netkas.org forum
September 22, 2017, 05:32:03 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News: Information for registering users http://forum.netkas.org/index.php/topic,2246.0.html
 
   Home   Help Search Login Register  
Pages: 1 ... 8 9 [10]
 91 
 on: July 31, 2017, 11:52:01 AM 
Started by netkas - Last post by h9826790
I had this card, the only difference is that they rename the card to R9 280. But exactly the same thing anyway. This is a very nice card. One of the best 7950. Super quiet, very good cooling, especially good for cMP because using the blower design, and dual 6pin. In fact, for stock clock speed, you can easily downvolt it to 0.956V or even lower. But generally 0.956V is better than lower. Because that's the high demand 2D voltage. If set anything lower than that. Afterburner (in Windows) will unable to adjust the card's voltage. However, in Mac OS, my test shows the card can run stabily as low as 0.888V. Which make the card draw much less power, and stay cool.

I live in Japan, a bit north of Osaka. Everyone knows Akihabara but not so many know "Den Den Town" in Osaka.

I made the trip down to Den Den town today in sweltering heat & humiidy and found probably the only HD 7950 available.

It was a HIS HD 7950 in mint condition  Got it for ¥8,800 before sales tax 8%.

This HIS has a single fan and  2 X 6 pin power ( Great !  ) it appears so far to be reference but I think the PCB has a quite different layout to the AMD fererence release - I'll confirm this later.

Booted into Win 7  / 32bit on a dedicated HDD ( don't like Bootcamp ) with the HIS in slot one on my cMP 4,1 flashed to 5,1  with an EFI flashed XFX 5770 in slot 4.

Looked at bios's in both 1 & 2 bios switch positions and knew that they are identical. Decided that position 2's  bios would be flashed.

OOTB the folllowing showed video ( after bootup ) in Mavericks 10.9.5

1.  DVI -DVI

2.  HDMI - HDMI

3.  mDP - adaptor - DVI.

That bios switch is a wonderful thing to have on a GPU if one is not often booting from other HDD installations.

========================================

Flashed the HIS and get efI boot on . . . .  

1.  DVI - DVI

2.  mDP - adaptor - DVI

With two monitors connected the efi boot happened on the mDP - adaptor - DVI connection. That surprised me.

The HIS fans really rev up until just after booting to Mavericks but then basically . .inaudible . .nice !

===============================================

This is the 6th. Radeon card that I have flashed. I've come a long way with so much good advice and encouragement from many people here. You all know who you are. Please accept my heartfelt gratitude for making me more self sufficient and just a little more confident &  proficient.

Mike.

PS : Does anyone else have this particular HIS 7950 ? If so . . is there an R17 resistor ? ( I'm too tired to look at the moment ).


 92 
 on: July 31, 2017, 10:46:01 AM 
Started by netkas - Last post by SMIKX
After a great deal of Googling ... I plucked up the courage and successful did the R17 resistor hack to my
recently acquired HIS HD 7950.

I definitely learned a lot from this exercise and I will post a detailed guide for this card ONLY either tonight or tomorrow.

It is not hard but it is painstaking.  " Measure three times  .. cut once " an adage that will serve you well.

The R17 resistor on my HIS 7950 is looks exactly like a speck of dust.

The most positive thing I learned is that there are two decidedly different AMD PCB R17 resistor layouts - I almost removed the wrong resistor.

More on that in my next post. Over time I'll try to find exactly what the real benefits of doing this mod are 5.0 GT/s.
After all. . if Apple ships with 5.0 GT/s they must have a good reason.

 93 
 on: July 31, 2017, 05:41:37 AM 
Started by Rominator - Last post by nekton1
According to Mork vom Ork, the reason why the RX460 is no longer working in 10.13 is because:

"There seems to be a new checkroutine within AMD9500Controller: it checks for the Part# of the installed AMD card.
If it finds this value for Part#: 113-4E3531U or 113-4E353BU , then it sets "Radeon RX 580" as modelname and chooses "Orinoco" (which will match perfectly for RX480!) instead of "AMD,RadeonFramebuffer" as its related framebuffer.
 
That's because Apple's eGPU kit contains Sapphire AMD RX 580 PULSE as their bundled cards."

I've looked in the AMD9500Controller but have yet to spot where this check is coded.  Anyone have a pointer?

 94 
 on: July 30, 2017, 05:54:03 PM 
Started by netkas - Last post by SMIKX
I live in Japan, a bit north of Osaka. Everyone knows Akihabara but not so many know "Den Den Town" in Osaka.

I made the trip down to Den Den town today in sweltering heat & humiidy and found probably the only HD 7950 available.

It was a HIS HD 7950 in mint condition  Got it for ¥8,800 before sales tax 8%.

This HIS has a single fan and  2 X 6 pin power ( Great !  ) it appears so far to be reference but I think the PCB has a quite different layout to the AMD fererence release - I'll confirm this later.

Booted into Win 7  / 32bit on a dedicated HDD ( don't like Bootcamp ) with the HIS in slot one on my cMP 4,1 flashed to 5,1  with an EFI flashed XFX 5770 in slot 4.

Looked at bios's in both 1 & 2 bios switch positions and knew that they are identical. Decided that position 2's  bios would be flashed.

OOTB the folllowing showed video ( after bootup ) in Mavericks 10.9.5

1.  DVI -DVI

2.  HDMI - HDMI

3.  mDP - adaptor - DVI.

That bios switch is a wonderful thing to have on a GPU if one is not often booting from other HDD installations.

========================================

Flashed the HIS and get efI boot on . . . .  

1.  DVI - DVI

2.  mDP - adaptor - DVI

With two monitors connected the efi boot happened on the mDP - adaptor - DVI connection. That surprised me.

The HIS fans really rev up until just after booting to Mavericks but then basically . .inaudible . .nice !

===============================================

This is the 6th. Radeon card that I have flashed. I've come a long way with so much good advice and encouragement from many people here. You all know who you are. Please accept my heartfelt gratitude for making me more self sufficient and just a little more confident &  proficient.

Mike.

PS : Does anyone else have this particular HIS 7950 ? If so . . is there an R17 resistor ? ( I'm too tired to look at the moment ).

 95 
 on: July 29, 2017, 05:06:53 PM 
Started by Fl0r!an - Last post by vinnie1978
Macnoto ,  test the file i added below

On page 19 #post 272, spacedust mentions 2 efi versions with the ports that it supports.
The Futomaki seems to have the best result.

 96 
 on: July 29, 2017, 10:17:20 AM 
Started by Fl0r!an - Last post by macnoto
I have Asus R9 Direct CU II 280x 3GB, but when I tried to flash only upper DVI works. other ports are not working.
Can somebody help to properly map the ports?

Highly appreciated

 97 
 on: July 28, 2017, 06:26:32 AM 
Started by SMIKX - Last post by h9826790
You may test it in another way around. Put the card in slot 3 and see how it goes. That will make your card can only run at PCIe 1.1 x4. A measurable performance penalty is expected, but may not be that much.

IMO, unless the performance is really 300-400% difference. Otherwise, that means PCIe 1.1 x16 is already enough for the job. And further increase bandwidth won't give you any linear performance improvement.

In fact, I suspect those "huge improvement" exist because they are VRAM limiting. If all VRAM used up. The system now need to keep writing new data into the VRAM, which means more bandwidth helps. And double the bandwidth may really allow the job to finish in half time. If that's the bottleneck, FPS will be significantly improved.

It's not that hard to test this theory. Make 2 performance test in X-plane 10. One simple scene that require less than 1GB VRAM. And another one clearly can use up all VRAM. Run both in the x16 slot. And then run both in the X4 slot. Then compare their performance penalties.

If the theory is correct, the VRAM limiting test performance drop should be much higher than the non VRAM limiting one.

 98 
 on: July 28, 2017, 01:40:54 AM 
Started by SMIKX - Last post by SMIKX
Nice to meet another X-Plane fan.

I read this post after reading your reply to my prior post.

I am still curious to see for myself how X-Plane framerates are affected my the PCI 2.0 mod .. in any case it will be a good learning experience. My R9 270X only cost ¥6,500.

My next card will be either an R9 280X or a Sapphire HD 7950 - they're still both quite expensive here in Japan.

I came across this 4Gb Sapphire model but the seller has written " 7970" in the description which would be wrong http://www.ebay.com/itm/AMD-Apple-Radeon-R9-270X-4GB-Graphics-Video-Card-Mac-Pro-3-1-5-1-OS-10-13-7970/253055296761?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D41451%26meid%3D3eca0e8c68924a8d8cd9fac870de2b23%26pid%3D100011%26rk%3D5%26rkt%3D12%26sd%3D321610931161

Still pricey. I'll wait a bit more.



 99 
 on: July 28, 2017, 01:22:16 AM 
Started by SMIKX - Last post by SMIKX
h9826790

Thanks for your reply ( it's been quiet around here lately ).

I use X-Plane 10 a lot - I made & maintain the scenery for Sydney's "Kingsford-Smith " airport. A few people in the x-plane.org forums have mentioned that their FPS framerates went up dramatically after doing the 5GT/s mod which I put down to the way X-Plane handles CPU/GPU.

Ive seen your posts regarding the PCI 2.0 mod and for everyday GPU use & largely I agree with you.
getting EFI Bootscreens initself is a nice thrill but I'm curious to discover whether there are occasions in which the PCI 2.0 mod actually pays off.

A question for you - you seem knowledgeable on the R17 subject . . .

Why is "R17" printed ( along with other resistors & caps ) in white on my R9 270 X PCB . .though for the life of me .. I can not find the actual resistor - checked both sides of the PCB with the fan & heat disisipator removed ?


 100 
 on: July 27, 2017, 03:35:31 PM 
Started by SMIKX - Last post by h9826790
I personally suggest you forget about it.

1) we can do it on 7950 or 280X because there is a "reference", the Sapphire HD7950 Mac Edition card. However, for 270X, there is no reference. Even though here is a R17, doesn't mean that remove it can go PCIe 2.0.

2) The performance gain is effectively zero on my R9 280 (unless you install the card in a X4 slot, than the performance penalty may be up to 5% in benchmarks).

So, if you install the card in slot 1. There is absolutely no point to remove the resistor (even you can find it). If you install the card in slot 3 or 4, the protential risk still much much higher than the protential return. Not worth to do so.

If you want to do it for fun. Congratulations, AFAIK, you are the pioneer in this area, please let us know your result.

Pages: 1 ... 8 9 [10]
Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
SMFAds for Free Forums
Valid XHTML 1.0! Valid CSS!