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Power Cost Estimator
Estimate annual electricity costs for your PC, Server, or TV.
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PC Hardware Tools
Estimate power cost and convert RAM timings to true nanosecond latency.
4 tools in this category
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RAM Latency Calculator
Convert DDR3/DDR4/DDR5 timings (CL, tRCD, tRP, tRAS) into true latency in nanoseconds.
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LLM VRAM Calculator
Calculate the VRAM needed to run or fine-tune any LLM at any quantization.
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LLM API Pricing Calculator
Compare API costs across major models (OpenAI, Anthropic, Google) with prompt caching.
Use Tool ➜About PC Hardware Tools
TechCompare's hardware tools give you straightforward answers to the questions that come up when building or upgrading a PC. The Power Cost Estimator turns a wattage number into an annual electricity bill, and the RAM Latency Calculator converts DDR timings into true nanoseconds so you can compare kits honestly.
Use this collection alongside the Data and Screens tools when spec'ing a new build. It requires no drivers, no installers, and no accounts. You can easily validate your memory kit's real-world latency before you buy.
Frequently asked questions
How do I calculate my PC's annual electricity cost?
Multiply average draw in watts by hours used per day, then by your local kWh rate. The Power Cost Estimator handles this automatically for PCs, servers, and TVs, and lets you set an idle/load mix so gaming machines (which spend most of their time idle) don't get over-counted.
Is DDR5-6000 CL30 really faster than DDR5-5600 CL28?
The RAM Latency Calculator shows true latency in nanoseconds: DDR5-6000 CL30 works out to 10.0 ns, and DDR5-5600 CL28 also works out to 10.0 ns, which is effectively identical. In practice DDR5-6000 wins because its higher bandwidth benefits most workloads, but tight timings at lower frequency can match it for latency-sensitive tasks.
What tool should I use to compare RAM kits?
The RAM Latency Calculator shows true latency in nanoseconds and peak bandwidth for any DDR3, DDR4, or DDR5 kit. Enter the speed and CL from two kits you're comparing and the tool tells you which is actually faster in absolute terms.
Do these tools need an installer?
No. Everything runs in the browser, uses no external services, and stores nothing on your device. The calculators work in any browser released in the last few years.