Overheating meanwhile repaired with a can of pressured air. Sandybridge fps numbers vary from capped 60 fps for easy scenes, set as limit in game, to as slow as 12-15fps for complex scenes (snow, more complex lighting effects). That is with: Full HD, texture quality highest, shaders high, but particles medium. Last time I tried particles high looked wonderful, but was very slow, but back then I had also overheating issues, may try it again.
This is on ThinkPad T520 with Intel i5 Sandybridge dual core with hyperthreading:
$ phoronix-test-suite system-info
Phoronix Test Suite v5.2.1
System Information
Hardware:
Processor: Intel Core i5-2520M @ 3.20GHz (4 Cores), Motherboard: LENOVO 42433WG, Chipset: Intel 2nd Generation Core Family DRAM, Memory: 16384MB, Disk: 300GB INTEL SSDSA2CW30 + 480GB Crucial_CT480M50, Graphics: Intel HD 3000 (1300MHz), Audio: Conexant CX20590, Network: Intel 82579LM Gigabit Connection + Intel Centrino Advanced-N 6205
Software:
OS: Debian unstable, Kernel: 4.3.0-rc4-tp520-btrfstrim+ (x86_64), Desktop: KDE Frameworks 5, Display Server: X Server 1.17.2, Display Driver: intel 2.99.917, OpenGL: 3.3 Mesa 11.0.2, Compiler: GCC 5.2.1 20151010, File-System: btrfs, Screen Resolution: 3840x1080
(I use only the bigger external screen for PlaneShift while PTS shows the combined resolution of laptop display + external screen.)
I expect PlaneShift to play completely smooth with Intel chipsets beginning from Haswell onwards, maybe even Ivybridge. I expect it to fly with Broadwell or even Skylake. At least in Full HD. Since Hi-DPI display have up to four time the resolution, I am not sure about these, but Full HD I expect to be definately playable. Well except for low fps spikes with Sandybridge its even playable there, maybe not best for PvP, but as I do not engage in PvP it is no issue for me.
Also CPU usage of PlaneShift client dropped considerably. Often only about 20-40% of one core occupied. Dunno whether thats due to improvements in the Intel driver stack or in the client. It used to fully occupy one core with the PlaneShift client process.
I welcome any figures for Ivybridge and later chipsets. I expect it to be quite playable with Intel drivers there. I´d also expect free software radeon drivers for mid range APUs and gfx cards from AMD to work well enough, but as I do not have any experiences, I do not know for sure.
As soon as I have some Skylake laptop I report back. I expect it to fly there.