Overclocking

To test overclocking on our cards I break it all down by GPU and then Memory clock speeds to get the higher possible clock on each and then attempt to run them together. I document all of it below as well. With the Sapphire Toxic R9 270X I started with its GPU clock speed and with its already high overclock I jumped up to 1250MHz to start. This passed without any issues, but as soon as I went to 1300MHz things failed. The same happened again when I tried increasing the power available. I finally got it to pass at 1275MHz. This is higher than what I was able to pull from the Gigabyte card, its highest was 1225MHz.

Next my memory overclocking was short lived. When you combine the high base overclock the Toxic provided, combined with the low limit that AMD set. I quickly ran into that limit without an issues. I have a feeling these cards are capable of a lot more if you get into overclocking them via a BIOS flashes.

Surprisingly, my combined testing failed the first time at 1275MHz on the GPU but dropping things down to 1265MHz corrected that issue and gave a pass result. In the end the Toxic overclocked better than our last R9 270X although I can’t help but feel there is a lot more to be found for performance in it if you tried.