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[Official] AMD R9 290X / 290 Owners Club - Page 2274

post #22731 of 43977
Quote:
Originally Posted by BradleyW View Post

Well think about it. Two cards rendering at the same time. Both cards slightly different from one another in terms of IC's, tracers, resistors, architectural differences and IC timings + clock speeds. The faster card will always wait for the slower card. That "could" slighty increase frame time latency.
CF is not exactly like that. It's actually is "two set of same shaders rendering at the same time". Please do some research about pipeline processing so that you could have better understanding about these stuffs.
Quote:
Originally Posted by Durvelle27 View Post

The 290 is to go along side with my 290X. Not willing to part with it just for 2x 290s tongue.gif
The performance is will be the same as 2x 290s. But the good thing is you can sell your 290 and get another 290x later thumb.gif
Edited by blue1512 - 5/16/14 at 7:46am
post #22732 of 43977
Quote:
Originally Posted by blue1512 View Post

Yes, the 2816 shaders of 290x are still there but only 2560 of them used when you put it in CF with a 290. That's how CF have been working for ages.
The cards can be set to different core/mem speeds separately, but that will lead to some serious latency and stuttering. The best way is mirror everything though.
This. Don't want to offend anybody, but it's interesting to see people giving so many opinions, but don't know this very basic stuff.
    
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post #22733 of 43977
Quote:
Originally Posted by blue1512 View Post

CF is not exactly like that. It's actually is "two set of same shaders rendering at the same time". Please do some research about pipeline processing so that you could have better understanding about these stuffs.
The performance is will be the same as 2x 290s. But the good thing is you can sell your 290 and get another 290x later thumb.gif

I'm trying to explain in an easier way. Of course I understand pipelines. I'm a Computer Science student. I believe you were meant to say "about this stuff".
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post #22734 of 43977
Quote:
Originally Posted by blue1512 View Post

CF is not exactly like that. It's actually is "two set of same shaders rendering at the same time". Please do some research about pipeline processing so that you could have better understanding about these stuffs.
The performance is will be the same as 2x 290s. But the good thing is you can sell your 290 and get another 290x later thumb.gif

Quote:
Originally Posted by hotrod717 View Post

This. Don't want to offend anybody, but it's interesting to see people giving so many opinions, but don't know this very basic stuff.

sorry to burst your bubbles(kind of) from hardocp review

"The big question is; do the two 1018MHz GPUs on the AMD Radeon R9 295X2 downclock to 1000MHz since our XFX Radeon R9 290X DD video card runs at 1000MHz? The answer is a big fat NO. Indeed, we checked in every game we tested and the two GPUs on the AMD Radeon R9 295X2 maintained a consistent 1018MHz clock speed while the XFX Radeon R9 290X DD maintained a consistent 1000MHz clock speed. This means each video card was running at its maximum performance. No throttling and no downclocking."

amd crossfire doesnt work like SLI, shaders might be lower but clock speeds are what they are.

http://www.hardocp.com/article/2014/05/13/amd_radeon_r9_295x2_xfx_290x_dd_trifire_review#.U3YmqvldWip
post #22735 of 43977
Quote:
Originally Posted by the9quad View Post


sorry to burst your bubbles(kind of) from hardocp review

"The big question is; do the two 1018MHz GPUs on the AMD Radeon R9 295X2 downclock to 1000MHz since our XFX Radeon R9 290X DD video card runs at 1000MHz? The answer is a big fat NO. Indeed, we checked in every game we tested and the two GPUs on the AMD Radeon R9 295X2 maintained a consistent 1018MHz clock speed while the XFX Radeon R9 290X DD maintained a consistent 1000MHz clock speed. This means each video card was running at its maximum performance. No throttling and no downclocking."

amd crossfire doesnt work like SLI, shaders might be lower but clock speeds are what they are.

http://www.hardocp.com/article/2014/05/13/amd_radeon_r9_295x2_xfx_290x_dd_trifire_review#.U3YmqvldWip

^ This

thats what i meant about it, 290 and 290x CF would be different though due to shaders, guess you could just clock the 290 higher to compensate?
 
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post #22736 of 43977
Quote:
Originally Posted by blue1512 View Post

CF is not exactly like that. It's actually is "two set of same shaders rendering at the same time". Please do some research about pipeline processing so that you could have better understanding about these stuffs.
The performance is will be the same as 2x 290s. But the good thing is you can sell your 290 and get another 290x later thumb.gif
Thats to much of hassle
 
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post #22737 of 43977
Quote:
Originally Posted by the9quad View Post


sorry to burst your bubbles(kind of) from hardocp review

"The big question is; do the two 1018MHz GPUs on the AMD Radeon R9 295X2 downclock to 1000MHz since our XFX Radeon R9 290X DD video card runs at 1000MHz? The answer is a big fat NO. Indeed, we checked in every game we tested and the two GPUs on the AMD Radeon R9 295X2 maintained a consistent 1018MHz clock speed while the XFX Radeon R9 290X DD maintained a consistent 1000MHz clock speed. This means each video card was running at its maximum performance. No throttling and no downclocking."

amd crossfire doesnt work like SLI, shaders might be lower but clock speeds are what they are.

http://www.hardocp.com/article/2014/05/13/amd_radeon_r9_295x2_xfx_290x_dd_trifire_review#.U3YmqvldWip
This doesn't even reference what I quoted. ???? Discussion was xfiring with 290/290X, not 295x2.
Edited by hotrod717 - 5/16/14 at 8:12am
    
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post #22738 of 43977
Quote:
Originally Posted by hotrod717 View Post

This doesn't even reference what I quoted. ???? Discussion was xfiring with 290/290X, not 295x2.

well I apologize, I didn't research your post (aka read it thoroughly). Just went all multi quote crazy! same principle applies though the core speeds and mem speeds stay what they are, the only difference is in the # of shaders being used. which is probably what you were saying.
Edited by the9quad - 5/16/14 at 8:18am
post #22739 of 43977
I'm using an R9 290X at the moment, which I purchased specially for my 4k [Samsung U28D590D] setup - but it won't even run BF4 at "Ultra" settings, generally I have to turn off MSAA to sustain anything above 50 fps. I would imagine grabbing another card and running them in CF would anal BF4.

Currently I have 2 [Samsung U28D590D], but I'm only running one (the other is setup with another rig).

I'm contemplating buying another and using three of them together.

My question is, should I buy another R9 290X and CF them for the triple (or even double, both @ 60 Hz) 4k setup? I will only ever be gaming using the 1 display, but having to run x2 displays at 30Hz using HDMI puts me off even for non-gaming use.


Thoughts? H4LP.
    
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post #22740 of 43977
Quote:
Originally Posted by Rozayz View Post

I'm using an R9 290X at the moment, which I purchased specially for my 4k [Samsung U28D590D] setup - but it won't even run BF4 at "Ultra" settings, generally I have to turn off MSAA to sustain anything above 50 fps. I would imagine grabbing another card and running them in CF would anal BF4.

Currently I have 2 [Samsung U28D590D], but I'm only running one (the other is setup with another rig).

I'm contemplating buying another and using three of them together.

My question is, should I buy another R9 290X and CF them for the triple (or even double, both @ 60 Hz) 4k setup? I will only ever be gaming using the 1 display, but having to run x2 displays at 30Hz using HDMI puts me off even for non-gaming use.


Thoughts? H4LP.

well no single card is going to push 4k @ 60 fps with ultra settings period. As you can see here the fastest single card (which is actually a double card) is getting 60 fps barely) So yeah your going to need to crossfire to hit 60 fps, and more than likely trifire (which is the sweet spot) to stay above it. Good news is used 290x's are cheap now.


Edited by the9quad - 5/16/14 at 8:45am
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