AMD Radeon 780M iGPU On Ryzen 8700G APU Overclocked Up To 3300 MHz: Over 60% Better Performance, 177W Peak Power

AMD's Ryzen 8000G Desktop APUs feature the fastest iGPU on the planet but SkatterBencher has made this RDNA 3 chip even faster through manual overclocking, gaining an impressive graphics performance uplift of over 60% with an outrageous amount of power.

The AMD Radeon 780M iGPU isn't a new integrated graphics solution. It's been around for over a year with its first release a year back with the Phoenix "Ryzen 7040" laptops. The iGPU was refreshed for the Hawk Point "Ryzen 8040" laptops with the first products shipping this month and it also made its desktop debut a few weeks back with the AMD Ryzen 8000G APU family on the AM5 platform.

In our review, we found the AMD Radeon 780M iGPU for desktop to be a very good entry-level graphics solution for budget PC builders with performance matching some of the most popular entry-level discrete graphics cards such as the GTX 1650 and overclocking it brought it close to the GTX 1650 Ti. However, extreme overclocking results have now been published by SkatterBencher which show the full performance capabilities that can be achieved with this chip and the results are very interesting.

To set a baseline, the AMD Radeon 780M iGPU was first tested in stock configuration and reached an impressive 2881 MHz with a peak power of 49.8W. This is what most users of the AMD Ryzen 7 8700G APU will be getting out of the box from the chip. To overclock the chip, the first thing that is done is to enable XPM mode (DDR5-6400) and enable the PBO 2 mode which helps the iGPU gain a slight advantage with a peak clock of 2903 MHz (1.063V) and a peak GPU ASIC power of 68.5W in the 3DMark Stress Test and 2882 MHz (1.141V) with a peak consumption of 138.4W in OCCT. This helps the chip gain a maximum performance uplift of +26.3%

AMD Radeon 780M iGPU 3300 MHz Peak Clock (Image Source: SkatterBencher):

The second overclocking method is to manually tuned the PBO 2 to a achieve higher chip voltage operation which led to a peak clock of 3099 MHz (1.200V) and a peak GPU power of 82.6W in the 3DMark Stress test and 3053 MHz (1.200V) and a peak GPU power of 159.0W in the OCCT stress test. This led to a performance uplift of 28.9% in gaming benchmarks such as Tomb Raider at the 1080p resolution.

AMD Radeon 780M iGPU 177W Peak Power (Image Source: SkatterBencher):

The third overclocking method was to manually overclock the chip by adjusting the FCLK, UCLK, MCLK, and GFXCLK. The FCLK was adjusted to 2500 MHz, MCLK to 3400 MHz (DDR5-6800) & the UCLK was adjusted to 1700 MHz. The graphics clock was manually tuned to achieve a peak clock of 3131 MHz (1.200V) and a peak power of 84.4W in the 3DMark Stress Test and a peak clock of 3086 MHz with a peak power of 155.6W in the OCCT stress test. This delivered up to 39.09% in the same tests however manually overclocking the chip also boosted its AI performance by a significant margin.

The next step was to overclock the CPU itself with the GFX clock set to 3150 MHz. This netted similar results as the previous overclocking strategy with a very small .5% uptick in performance. For the last overclocking technique, a simple memory tune was tested with the DDR5 modules set to 7800 MT/s and tighter timings. This led to the single largest gain in performance with an average uplift of +37.75% over stock and up a +61.14% gain in tests such as Furmark at 1080p. According to the overclocker, it's not faster memory that improves the performance but its tighter timings which helps the iGPU gain better access times.

Overall, this shows that there's a lot to gain from overclocking and tuning the RDNA 3 Radeon iGPU featured on the new AMD Ryzen 8000G APUs. Faster memory does bring the biggest performance jump and we can hope to see even better higher-bandwidth solutions with future generation of APUs.

News Source: SkatterBencher