Gddr2 Sdram/DDR II SDRAM

Gamer383 · 03-19-2008, 05:05 PM

i would just like to know what the differences between the 2 are, if there are any?

Question comes from lookng at 2 same video cards with different descriptions

Dirky52 · 10-25-2008, 06:40 AM

The first commercial product to claim using the "DDR2" technology was the NVIDIA GeForce FX 5800 graphics card. However, it is important to note that this GDDR-2 memory used on graphics cards is not DDR2 per se, but rather an early midpoint between DDR and DDR2 technologies. Using "DDR2" to refer to GDDR-2 is a colloquial misnomer. In particular, the performance-enhancing doubling of the I/O clock rate is missing. It had severe overheating issues due to the nominal DDR voltages. ATI has since designed the GDDR technology further into GDDR3, which is more true to the DDR2 specifications, though with several additions suited for graphics cards.

GDDR3 is now commonly used in modern graphics cards and some tablet PCs. However, further confusion has been added to the mix with the appearance of budget and mid-range graphics cards which claim to use "GDDR2". These cards actually use standard DDR2 chips designed for use as main system memory. These chips cannot achieve the clock speeds that GDDR3 can but are inexpensive enough to be used as memory on mid-range cards.

03-19-2008, 05:05 PM	#1 (permalink)
Gamer383 Registered User Join Date: Jan 2008 Posts: 77 OS: XP pro SP2	Gddr2 Sdram/DDR II SDRAM i would just like to know what the differences between the 2 are, if there are any? Question comes from lookng at 2 same video cards with different descriptions Last edited by Gamer383; 03-19-2008 at 05:06 PM.

10-25-2008, 06:40 AM	#2 (permalink)
Dirky52 Registered User Join Date: Oct 2008 Posts: 1 OS: Vista	Re: Gddr2 Sdram/DDR II SDRAM The first commercial product to claim using the "DDR2" technology was the NVIDIA GeForce FX 5800 graphics card. However, it is important to note that this GDDR-2 memory used on graphics cards is not DDR2 per se, but rather an early midpoint between DDR and DDR2 technologies. Using "DDR2" to refer to GDDR-2 is a colloquial misnomer. In particular, the performance-enhancing doubling of the I/O clock rate is missing. It had severe overheating issues due to the nominal DDR voltages. ATI has since designed the GDDR technology further into GDDR3, which is more true to the DDR2 specifications, though with several additions suited for graphics cards. GDDR3 is now commonly used in modern graphics cards and some tablet PCs. However, further confusion has been added to the mix with the appearance of budget and mid-range graphics cards which claim to use "GDDR2". These cards actually use standard DDR2 chips designed for use as main system memory. These chips cannot achieve the clock speeds that GDDR3 can but are inexpensive enough to be used as memory on mid-range cards.