List of working motherboards #11
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Huananzhi X99-TF Registry editing is required to allow drivers to enable the ReBar.
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Would my Z97-Pro be considered working? I haven't tried the 16GB patch (only tested to 8GB), but it needs the replacement of the older 1204 NvramSmi module and the PciBus UEFIPatch to work. The GPU tested is the Intel Arc A380 (will test the A770 once I get a replacement power supply). |
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@Tokobotenkai anything 4GB or higher is considered working but if you find a larger size doesn't I can add a note |
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Hi, i have z270 m7 with 7700k. my motherboard has 4G decoding in bios. i also have gtx 1080. how to patch my bios? |
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@EDK-Rise GTX 1080 doesn't support resizable bar |
@sidex15 But can you actually check what a name of this board?, im trying figure out how to patch mine X79, checking whats the difference between them, maybe i will find something. Or even better, save a bios file, and upload here. |
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@aquamacho1 I just followed the X99 guide from Miyconst and use Enabling hidden 4G decoding... |
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@sidex15 This is awesome, thx. I will just buy this mobo then :), im just kidding. |
Add to note that macOS(Hackintosh) didn't boot after enabling Rebar.. |
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@sidex15 I think macOS doesn't support large BARs not a problem with the bios or anything |
Yeah i'm using opencore 0.8.3 even with resizeapplegpubars set to 0 won't even boot to macOS... |
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ASUS Z170-WS & Intel ARC A770, BAR size set to unlimited and the full 16GB worked Also works on a ASUS Z170 Sabertooth MK1 |
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MZ32-AR0 (rev. 1.0) +ARC A380 +TESLA M40
(A380 has a 43 code after installing any driver later than 31.0.101.3277 on my platform. I don't know why Tesla M40 has "large memory range" by default. Does that mean there is a white list inside the bios for some rebar cards? ) After inserting ReBarDxe.ffs and running ReBarState.exe BAR size set to unlimited :
(A380 works with the latest driver after doing these. A small issue i found is that Intel® Arc™ Control refuse to start. ) |
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@gyhmz Tesla M40 doesn't have ReBar it just has a large BAR by default. |
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I can confirm it works on a Supermicro H11DSi-NT (tested with bios v1.3, should work with the v2.4 as well). Tested with a 4090 FE. No patches needed, 256GB ram installed. Thanks a lot for making this tool.
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@Tokobotenkai Hey! Do you mind sharing modified bios for z97-pro, please? |
There you go: https://drive.google.com/file/d/1yZb9LkaTvvBjAkJfGSO-hPgm2L_W9SWH/view?usp=sharing I have random issues where my keyboard and mouse is not detected on boot, not sure if it is a dying USB or a BIOS issue though. |
@Tokobotenkai I have them on my Hero too. Funny enough they only occur after setting rebar state value. |
I suspect it is some device being mapped in the same error, but the error is intermittent. I workaround it by using a PS2 keyboard. |
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@Tokobotenkai Thank you! If I'm going flash bios with programmer CH341A so I'll need to uncapsule bios into ROM format, right? |
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@supermanz87 you have to use UEFIPatch. it's described in the README how to use it |
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Asus Z170-P D3 : requires patch "Don't downgrade 64-bit BARs to 32-bit (by @Mak3rde)" |
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@xCuri0 I found this:
Vit9696's code allows for nvramsmi to write on UEFI for Z97's Asus motherboards like my Maximus VII hero. Already tested it, and it works. Saved me from extracting nvramsmi from 1104 and replacing it on 3503. |
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Motherboard: Supermicro X11DPH-T ouankou@carina:~$ sudo lspci -v -s b1:00.0
b1:00.0 VGA compatible controller: Intel Corporation DG2 [Arc A770] (rev 08) (prog-if 00 [VGA controller])
Subsystem: Intel Corporation DG2 [Arc A770]
Flags: bus master, fast devsel, latency 0, IRQ 349, NUMA node 1, IOMMU group 11
Memory at ed000000 (64-bit, non-prefetchable) [size=16M]
Memory at 39b800000000 (64-bit, prefetchable) [size=16G]
Expansion ROM at ee000000 [disabled] [size=2M]
Capabilities: [40] Vendor Specific Information: Len=0c <?>
Capabilities: [70] Express Endpoint, MSI 00
Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable+ 64bit+
Capabilities: [d0] Power Management version 3
Capabilities: [100] Alternative Routing-ID Interpretation (ARI)
Capabilities: [420] Physical Resizable BAR
Capabilities: [400] Latency Tolerance Reporting
Kernel driver in use: i915
Kernel modules: xe, i915
Platform: Intel(R) OpenCL Graphics
Device: Intel(R) Arc(TM) A770 Graphics
Driver version : 24.39.31294 (Linux x64)
Compute units : 512
Clock frequency : 2400 MHz
Global memory bandwidth (GBPS)
float : 399.99
float2 : 405.33
float4 : 407.92
float8 : 413.15
float16 : 418.83
Single-precision compute (GFLOPS)
float : 13025.36
float2 : 11131.94
float4 : 10409.40
float8 : 10031.56
float16 : 9714.22
Half-precision compute (GFLOPS)
half : 19570.46
half2 : 19506.91
half4 : 19537.16
half8 : 19443.04
half16 : 19324.51
No double precision support! Skipped
Integer compute (GIOPS)
int : 5464.12
int2 : 5458.35
int4 : 5438.78
int8 : 5414.71
int16 : 5398.20
Integer compute Fast 24bit (GIOPS)
int : 5459.08
int2 : 5455.56
int4 : 5439.77
int8 : 5411.69
int16 : 5385.23
Transfer bandwidth (GBPS)
enqueueWriteBuffer : 9.20
enqueueReadBuffer : 8.29
enqueueWriteBuffer non-blocking : 9.72
enqueueReadBuffer non-blocking : 8.72
enqueueMapBuffer(for read) : 9.24
memcpy from mapped ptr : 5.55
enqueueUnmap(after write) : 8.66
memcpy to mapped ptr : 5.56
Kernel launch latency : 8.66 us
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Motherboard: ASUS P8Z77-V LE
Now they are both the same size and aligned.
Summary: Using |
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Motherboard: Asus PRIME B250M-A with Kaby Lake CPU |
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Motherboard: Dell Precision T7810 (E5-26xx v3/v4, C612) 
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Motherboard: MSI Z97 PC Mate (7850) Needed MMTool for module insertion otherwise will result in bios corruption during flash (very scary). Also needed procedure to enable "Above 4G Decode" because is hidden. Bios version 4.11 (4B - Last). UEFIPatch didn't create pad corruption. During flashing procedure screen bacame black with -no sign of life- but after a couple of minutes system reboot safety. I set 8GB bar |
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Motherboard: AsRock H110M-DGS R3.0 |
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Motherboard: ASUS P8Z68-V LX |
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Motherboard: ASUS H61M-A/BR |
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Motherboard: MSI Z270 SLI Notes: Followed the guide here without any issues. After flashing the modified BIOS, I made 3 changes:
As you can see in the 2nd screenshot, GPU-Z seems to think CSM is not disabled, but I think everything is working correctly
UPDATE Thanks to this reddit post, I was able to change "CSM disabled" in GPU-Z to "Yes" Windows 8/10 WHQL support needs to be Enabled. I didn't touch anything else, although Fast Boot was also enabled during the process, which is fine by me at the moment. For now, I'm just happy GPU-Z has updated:
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Motherboard: Gigabyte GA-A320M-DS2 Works fine with the lasted bios (F53d), but requires downgrading to F31 bios prior to flashing to avoid the "Invalid BIOS file" error in Q-flash.
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Asus X99-A ReBar works but doesn't really work with the Intel Arc B580. I have a 5930k CPU with 64GB of quad channel DDR4 2133mhz running at 3200mhz with XMP. Problem: Is there a hardware limitation to setting ReBar outside of the powers of 2? I'm already working on adding a custom 12GB option to the RebarState code. UPDATE: I just looked at the code and it seems like there is indeed a limitation for ReBarState size to the powers of 2. |
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Does someone know anything about MSI Z97-G43 ? |
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@xfstef The PCIe specification only allows BAR sizes that are power of 2. If you have a modern motherboard you will see it uses 16GB on 12GB GPUs like B580. The stuttering is caused by something else (maybe some PCIe setting in BIOS?) because 16GB BAR is correct. Some people have complained about issues with B580 on less powerful CPUs (official BIOS older CPUs like R5 2600) but I think your 5930k should be powerful enough to not stutter Try reducing MMIOH Base in BIOS setup, sometimes it causes issues like this. |
@xCuri0 where can I find the MMION setting in my BIOS? In my case it's a Z270 with an i7-7700K I have a B580 and noticed some stuttering as well, but it was greatly reduced after adding ReBar support. I assume it's a game / driver issue at this point, but am not sure Thanks! |
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@AnthonyWatson no it's only for HEDT like X79 / X99 / X299 |
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@xCuri0 It was an audio and / or LAN driver issue. After installing both, my 3D games are running smooth, no stutters or other issues. Motherboard: Asus X99-A |
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Hey there anyone try this on a haswell based Alienware 18 Viking? I got an mxm rx 6600xt on the way and would like to get rebar working to allow the GPU to stretch it's iegs |
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Motherboard: Asus Z170-K Notes:
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Motherboard: ASUS KRPA-U16 |
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Hello everyone! Please help me patch the BIOS dell xps 8700! It doesn't show up for me 4G decoding! |
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Motherboard: Supermicro X10SDV-4C-TLN2F 
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System: SYS-1028U/SYS-6028U I also had an Nvidia (PNY Quadro P4000, Pascal, incompatible despite having UEFI) in the system but that prevented the Intel from getting a rebar until I removed it ("Cannot read PCI Config Space"). Edit: Works with unlimited (
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MB: Asus P8Z77-M |
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Motherboard: ASRock Z97 Extreme4
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I was able to enable ReBar upto level 10 (1024MB) on a Gigabyte GA-H97-D3H (rev. 1.0) with an RX 580 2048sp and an i5-4440.
I was able to flash my modded BIOS with qFlash just fine. Here's the file for anyone who wants to flash it based on the latest version available on their website (F7) I couldn't find Above 4G Decoding but I found this
It states that it is enabled by default so I didn't touch modgrub (should I?) however Above 4G Decoding didn't work. I also couldn't find TOLUD on my BIOS Settings but I didn't search the blob for it. Until someone helps me to figure out how to turn on Above 4G Decoding anything above 10 results in a screen that says that no bootable drives were found and USB devices don't work. |
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Motherboard: Supermicro X9SCM-F lspci:
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Can you help me extract Dell rcv/exe? UEFITool cannot open them |
I7-7700 How do i flash this ? |
and others
Motherboards which don't support at least 2GB BAR size are considered not working.
If you're having any issues please see Common issues (and fixes) before replying.
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