Hey man! I have flashed a lot of motherboards, video cards and other hardware over the years with CH341A+SOIC clip. The symptoms are like this: very odd connection with errors (but at the end the software find the chip), I can read, I can erase, I can flash, but I can not verify (the error come at the first moment). And the result is: the machine start, fans spin, 2 leds, but not chime and boot. So, 2 situations I can think off: 1. The first dump backup is not OK (maybe then gurus here can help me with that) 2. The dump is OK, but I can not flash correctly. One thing is sure: eeprom chip firmware is bad.
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iM 4,1-14,4 iMac 2011 (see more) UEFI Firmware Mod
- Thread starter StephN999
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well, it is a standard Macronix MX25L3205D 3.3v 32M-BIT eeprom chip, should be easily flashable with the CH341A.
You can try manually selecting the model (instead of auto recognize by software). BTW, which software are you using for flashing ??? I've seen some weird cases where AsProgrammer fails but flashrom succeeds on flashing (I've seen this happen on SST chips in 2010 iMacs, but never on Macronix).
Also you can try disconnecting all cables and from logic board before flashing, maybe that helps too.
I finally did it. I changed the CH341A programmer and computer and used SigeriaProg v1.45. Auto set and everything OK. After I put all the harware back, at boot, series of 3 beeps, non stop. I turned it off manually 2 times. The third time I heard the lovely chime and all is well. I want to say a big thank to those who tried to help me! I really apreciate!
Some interesting stuff:
forums.guru3d.com
github.com
I already enabled re-bar in some old rigs with AMD GC, but I wonder if is not possible on old Macs.
Performance for Free: Unlocking Resizable Bar for unsupported AMD GPUs (Polaris, VEGA, Radeon VII)
AMD decided to introduce the ability to utilize Resizable Bar (if you're on the intel platform) or Smart Access Memory aka SAM (if you're on an AMD...
forums.guru3d.com
GitHub - xCuri0/ReBarUEFI: Resizable BAR for (almost) any UEFI system
Resizable BAR for (almost) any UEFI system. Contribute to xCuri0/ReBarUEFI development by creating an account on GitHub.
github.com
Some interesting stuff:
Performance for Free: Unlocking Resizable Bar for unsupported AMD GPUs (Polaris, VEGA, Radeon VII)
AMD decided to introduce the ability to utilize Resizable Bar (if you're on the intel platform) or Smart Access Memory aka SAM (if you're on an AMD...I already enabled re-bar in some old rigs with AMD GC, but I wonder if is not possible on old Macs.GitHub - xCuri0/ReBarUEFI: Resizable BAR for (almost) any UEFI system
Resizable BAR for (almost) any UEFI system. Contribute to xCuri0/ReBarUEFI development by creating an account on GitHub.
I guess this may work, some people seem to have succeeded in making it work in Sandy Bridge.
All that seems needed is adding the ReBarUEFI .ffs to firmware. Also check if memory space in windows need DSDT modding (maybe the already existing audio ACPI patch fixes this), and have to check also if 4G decoding is enabled (otherwise I may need to see how to enable it).
Maybe this can also be tested at first from OpenCore without the need of firmware modding, I think I saw some options in Opencore about Resizable Bar, and vit9696 is listed as a contributor to the ReBarUEFI project.
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I use in hackintosh's OC re-bar options, but is more to allow booting MacOS with 4g+rebar enabled in BIOS (re-bar for windows). I think those patches, like you say, can be inserted in OC config (including DSDT patches).
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Great!!!
What brand and model are the memory modules ??
Also, if you can run windows, can you please post spec captures from CPU-Z and Thaiphoon Burner, like in this post ?
Thanks to @Ausdauersportler and @Jazzzny there is now a firmware mod that enables native USB3 booting if you have a Thunderbolt dock or PCI card.
Also, you can add free UEFI file system drivers like ntfs if you'd like to boot natively from unsupported file systems. I have tested this from OpenCore, but not yet injected into firmware.
Also, you can add free UEFI file system drivers like ntfs if you'd like to boot natively from unsupported file systems. I have tested this from OpenCore, but not yet injected into firmware.
Я добавил драйвер NTFS_X64.FFS в прошивку. Работает флэшка с форматом NTFS. Поддерживает NTFS!
I added the NTFS_X64.FFS driver to the firmware. The flash drive is in NTFS format. Support NTFS!
If you want to buy it for the machine in your signature, you can't. Wrong CPU socket. And no Mac of any description, as far as I am aware, plays well or even maybe at all with -K suffix processors.I want to buy an i7-4790K processor.
But I don't know how to properly modify the BIOS. Who can properly modify my BIOS for i7-4790K?
-K processors work fine on 2011 iMacs, just at their non-overclocked speeds. A firmware patch will be released soon to unlock turbo overclocking in iMacs with Sandy Bridge CPUs.
Hi guys! Me again.......... In one iMac 27 2011 I have putted AMD WX7100. All OK. After that I started to patch the iMac firmware. In a certain moment, the NVRAM became corupt and I can not boot without Command-Option-P-R. I have tried all. Restored default firmware on both. Different firmware on WX7100. Changed memory. Sonoma and Ventura..... Different OC, OCLP. Maybe you can help me. Thanx!
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After NVRAM reset (Command-Option-P-R) I can boot to Ventura/Sonoma. But if I reboot again, I have KP. And I need to reset NVRAM. Meanwhile I reinstalled the genuine graphic card and all is OK. So, the culprit is WX7100. I will program it with CH341A and see if any changes. I'll keep you updated.
Hey guys! I need your help again. I have 2 iMac 2011. First with WX7100, second with WX4150. All OK until I started to try this firmware patches. I need to reset NVRAM after each reboot or boot, if not I have KP and automatically reboot in recovery. Both iMacs have installed Sonoma, Windows 11 and one of them Ubuntu 22.04. I reflashed the original firmware, but the problem persist. What should I do?
Anybody had this problem? It is a little bit strange that I'm the only one with this problem on two iMacs.
Update: the culprit is OCLP root patch. If I remove the patch, I have no problem booting. Now I install Sonoma beta to see if the issue persist. If yes, I'll try Ventura and lower. Maybe the OCLP devs should know about this.
Anybody had this problem? It is a little bit strange that I'm the only one with this problem on two iMacs.
Update: the culprit is OCLP root patch. If I remove the patch, I have no problem booting. Now I install Sonoma beta to see if the issue persist. If yes, I'll try Ventura and lower. Maybe the OCLP devs should know about this.
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OCLP development will not support broken iMac firmware updates. There is a risk associated with this procedure, if you experience problems you are on your own.