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XDMA new AMD Crossfire technology

Lorien

Lorien

Supreme [H]ardness
Joined
Aug 19, 2004
Messages
5,197
No need for bridge connectors, no performance loss and it works with framepacing tech. Can't wait to see it tested.

1c6278ad-01af-4e62-ab8a-1d5ce1c44758.jpg
 
Is this confirmed to be on the new hawaii cards? It would seem so being that these slides appear to show Hawaiit GPU in them.

I hope so.. It will make for immediately better scaling, from the sound of it near 100% scaling up to the maximum cards allowed in a GPU array.
 
If everything AMD is promising turns out to be up to snuff, then they might finally win me back over...

Their drivers chased me away the first time; let's hope that's a thing of the past.

Yay for progress! :D
 
AMD is making me feel all warm inside. I get goose bumps just thinking about my future "Red Team" rig.
 
If mantle makes a video card 9 times faster I doubt there will be a need to crossfire
 
Did I miss something? Why would anyone be expecting near 100% Cf scaling, just from Mantle? Didn't see any specific references just to that.
 
runudownquick said:
Did I miss something? Why would anyone be expecting near 100% Cf scaling, just from Mantle? Didn't see any specific references just to that.
Click to expand...

Well, there are cases where you get close to 100% scaling today. So its certainly possible.
 
If this works with the 79xx series and actually works as advertised then they just made my next upgrade decision a no brainer for me.
 
tangoseal said:
from the sound of it near 100% scaling up to the maximum cards allowed in a GPU array.
Click to expand...

Where does it say anything about better scaling? Not arguing, I am planning on xfiring two new cards so would like to see all the details.
 
None of the 7000-series will have this because of what is mentioned in that slide-- "hardware DMA in the Crossfire compositing block".

In other words, the GPU needs to be built with it.

I would not be surprised it's only the R-series, even the 7000-series rebrands, that will be getting it. And, I'm sure there is more than enough spare bandwidth in PCI-Express 2.0 and 3.0 to allow non-ribbon cable Crossfire. When PCI-Express 4.0 comes out, there'll be much more than enough bandwidth available for this.
 
octoberasian said:
None of the 7000-series will have this because of what is mentioned in that slide-- "hardware DMA in the Crossfire compositing block".

In other words, the GPU needs to be built with it.

I would not be surprised it's only the R-series, even the 7000-series rebrands, that will be getting it. And, I'm sure there is more than enough spare bandwidth in PCI-Express 2.0 and 3.0 to allow non-ribbon cable Crossfire. When PCI-Express 4.0 comes out, there'll be much more than enough bandwidth available for this.
Click to expand...

There is already an excessive amount of bandwidth wasted in 3.0 x16 lanes.
 
jojo69 said:
hear hear
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Who the fuck has $3900 x 3 displays for your claimed setup?

I dont many who are going to shell out that kind of cash for a display array. I would rather buy twin turbos for my diesel truck, invest in stock, or better yet buy some guns to kill zombies with when the world ends.,

edit** wrong person quoted but you get the point cha cha
 
picket23 said:
Where does it say anything about better scaling? Not arguing, I am planning on xfiring two new cards so would like to see all the details.
Click to expand...

It doesn't but there is one key thing mentioned in the slides.... No external bridge latency penalties (paraphrased).

That is telling me to expect much better scaling as there wont be any lag from having bandwidth constraints due to the bridge cable. Its only an assumption and if you ask me a damned good, still speculative, but a damn good one. Right now on my 6990 I get about 95% scaling between the two GPU's. So yes its possible especially with a new tech driving the bridge rather than a physical method dependent upon limited lines of data bus in those little cheap flexible couplers.
 
tangoseal said:
Who the fuck has $3900 x 3 displays for your claimed setup?
Click to expand...

no one this year

maybe not next year either, but watch for [H] member VEGA near year's end

2015? my money says there will be several examples represented on this site
 
tangoseal said:
There is already an excessive amount of bandwidth wasted in 3.0 x16 lanes.
Click to expand...

Yup! And, I doubt PCI-E 4.0 would get saturated at all with 31.5 GB/sec in each direction on a 16-lane PCI-E slot. That's higher than HyperTransport (AMD) and Quick Path (Intel).
 
tangoseal said:
It doesn't but there is one key thing mentioned in the slides.... No external bridge latency penalties (paraphrased).

That is telling me to expect much better scaling as there wont be any lag from having bandwidth constraints due to the bridge cable. Its only an assumption and if you ask me a damned good, still speculative, but a damn good one. Right now on my 6990 I get about 95% scaling between the two GPU's. So yes its possible especially with a new tech driving the bridge rather than a physical method dependent upon limited lines of data bus in those little cheap flexible couplers.
Click to expand...

The only thing I can see on the slide above is where it states "no performance penalties versus external bridge"?
The way it is written there means that you don't lose performance when using this method compared to using an external bridge. Not that you gain performance. So even though there is no longer a dedicated bridge between cards, performance wont suffer.
I haven't seen other slides on it though so I am probably missing the one that everyone is basing the increased scaling thing off. Either way scaling seems good enough for me with most games on current gen cards, so as long as it doesn't worsen I am happy.
 
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Would this do anything special for HUMA sytems in the future like the ram from 2 cards stacking with the system memory? Example 4gb each video card (2 cards) + 8gb system memory = 16gb memory via HUMA?
 
tangoseal said:
Who the fuck has $3900 x 3 displays for your claimed setup?

I dont many who are going to shell out that kind of cash for a display array. I would rather buy twin turbos for my diesel truck, invest in stock, or better yet buy some guns to kill zombies with when the world ends.,

edit** wrong person quoted but you get the point cha cha
Click to expand...

2560x1440 displays can be had for $300-350
 
tangoseal said:
Who the fuck has $3900 x 3 displays for your claimed setup?

I dont many who are going to shell out that kind of cash for a display array. I would rather buy twin turbos for my diesel truck, invest in stock, or better yet buy some guns to kill zombies with when the world ends.,

edit** wrong person quoted but you get the point cha cha
Click to expand...

I would have gone with 3 30" 2560x1600 displays 3 years ago if video card technology was up to snuff. I bought a refurbed dell 3007 for $650 then and could have easily afforded a couple more. Now days you can still pick up 30" 2560x1600 monitors for around $800 new.

It's a very ignorant opinion on your behalf to think the rest of the world doesn't want something just because you don't or can't afford it.
 
Digital Viper-X- said:
Monoprice? Ebay? :) have been @ that price for over a year now. some even do 120hz.
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There's no way a NIB Dell 30" Ultrasharp (current generation) monitor is anywhere less than 900 on eBay.

You might be able to find a 30" two generations old for three or four hundred, but not NIB.
That's like saying I could find a 24" monitor for 50 bucks.....sure I could, but it would be a Dell 2407 from 2005.:eek:
 
magoo said:
There's no way a NIB Dell 30" Ultrasharp (current generation) monitor is anywhere less than 900 on eBay.

You might be able to find a 30" two generations old for three or four hundred, but not NIB.
That's like saying I could find a 24" monitor for 50 bucks.....sure I could, but it would be a Dell 2407 from 2005.:eek:
Click to expand...

He wasn't replying to your comment about the Dell 30" but the 2560x1440 monitors which are 27"...
 
magoo said:
There's no way a NIB Dell 30" Ultrasharp (current generation) monitor is anywhere less than 900 on eBay.

You might be able to find a 30" two generations old for three or four hundred, but not NIB.
That's like saying I could find a 24" monitor for 50 bucks.....sure I could, but it would be a Dell 2407 from 2005.:eek:
Click to expand...

I don't see where he said NIB Dell 30" Ultrasharp. All he said was 2560x1440 displays. There are plenty of those on ebay. They are 27" models.
 
magoo said:
There's no way a NIB Dell 30" Ultrasharp (current generation) monitor is anywhere less than 900 on eBay.

You might be able to find a 30" two generations old for three or four hundred, but not NIB.
That's like saying I could find a 24" monitor for 50 bucks.....sure I could, but it would be a Dell 2407 from 2005.:eek:
Click to expand...

I think you're a bit confused.

2560x1600 = 30" Dell/HP/etc...
2560x1440 = 27" which are available for around $300 on monoprice ebay etc.

=)
 
magoo said:
There's no way a NIB Dell 30" Ultrasharp (current generation) monitor is anywhere less than 900 on eBay.

You might be able to find a 30" two generations old for three or four hundred, but not NIB.
That's like saying I could find a 24" monitor for 50 bucks.....sure I could, but it would be a Dell 2407 from 2005.:eek:
Click to expand...

What everyone else said.

They are korean re-branded LG and Samsung 27" 2560x1440 displays. Beautiful looking monitors, especially the glossy ones.
 
tangoseal said:
Who the fuck has $3900 x 3 displays for your claimed setup?

I dont many who are going to shell out that kind of cash for a display array. I would rather buy twin turbos for my diesel truck, invest in stock, or better yet buy some guns to kill zombies with when the world ends.,

edit** wrong person quoted but you get the point cha cha
Click to expand...

Last I heard, this was [H]ard Forum, not oft Forum
 
tangoseal said:
There is already an excessive amount of bandwidth wasted in 3.0 x16 lanes.
Click to expand...

3.0's higher clockspeed still brings lower latency than 2.0. Bandwidth isn't the only factor. It's not a major increase (yet) but it's still an improvement over 2.0 today, and this tech will probably make the benefits of 3.0 a bit more apparent yet.
 
Bomber18 said:
I would have gone with 3 30" 2560x1600 displays 3 years ago if video card technology was up to snuff. I bought a refurbed dell 3007 for $650 then and could have easily afforded a couple more. Now days you can still pick up 30" 2560x1600 monitors for around $800 new.

It's a very ignorant opinion on your behalf to think the rest of the world doesn't want something just because you don't or can't afford it.
Click to expand...

I actually have 3 30" monitors right now and it's too fucking much screen. For simplicity sake and to be able to switch between green and red I ordered 3 27" dells to replace them. It's about 10% less pixels and should fit my desk a bit better. But since they match I'll be able to go back to using my gtx 690. Dell had 30% off on their refurbs last weekend so I got all 3 for 1300 shipped.

Also, when bringing up the topic of Korean knock off panels, good luck getting one that doesn't have issues. It's worth the extra hundred per screen just to get the ease of dealing with Dell if it has issues.
 
most of them dont have scalers either, so you are stuck at 1440 no matter what.

Also, per Thracks (Robert Hallock of AMD) They recomend 8x minimum for PCIe 3.0
 
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Will this create a way to unify gpus as one large monolithic one?
 
The Mac said:
most of them dont have scalers either, so you are stuck at 1440 no matter what.
Click to expand...
No you aren't, the gpu can scale for you.

veedubfreak said:
Also, when bringing up the topic of Korean knock off panels, good luck getting one that doesn't have issues.
Click to expand...
You don't need a lot of luck, you just need to not be very unlucky. The vast majority don't have any major issue. Just get a square trade warranty if you are concerned. Check the satisfaction levels of owners threads around the net.

veedubfreak said:
It's worth the extra hundred per screen just to get the ease of dealing with Dell if it has issues.
Click to expand...
I agree its worth it if you just want a monitor that runs at 60hz. Most people getting a Korean don't though. Dell can't help them out at all no matter how good their customer service may be.
 
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