a fast GPU is only needed for that? Or did you recommend a true quad-core for 4k content?

4K decoding will probably become standard on AMD GPUs eventually, right? Seems like it would cost more than I'm wanting to spend to make a futureproof rig that will play 4K content. Maybe I should just wait.
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post #4 of 4 Old 02-28-2013, 02:06 AM
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Yes. 7750 is enough to upscale SD/HD/FHD movies/videos to 4K UHD with Bicubic75+AR/Lanczos3+AR. (Spline36 is almost the same as Lanczos3.)

HEVC hardware decoder will be implemented in future graphics cards. But I don't known when.
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