RAM Bandwidth Calculator – Memory Throughput
Calculate RAM bandwidth from memory type, frequency, bus width, and channels.
About This Calculator
Calculate RAM bandwidth from memory type, frequency, bus width, and channels. Use the calculator above for instant results.
Worked Examples
- 3200×2×64/8×2/1024 = 102.4 GB/s
Answer: 102.4 GB/s
- 5600×2×64/8×2/1024 = 179.2 GB/s
Answer: 179.2 GB/s
- 2400×2×64/8/1024 = 38.4 GB/s
Answer: 38.4 GB/s
Who Uses This Calculator?
Calculate RAM bandwidth for builds.
Memory configuration optimization.
Memory performance benchmarking.
Computer architecture memory study.
Common Mistakes to Avoid
❌ Dual channel matters
Going from single to dual channel nearly doubles bandwidth. For bandwidth-limited workloads (gaming, video editing), dual channel is critical.
❌ Frequency vs latency tradeoff
Higher frequency = more bandwidth. Lower CAS latency = faster response. For gaming, balance both.
Frequently Asked Questions
What is DDR?
Double Data Rate — transfers data on both rising and falling clock edges, doubling effective bandwidth vs single data rate.
DDR4 vs DDR5?
DDR5 offers higher speeds (4800-8000 MHz vs DDR4 2133-4800) and dual-channel on each DIMM. More bandwidth, but higher latency initially.
When is RAM bandwidth a bottleneck?
In-memory databases, video editing, scientific computing, CPU integrated graphics (uses system RAM). Gaming is rarely RAM bandwidth limited.