Ambient will be measured from the air around the video card, the core is of course the video card's core temperature.
Those temperatures are plausible, and nicely low too, especially the core.
Is the video card FAN on default speed, or have you upped it at all? Lots of questions I know, but just helps me FIGURE out just how good this case is at cooling.
And, you say GTS - is that right? Only, in your system specs you say GTX. Depending on the card those are either quite low, or very low temperatures.
Enjoy Rivatuner by the way, lots of advanced tweaking options there. I use it to control my video card's fan and clock speeds - definitely a very useful program, hopefully you'll find something to use it for, if not now, then maybe some other time.Stock fan speed and it's the EVGA 8800 GTS 512M...Here

Actually i haven't tweaked any of the fans at all since it's been built. Doesn't seem they need to be.
I am however starting to play around with RivaTuner a bit...now that i've figured out how to properly save the hardware profiles for fast switching...a fun tool indeed.

I'll run some more stress-type tests and post some temps for reference sinci i can GET them all now.
Can't understand why SpeedFan won't do some GPU's but Riva is probably more accurate anyways.

Seeya.

P.S. Edited Specs...Thanx.Thanks for the info.
I'm going to work on a FAQ to automatically control fan speeds with Riva, I used to sue a profiles based method but now I use a much better automatic system that's not very well documented, but is already in the program.
I agree it's odd that Speedfan can't grab your GPU temps, but Riva is a better program for that IMO, as it's got so much more FUNCTIONALITY relating to the video card than Speedfan.Good deal,
I look forward to seeing that.
Most of my time lately has been on customer's machines...i haven't really had time to finish setting up the New Build the way i want it but all good things are worth waiting for...Update/,ega bump: I ended up grabbing an Antec 900, just spent a few frustrating hours moving my system.
Partly my FAULT, but the lack of documentation in certain areas didn't help.
I grabbed Akasa fans to replace the LED Tri-cools and left the 200mm on top. Nice and quiet, very sturdy, and I like the look of it except for the window and remaining LED. My GPU is now 4 degrees cooler under load, which means the fan doesn't spin up as fast, so it's quieter - a definite result.
Edit: also, because it's now on my floor instead of my desk, if I open a window the cool air goes straight in. I opened it for a minute or so and my GPU dropped another 3C.