Compare two kits side by side: effective speed, true latency and dual-channel bandwidth in one view.
Updated 11 Nov 2026 · 2 min read
Quick answer
Enter two kits’ speeds and CAS latencies. The calculator works out true latency and theoretical bandwidth for each and calls a winner — the same maths our comparison articles use.
RAM Speed Calculator
Compare two kits side by side: effective speed, true latency and dual-channel bandwidth in one view.
How to read the comparison
- Lower latency (ns) wins for gaming responsiveness.
- Higher bandwidth (GB/s) wins for integrated graphics and data-heavy work.
- If one kit wins both, the decision is made. If they split, gaming builds take latency; iGPU and workstation builds take bandwidth.
Frequently asked questions
Why does it ask for channels?
Bandwidth scales linearly with channels: the same kit delivers double the GB/s in dual channel. Latency does not change with channels.
Can I compare a DDR4 kit against DDR5?
For the latency/bandwidth numbers, yes — the physics is identical. Just remember the two can never go in the same motherboard.