Quote: Since this card looks so promising I read some of the reviews and some of them indicate that 4K might be pushing it, if I read that correctly.

I think you read about playing a 3D game at 4K, that's different part of the chip. The hardware encoder and decoder that Kepler and Maxwell have are separate bits inside of the chip, those don't use the computing cores.

Update: Looks like it'll be a feature in PDR14
Dafydd

Oh, nooo.... more money!

Oh, well

Quote:

Quote: Thank you both for the answers.

Since this card looks so promising I read some of the reviews and some of them indicate that 4K might be pushing it, if I read that correctly. The max resolution spec is about the same as the GT640.

The max resolution on the GT640 is 4096x2160, ie. 4K, but that will be only at 30fps since that card only supports HDMI 1.x .
The max resolution on the GTX 960 is is 5120x3200 - not "about the same" as the GT 640, but much higher. That's when using dual DisplayPort connectors, also. I'm not aware of any 5120x3200 displays yet, though. One can only hope

I found this interesting reading:


http://www.enthusiastpc.net/articles/00003/3.aspx


That would be 8GB/sec only versus 16 GB for PCIE 3. That ought to be more than fast enough.

Yes. But I am not sure under what circumstances the higher PCIE3 speed will make a difference.
4096x2160x3x60 amounts to 1.48 GB/s . That means even a PCIE1 bus has enough bandwidth for encoding 4K in realtime.
The bus would only become a bottleneck if the encoder on the card is capable of higher encoding speeds.
At PCIE2 you have 8GB/s which would allow for 5x encoding . I don't think the hardware encoder really goes that fast.
Even if it does, you are likely be limited by other things than the bus, like the speed of effect processing in the software.

For decoding, it works in reverse. There is no issue with sending compressed data over PCIE, since it's relatively small. The bottleneck may be sending the decoded data from the video card back to the host. At that point you may be limited by the PCIE bus, ie. limited to 5x decoding.

I have rarely seen projects encode at faster than 2x speeds. And those would be HD projects. 4K projects usually take much longer - they encode at less than 1x - the bottleneck is probably my 750Ti card's encoding speed, not the PCIE bus speed.
And that's with H.264, not HEVC .

Julien,
that was most enlightening and it was the kind of news I like to hear. I do not like hardware encoding, to my eyes the video has too many artifacts compared to letting the CPU doing it.

But I like to get the HDMI 2 port and the extra margin for possible 60P. After reading more reviews still not convinced . Do not care about HEVC but may have to when BR appears.

The GT640 will have to do until I get more inputs.

But even that inexpensive card has good margins when outputting 4K Mp4 264.
(Most likely a totally different picture when gaming.)

-------------------------------4K------------------- 2K------------------------ Available
GPU Core Clock................326 Mhz................324 Mhz..........................902 Mhz
GPU Mem Clock................445 Mhz................162 Mhz..........................891 Mhz
GPU Memory used............365 MB..................250 MB...........................2048 MB
GPU Load........................36%...................... 24%
Video Engine Load=0%

So if I read this correctly clock speed is the important factor, memory much less so.


I am trying to learn more about GPUs, in the past I just bought a recommended one and that was that. Now I like to more or less know what is going on.

PD14 will most likely not be available until Fall.


Thanks for the inputs.

73s, WA6JZN ex DL9GC
CYBERLINK PLEASE ADD UHD BLU RAY BURNING SOFTWARE
PD14,
Win10,64bit.CPU i7 6700,16GB ,C= 480 GB SSD ,GPU GTX1060 6GB 1 fan. Plus 3 int, 4 ext HDD's for video etc.LG WH16NS40 reads UHD.
4K 24" ViewSonic monitor.Camera Sony FDR-A

I got my card installed today. Finally I have 4k hardware accelerated encoding, even if only for h264.

congratulations.

Do you have 4K viewing capability?

If so can you provide some numbers?

Eugene
73s, WA6JZN ex DL9GC
CYBERLINK PLEASE ADD UHD BLU RAY BURNING SOFTWARE
PD14,
Win10,64bit.CPU i7 6700,16GB ,C= 480 GB SSD ,GPU GTX1060 6GB 1 fan. Plus 3 int, 4 ext HDD's for video etc.LG WH16NS40 reads UHD.
4K 24" ViewSonic monitor.Camera Sony FDR-A

I did my "standard" rendering project - output at 1080p60.
I did get a time of 1:12 min with the usage like in the attachment (NVENC encoding). Usage was so low that the card fan didn't even started during this.
PD13 CPU usage was at 12% and memory use at 1.2GB. Disk usage was a lowly 7MB/s (I have a RAID area that can "push" 300MB/s).

Previous results where 1:14 min with Radeon HD7979 (Gigahertz Edition), 1:28 min with GTX 480 modded (in Quadro 6000) - CUDA encoding and 1:30 min with GTS450 (modded in Quadro 2000) - again CUDA encoding.

So, like I already stated in other thread, I think that the real bottleneck is the inefficient use of processing resources.

Thanks for the data.

One of the real problem with PD13 and others before it, is the slow generation of Shadow Files.

Editing, say 30 min of video, in HD and for sure in UHD 4K cannot realistically be done without the use of proxy files, Shadow Files.

Because their generation is so agonizingly slow it appears that not all resources are being used.

According to other members this has been the case for a long time.

By comparison using external converters can be 5 to 10 times faster when choosing the fast mode.

Is your card helping in this area?

Eugene 73s, WA6JZN ex DL9GC
CYBERLINK PLEASE ADD UHD BLU RAY BURNING SOFTWARE
PD14,
Win10,64bit.CPU i7 6700,16GB ,C= 480 GB SSD ,GPU GTX1060 6GB 1 fan. Plus 3 int, 4 ext HDD's for video etc.LG WH16NS40 reads UHD.
4K 24" ViewSonic monitor.Camera Sony FDR-A

My thought process is that hopefully at the next PD14, they will use the integral decoder and get rid of the need for shadow files for 4K material.

Quote: I got my card installed today. Finally I have 4k hardware accelerated encoding, even if only for h264.

congrats.
will be waiting for more goodies for sure...

now I've been reading that GTX 970Ti's got installed memory issues like only using 3.5GB mem.
and
we gotta wait for the PD14! 'no bridge too far'

Yashica Electro 8 LD-6 Super 8mm
Asrock TaiChi X470, AMD R7 2700X, W7P 64, MSI GTX1060 6GB, Corsair 16GB/RAM
Dell XPS L702X i7-2860QM, W7P / W10P 64, Intel HD3000/nVidia GT 550M 1GB, Micron 16GB/RAM
Samsung Galaxy Note3/NX1

Sonic 67


What time did you get using CPU rendering only?

And what GPU numbers do you get when editing and playing in the pre view window?

Thanks

Eugene 73s, WA6JZN ex DL9GC
CYBERLINK PLEASE ADD UHD BLU RAY BURNING SOFTWARE
PD14,
Win10,64bit.CPU i7 6700,16GB ,C= 480 GB SSD ,GPU GTX1060 6GB 1 fan. Plus 3 int, 4 ext HDD's for video etc.LG WH16NS40 reads UHD.
4K 24" ViewSonic monitor.Camera Sony FDR-A

My previous nVidia cards were from Fermi generation so didn't help preview at 4K. Then I had an ATI HD7979 and it was better.
However, my 4K experience for now are just tests, not real edits. A cellphone video is not proper 4k source and I don't have the funds to switch all over to 4k
I stopped at 1080p 3D with my TV. For now.