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WoW, thank you very much for sharing your config. By any chance you can attach the kext you've used? not sure where to get them all.I have a similar config with yours.Thank you!

I had your card and was very slow.Jumping to amd was a huge boost in perfomance.

FALSE . From 3,1 to 4,1 it's a huge boost in rendering time.

I guess Vapor-x it's more suitable than dual-x.

Yes, will work.Haven't tried Sierra yet.

we have same card.You have 2 dvi ports i guess.Download a rom from a reference card and put it in ROM folder name it 1002_679a.rom (make sure you have the extension). Inject ati and load vbios checked and there you go.You have it mine.

I found a much easier fix.Just download the rom from a r9 280 from sapphire and rename it 1002_679a.rom put it in ROM folder on efi partition an check load vbios in clover.Done! Make sure you put the extention .rom at the end.Done.Now should work perfect.

Hi, had the same problem with a Sapphire 7950 dual-x boost. Your card, as mine, is a non-refernce card with 2 DVI's. Download https://www.techpowerup.com/gpudb/ the BIOS of your card but with reference card layout. Check in clover Load VBIOS and inject ATI, then place the BIOS you downloaded in...

Hi, i have a sapphire 7950 with boost so basic it's the same card as yours.Do you have 2 dvi ports?Have you tried clover?I can't even boot with it in safe mode.I think i'm gonna try chimera and multibeast.Thank you!

Update: i can boot to desktop but no acceleration on 10.10.5 my main os with fake id 67B0 from GCN 1.1 but with no acceleration and 7mb vram. I can boot to desktop only if i delete AMD7000Controller and AMDRadeonx4000 from S/L/E or fake id 67B0 from GCN 1.1 but with no acceleration and 7mb...

yes, i've tried all combinations of framebuffers and settings.

(Fixed) Sapphire HD 7950 Dual-X Boost Hi everyone! I have this gpu http://www.amazon.com/dp/B00BBKO65S/?tag=tonymacx86com-20 I'm using a z77-d3sh with i7 3770 and work perfect with 650 ti boost with clover os 10.10.5 I followed Radeon Compatibility Guide - ATI/AMD Graphics Cards and ATI/AMD...

Hi , have you found a solution?I have the same card from sapphire and have the same problem.Thank you!

Hi , glad you found a solution.What clover settings you used?You've injected Ati? add fake id? I have a 7950 and i'm in the same boat as you.I've replaced the 7000controller like you said and rebuild caches.What smbios?Thank you!

Have someone find a fix?:(

I've tried.Dual bios is for overclocking , one is stock at 925 and other unlocked.Yes, i'm using InjectAti=False .:| i have attached my config up. Maybe in bios i'm missing something. Sata mode - AHCI internal graphics - Disabled init display first -...

I always disable the igpu:-( If my layout doesn't match the reference card, should boot but have no display right? Also my card has a button for dual bios. Does it matter if it's on or off? Thank you for your fast response.

Hi Florian , I have a Sapphire 7950 dual x , and I see you have a Sapphire 280 Vapor X which I find very similar as layout design and model. I am using 10.10.5 with latest Clover on a Z77-D3SH v1.1 and i7 3770. I can boot without problem with my 650 Ti boost and igpu, but every time I put my...

Yes, but no luck.I quess it's from 10.10.5 since i find that 10.10.3 + have problems. I will test on a fresh install both el cap 10.11.3 and 10.10.1 last know version that worked with this card oob. Update: I've installed fresh 10.10 and now i can't even boot , i think the reason it booted...

And with this config 3mb but my second monitor is mirroring.If i inject Ati here i got same results but with the name of the card but still 1024 x 768 and no acceleration Display: Type: GPU Bus: PCIe PCIe Lane Width: x16 VRAM (Total): 3 MB Vendor: ATI (0x1002) Device...