Problems? See this thread at archive.org.
Hello, I have an almost dead 8400M GS on an ACER 7720G.
I bought a 9300M GS to replace it and it doesn't show anything on the screen (it just seems to turn on and stay empty). The guy who sold me the card seems trustworthy and told me that it came from a 5520G, so it has ACER VBIOS (and should work out of the box).
We reflowed quickly the 8400M GS and I was able to update the motherboard BIOS to the unlocked v1.45 (black edition) with every option available, but the same problem remains.
Seeing that the 9300M GS is supported by 7720G in the 1st page of this thread (although it is mentioned as MXM-Type I, not II as 8400M GS is), what could be wrong and what could I do to make the replacement work?
Thanks a lot guys!
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My 240m gt mxm-ii is a dead one
bios chip has a crack and the solder came loose. I asked for a replacement but they have no new ones
so a refund it is!
Tapatalked! -
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Furmark is nice to check insane stability, but you better try something more useful like a game, and you'll probably see like 10*C less. 5920G has really poor cooling
Also do you have copper shim in there?
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Congrats, that's the most powerful MXM-II GPU, but also the hottest. I hope that you got yourself new thermal pads and descent paste
On theory it should be Plug'n'Play. You'll be the one who would let us know how it went, as you are the first 6935G owner to try it.
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@ dedalos91 + triturbo,
I have the same temperature with 5920 and 9600M GT GDDR3. After a while of Oblivion, I had made a peak temp of 91'C. I had a copper shim in place in my 5920, when I tried it.
The believe the heat issue is with the GDDR3 RAM. Recently I posted some findings on this, in .NetRolller 3D's 'Acer BIOS mods and discussion thread' http://forum.notebookreview.com/acer/575866-acer-mxm-bios-mods-discussion-x920g-vs-9600m-gt-93.html page 93. I found the RAM very hot. (I had the 9600M GT in the 8920 at that time.)
Also, I effectively concluded the 9600M GT core is cooler than the 8600M GT core. Since the 8920 MXM II heatsink only covers the core, I could compare core temps independently of RAM. The 9600 was about 3'C cooler all round.
Yet the 8600M GT was noticably cooler under load in the 5920, where the RAM is covered by the heatsink. (As is the DDR2 9600M GS.) The only 9600M GT/5920 option was to downclock to 9600M GS GDDR3 speeds, and undervolt from 1.05V down to 0.95V, for cooler temps. Even so, it was still hit eighty-eight centigrade in temp, with Oblivion. (I found Oblivion generally pushes GPU hardest of the vid games I have.) I know there was the option to undervolt further, but I didn't want to risk the card. Ebay's a nightmare, if I had to replace it.
Anyway, almost straight away, I put my 9600M GS DDR2 back in the 5920, and it is very cool. It's a C1 revision chip, which NetRolller says is 55nm, rather than the 65nm that the A1 9600M GT's we have. That offers a solution to try to buy a 9600M GT in C1 revision with GDDR3 RAM. I don't know if it will be any cooler, but Given NetRolller's argument it's produced in 55nm tech, it should be. It depends entirely on whether Nvidia have reduced the voltage in the C1 rev. You would expect that with 65nm -> 55nm change. Maybe they have not though. My A1 GT runs at 1.05V, and my C1 GS (lower clock) runs at 1.0V.
Same then, for the 4670's that struggle with heat. Though I read 4670's have other heating issues, like they drivers don't switch on the fans for adequate cooling. Problem with 4670 and 5920. (Don't quote me exactly on that though; it was a long time ago I read it.)
We may then criticise the 5920's cooling system, but it was probably designed for DDR2 cards. Maybe part of the weakness of it cooling is that it has a vast area of aluminium to cool. Wasted space maybe, but if it runs all that metal cool, it's cooling the air in side the laptop too.
Following on, there are other cooling options to try. A cooling pad.
I was going to post on Triturbo's 5920 page about cooling from Triturbo's sig, about what I did recently to cool. Just using a salvaged laptop 5V fan, and 5V power adapter, I rigged up my own cooling.
*** It works like a dream. *** It cut's GPU temps to very acceptable without any undervolting. Also the HDD stays cool under the palmrest. It's cheap to make and run, as it uses about 2W.
This is a photo I have of two fans sat behind an 8920.
I use only one now, and it's fine. Also, a download link, just in case. Laptop Cooling.JPG
On here you can also see the plastic feet I have under the 8920 feet. Clearly it's not finished yet. I can remove the tip from the adapter, and connect the wires. Even a USB cable could be split to use as the 5V supply direct from a laptop USB port. I put foam feet on the fan so it does not resonate on the desk. Obviously if you try this idea and like it, you can modify. Add some variable resistor to the circuit for fan speed control, make a box for the fan, etc.
Just power the fan with the power adapter, + to red, - to black. Put the fan at the rear of the laptop, so the air flow prevents heat building under the exhaust area. (Obviously not meaning to be staing the obvious.) That has to be the critical element, as the laptop is not drawing in heated air, but cooled air.
Additionally I have extra rubber feet under the laptops rubber feet. (That alone cuts temps by a degree or two, if you don't add the external fan.) -
@u6b36ef - I say 5920G has poor cooling because even with T5750 (2,0GHz, 667MHz FSB) and HD3470 it was inadequate to cool them, high 80's were rarity, 90's most of the time. Those are pretty high temps, so I can't call it a normal running one. That's a nice mod you got there, but I like completely internal mods, in order to keep the portability
@botexnet - It should, but one can't say definite yes, or no, when it comes to MXM upgrade.
@popek189 - MX-4 and Phobya XT. It's GDDR3, hence why the max amount of vRAM is 512MB, and the 1GB version is DDR2. GDDR3 has different BGA package than DDR3. Means you can't desolder one module and replace it with the other if you want to increase the amount of vRAM. If I recall correctly DDR3 wasn't available at the time, it was only GraphicsDDR3 with max amount of 1Gbit per module, which is 128MB and HD4670 has 4 modules, so 512MB
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Sure, everything helps. As I said, mine was even lower spec'ed, so there could be a difference in the cooling. I don't know, but maybe even different MoBo revisions. Anyway, for most of the owners it's pretty hot, because I saw it quite a handful of times to be nicknamed - oven
Count yourself happy
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Every GPU is for itself, as well as the machines, but most of the times ATi has better compatibility. For example HD3650 works on virtually any machine out there
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@u6b36ef - Thanks. My heatsink's sticker is long gone, I think I keep it somewhere, but I'll have to dig pretty hard
I had SUNON fan, but it's broken since I dropped the laptop while it was running
Thankfully only the fan was damaged (sounds like a jet engine, damaged bearing I guess) and I have a few spare to replace it (not SUNON though)
@Kanchata - I think that MXM-Upgrade were selling those at one point, like a non-performance "cheap" (for their standards) replacement. I was trying to find the article, but no luck. I'm pretty certain that they tested it on 5920G, so it should work on yours as well. -
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Ok I understand, thanks
im going to search one mxm card for upgrade mine, one more question? my 8600 gs 256 is in idle, 76ºC and playing in example Orcs must die it jumps to 102º,pretty much hotter.
i have cleaned the fan and heatsink, maybe i need to put some new thermal compound?
Advices for cooling it a bit?
Acer MXM Models and Cards
Discussion in 'Acer' started by TehSuigi, Jul 4, 2009.
