Depending on the GPU, it can be off by anywhere from a few watts to potentially 50W or more.
We've used GPU-Z in the past, but it had some clear inaccuracies. The best and most accurate means of measuring the power use of a graphics card is to measure power draw in between the power supply (PSU) and the card, but it requires a lot more work. Alternatively, you can measure power at the outlet using something like a Kill-A-Watt (opens in new tab) power meter, but that only captures total system power, including PSU inefficiencies. The easiest approach is via software like GPU-Z, which will tell you what the hardware reports. There are various ways to determine power use, with varying levels of difficulty and accuracy. We're here to press the reset button on GPU power measurements and do things the right way. Measuring performance is relatively easy, but measuring power can be complex. To determine GPU power efficiency, we need to know both performance and power use. Monitors: Belinea 17" CRT, KTC 17" CRT, 2x HP 19" Office monitor.ĬPU: AMD R7 1700 | Motherboard: ASRock X570 Fatal1ty Gaming K4 | GPU: Sapphire RX480 4GB Nitro+ | RAM: Corsair Vengeance LPX 2x8GB 3200Mhz | Hard Drive: Corsair ForceLS SSD | Hard Drive: 250GB Maxtor SATA 7200RPM 8MB | Hard Drive: 250GB Seagate Baracuda SATA 7200RPM 8MB | Hard Drive: 500GB WesternDigital Blue 7200RPM 16MB | Power Supply: Corsair TX850M | Cooling: Cooler Master 212 EVO | Case: Thermaltake View 27 | Operating System: Windows | Monitor: AOC i2267FWH 21.How much power do the best graphics cards use? It's an important question, and while the performance we show in our GPU benchmarks hierarchy is useful, one of the true measures of a GPU is how efficient it is.
GPU: Voodoo 3, GeForce2 MX 400, GeForce4 MX 440, Inno3D 7300GT 256MB AGP8X, Sapphire Radeon X550 256MB PCI-Ex16, PowerColor Radeon HD6950 1GB, Sapphire R9 290 Tri-X 4GB
CPU: Intel Pentium 2 400 AMD Athlon Orion 1000 AMD Athlon Thunderbird 1000B AMD Athlon 64 LE-1640 Orleans OC to 2.9Ghz, AMD Athlon 64 X2 5050e Brisbane OC to 2.9Ghz, AMD Phenom II 960T 1605T 2.8Ghz CPU-NB
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