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[VR-Zone] Radeon HD 4850 (RV770PRO) Tested - Page 6

post #51 of 89
Quote:
Originally Posted by ChrisB17 View Post
Well I would like a GDDR4 4850 are those coming out this month? And what difference would I notice beetween GDDR3,GDDR4 and GDDR5?
Mhz is the difference my friend. Fore example GDDR4's max speed is about 2.4ghz, GDDR5's is theoretically 5.5ghz but AMD said they only got 4.5ghz (still a massive jump, over double bandwidth.) If you want to learn more about the differences in Graphics Double Data Rate generations Wikipedia has a few good articles. (Also take not with every revision the power requirements drop.)

http://en.wikipedia.org/wiki/GDDR3

http://en.wikipedia.org/wiki/GDDR4

http://en.wikipedia.org/wiki/GDDR5

And finally the master DRAM article.

http://en.wikipedia.org/wiki/Dynamic..._access_memory
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post #52 of 89
So the 4850 GDDR3 and GDDR4 come out this month? I'm so damn anxious to buy a new card.
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post #53 of 89
Quote:
Originally Posted by Licht View Post
Theres your magic numbers.

Who says this is the final and not an engineering sample they sent instead? Additionally its the HD 4850 not 4870, hence it is only mid range.
p6466 vantage points looks fantastic for the cost, the performance of an 8800gtx isn't it? and we'll be seeing very nice prices, similar to the 8800gts.
    
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post #54 of 89
Quote:
Originally Posted by Brenbren View Post
p6466 vantage points looks fantastic for the cost, the performance of an 8800gtx isn't it? and we'll be seeing very nice prices, similar to the 8800gts.
I'm not familiar with 3D Mark Vantage scores sadly.
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post #55 of 89
Quote:
Originally Posted by Licht View Post
I'm not familiar with 3D Mark Vantage scores sadly.
here's some reference material.
http://futuremark.yougamers.com/foru...ad.php?t=74114
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post #56 of 89
Quote:
Originally Posted by ChrisB17 View Post
So the 4850 GDDR3 and GDDR4 come out this month? I'm so damn anxious to buy a new card.
There is no GDDR4 in the 4800 series.
There will be

HD4850 512MB GDDR3
HD4850 512MB GDDR5 -- As far as I know, it is still rumored that this card may have been cancelled
HD4870 512MB GDDR5
HD4870 1024MB GDDR5
HD4870X2 GDDR5

The GDDR3 4850 launches later this month, the 4870 (and maybe GDDR5 4850) will launch as soon as GDDR5 availability is high enough. I think the 4870 will paper launch alongside the 4850, but not 100% certain.
Edited by darkcloud89 - 6/3/08 at 12:10pm
post #57 of 89
how would crossfire work with a 512mb 4870 + 1024mb 4870?
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post #58 of 89
At 78C it well better be full load......that's hotter than my 2900XT was on air at full load.....with 20C ambient.
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post #59 of 89
Quote:
Originally Posted by Johnny Utah View Post
Very good information, thanks.
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Lee XT
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post #60 of 89
Quote:
Originally Posted by Johnny Utah View Post
how would crossfire work with a 512mb 4870 + 1024mb 4870?
thats the sexyness about Crossfire, it works

I doubt they'll make a 4850 GDDR5, ATI is bridging a bigger gap between their more mid range and more high end products, GDDR5 makes it look more high end exclusive and since their both the same chips pratically, people who know what they are doing can clock their 4850's to 4870 speeds, GDDR3 minimizes the potential of the card by a whole lot.
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