Nvidia GeForce GTX 1080M Not As Fast As The Desktop Version – Less CUDA Cores, No GDDR5X
Nvidia might be launching the GeForce GTX 1080M in August, but notebook manufacturers have already started adjusting their new systems for optimal performance with the new Pascal based GTX 10-series of graphics cards.
According to a new leak, Nvidia GeForce GTX 1080M could have 2048 CUDA cores, 128 TUs and 64 ROPs on board. The CUDA core count is less compared to that of the desktop version which is 2560. Based on the new Pascal GP104 SKU, the mobile version of the GPU is also likely to feature a lower TDP – closer to 145W – than the desktop version.
The GeForce GTX 1080M specs detailed in these leaks aren’t in line with a previous report which claimed the GTX 10-series for laptops won’t be cut down by Nvidia, rather it would feature the same core configurations, memory controllers, and boost clock speeds as the desktop version.
This latest leak suggests that the GeForce GTX 1080M could run at a core clock speed of 1442 MHz and a boost clock of 1645 MHz. For reference, the desktop version runs at a default clock speed of 1607MHz.
Further, the mobile version of the GeForce GTX 1080 is rumored to feature 8GB of GDDR5 video memory – instead of the GDDR5X – which will be clocked at 8000 MHz compared to the 10,000 MHz memory clock of the desktop counterpart. Both less GPU clock speeds and less memory clock will help conserve battery life in mobile devices.
Last but not least, the memory bandwidth of GeForce GTX 1080M is rated at 256GB/s, which is slower than the desktop model’s 320GB/s.
Nvidia is expected to officially announce the mobility GPUs of its GTX 10-series in the first week of August. Stay tuned for more updates!