about XPS 16xx. can they just do like sony, give us a lower frequency GPU and memory bios version?

just like my sony laptop FW510f, it have the ATI 4650, but the GPU frequency is 450 and memory is 600. i think dell can do like it to avoid the fan's noisy(its runs when i press the start button), and the throttling problem.

BTW: my 1647's fan keep spin and the gpu temp is 50 when its idle, is it normal? the ambient no more than 20c

 

who would want an underpowered gpu tho?

 

avoid the fan's noise and the throttling problem.

 

You can turn off ATI Powerplay in the ATI control panel. This pretty much has the effect of greatly reducing the maximum clock speed, with greatly reduces gaming performance (in one case it caused me to go from 125fps down to less than 30). Not sure that the graphics card will have much of an effect on the fan speed though when not in a gpu intense application.

 

In terms of the temperature, 50 C is normal. My CPU, GPU are both 50 idle.

 

my gpu is 50c and cpu only 33, so i think its the problem of the gpu, thank you for ur help, i try first.

 

did your fan spin all the time? i mean, in the most idle time.

 

the fan doesn't spin when idle. Only when you start putting some stress on the system e.g. shaking a window around wildly.

 

50C for both CPU and GPU in idle is HOT.

 

50C when idle hot? Probably, but it's not bad for a quad-core i7 XPS 1645 (especially for one with the upgraded processor and screen).

 

My graphics seems to stay pretty much round the 50 mark when idling, giving us a lower rated card is silly seeing as we can use powerplay, if you want you can go even further since it was discovered a while ago that certain programs can change the clock speed.

Giveing us a lower clocked card would mean we'd have less headroom since our chips are identical to the sony ones, it's just that ours are the ones which accept higher clocks better. Given the choice would you rather have the option of high clocks or not?

On the other hand my CPU temps vary a lot more, idle is usually around 40 (will be less in a day or so when I replace the pads with MX-3 and clean out the heatsink). When it was brand new it would idle at about 36 so hopefully with the new thermal grease it should be more like 32 or so, enough to keep the fans off most of the time anyway. Undervolting doesn't make a difference when idleing as the processor is usually running on its lowest clock speed, the default for which is already as low as RMclock will let me go, so I only bother running it when I'm doing something which might tax the CPU a bit more or when gaming. If I game heavily then I can hit the TJmax in about half an hour (91*C), I never used to get beyond about 80 when it was new, this is without undervolting bear in mind, when I undervolt I usually stay cool enough to keep playing indefinitely.

 

@funky monk
your GPU doesn't throttling when it hit 90c?

 

unless you overclock or you live in the Sahara desert, its near impossible to hit even 88 C. My stress tests when mildly overclocked hit 87 C max (Furmark, with burning effect)

 

I don't think it's my GPU which throttles, since that usually stays at around 70, also my whole system runs like crap afterwards for a while which would definitely suggest it's the CPU which is throttling. Also for a start I've never seen my graphics get beyond around 80 as far as I can remember.

I can attest to that, I doubt I'll get over 91 though as it throttles like crazy (enough to go from a fluid 50-60 FPS in TF2 down to about three). Bear in mind that I probably have some stuff crusted up in my fan plus six months of dust, also your laptop has a newer layout designed to help with the coolin iirc. Either way I'm changing the thermal pads for MX-3 in the next day or so.