All of these 2011 AMD based systems are JUNK. They fail the same way the NVIDIA 8600 did in 2007/2008, just they took longer to fail. My fume extractor gets good and busy inhaling smoke from all the dead HD 6750M I am replacing everyday in my office.
You can fit an 820-2849 In there, BUT it is a downgrade in CPU. It is this downgrade in CPU power that actually saves you. The 820-2849 has a dual core CPU compared to your 820-2914 board's quad core, which produces less heat. Do keep in mind that this dual core CPU board has the SAME COOLING SYSTEM AS YOUR QUAD CORE CPU BOARD because Apple is clueless when it comes to proper thermal design.
The 820-2849 also has a GPU that is NOT a piece of crap like the 820-2914's HD6750M that will not keep failing. Keep in mind that the combination of crap AMD HD 6750M GPU + quad core sandy bridge processor is what is killing that GPU to begin with. Even if the HD 6750M wasn't junk, it is paired with one of the hottest running mobile processors of the past five years which will kill it just by sharing a heatsink with the GPU.
You already have a bad GPU and a bad cooling design. Put a QUAD core sandy bridge processor of the 820-2914 board you have in that system, instead of the DUAL CORE processor of the 820-2849 board in there, and you have a recipe for disaster. What Apple was thinking when they made this is beyond me, but it definitely wasn't that you would have a working machine 3 years from your purchase date.
The right thing to do is to keep killing it within the 90 days by running GPUtest & furmark until they give you a retina for free. It works, and is what they deserve for taking $2000+ of your money and giving you this pile of junk. Be kind and courteous to them while insisting that this canot keep happening because you use the laptop for work. They do not have classic unibodies to give you as replacements, so they will replace it with a retina which is a far better and more reliable machine.
If you want to mess with putting a different board in there, you can put an 820-2849 and it will be fine. It does not share any of the lvds_mux issues or the kernel panicing because of dropping VRAM pgood signals of the 820-2850. But in this case, you are paying for a downgrade.
The right thing to do here is to keep killing it natrually and keep bringing it back to Apple until they give you a retina.
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How many time have you brought it to Apple (Apple Store or Authorized Service Center) and how many logic boards have they installed?
Dan tarafından
Can you give us an idea what you do with your system. Are you watching a lot of You Tube vids or other video (streaming or iTunes)? Are you editing pictures or doing any 3D object design?
Dan tarafından
This will be the third time logic board will be replaced.
I use it for medical imaging (extensive 3D rendering and large data sets). It ran this task for years without problems. It spends 90% of it's time on a stand supplying a cinema display external monitor. Strangely, the medical imaging it performs runs fine. It has previously crashed when I'm looking at youtube or vimeo (flash video?) and it felt hot at the time.
The university apple service center I bring it to say this is so common they can't believe Apple haven't recalled these models. They told me I'm likely to be going back and forth with them replacing the logic board with original parts forever.
I'm in a position to do this so if it costs Apple more than the cost of a new MBP then I'm happy as they should know better and sort this issue once and for all.
I disagree what you said how common this is .... I speak to so many students at the university here that have similar issues for these 2011 models.
I will look at temp app for future.
Steve J tarafından
OK, that may explain things. You Tube & vid streaming uses more processing which creates more heat. If the system stays in this hot zone for long periods it can weaken the solder joints of the CPU & GPU and can lessen the life span of the system. When we get a new system (we buy used systems) we strip it down and redo the thermal paste as the quality of the paste Apple used is not as good as what you can get today and we give it a good cleaning if needed.
Dan tarafından
Make sure your systems vents are clear and try using gfxCardStatus ability to control which graphics services to use. I would recommend forcing it to use the AMD Radeon HD 6750M and watch your temps & RPM's. Temperature Gauge Pro offers a logging function to track things see what happens over a few weeks of your normal usage and let us see the log.
Dan tarafından
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