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OpenCL, Direct Compute, CUDA & utilization
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OpenCL, Direct Compute, CUDA & utilization
10-23-2013, 09:17 PM
#1
NikuSama Offline
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So i'm looking at getting a middle of the road card for a shuttle computer I have that already plays most games in dolphin reasonably well at 1.5x to 2x IR with the onboard video, but of course it would be nice if it ran better. also some games just don't run well at all and I aim to fix those with a real video card. For instance Fortune Street just chugs no matter what I do, nothing speeds it up, its playable but not nice and that's the main reason i'm using this, so horribly long bouts of fortune street don't kill my system launch wii console
I'm going super cheap too, refurbs, I've had good luck so far and this isn't my main so it shouldn't be a problem. I'll just torture it when I get it but I have to ask....

I know theres an OpenCL option for offloading texture decoding to the GPU, that's cool and all but its still experimental. Should we expect that theres a possibility that it'll be ironed out and start helping out with performance of the emulator?
is there any possible support for CUDA or Direct Compute in the future for even more enhancements?
i'm stuck between 2 cards and the reason I ask is because if thers nothing planned beyond whats already there for openCL then i'll just get the 7750 refurb since it has 1gig DDR5, if theres plans for CUDA than of course i'll go nVidia and a GT 640 with 2gig DDR3, if theres direct computer than i'll stick with the 7750 because that's an amd thing. the cards are pretty even, the 640 has more core power and the 7750 has way more memory bandwidth and of course I could over clock either one as long as it doesent get too hot in that little box.

theres also a size restraint, single slot cards because the 16x slot is on the outer edge of the case. nothing that requires an external PSU supply because shuttle computers don't have large PSUs, this ones I think 300 peak and its already at 175 under load and you'll want headroom adding a card under full load wont leave much headroom, there will be some though...
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10-23-2013, 10:24 PM
#2
admin89 Offline
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It should be like this : GTX 650 vs Radeon R7 250 GDDR5 vs 7750 GDDR5 (close performance gap) > GT 640 . Yeah GT 640 isn't as fast as 7750 GDDR5 , not even close . GT 640 is on par with 7750 DDR3 . GDDR5 > DDR3
Choose GTX 650 or Radeon R7 250 GDDR5 or 7750 GDDR5 if you want to run game at 3xIR or higher (I recommend R7 250 GDDR5 since it's cheaper than GTX 650 and it's latest GPU from AMD )
Remember : GDDR5 is a whole lot faster than DDR3 . Do not choose DDR3 version
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10-24-2013, 11:18 AM (This post was last modified: 10-24-2013, 11:18 AM by NaturalViolence.)
#3
NaturalViolence Offline
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NikuSama Wrote:I know theres an OpenCL option for offloading texture decoding to the GPU, that's cool and all but its still experimental. Should we expect that theres a possibility that it'll be ironed out and start helping out with performance of the emulator?

No.

NikuSama Wrote:is there any possible support for CUDA or Direct Compute in the future for even more enhancements?

Highly unlikely. Especially Direct Compute. OpenCL would likely be a better choice than either of these for anywhere that general purpose GPU side optimization is needed.
"Normally if given a choice between doing something and nothing, I’d choose to do nothing. But I would do something if it helps someone else do nothing. I’d work all night if it meant nothing got done."  
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10-25-2013, 12:11 PM
#4
pauldacheez Offline
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The graphics devs plan to move texture decoding (and possibly any other VideoCommon stuff they can) over to utility shaders, which would basically be identical to what an ideal OpenCL implementation of this would be.
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10-25-2013, 07:34 PM
#5
NikuSama Offline
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alright I just thought I would ask because it would have had some bearing on what I bought. gonna wait a few more days and see what comes along open box and/or refurbed to jam into this teeny box

also the R7 250 costs more and I cant find a truly single slot cooler, the thing needs to be flat, plus when I can get an open box or refurbed 7750 for $30 to $40 bucks less and get more performance out of it than the R7 250 I think I am going to go that route. like I said before its a tiny case, I'm surprised it even has a 16x slot.

any way the only thing the R7 250 has over the 7750 is memory bandwidth...
73600 MB/sec on the R7 250 @1150Mhz
72000 MB/sec on the 7750 @ 1125Mhz

nothing a 25Mhz OC couldn't fix, plus 25Mhz is nothing to ddr5 ram I have noticed, will probably go much higher than that when I get something
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10-26-2013, 04:21 AM
#6
NaturalViolence Offline
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Just get the 7750. The difference is negligible.
"Normally if given a choice between doing something and nothing, I’d choose to do nothing. But I would do something if it helps someone else do nothing. I’d work all night if it meant nothing got done."  
-Ron Swanson

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-Mark Antony
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