CPU vs GPU

CPU vs GPU

CPU	GPU
• 5% of area is ALU	• 40% of area is ALU
• Memory – low latency (1/10 of GPU)	• Memory – high bandwidth (10 times CPU)
• Big Cache (10 times GPU)	• Small Cache
• Just load stores/Linear memory	• Fancy memory – tiling – arithmetic in memory
• Limited number of concurrent threads	• 1000s of threads can run in parallel
• Threads are heavyweight. Context switch is expensive	• Threads are extremely light weight