Originally Posted by matagyula
This thread is already very helpful, but before I jump into false conclusions about my card, I'd like to ask You for help/info.
My Sapphire 7870 XT seems to be very "hot-headed" - at 20°C ambient temps. it idles at 37°C, and while gaming it goes up to 77°C. This is with the clock at 1100/1500 in CCC/Overdrive enabled, but the power control is at -10%. The max temperature was around 3-5°C lower with overdrive disabled/everything at stock setting. I've read a post suggesting lowering the core voltage, as the stock one is deemed too high - but MSI afterburner just crashed my PC when I enabled voltage modifications (and so I am rewriting most of this post for the second time ... ).
I upgraded from a Sapphire HD6870 in hope of lower temps, and mainly lower noise, as a quiet but powerful gaming PC is what I am aiming for.
One strange thing I noticed was the GPU utilization having minimal to no effect at all on the GPU temps. DotA 2 uses 20-40% of the GPU at most, yet still the card reaches 70+°C. The old one would be around 67°C, while being pushed to its limits (overclocked by a little bit).
I started looking at aftermarket cooling solutions, and so far I'm torn between the Arctic Accelero Twin Turbo II (€38) and the Arctic Accelero S1 Plus (with a 120 mm Noctua fan perhaps) (€24 + €18 for the fan, which would make it more expensive that the TT II, heh). The Prolimatech MK-26 looks gorgeous, but the price (€59 without the fan(s)) makes it really hard to justify on a card I got for €170.
I've also read a post claiming a 3-4°C decrease in temperatures gained by applying new thermal paste, but to be honest, I'm looking for a way to drop temps by a good 10-15°C. My i5 2500K is kept cool and silent by a Noctua NH-D14 -> 4,4GHz @ 70°C under full load (but the fan speed kept low). While I gladly paid the premium for the CPU cooler as the CPU is something I'm going to be keeping a while longer, I am not so sure about paying over €40 for a GPU cooler with a ~2 year life-time before an upgrade is needed.
This turned into a wall of text pretty fast, sorry ^^
The TL;DR version - Sapphire HD 7870 XT very loud and hot - fans 65%+, temp 77°C, with 1100/1500, and -10% power set in CCC/Overdrive. GPU utilization seems to make no difference - even a slight load causes temps above 70°C, while 78°C is the max with furmark.
The questions - am I just unlucky with the silicon I got? Should I go straight for an aftermarket cooler or should I mess around with the voltages/re-apply thermal paste? Thanks for your help in advance