Datasheet

Confidential Page 7
MSI R4870 - Industry First GDDR5 Graphics Card
• Qimonda ID6V51-05A1F1C-40X
• TSMC 55nm manufacture process
• Lower 1.5V voltage than GDDR3 (1.8V)
• Double Data Rate (x2) = 3.6GHz
• Higher memory bandwidth with 256
bits interface
Memory
Bandwidth
=
(Memory Clock ) x (Interface Bits)
8
Memory Bandwidth in GB/sec
Divide by 8 (convert bits-bytes)
8800GTX(384 bits)
MSI R4870 (256 bits)
Memory
Bandwidth
86.4 GB/s
115.2 GB/s
Higher is better
9800GTX(256bits)
70.4 GB/s
64% More Bandwidth