AWS 預先公告新的 C4 instance：「New Compute-Optimized EC2 Instances」。
The new C4 instances are based on the Intel Xeon E5-2666 v3 (code name Haswell) processor. This custom processor, designed specifically for EC2, runs at a base speed of 2.9 GHz, and can achieve clock speeds as high as 3.5 GHz with Turbo boost. These instances are designed to deliver the highest level of processor performance on EC2.
雖然還沒正式推出，不過可以預期效能會比 C3 高出不少... (拿來跑各種運算)