Recently switched from IB's TWS to TDA's TOS. Immediately noticed some lag in TOS. E.g., pop-up windows are slow to pop-up and slow to go away. When typing in chat, I can easily outrun the characters displaying on screen. No lag in other apps or in TWS. Running a Dell XPS 8700 spec'ed as follows: CPU: 4th gen Core i7; Haswell architecture (launched back in 2013) RAM: 32gb DDR3 integrated graphics: Intel HD Graphics 4600 discrete graphics: AMD Radeon R9 270 with 2gb video RAM storage: 480gb SSD for Win7 and apps, including TOS displays: 5 x 24" monitors at 1920x1080 resolution. 2 of these are connected to the integrated graphics (via HDMI and DP), 3 are connected to the AMD card (via HDMI, DP and DVI). OS: Win7 When I chatted with TOS support and sent them a log, the rep said it was video resources that were being stressed and suggested I reduce the number of windows/charts. He assumed that I didn't have a discrete video card, but I pointed out that I do, and he reiterated suggestion to reduce windows/charts. I'm running about what I had in IB TWS w/o lag. Could be that TOS is more of a resource hog. Any suggestions on speeding things up, apart from reducing windows/charts? Any non-hardware tweaks? I've already increased the min/max RAM to 4GB/12GB. And the memory usage in TOS Help tab is nowhere near the available memory. And I've seen online mentions by people running TOS w/o lag on machines with 16GB of RAM, so that also leads me to conclude that system RAM isn't the limiting factor as I have 32GB with 12GB allocated to TOS. I would guess that displaying 2D charts and tables shouldn't be too much work for a graphics card, even one that is several years old. I notice a lot of people only use the discrete graphics, even if that means using more than one graphics card. Could it be that my use of both integrated and discrete graphics simultaneously is the issue?