NVIDIA RTX 3080 and RTX 3090 graphics cards are getting seriously hot in Ethereum mining.The popular hardware monitoring tool HWInfo64 has received version 6.42, a new update that adds support for GDDR6X Memory Link Temperature.
In this way, those with a GDDR6X equipped Ampere card such as RTX 3080 or RTX 3090 can control the VRAM temperature. According to the news of Tom’s Hardware, it did not go unnoticed that the RTX 3080 and RTX 3090 graphics cards saw a temperature of 110 degrees during Ethereum mining during the tests.
On the other hand, looping the Metro Exodus game on an RTX 3080 Founders Edition at 4K Ultra settings for a few minutes causes the GDDR6X modules to reach a peak temperature of 102 degrees. The maximum temperature for GDDR6X should be 95 degrees here.
The situation changes when DLSS and Ray Tracing are enabled. Playing Metro Exodus at the same settings, the RTX 3080 reaches a maximum temperature of 94 degrees. In addition, when tested on an RTX 3090 Founders Edition, while Cyberpunk 2077 with DLSS and Ray Tracing enabled, GDDR6X temperatures reach 100 degrees.
When mining on both the RTX 3080 and RTX 3090, it seems that the GDDR6X modules peaked at 110 degrees, and the GPU lowers itself drastically to compensate for the extremely high VRAM temperature. It is also among the information that this occurs in different cards of various vendors. It’s also a separate issue that this is before implementing any overclocking settings that some miners like to do to chase down every bit of the hash performance.
It is pointed out that there are ways to lower the GDDR6X temperatures that cause the 3080 and 3090 to be throttled only when the temperature reaches 110 degrees. It is stated that MSI Afterburner is used to reduce the GPU and GDDR6X clocks as much as possible (-450 MHz in the core and -502 MHz in RAM) but it does not work very well. After a few minutes, it is stated that the cards still dropped to much lower GPU clocks (about 900-950 MHz) but that was still enough (95 MH / s) for mining performance. Reducing the power limit to only 60 percent allowed VRAM temperatures to drop to 90 degrees, but then mining performance dropped to around 60-65MH / s.
It is a question of how these high temperatures will affect the cards in the long term. From Nvidia’s point of view, this seems within tolerance, given that GDDR6X memory runs at 100 degrees or less in the game. It is possible that 24/7 mining with memory working at 100-110 degrees will cause early card failure.