AMD HD7*** series info

[AtenRa]

Some rumors (Charlie) have it that there are samples in the field now with near 6990 performance on HPL. Maybe 28nm HPL is all AMD needs? FWIU 28nm HPL can run up to ~1GHz. If GCN still runs 1/1 GPU to shader clocks (or whatever they will call them on GCN) then it's possible 28nm HPL is fast enough. If so, I'll be curious to see what AMD does when 28nm HP comes out. Depending, of course on what clocks it can actually run and how much power it uses.

Anyway, I suppose we should wait to see what they release this year first on 28nm HPL, before we start to speculate on next year and 28nm HP.

I dont believe AMD and NV will use TSMC's 28nm HPL for the mid-high end cards.

 

[3DVagabond]

I dont believe AMD and NV will use TSMC's 28nm HPL for the mid-high end cards.

Well, it looks like nVidia's not going to. I would guess that's why they aren't releasing anything this year. AMD, on the other hand, are saying they will release cards this year. Are you thinking that they won't? Or, do you think it's just going to be lower end cards?

 

[AtenRa]

All im saying is that TSMC's 28nm HPL is not suitable for high performance GPUs and i dont believe AMD will use it for graphics cards.

Now that i thing about it, perhaps TSMC's 28nm HPL its better for mobile cards, but again i cant say for sure if they will use it.

 

[Grooveriding]

Well, it looks like nVidia's not going to. I would guess that's why they aren't releasing anything this year. AMD, on the other hand, are saying they will release cards this year. Are you thinking that they won't? Or, do you think it's just going to be lower end cards?

AMD is also using Global Foundries for their 28nm GPUs they may well be using them to produce whatever it is they are releasing this year.

 

[3DVagabond]

AMD is also using Global Foundries for their 28nm GPUs they may well be using them to produce whatever it is they are releasing this year.

I was under the impression it's all TSMC this round. I might have heard wrong though. There's so many rumors.

 

[Saico]

AMD Radeon HD 7000 Southern Islands 28nm
　　HD 7990 New Zealand GCN
　　HD 7970 Tahiti XT GCN 1000MHz 32CUs 2048ALUs 128TMUs 64ROPs 256bit XDR2 8.0Gbps 256GB/s 2GB 190W HP
　　HD 7950 Tahiti Pro GCN 900MHz 30CUs 1920ALUs 120TMUs 64ROPs 256bit XDR2 7.2Gbps 230GB/s 2GB 150W HP
　　HD 7870 Thames XT VLIW4 950MHz 24SIMDs 1536ALUs 96TMUs 32ROPs 256bit GDDR5 5.8Gbps 186GB/s 2GB 120W HPL
　　HD 7850 Thames Pro VLIW4 850MHz 22SIMDs 1408ALUs 88TMUs 32ROPs 256bit GDDR5 5.2Gbps 166GB/s 2GB 90W HPL
　　HD 7670 Lombok XT VLIW4 900MHz 12SIMDs 768ALUs 48TMUs 16ROPs 128bit GDDR5 5.0Gbps 80GB/s 1GB 60W HPL
　　HD 7570 Lombok Pro VLIW4 750MHz 12SIMDs 768ALUs 48TMUs 16ROPs 128bit GDDR5 4.0Gbps 64GB/s 1GB 50W HPL

Rumours from http://bbs.expreview.com/thread-46257-1-1.html

 

[badb0y]

AMD Radeon HD 7000 Southern Islands 28nm
　　HD 7990 New Zealand GCN
　　HD 7970 Tahiti XT GCN 1000MHz 32CUs 2048ALUs 128TMUs 64ROPs 256bit XDR2 8.0Gbps 256GB/s 2GB 190W HP
　　HD 7950 Tahiti Pro GCN 900MHz 30CUs 1920ALUs 120TMUs 64ROPs 256bit XDR2 7.2Gbps 230GB/s 2GB 150W HP
　　HD 7870 Thames XT VLIW4 950MHz 24SIMDs 1536ALUs 96TMUs 32ROPs 256bit GDDR5 5.8Gbps 186GB/s 2GB 120W HPL
　　HD 7850 Thames Pro VLIW4 850MHz 22SIMDs 1408ALUs 88TMUs 32ROPs 256bit GDDR5 5.2Gbps 166GB/s 2GB 90W HPL
　　HD 7670 Lombok XT VLIW4 900MHz 12SIMDs 768ALUs 48TMUs 16ROPs 128bit GDDR5 5.0Gbps 80GB/s 1GB 60W HPL
　　HD 7570 Lombok Pro VLIW4 750MHz 12SIMDs 768ALUs 48TMUs 16ROPs 128bit GDDR5 4.0Gbps 64GB/s 1GB 50W HPL

Rumours from http://bbs.expreview.com/thread-46257-1-1.html

I'll get the hype train started....

 

[Spikesoldier]

AMD Radeon HD 7000 Southern Islands 28nm
　　HD 7990 New Zealand GCN
　　HD 7970 Tahiti XT GCN 1000MHz 32CUs 2048ALUs 128TMUs 64ROPs 256bit XDR2 8.0Gbps 256GB/s 2GB 190W HP
　　HD 7950 Tahiti Pro GCN 900MHz 30CUs 1920ALUs 120TMUs 64ROPs 256bit XDR2 7.2Gbps 230GB/s 2GB 150W HP
　　HD 7870 Thames XT VLIW4 950MHz 24SIMDs 1536ALUs 96TMUs 32ROPs 256bit GDDR5 5.8Gbps 186GB/s 2GB 120W HPL
　　HD 7850 Thames Pro VLIW4 850MHz 22SIMDs 1408ALUs 88TMUs 32ROPs 256bit GDDR5 5.2Gbps 166GB/s 2GB 90W HPL
　　HD 7670 Lombok XT VLIW4 900MHz 12SIMDs 768ALUs 48TMUs 16ROPs 128bit GDDR5 5.0Gbps 80GB/s 1GB 60W HPL
　　HD 7570 Lombok Pro VLIW4 750MHz 12SIMDs 768ALUs 48TMUs 16ROPs 128bit GDDR5 4.0Gbps 64GB/s 1GB 50W HPL

Rumours from http://bbs.expreview.com/thread-46257-1-1.html

means nothing until we see benchies

 

[happy medium]

Looks like the 7870 is about= to a 6970?
7970 looks about 25% slower than a 6990?

edit:
only 2gb of memory? This cant be right.

 

[Saico]

Yes, we should take these rumours with a grain of salt, but hey, this is the first "chinese leak". They usually pop-up within a month before the launch date.

 

[dawp]

I don't think you can trademark numbers, so unless they call it GeForce or GTX, they're fine. Besides, nVidia already did it too then, remember 9800 GTX vs ATI 9800 Pro...

Yup. intel tried that with the 80486 and got slapped down by the courts. That is why the Pentium wasn't named the 80586.

 

[Skurge]

Looks like the 7870 is about= to a 6970?
7970 looks about 25% slower than a 6990?

edit:
only 2gb of memory? This cant be right.

The 7870 is really intersting.. It's got higher clocks and more bandwidth than the 6970 and will probably have other tweaks and uses almost 100W less.

 

[Grooveriding]

Yes, we should take these rumours with a grain of salt, but hey, this is the first "chinese leak". They usually pop-up within a month before the launch date.

True enough. If accurate looks like AMD could be using Global Foundries for the 7870 on down and TSMC for the 7990/70/50.

Likely the 7870 will come first then. Will be quite the card if AMD is all alone on 28nm with a cheap card that has 40nm single-gpu crown performance.

 

[happy medium]

True enough. If accurate looks like AMD could be using Global Foundries for the 7870 on down and TSMC for the 7990/70/50.

Likely the 7870 will come first then. Will be quite the card if AMD is all alone on 28nm with a cheap card that has 40nm single-gpu crown performance.

I missed that part, where did you get that imppression?

 

[dangerman1337]

Assuming this is true Tahiti looks a bit disappointing it's the only one using ('side from New Zealand which will be just two Tahiti GPUs) it's using XDR2 and GCN interestingly. I wonder how big the die size is going to be and how the performance is going to be.

 

[timma]

PCI-E 3.0 and TSMC 28nm:sneaky:

 

[Arkadrel]

AMD Radeon HD 7000 Southern Islands 28nm
　　HD 7990 New Zealand GCN
　　HD 7970 Tahiti XT GCN 1000MHz 32CUs 2048ALUs 128TMUs 64ROPs 256bit XDR2 8.0Gbps 256GB/s 2GB 190W HP
　　HD 7950 Tahiti Pro GCN 900MHz 30CUs 1920ALUs 120TMUs 64ROPs 256bit XDR2 7.2Gbps 230GB/s 2GB 150W HP
　　HD 7870 Thames XT VLIW4 950MHz 24SIMDs 1536ALUs 96TMUs 32ROPs 256bit GDDR5 5.8Gbps 186GB/s 2GB 120W HPL
　　HD 7850 Thames Pro VLIW4 850MHz 22SIMDs 1408ALUs 88TMUs 32ROPs 256bit GDDR5 5.2Gbps 166GB/s 2GB 90W HPL
　　HD 7670 Lombok XT VLIW4 900MHz 12SIMDs 768ALUs 48TMUs 16ROPs 128bit GDDR5 5.0Gbps 80GB/s 1GB 60W HPL
　　HD 7570 Lombok Pro VLIW4 750MHz 12SIMDs 768ALUs 48TMUs 16ROPs 128bit GDDR5 4.0Gbps 64GB/s 1GB 50W HPL

Rumours from http://bbs.expreview.com/thread-46257-1-1.html

If true....


5770:
16 ROPs, 40 TMUs, 800 ALUs, 76GB/s bandwidth. 108watts TPD.

7670:
16 ROPs, 48 TMUs, 768 ALUs, 80GB/s bandwidth. 60watt TPD.


Sooo.... ~15-20% ish faster?, and uses 80% LESS power.
Lets say it runs like a Geforce 460 768mb (those use 150watts+ TPD).
This thing will be about 3 times as power effecient.

'
Nvidia will need to release a new card too (in the 460 perf. range, on 28nm), or lose alot of the low end, that OEMs go for.


7870:
Looks to be a improved 6970, again maybe ~15% performance gain on it.

6% more memory bandwidth, and 8% higher GPU clocks, will probably put this slightly ahead of the 580.

580 uses like 250watts TPD.....
this 7870, will be a 120w TPD card (less than half the power usage), and be faster.



7970:
GCN... will be intresting to see what that does.
XDR2 and at 8.0 Gbps is very interesting, as is the 256bit controller they choose to stick with.
That probably means die size wont be huge because of a wider memory controller.

 

[Plimogz]

Looks like the 7870 is about= to a 6970?
7970 looks about 25% slower than a 6990?

edit:
only 2gb of memory? This cant be right.

2 GB of memory seems quite enough for this round of cards. I'm surprised that this amount would appear insufficient to you.

 

[CFP]

If the 7870 is a slight improvement over the 6970, we're looking at GTX580 performance levels, aren't we?

Wow. Interesting to see how the 7970 pans out.

 

[Arkadrel]

If the 7870 is a slight improvement over the 6970, we're looking at GTX580 performance levels, aren't we?

Wow. Interesting to see how the 7970 pans out.

It looks that way to me.

7870 > 580 by ~5% (stock ref. vs stock ref.).

7970:
GCN
45% more memory bandwidth than a 6970.
33.3% more ALU's/TMU's than a 6970.
100% more ROPs than a 6970.

I think we re gonna see ~50% gains on a 6970 atleast.
Which might put the 7970 around 40% or so ahead of a 580.

 

[AtenRa]

and uses 80% LESS power.

~44% less power

 

[Arkadrel]

AtenRa isnt going from 60watts -> 108watts a 80% differnce?
60 x 1.80 (80% extra) = 108watts.

Ahh yeah... maybe its the wording, would it have been correct if instead I said, that the 5770 uses 80% more power than the 7670?

 

[AtenRa]

yes,
it is 7670 uses 44% less power than 5770 or 5770 uses 80% more power than 7670

 

[CFP]

It looks that way to me.

7870 > 580 by ~5% (stock ref. vs stock ref.).

7970:
GCN
45% more memory bandwidth than a 6970.
33.3% more ALU's/TMU's than a 6970.
100% more ROPs than a 6970.

I think we re gonna see ~50% gains on a 6970 atleast.
Which might put the 7970 around 40% or so ahead of a 580.

Which to me, sounds freaking amazing coming so soon after the 580.

 

[AtenRa]

I dont believe they gonna install 64 ROPs in 79xx, most probably they will use 32 ROPs but faster than the previous generation.

I could be wrong