If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
Faster CUDA performance ??
Paul wrote:
Smarty wrote: Phat_Jethro wrote: On 6/1/2010 2:53 PM, Smarty wrote: snip Thanks Paul and Jim for your insightful comments. I share Paul's concern about making a steep investment with no assurance of a productivity pay-off. My ONLY motive for replacing this video card with an expensive alternative is to get a big boost in rendering speed, and I would be extremely unhappy if that did not pan out. I also have the issue which Jim raises to deal with. My power supply is the smaller "standard" supply Dell offered in this XPS420. They had an optional 750 watt supply (I think it was 750) but the smaller supply I purchased which is either 400 or 500 watts does not have a lot of spare capacity left. I have 3 hard drives, 2 optical drives, a couple PCI and PCI-E cards, along with the QX9650, RAM, etc. I suspect I have a hundred watts to spare at most, but had not considered the extra power supply load and inevitable heating at all. I'm going to do a bit more research and see what if any info I can get from Pegasys, the authors of TMPGExpress, the program I most often used to transcode, render, and filter. Thanks once again. Smarty The age of the PSU makes a difference as well as they lose some capacity over time. I started with a new 550W 3 years ago. It was fine in my system with E6600, 2Gb RAM, 2 HDD's and 2 optical with 8800GTS. 3 years later with upgrades to a E8500, 4Gb RAM. 4 HDD's. Now the PSU starts the Insta-shutoff "feature" when running 3D games. 700W PSU fixed that issue. J Not entirely surprising. Electrolytic caps used for filtering lose some of their capacitance. Heat sinks and diode bridges and other components get loaded with dust and dirt, raising their temperatures, and then causing some thermal safeguards to kick in sooner. Thanks for the warning! "Utilize NVIDIA CUDA For Filtering and Decoding" http://tmpgenc.pegasys-inc.com/en/pr..._new.html#cuda It would appear the main advantage comes from some "sharpen" operations done in CUDA. Otherwise, it is hard to say what exactly CUDA buys. And the word Encoding is not associated with CUDA. They do have a SPURS plugin, which would use a Cell based accelerator card, for encoding. ******* On another encoder software page for a different product, they claimed to be doing encoding with CUDA, but the only performance metric was something like "Up to 50% better performance" with no references to hardware used at all (i.e. indicating which processor and which video card are being compared). I guess you're supposed to fill your computer with various odds and ends, to get acceleration :-) Paul I think your assessment is correct Paul, but not complete, since CUDA does accelerate encoding in some software (such as Cyberlink Power Director, Cyberlink PowerProducer, Badaboom, and others) as well as speeds up filtering in some of the 18 filters provided by TMPGExpress including the Sharpen function (which I use often). The Spurs Engine boards from Leadtek (and the Firecoder Blu, a very similar if not identical board from GrassValley / Edius) also make legitimate claims to speed up rendering / transcoding,to and from mpeg2 to mpeg4/AVC, a function I also use a lot. As you may imagine, these functions are painfully slow even with a quadcore, and those of us who do it a lot are seeking acceleration solutions both software and hardware-based. For the time being, I am going to avoid the extra expense of a new nVidia board. Although it appears that the power supply load (only) increases from about 70 watts to about 106 watts by switching from my current 8800GT to a very high performance new, faster board, the cost is quite prohibitive. Matrox has yet another acceleration hardware product, and I want to do a little more research before making any big purchases, since the choices are not only pricey but also very limited in terms of their supported formats and profiles, often leading the result that certain formats are highly accelerated but others are unavailable. This appears to be especially true for the type of work I do here, 1920 by 1080 AVC. Thanks again for the help and inputs and suggestions! |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
CUDA on Debian | Merciadri Luca | Nvidia Videocards | 2 | August 29th 09 07:02 PM |
CUDA ? | johns | Nvidia Videocards | 8 | December 3rd 08 05:48 PM |
Anyone here using CUDA yet? | heycarnut | Nvidia Videocards | 0 | January 23rd 07 01:56 AM |
Faster RAM or Lower CAS, which gives more performance? | Harry Muscle | Overclocking AMD Processors | 6 | August 20th 03 03:29 PM |
Faster RAM or Lower CAS, which gives more performance? | Harry Muscle | Asus Motherboards | 6 | August 20th 03 03:29 PM |