thinkpad puzzle, choose T400 or T500? Choose P600 or T9550? Are independent graphics very hot?

The machines I own are x60, t60p, t400, and x200

The X60 has a terrible heating effect, a weak fan, the palm rest is simply torture for a long time, and a dim screen. The speechless resolution has been thrown into the corner.

My favorite is the t60P, 14-inch, ips screen, 1600*1200 resolution. It’s very fun to watch and work. It works first-rate when opening multiple windows. Although the core temperature is as the core owner said, it can easily reach 70~90, but I really can't sense the temperature. Is it possible that the poster's fan is blocked and cannot dissipate heat? Later, the graphics card burned, so I bought a t400.

My t400 is a p8600, 5G memory, 64ssd 320 solid state drive, dual graphics cards, 1400*900 resolution. It is my work computer. I am a programmer. Compiling code is not slow at all. Before I also looked at the t500, but because I moved a lot, I decisively gave up the t500 and bought the t400. The CPU temperature rarely exceeds 60 degrees, even when I run the winrar performance test. The normal level is about 50, and when I switch to the integrated display, it is about 40. One day at a time with the t60p, the integrated display is turned on, not to mention the heat. It is simply cool. I am very satisfied. The CPU can be removed. I removed it when cleaning the fan dust. The company I commute to and from get off work is an hour away from home, and I often carry it. I had back pain, and then I bought an x200. The CPU was the same. Because I was very satisfied with the CPU of the t400, so I bought an x200 with the same CPU. The CPU rarely works at full load, usually under 50. In this era, CPU When there is excess, it is not much worse than I3, because there is no need to pursue CPU. Of course, you can buy t9550 to replace p8600, but good heat dissipation is wasted. Compared with performance, I prefer a quiet and calm computer, and the game is still left to Desktop computer.

I also compared the p8600 and the t9550, and found that the difference in running scores was between 10 and 15, which was completely invisible in actual use. I was surrounded by i5 and i7 computers, but there was no one. The computer runs faster than me, why? Because upgrading SSD (400mb/s) feels stronger than upgrading CPU. Can I7 give you a boot speed of more than 10 seconds? The bottleneck is IO reading and writing, not CPU.