Mình thấy Jumpstarter cũng khá ok, bạn thử check xem: 

CPU model : Intel(R) Xeon(R) CPU E5-2670 v2 @ 2.50GHz
Number of cores : 4
CPU frequency : 2500.092 MHz
Total amount of ram : MB
Total amount of swap : MB
System uptime :
Download speed from CacheFly: 59.3MB/s
Download speed from Coloat, Atlanta GA: 6.11MB/s
Download speed from Softlayer, Dallas, TX: 9.46MB/s
Download speed from Linode, Tokyo, JP: 5.42MB/s
Download speed from i3d.net, Rotterdam, NL: 65.9MB/s
Download speed from Leaseweb, Haarlem, NL: 13.5MB/s
Download speed from Softlayer, Singapore: 4.91MB/s
Download speed from Softlayer, Seattle, WA: 8.41MB/s
Download speed from Softlayer, San Jose, CA: 8.21MB/s
Download speed from Softlayer, Washington, DC: 12.1MB/s
I/O speed : 13.5 MB/s