I posted the below on the hotdeals but I cut n pasted here. What I found with the other bioses on techpower was I could not get my memory past 725. Once I used the MSI XT bios it was 620/750 stable.
I only used catalyst drivers 6.5. I noticed that all the bioses that I used were dated november. My main concern with the october versions was that I new this card was using the new layout and I was unsure using the older bios was wise. It appears its working great for you so that's new information.
Regarding the memory cooling I noticed when I removed the heatsink that the pads stayed attached to the heatsink. The pads are similar to what is used in the newer AC Silencers. I'm not a thermal expert but I would think the removal/install did not loose me to much.
I'm in the same boat as far as 3rd party cooling. I hate to say it but the OEM one is the only one that will exhaust the heat outside the case. The zalman models look good but no exhaust. Even artic cooling does not have a compatible silencer for the x18(9)00 cards in the retail marked (only for oem).
Post on Hotdeals:
Last piece of the puzzel!!!
You need the MSI X1800XT Bios! On my card no other bios would allow past 700mhz on the memory. I'm happy to report I received the MSI X1800XT Bios from BIGD and I flashed my card to a true MSI X1800XT. No Pending Issues now and my memory is clocked to 620/750 via the default OverDrive.
My CYA: As always flashing, overclocking, and/or modding your card is a risk. If you cannot afford the loss do not proceed above. Someone looking for a guaranteed XT should buy an XT since overclocking is not guaranteed.
Before Proceeding I would make sure your current MSI X1800XL card works at the advertised speed (500\500) with a few loops of aquamark, futuremark, glexcess, and/or combination with ATI Tool artifact tester. You can download ATI Tool here: ATI Tool 0.25 Beta 14 from www.techpowerup.com
This way before flashing you don't add complication if your card is faulty out of the box, can process an RMA if needed since you have not voided the waranty, and/or could troubleshoot driver/system related issues before the flash.
I will also leave it up to others if testing your card at 600/700 with GPU set to 1.3v via ATI Tool is necessary before the flash. I would lean towards this approach since it's very difficult to flash back if you cannot get into windows with those clocks and follow the procedure below for a reflash. The reason being is you cannot set it back to 500\500 via overclocker which makes the flashing process possible (or less difficult). I did not experience an issue getting back to windows but I don't feel comfortable saying everyone will have the same success😉
So here are the complete steps to flash from a MSI X1800XL 512MB card to a MSI X1800XT:
1) Download ATIFLASH.
ATI Flash from www.TechPowerup.com
2) Make a bootable disk via DRDFlash:
DRDFLash from www.bootdisk.com
3) Copy the extracted (unzipped) ATIFLASH and MSIX1800XT bios from my website to the disk you created in step 2. So you should have ATIFLASH.exe and MSIX18XT.bin (rename if necessary) in the root of your A drive:
MSI X1800XT Bios from Torchedpc.com
4) Reboot your computer
5) When your system boots to the floppy type in this command to save your current bios: atiflash -s 0 oldbios.bin
6) Type in this command to flash the new bios: atiflash -newbios -f -p 0 msix18xt.bin
7) Reboot your computer if successfull
8) Load into windows, install the ATI drivers if not done so previously, launch ATI Catalyst Control Center, Select Advanced View, Select Overdrive and select unlock if you want it to run at 620/750 in 3d mode.
Thanks again to BigD from techpowerup for the bios.
If you have already flashed your bios to an XT Bios and you want to revert back to your saved original bios, or to another XT bios, perform the following:
1) Use oveclocker tool to set 2d GPU/Mem to 500MHZ within Windows.
Overclocker from www.techpowerup.com
2) Use winflash to flash back to the original XL bios of 500/500. If you didn't back it up here you go:
MSIX1800XL Stock Bios from Torchedpc.com
3) Reboot when prompted and use the ATIflash method above again with the default ( atiflash -newbios -f -p 0 msix18xt.bin or oldbios.bin) or a new XT bios ( atiflash -newbios -f -p 0
newbios.bin.
Not following this order will cause a screen corruption and flash failure. The flash failure locks up your machine but does not bork your card at least in my experience.