**Upgrade C1 to C5 where possible, do not use for new applications** C5 instances provide the latest Intel Xeon processors paired with the new Nitro Hypervisor which delivers practically all of the compute and memory resources of the host hardware to your instances.
| Size | vCPUs | Memory (GiB) |
|---|---|---|
| c1.medium | 2 | 1 |
| c1.xlarge | 8 | 7 |
| Compute | Value |
|---|---|
| vCPUs | 2 |
| Memory | 1.7 GiB |
| Physical Processor | Intel Xeon Family |
| Clock Speed | NA |
| CPU Architecture | 32-bit or 64-bit |
| GPU | NA |
| GPU Memory | NA |
| Networking | Value |
|---|---|
| Network Performance | Moderate |
| Enhanced Networking | No |
| Storage | Value |
|---|---|
| Storage | 1 x 350 SSD |
| EBS Throughput | NA |
| Amazon | Value |
|---|---|
| Current Generation | No |
| Instance Type | c1.medium |
| Family | Compute optimized |