What is the DDR3 memory?

DDR3 video memory can be seen as an improved version of DDR2, both of which have many similarities, such as the use of 1.8V standard voltage, mainly 144Pin spherical pins FBGA package. However, DDR3 core has improved: DDR3 video memory using 0.11 micron production process, the power consumption is significantly lower than DDR2. In addition, DDR3 video memory using the "Pseudo Open Drain" interface technology, as long as the voltage is appropriate, display chips can directly support DDR3 memory. Of course, the long delay time of video memory particles (CAS latency) has been a major common problem of high frequency video memory, DDR3 is no exception, DDR3 CAS latency for 5/6/7/8, compared DDR2 to 3/4/5. Objectively speaking, DDR3 relative to the DDR2 in the technology does not advance rapidly, but DDR3 performance advantages are still more obvious:

(1) Low power and heat consumption: Learn from the DDR2 lessons, in the control of costs based on reducing energy consumption and calorific value, making DDR3 more easily accepted by users and manufacturers.

(2) Higher working frequency: Due to lower energy consumption, DDR3 can achieve a higher frequency of work, to a certain extent to make up for the long delay of the shortcomings, but also as a video card, one of the selling points, this in the match with DDR3 memory card has been shown.

(3) Reduce the overall cost of graphics card: DDR2 video Memory particle specifications for more than 4M X 32bit, with high-end graphics cards commonly used in 128MB memory will need 8. and DDR3 video memory specifications for 8M X 32bit, a single particle capacity of larger, 4 can constitute 128MB video memory. In this way, the graphics card PCB area can be reduced, the cost can be effectively controlled, in addition, the reduction in the number of particles, memory power consumption will be further reduced.

(4) Good versatility: Compared to the DDR change to DDR2,DDR3 for DDR2 compatibility better. Because of the key features such as pins, encapsulation and so on, with the DDR2 display core and the public version of the design of the graphics card slightly modified to be able to use DDR3 video memory, which is very good for manufacturers to reduce costs.

At present, DDR3 has been widely used in most of the new high-end graphics cards.

Real Watch GDDR3 and DDR3

GDDR3 uses 4BIT prefetch design, which is the same as desktop-level memory DDR2, so we can see that GDDR3 is a DDR2 based architecture that specifically reinforces and uses better encapsulated DDR2 in order to optimize graphics processing needs. The recent GDDR4 is based on the DDR3 Desktop Memory architecture, using a higher 8BIT prefetching mechanism.

There is little GDDR3 and DDR3 gaps in performance, and high specification performance is quite close. But DDR3 is more advantageous than GDDR3 in terms of cost.

Generally speaking: GDDR3 is a memory chip which belongs to the DDR2 architecture system and graphics processing. For example, ATI 4890 and 4870 use a GDDR5 memory chip based on the DDR3 architecture ... All GDDR3 and DDR3 are two different sizes of memory.