The development of RAMBUS memory has gone through three main stages. The first and second generation products are called "basic RAMBUS" and "concurrent RAMBUS". At present, the memory speed has reached the data transmission rate of 600MHz, and it has been applied to some entertainment facilities (such as Sony PS2), high-end graphics workstations and some high-performance graphics cards. The third generation product is called Direct RAMBUS, and its memory module is abbreviated as RIMM(RamBus In-line Memory Module). At present, it is mainly used in some high-performance personal computers, graphics workstations, servers and other devices that require high bandwidth and delay. Notebooks with RAMBUS memory are expected to come out at the end of 2000.
What speed does RAMBUS offer?
At present, RAMBUS memory can provide three speeds of 600, 700 and 800MHz.
How fast is RAMBUS memory at present?
The high-speed clock frequency of 400MHz makes the effective data transmission rate reach 800Mbit/s (data is transmitted through the rising and falling edges of the clock signal, so 2 bits of data are transmitted every clock cycle). Because the data channel of RAMBUS is 16 bits, the transmission rate of each channel can reach 1.6 gbyte/s, and because there is more than one channel with Intel architecture, it can obtain larger data transmission bandwidth and achieve higher data transmission speed.
What is RAMBUS Connection Card (C-RIMM for short)?
RAMBUS connection card, also known as connection RIMM, does not come with any RDRAM devices, and is only used to insert an empty RAMBUS memory slot as a connection device.
Why do I need a RAMBUS connection card?
Because RAMBUS adopts transmission bus technology, all its memories and connection cards must be connected into a whole to maintain the continuity of memory data transmission channels, so the connection cards must be inserted into empty memory slots. When the memory needs to be upgraded, just replace the corresponding connection card with RAMBUS memory.
What is the radiator of RAMBUS memory?
High-speed data transmission brings a lot of heat, and the outer layer of RAMBUS memory is wrapped with aluminum shell to protect RAMBUS memory, which plays an excellent heat dissipation role.
Is there ECC function in RAMBUS memory?
Yes, but it is different from ECC memory on the market at present. In RAMBUS memory, you can't find a special error detection chip, so it is difficult to distinguish ECC RAMBUS memory from non-ECC RAMBUS memory in appearance. RAMBUS memory with verification function is 18 bit, while ordinary RAMBUS memory without verification function is 16 bit. That is to say, RDRAM with ECC function only adds two parity bits to ordinary RDRAM. For a simple example, 64MB RDRAM with ECC function is actually 72MB, and 128MB RDRAM with ECC function is actually 144MB, that's all. But generally we call it "64MB ECC" and "128MB ECC".
What are Intel 820 and 840 motherboards?
This is Intel's new generation motherboard supporting RAMBUS memory, of which 820 is used for general desktop systems and 840 is used for high-end workstations. RAMBUS memory can only be used on these motherboards designed for it.
820 is the motherboard recently designed by Intel for its high-performance personal computer. This motherboard supports PIII and PII processors. The 820 motherboard fully embodies the advantages of Intel820 chip, including the new and faster 133MHz system bus; RAMBUS RDRAM has twice the bandwidth of SDRAM; Enhanced AGP4x 3D graphics processing and faster UDMA/66 hard disk access speed. The 820 motherboard has two memory slots, and the memory speed can be 600,700,800 MHz.
The 840 motherboard supports different workstation configurations: single processor or dual processor, 133MHz or 100MHz system bus, PC600 or PC800 RDRAM, AGP 4x or AGP Pro 50 graphics processing. The 840 motherboard supports two RAMBUS channels, reaching a peak bandwidth of 3.2 GB/s and up to four memory slots. "Dual Channel" means that each channel has two memory slots. On the 840 motherboard, the memory can only work at 600 or 800MHz.
At present, only motherboards with 820 and 840 chipsets can use RAMBUS memory. Manufacturers such as Dell, SGI and Compaq have introduced products based on 820 and 840 chipsets.
What manufacturers produce RAMBUS memory now?
As far as I know, at present, Samsung, NEC, Toshiba, Hitachi and other major manufacturers can provide RAMBUS memory. In addition, VIKING, a famous American professional memory manufacturer, has also become a force to be reckoned with among RAMBUS memory manufacturers. According to reliable sources, Viking RAMBUS memory has become the designated memory brand of Intel 820/840 motherboards in the world tour. By then, we will be in Beijing, Shanghai, Guangzhou and other big cities.