AMD Radeon HD 9970 Specifications Leaked – Twice as fast as GTX 780 (ChipLoco rumor)

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tigersty1e

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Dec 13, 2004
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Of course it won't. How often are the newest high end cards the best bang for buck?

79XX series, Titan, 780, etc all had worse bang for buck compared to prior cards at release.

AMD's high-end has usually been very bang for buck. The exception is the 7970 going as far back as the 3870/50.

It's ironic. Competition usually lowers prices across the board. But AMD seeing Nvidia price gouging with their cards (even when AMD had the awesome 4870, 5870, and 6950) has given AMD reason to price the 7970 so high.

And even more ironic is that Nvidia saw AMD price gouging with the 7970 and then released their 680 at $500.
 

3DVagabond

Lifer
Aug 10, 2009
11,951
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AMD's high-end has usually been very bang for buck. The exception is the 7970 going as far back as the 3870/50.

It's ironic. Competition usually lowers prices across the board. But AMD seeing Nvidia price gouging with their cards (even when AMD had the awesome 4870, 5870, and 6950) has given AMD reason to price the 7970 so high.

And even more ironic is that Nvidia saw AMD price gouging with the 7970 and then released their 680 at $500.

Smaller chip, cheaper PCB, less RAM... Wasn't too hard to do. What's really amazing is that even after Tahiti was cheaper and faster is that they were able to hold that pricing.
 

piesquared

Golden Member
Oct 16, 2006
1,651
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I bet that VRAM on Hawaii will hit 6200-6300 mhz. AMD likely capped it to hit its TDP target. In some of those benchmarks the Hawaii trashes a 7970Ghz. I bet with more ROPs the chip is now taking more advantage of the available bandwidth as there are more ROPs that need to be fed. Otoh, I believe Tahiti XT had too much memory bandwidth like 4890 in its day while the GPU was bottleneck from a pixel fill-rate, texture, ACE and geometry engine perspective. When I overclock my VRAM to 1800mhz, in some games the scores barely move and I am sitting at 345.6 GB/sec of bandwidth or 31% over a stock 7970 card. I think 400GB/sec is still way too excessive for a chip like Hawaii but perhaps AMD is testing 512-bit for their future GPU generations with GDDR6. It's a good "pipe cleaner" to get ready for their 20nm generation and see how GCN architecture responds to higher memory bandwidth as it scales. I was actually anticipating Hawaii to come in at 384-bit with 7Gbps VRAM. Interesting decision AMD made here with the 512-bit bus that's usually more expensive, increases PCB complexity and uses more power.

In 4-5 years once 4K becomes more mainstream we are going to need GPUs with 1GB/sec memory bandwidth.

'usually' being the key word in that sentence. this bus is said to be both smaller and lower power than tahiti's. I wonder if it has anything to to with the hUMA bus.
 
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BoFox

Senior member
May 10, 2008
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I think I missed this, but where's the source saying that the 512-bit bus is smaller in terms of silicon real estate than Tahiti's 384-bit bus?
 

piesquared

Golden Member
Oct 16, 2006
1,651
473
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I think I missed this, but where's the source saying that the 512-bit bus is smaller in terms of silicon real estate than Tahiti's 384-bit bus?

No source, should say "reading the tea leaves". Could be wrong.
 

BoFox

Senior member
May 10, 2008
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Hehe - Baumann's "tea leaves"..

I think he is hinting that using Pitcairn's slower controllers, Hawaii's 512-bit bus might only take up 40mm^2 compared to Tahiti's bus taking up 60mm^2.
 
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HurleyBird

Platinum Member
Apr 22, 2003
2,725
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Well, he wouldn't have dropped that hint if they hadn't made some kind of optimization to Hawaii's memory controllers. They may not be as small as Pitcairn's (they actually probably are not) but they should be more area efficient than Tahiti's. Somewhere in-between most likely.
 

Skurge

Diamond Member
Aug 17, 2009
5,195
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Well, he wouldn't have dropped that hint if they hadn't made some kind of optimization to Hawaii's memory controllers. They may not be as small as Pitcairn's (they actually probably are not) but they should be more area efficient than Tahiti's. Somewhere in-between most likely.

Yeah, Tahiti is probably GCNs worst representative. It seems to do everything worse than every other chip. Cost of launching 1st I guess. I can't help but think that if AMD had just waited about 2 months Tahiti would have been a much better product than it currently is if it had incorporated the lessons learned in Pitcairn, but I guess there had to be a 1st product they learned from. One could say Hawaii is what Tahiti should have been. Similar to GTX480>GTX580
 

3DVagabond

Lifer
Aug 10, 2009
11,951
204
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Yeah, Tahiti is probably GCNs worst representative. It seems to do everything worse than every other chip. Cost of launching 1st I guess. I can't help but think that if AMD had just waited about 2 months Tahiti would have been a much better product than it currently is if it had incorporated the lessons learned in Pitcairn, but I guess there had to be a 1st product they learned from. One could say Hawaii is what Tahiti should have been. Similar to GTX480>GTX580

LOL The 480 was a broken piece of crap. Tahiti is just lacking in overall efficiency.
 

NostaSeronx

Diamond Member
Sep 18, 2011
3,688
1,222
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Tahiti(28HPL) to Hawaii(28HPM):

1. Smaller gate lengths.
2. Smaller SRAM sizes.
3. SiGe on PMOS.
 

Smoblikat

Diamond Member
Nov 19, 2011
5,184
107
106
LOL The 480 was a broken piece of crap. Tahiti is just lacking in overall efficiency.

480 wasnt broken...

It used a fair amount of power (equal to a GTX 580) and ran on the hot side, similar to an HD4870X2.

Not broken, just not completely perfect.
 

BoFox

Senior member
May 10, 2008
689
0
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Now you're really reaching. Tell that to those still happily gaming on them.
It was hot and used a lot of juice. That's it.

LOL, nope, that's not it - GF100 was indeed "unmanufacturable" as Charlie@S|A stated. A1 spin was broken, A2 was broken, and finally A3 came out with locked parts but NV still had to give up on it for GF110. And there were also people happily gaming on HD 2900XT's despite the competition. 3DVagabond's point was that Tahiti, on the other hand, came out fully unlocked without delay, and as a leader while still not perfect. Perhaps you should create a thread on your "troll-free" forum on this topic, if you must really reach..

Edit - just saw that Kyle said Hawaii does indeed beat Titan!! This confirms the leaked review that I took with a small grain of salt in fears of being let down like with Cayman, Bulldozer, etc..
 
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Keysplayr

Elite Member
Jan 16, 2003
21,209
50
91
LOL, nope, that's not it - GF100 was indeed "unmanufacturable" as Charlie@S|A stated. A1 spin was broken, A2 was broken, and finally A3 came out with locked parts but NV still had to give up on it for GF110. And there were also people happily gaming on HD 2900XT's despite the competition. 3DVagabond's point was that Tahiti, on the other hand, came out fully unlocked without delay, and as a leader while still not perfect. Perhaps you should create a thread on your "troll-free" forum on this topic, if you must really reach..

Edit - just saw that Kyle said Hawaii does indeed beat Titan!! This confirms the leaked review that I took with a small grain of salt in fears of being let down like with Cayman, Bulldozer, etc..

Jibberish. What I said stands. Easily.
 

sontin

Diamond Member
Sep 12, 2011
3,273
149
106
The 7970GHz is as crappy as the GTX480. If the second one used a broken chip then what uses the 7970GHz?!
 

Keysplayr

Elite Member
Jan 16, 2003
21,209
50
91
The 7970GHz is as crappy as the GTX480. If the second one used a broken chip then what uses the 7970GHz?!

They are both fine cards for their respective gens.

Neither are broken, but neither are perfect either.

Enough 3DVagabond OT. Please.
 

NostaSeronx

Diamond Member
Sep 18, 2011
3,688
1,222
136
The Fermi series was indeed broken. It wasn't Nvidia's fault for it but TSMC's which the 40nm node had a glitch in the BEOL.

All GF10x cards were affected by it and it wasn't until the GF11x cards till TSMC/Nvidia fixed the issue.
--
Tahiti was built on a low power node to get the time advantage. Where AMD wanted to get out first, Nvidia waited for the 28HP node for the higher performance.
 
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