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Friday, 03 September 2010 13:17

Radeon HD 6700 Series rumored to use 256-bit memory bus

Written by Slobodan Simic
radeon_logo_new

Might make sense

According to a post over at Donanimhaber.com, AMD's upcoming Radeon HD 6700 Series graphics cards might use a 256-bit memory interface.

The 256-bit memory interface comes as a surprise considering that the current Radeon HD 5700 Series features a 128-bit memory interface, but it could make sense as all reports indicate that the upcoming HD 6000 series graphics cards are all about evolution.

This also could be the way to keep the available Radeon HD 5700 Series alive as AMD can drop its price and keep selling it until they clear out the stock as thanks to the "evolution" and the wider memory interface, Radeon HD 6700 Series should end up significantly faster.

Judging by some early benchmarks, Radeon HD 6000 cards will offer a significant performance boost over the current generation, but bear in mind that they still stick to the same 40nm production process. Using a wider memory bus could be one of the ways of boosting performance while using the same production process, but it would also increase production costs.

You can find more here.
Last modified on Friday, 03 September 2010 21:56
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Comments  

 
-28 #1 yourma2000 2010-09-03 14:01
If that's the case then the HD 6800 cards will probably using a 384bit bus width
 
 
+28 #2 himanshu 2010-09-03 14:09
Quoting yourma2000:
If that's the case then the HD 6800 cards will probably using a 384bit bus width

Na.. It will have 256 bit bus. It will have memory frequency of 1600 mhz ddr, as seen from the leaked gpuz snapshots. and the memory bandwidth was 204 gb/s so cant be 384 bit..
 
 
-19 #3 yourma2000 2010-09-03 14:43
Quoting himanshu:
Na.. It will have 256 bit bus. It will have memory frequency of 1600 mhz ddr, as seen from the leaked gpuz snapshots. and the memory bandwidth was 204 gb/s so cant be 384 bit..



well it was an unconfirmed leaked screenshot from an out of date GPU-Z (0.4.5), 0.4.6 was released yestreday which "Added basic detection for AMD Radeon HD 6000 Series", so I wouldn't trust the older version which doesn't have this
 
 
+3 #4 Haberlandt 2010-09-03 16:26
Quote:
This also could be the way to keep the available HD 5700 series alive as AMD can drop its price and keep selling it until they clear out the stock as thanks to the "evolution" and the wider memory interface, HD 6700 series should end up significantly faster.
So this means that the 5700 series are bandwidth limited? That would make sense since the 5670 has similar bandwidth.

5670 -> 64.0 GB/s
5750 -> 73.6 GB/s
5770 -> 76.8 GB/s

On the other hand, the 5830 has 128 GB/s but is not a lot faster when compared to the 5770.
 
 
+4 #5 Bl0bb3r 2010-09-03 17:11
Quoting Haberlandt:
On the other hand, the 5830 has 128 GB/s but is not a lot faster when compared to the 5770.



Not a lot faster at what? Surely you don't compare the overall performance of the chips... because the performance depends on a lot of other characteristics of the GPU, not just memory bandwidth.


"AMD can drop its price"
Oh boy, fingers crossed, here goes nothing! (= I wish)
 
 
-17 #6 Haberlandt 2010-09-03 17:30
Quoting Bl0bb3r:
Quoting Haberlandt:
On the other hand, the 5830 has 128 GB/s but is not a lot faster when compared to the 5770.



Not a lot faster at what? Surely you don't compare the overall performance of the chips... because the performance depends on a lot of other characteristics of the GPU, not just memory bandwidth.
Wtf are you talking about? I'm obviously referring to the overall performance of the graphics cards. If I had referred to the bandwidth, I'd have said that the 5830 is a lot faster than the 5770 since it has nearly twice the bandwidth. Performance-wise, the 5830 is not nearly twice as fast as the 5770.

I'm guessing you have a 5830.
 
 
+18 #7 Super XP 2010-09-03 17:50
Evergreen’s 40nm process is more than a year old. This 40nm process is a lot more mature which helps enable AMD to squeeze out a lot more performance as possible while either besting or staying within Evergreen’s recorded thermals & temperatures.
As for 256-Bit over 128-Bit, quite logical, it’s called Northern Island. Those Next Gen parts needed a larger memory bus in order to benefit from an abnormal performance leap, something which you would only find in a so called Next Gen design.
Start saving your pennies because these ATI Radeon HD 6000 bunnies are going to perform like there was no tomorrow.
Source: I live less than 20min away from ATI’s Headquarters in Markham, ON Canada.
 
 
-28 #8 INSPIREARUN 2010-09-03 18:53
MUCH UPDATED WITH BENCHMARK ON ATI RADEON HD 6000 SERIES
WITH REASE DATE INFO AND MODELS TO BE RELEASED
GO FOR MORE

http://lensfire.blogspot.com/search/label/ati%206000%20series%20evolved

Read more: http://www.electronista.com//articles/10/08/15/leak.details.ati.southern.islands.launch.window/#ixzz0yUSMOnrb
 
 
+15 #9 GeekLyfe 2010-09-03 19:48
AMD is on the move. I wonder if nvidia will ever have an answer to amd's high end graphics cards. I guess we have to wait and see.
 
 
+14 #10 agent_47 2010-09-03 19:51
Quoting Haberlandt:
So this means that the 5700 series are bandwidth limited? That would make sense since the 5670 has similar bandwidth.

5670 -> 64.0 GB/s
5750 -> 73.6 GB/s
5770 -> 76.8 GB/s

On the other hand, the 5830 has 128 GB/s but is not a lot faster when compared to the 5770.


nope. on my 5770, if i reduce core clock speed to 635Mhz (25% lowe), performance drops by 10%. if i put core to 850 and mem to 900Mhz (25% slower), performance drop by 10% again!!
meaning none of the two is bottlenecking each other. they are very well balanced. but using 256bit on 6700 would mean the core will will pack more shader and\or higher frequency and/or higher IPC compared to 5700
 

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