cheap GEIL 2GB DDR2 800 CL4.0 DUAL CHANNEL BLACK DRAGON RET

Search for:

Subscribe for our weekly mega deals

PC Components
Graphics Card
Hard Drives
Memory
DDR3 ModulesDDR2 ModulesDDR ModulesECC/Buffered ModulesSODIMM (Laptop / Notebook)SDR Modules
Motherboards
Processors (CPUs)
Multimedia & I/O
Fans & Cooling
Cables & Tools
Cases & Power Supplies
CD/DVD Drives/Writers

PC Components»Memory»DDR2 Modules

GEIL 2GB DDR2 800 CL4.0 DUAL CHANNEL BLACK DRAGON RET

	GB22GB6400C4DC

Product No: 9992

£ 29.46
inc VAT price: £ 34.62
In stock: 119

Like all SDRAM implementations, DDR2 stores memory in memory cells that are activated with the use of a clock signal to synchronize their operation with an external data bus. Like DDR before it, DDR2 cells transfer data both on the rising and falling edge of the clock (a technique called "dual pumping"). The key difference between DDR and DDR2 is that in DDR2 the bus is clocked at twice the speed of the memory cells, so four words of data can be transferred per memory cell cycle. Thus, without speeding up the memory cells themselves, DDR2 can effectively operate at twice the bus speed of DDR.

DDR2's bus frequency is boosted by electrical interface improvements, on-die termination, prefetch buffers and off-chip drivers. However, latency is greatly increased as a trade-off. The DDR2 prefetch buffer is 4 bits deep, whereas it is 2 bits deep for DDR and 8 bits deep for DDR3. While DDR SDRAM has typical read latencies of between 2 and 3 bus cycles, DDR2 may have read latencies between 4 and 6 cycles. Thus, DDR2 memory must be operated at twice the bus speed to achieve the same latency.

Another cost of the increased speed is the requirement that the chips are packaged in a more expensive and more difficult to assemble BGA package as compared to the TSSOP package of the previous memory generations such as DDR and SDRAM. This packaging change was necessary to maintain signal integrity at higher speeds.

Power savings are achieved primarily due to an improved manufacturing process through die shrinkage, resulting in a drop in operating voltage (1.8 V compared to DDR's 2.5 V). The lower memory clock frequency may also enable power reductions in applications that do not require the highest available speed.

Technical Information :

PC2-6400 800MHz CAS 4-4-4-12 2GB 800MHz CAS4 (1GBX2-SKU#GB22GB6400C4DC) 64Mx8 or 128Mx8 DDR2 FBGA Chips 240pin, Non-ECC, Un-buffered DIMM 8 Layers Custom Black Dragon PCB with LED Retail Package Working Voltage:1.9V - 2.4V Lifetime Warranty

Alternative products at ±10% price


GEIL 2GB DDR2 800 CL4.0 METALLIC ORANGE ALUMINUM RET Product No: 100671	GeIL	2	£30.984 inc. vat 36.41


GEIL 2GB DDR2 667 CL3.0 DUAL CHANNEL METALLIC ORANGE ALUMINUM RET Product No: 145553	GeIL	12	£29.58 inc. vat 34.76


ADATA 2GB DDR2 800 CL5.0 DUAL CHANNEL KIT RET Product No: 227130	Adata	6	£26.82 inc. vat 31.51


GEIL 2GB DDR2 800 CL4.0 DUAL CHANNEL METALLIC ORANGE ALUMINUM RET Product No: 189074	GeIL	136	£28.884 inc. vat 33.94

Products from the same brand


GEIL 2GB DDR2 667 CL5.0 16 CHIP BRUSH ALUMINUM RET Product No: 160096	GeIL	9	£24.672 inc. vat 28.99


GEIL 4GB DDR2 667 CL5.0 DUAL CHANNEL BLACK DRAGON RET Product No: 232835	GeIL	29	£49.92 inc. vat 58.66


GEIL 2GB DDR2 800 CL4.0 DUAL CHANNEL METALLIC ORANGE ALUMINUM RET Product No: 189074	GeIL	136	£28.884 inc. vat 33.94


GEIL 2GB DDR2 800 CL5.0 DUAL CHANNEL EVOONE RET Product No: 159192	GeIL	5	£40.104 inc. vat 47.12


GEIL 512MB DDR2 667 CL5.0 08 CHIP BRUSH ALUMINUM RET Product No: 129638	GeIL	59	£8.544 inc. vat 10.04


GEIL 512MB DDR2 533 CL4.0 08 CHIP BRUSH ALUMINUM RET Product No: 191082	GeIL	5	£7.356 inc. vat 8.64

SHOPPING CART

cart is empty

home | FAQs | contact us