- Jul 9, 2015
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So I recently bought a quality power supply, so in order to test it out, I thought I should delve into the world of GPU overclocking. My Sapphire R9 270X Dual-X is still very much a respectable performing card at 1080p on stock clocks, but I thought I should try to get a little more performance from it while it can perform.
The stock speeds are base clock at 1020 MHz, Boost Clock at 1070 MHz, and Memory at 1400 Mhz.
So I used MSI Afterburner for the software, I maxed out the Power limit to 20%, like what every single tutorial said, and didn't touch the Core voltage, again like what every single tutorial said. Little by little, I increased the Core clocks, first I just jumped to 1100 Mhz, tehn 1125 MHz, 1150 MHz, 1175 MHz, then I stopped at 1200 Mhz, all tested with both Unigine and Furmark for stability, with temperatures not exceeding 57 Celsius on the core (No VRM temp sensor to speak of in GPU-Z).
I was kind of confused that I could go that far in speed on stock voltage. I didn't want to risk it, so I stopped on the Core clock, and increased the Memory to 1450 MHz. Same thing, low temps, no instablilty.
On stock clocks, my card, with the same environment and fan curve, idled on windows at 34 Celsius, and on the 1200/1450 overclock, it idles at 39 celsius. That's sounds pretty normal, more power and speed= more heat.
Now the weird stuff, I started playing some Mount and Blade: Warband, the only game I currently have installed. When I played on the stock clock speeds, I was getting 60 FPS with 2xAA, 75% texture quality, with low quality shaders and shadows on some maps, the bigger maps I had to turn off AA. The temperature for the card were running at around 56 to 59 Celsius.
Now with the overclock in place, I have gotten 60 FPS on every map I've played on with 4xAA, 100% Texture quality, and high shader and shadow quality. All of this at a constant 49 Celsius...
How? How is this even possible? It breaks the more power and speed=more heat. I'm not complaining, but this is really weird, should I overclock even more to get lower temperature?
The stock speeds are base clock at 1020 MHz, Boost Clock at 1070 MHz, and Memory at 1400 Mhz.
So I used MSI Afterburner for the software, I maxed out the Power limit to 20%, like what every single tutorial said, and didn't touch the Core voltage, again like what every single tutorial said. Little by little, I increased the Core clocks, first I just jumped to 1100 Mhz, tehn 1125 MHz, 1150 MHz, 1175 MHz, then I stopped at 1200 Mhz, all tested with both Unigine and Furmark for stability, with temperatures not exceeding 57 Celsius on the core (No VRM temp sensor to speak of in GPU-Z).
I was kind of confused that I could go that far in speed on stock voltage. I didn't want to risk it, so I stopped on the Core clock, and increased the Memory to 1450 MHz. Same thing, low temps, no instablilty.
On stock clocks, my card, with the same environment and fan curve, idled on windows at 34 Celsius, and on the 1200/1450 overclock, it idles at 39 celsius. That's sounds pretty normal, more power and speed= more heat.
Now the weird stuff, I started playing some Mount and Blade: Warband, the only game I currently have installed. When I played on the stock clock speeds, I was getting 60 FPS with 2xAA, 75% texture quality, with low quality shaders and shadows on some maps, the bigger maps I had to turn off AA. The temperature for the card were running at around 56 to 59 Celsius.
Now with the overclock in place, I have gotten 60 FPS on every map I've played on with 4xAA, 100% Texture quality, and high shader and shadow quality. All of this at a constant 49 Celsius...
How? How is this even possible? It breaks the more power and speed=more heat. I'm not complaining, but this is really weird, should I overclock even more to get lower temperature?
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