MSI GE75 8RF Thermal Testing, Overclocking and Undervolting
Ive got the GE75 8RF version here, which is the 17 inch version with an Intel. I7: 8750H CPU 16GB of memory running in dual channel and Nvidia GTX 1070 graphics.. The GE75 is also available with GTX 1060 RTX, 2060, 2070 or 2080 graphics so expect different results with different configurations.. The 1070 here performs similarly to the 2060, and you can find updated pricing linked in the description. On the bottom of the laptop there doesnt appear to be many vents for air flow, just some small cut outs above the intake fans.. There were also a couple of heatpipes shared between the processor and graphics, so a change in temperature of one of these will affect the other., The MSI Dragon Center software allows you to change, fan speed from auto, which was the stock default or cooler boost mode, which Basically, maxes out the fan to improve cooling and Ive tested using both options. Thermal testing was completed in an ambient room. Temperature of 22 degrees Celsius so expect different results in different environments. Ive tested idle down the bottom of the graph and the temperatures were ok. Gaming was tested by playing Watch Dogs 2, as I find it to use a good combination of processor and graphics.. The stress test results are from running the Aida64 CPU stress test and Heaven GPU benchmark, at the same time to fully load the system.. Any time the CPU shown by the blue bar was hitting 95. It was thermal throttling.
. Thermal throttling was still happening even with a 0.14v undervolt applied to the CPU. As listed by UV on the graph., With the Thermaltake Massive 20 cooling pad in use, it was possible to lower the CPU temperature to 88 degrees, while gaming and remove thermal throttling. So despite the smaller air vents, the extra air or simply the act of raising the laptop up off the table is helping and the graphics also saw an 8 degree improvement here. At the top of the graph, with the stress tests, the cooling pad wasnt enough to Remove the thermal throttling on the CPU in this worst case scenario, though, the GPU temperature did improve by 7 here.. These are the average clock speeds for the same tests just shown.. We can see the clock speed of both the CPU and GPU increase. As the fan speed rises, as this helps reduce thermal throttling on the CPU, while GPU boost with the graphics favours cooler, temperatures. Were seeing the highest clock speeds with the cooling pad in use, while undervolted as the issue here was thermal throttling on the CPU, and this Best helps with that. The CPU undervolt is helping the most when it comes to improving CPU clock speeds, though, despite thermal throttling still taking place in almost all of these tests. Our improvements make it throttle less so were still able to improve performance by over 500MHz. On the CPU with these modifications., These are the clock speeds. I got while just running CPU only stress tests without any GPU load.
, With the Aida64 stress test, running it wasnt possible to reach the full 3.9GHz, all core turbo speed of the i7 8750H CPU. Even once, undervolted, due to power limit throttling., I wasnt able to boost the default 45W TDP using Intel XTU to improve this either, which is too bad. As we can see here, the temperatures for CPU only workloads are looking just fine theres. Definitely some thermal headroom there to boost the TDP and, by extension, CPU only performance, even if this wouldnt help the combined CPU and GPU workloads shown earlier, as the combination results in thermal throttling on the CPU. To demonstrate how this translates into performance. Ive got some Cinebench CPU benchmarks, here. Theres, no difference to the single core results, as this isnt enough load to cause any throttling. With the undervolt applied. The multicore result was only 40 points or so below. My usual best case result from the i7 8750H.. Here are the GPU, only clock speeds, while under a graphical only stress test, as well as the improvements seen by applying a manual 150MHz overclock to the GPU core with MSI Afterburner, and this only slightly affected the temperatures raising the average result by 1 degree.. So how do these performance boosts actually translate into games? Ive tested with the exact same Windows, Nvidia and game updates installed, the only changes were the ones listed. Here. Far Cry 5 was tested using the built in benchmark at 1080p.. At ultra settings there was a 3.
8 improvement to average FPS with the CPU undervolted and graphics overclocked.. The 1 low rose by a much larger 9.1, which would be due to the CPU clock. Speed improvement thats now possible by the throttled CPU., If youre after more gaming benchmarks, with the MSI GE75 check the card in the top right, where Ive tested 19 different games.. As for the external temperatures, where youll actually be putting your hands at idle, it was about 30 degrees, which is about average.. While gaming, the center of the keyboard, rises to the mid 40s. It was warm, but not hot, to the touch and then very similar results with the stress tests going.. As for the fan noise produced by the laptop Ill, let you have a listen to some of these tests. At idle. It was basically silent., While gaming or under stress test with the fans on auto mode. It was fairly loud just a little above average, compared to other laptops tested, while maxing out the fans with cooler boost mode only raised them slightly. Higher auto mode was already almost reaching full speed, not surprising, given the thermal throttling on the CPU thats happening in these combined workloads.. Overall, I think the MSI GE75 8RF gaming laptop is performing well once we apply some basic tweaks. However, the CPU throttling issues do negatively affect performance when under sustained load in a couple of ways. In combined CPU and GPU workloads such as gaming, the heat from both the processor and graphics seems to overwhelm the cooling solution, even with the fans at max speed, resulting In thermal throttling on the CPU, even with the CPU undervolted.
, Adding a cooling pad did help this in gaming. However, if the workload is intense enough, like we saw in the worst case, stress test, even this isnt enough to remove thermal throttling., Otherwise in CPU only loads. There was the usual power limit throttling at the 45 watt TDP, preventing the full 3.9GHz being reached, despite there being thermal headroom available.. I like what ASUS did in the newest Scar II, while it did still have a 45 watt TDP in combined CPU and GPU load under CPU only load. It was capable of running higher at 62 watts allowing it to perform better.. Yes, it does run warmer as a result, however, in a CPU only workload, its still far from thermal throttling, and I think this would have been a better option for MSI to implement, rather than just hard capping it to 45 watts, regardless of the type of load.. Hopefully, we see this in a future BIOS update.. It is worth remembering. This is the GTX GE75 model, so its a generation behind the newer RTX models. I wont know if this has been improved in the newer models. Until I get one for testing., I did notice the battery drain while plugged into the wall with the 180 watt power, brick that came with the review unit. However, the MSI website notes that this model comes with a 230 watt, brick so Im guessing the review unit. Just got the power brick mixed up over time with the correct brick, this shouldnt be an issue.
. I dont believe this caused performance problems. In my testing I only saw the expected 45w TDP limit on the CPU and battery drain seemed slow, and there was no current limit throttling something I usually see when the power brick is obviously too small.. These differences in performance shown arent hard and fast rules. There are different factors which will vary results, primarily the temperature of the room, youre running in application of thermal paste, and even the specific hardware which comes down to the silicon lottery.. You may not be able to undervolt or overclock your hardware the same as me. It depends on the chip and its specific power requirements, so dont just blindly copy my settings and do some testing to find out where your stable point is for best results.. It may be possible to further improve temperatures by swapping the thermal paste. However, as this is a review unit that I have to send back Im not able to change the paste, otherwise, the next reviewer will unknowingly report different results. Due to what Ive, done., Undervolting and raising the fan. Speed is much easier for most people to do and as we've seen, it did improve performance in the GE75 gaming laptop.. A cooling pad can help out too, as thermal throttling is the enemy here. Anything we can do to raise the laptop up to improve air flow and otherwise blow in additional air should assist.. Let me know how much of a performance boost youve found by undervolting your hardware and what you thought of the improvements here, and course dont forget to subscribe for the full review of the MSI GE75 gaming laptop as well as future thermal testing.