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Isnt DX10 supposed to be GDDR4?

post #1 of 9
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ok so i was looking on the egg, and i noticed the G80 cards still say GDDR3 as the memory type. I dont understand, i thought direct x 10 cards were supposed to have ultra fast GDDR4 memory on them.. and if they dont, what makes them so much faster than the 7 series?
post #2 of 9
Quote:
Originally Posted by HeartOfAHydra View Post
ok so i was looking on the egg, and i noticed the G80 cards still say GDDR3 as the memory type. I dont understand, i thought direct x 10 cards were supposed to have ultra fast GDDR4 memory on them.. and if they dont, what makes them so much faster than the 7 series?
They don't have to have DDR4. DX10 is not hardware related in a sense, more of a programming code used by MS for rendering images/gaming.

The reason why the new 8 series cards are so much faster is simply the fab process, the blazing core speeds, along with the unified stream processors.
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post #3 of 9
Hahaha, GDDR4 is model dependant. DirectX10 would work on an onboard card if the motherboard could handle it. The only card out there right now with GDDR4 is the X1950XTX. GDDR3 is still plenty fast for any card out there. And to see why the G80's are so fast...look at how many pipelines that thing has...
post #4 of 9
DDR3 and DDR4 are not all that different. Stock speeds for DDR4 are 1ghz (2ghz DDR) and DDR3 chips come up to 900mhz stock (1.8ghz DDR). Those DDR3 chips can usually hit 2ghz (DDR speed) or higher on stock voltage. DDR3 is plently now, ATI sorta jumped the gun and confused people with it's DDR4 on the X1950XTX, the ONLY card which currently has DDR4.
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post #5 of 9
Quote:
Originally Posted by HeartOfAHydra View Post
ok so i was looking on the egg, and i noticed the G80 cards still say GDDR3 as the memory type. I dont understand, i thought direct x 10 cards were supposed to have ultra fast GDDR4 memory on them.. and if they dont, what makes them so much faster than the 7 series?
My best explanation is, Does RAM have to be DDR2? No it does not since the newer specifications of RAM don't require you to have DDR2. Sorry if I came off like an arse.
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post #6 of 9
Quote:
Originally Posted by Criswell View Post
My best explanation is, Does RAM have to be DDR2? No it does not since the newer specifications of RAM don't require you to have DDR2. Sorry if I came off like an arse.
However, there are advantages to DDR2.... low power consumption and faster clock speeds. Yes, latency is worse but are getting better as yields increase and production lines are tweaked.

As for GDDR3, it basically is the same reason to upgrade to DDR2. faster and lower power consumption. Mootsfox, I believe the GDDR4 is actually designed to run at 2.8GHz. The X1950XTX uses the first generation stuff so clock speeds may be limited due to the new production line The G80 is able to use GDDR4 by simply changing out the memory and BIOS flash. However, I believe the main reason it was not used was due to Samsung's production issues. They were producing less than expected. Rather than wait and risk it, nVidia went with GDDR3 which is more than adequate.
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post #7 of 9
Quote:
Originally Posted by DuckieHo View Post
However, there are advantages to DDR2.... low power consumption and faster clock speeds. Yes, latency is worse but are getting better as yields increase and production lines are tweaked.

As for GDDR3, it basically is the same reason to upgrade to DDR2. faster and lower power consumption. Mootsfox, I believe the GDDR4 is actually designed to run at 2.8GHz. The X1950XTX uses the first generation stuff so clock speeds may be limited due to the new production line The G80 is able to use GDDR4 by simply changing out the memory and BIOS flash. However, I believe the main reason it was not used was due to Samsung's production issues. They were producing less than expected. Rather than wait and risk it, nVidia went with GDDR3 which is more than adequate.

awsome explanation Thank You

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post #8 of 9
I'd love some GDDR4 action myself. But yea, DX10 is an Application API which allows for better texturing and such. It goes by the old sayings:
The Software is only as powerful as the hardware(where us OCers come in )
The Hardware is Only as powerful as the software
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post #9 of 9
That's like saying isn't windows vista supposed to be DDR2?
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