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How to make Link speed 2.5GT/s to 5.0GT/s on ATI card and Nvidia card

T

theitsage

Suspended
Aug 28, 2005
795
862
Spacedust said:
What about HD5770 or HD5870 cards ? There is still no answer here :(
Click to expand...

I did it on the 5770. You need to add a resistor to R3 (right by the CrossFire connectors). I retrieved a resistor from my old 7300 GT card and it worked great.

15522713636_3c313f35a8_b.jpg
 
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R

richgoga

macrumors regular
Oct 11, 2013
150
61
I've got a flashed HD7950 running at 2.5GT/s in a Mac Pro 2006.

Is there any point to me doing this mod, considering the old Mac pro only has PCIE 1.0?
 
S

Spacedust

macrumors 6502a
May 24, 2009
999
160
On some HD5770 cards this R3 is located on the other side of the card hidden under memory heatsink, but which resistor is that exactly ?

10922378_1427950310828857_3087398134881711517_o.jpg
 
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S

Spacedust

macrumors 6502a
May 24, 2009
999
160
Any idea which one should be added/removed on HD 7870 XT ?

Removing R17, then adding one to R13 and R5 does not help:

h_1393157502_1183202_259b78d2c9.jpg
 
Z

zondas

macrumors newbie
Dec 2, 2014
29
2
5GT/s on MSI HD5870

I have a MSI HD5870.I have flashed it with MAC EFI.It works 100% but i`d like to mod the Link Speed to 5GT/s.I can`t find the Resistor R3 or r17.Can someone help me please
 
pierrox

pierrox

macrumors 6502
Jun 19, 2015
271
81
Paris, France
I removed R17 on my MSI R9 280X Gamer 3Gb and I'm still at 2.5 on MacPro 5,1.
I wonder what I did wrong. Do I have to really destroy the contact between its too points? Why do people use a graphite pen since it's conductive?
 
h9826790

h9826790

macrumors P6
Apr 3, 2014
16,614
8,544
Hong Kong
do you mind to upload a picture of the R17 location of your card?

The resistor may be there but without any ident.

Anyway, is your card a reference one?
 
HAL2010

HAL2010

macrumors member
Nov 3, 2014
85
21
The Netherlands
Not a reference one I think. I will upload 2 pictures. The first one is a stitched picture to keep the resolution as large as possible. Just click on them and you will see a larger version. Here are the pictures:



 
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h9826790

h9826790

macrumors P6
Apr 3, 2014
16,614
8,544
Hong Kong
By comparing your card to my R9 280, it looks like this one is the R17.
Screen Shot 2015-08-30 at 23.03.55.jpg

Screen Shot 2015-08-30 at 23.01.51.jpg

As you can see, the RP1, C112, and C132 are all at the same relative location.
 
YZFNYC

YZFNYC

macrumors newbie
Oct 5, 2015
19
8
Palm Bay Florida
Well I'm new on here but have been reading a lot on flashing and upgrades and general Mac info that is been awesome. So recently I upgraded from my Mac Pro 1,1 to 3,1 and got a used PC card on Ebay. But it looks like it's an RND model. Only 768 Unified Shaders and the Bios Version I can't find anywhere. Even the R17 that is supposed to be very obvious isn't seem to be were it is. Anyway just want to get any info anyone may have on this Reference Card.

Video%20Card.gif


WP_20151009_004.jpg



WP_20151009_001.jpg
 
M

MacVidCards

Suspended
Nov 17, 2008
6,096
1,056
Hollywood, CA
I can see it right where it is supposed to be.

"Monica" is an early 7950. I actually got one with an early pre-production Mac EFI on it. Toss it in and try booting, it may have a Mac EFI on it already, though doubtful. Try both switch positions.Those early 7950s frequently have an 8 pin plug, but will work with just 2 @ 6 pins.

Shows how old those Tahiti chips are, it has a sticker with "ATI" on it.

I've been giving help to a guy named Matt something in another thread here, same applies to flashing this one.

Piece of cake.
 
M

MacVidCards

Suspended
Nov 17, 2008
6,096
1,056
Hollywood, CA
pierrox said:
But if you're on a Mac Pro 3,1 there's no point removing r17 as it can only deal with 2.5 pci
Click to expand...

El Wrongo !

In fact, it has PCIE 2.0

Better luck next time.

And as I discovered at Netkas having a look at his roms, the guy got super lucky, it is a pre-production Mac 7950 with an earlier version of Mac 7950 EFI. (or a moron messed it up)

I bought a "monica" card once and it had early Mac EFI, now he has too.

goMac once accused me of getting secret pre-production cards from Nvidia. The fact is, observant people will find these Mac development cards all the time. Frequently sold from people in Nor Cal, but also other places.
 
YZFNYC

YZFNYC

macrumors newbie
Oct 5, 2015
19
8
Palm Bay Florida
MacVidCards said:
El Wrongo !

In fact, it has PCIE 2.0

Better luck next time.

And as I discovered at Netkas having a look at his roms, the guy got super lucky, it is a pre-production Mac 7950 with an earlier version of Mac 7950 EFI. (or a moron messed it up)

I bought a "monica" card once and it had early Mac EFI, now he has too.

goMac once accused me of getting secret pre-production cards from Nvidia. The fact is, observant people will find these Mac development cards all the time. Frequently sold from people in Nor Cal, but also other places.
Click to expand...

Wow! Once again the one of the top dawgs has replied, I'm humbled... MacVidCards himself. Thanks for replying, I had no problem flashing it. The EFI that was on the original did not show boot screen so it might have been someone tried to mod it before? Maybe? Either way It was no problem flashing it. Only issue I got with the card is the # of Shaders is only 768 and shouldn't it be 1792 or something in that ball park? As for the R17 I think I know which one it is but since it is slightly different then the ones I have seen in the past I didn't want to pop it off without verifying.

R17.jpg


Should be highlighted one I'm pretty sure. BTW, I did get it from someone in NorCal
 
Y

Yamcha

macrumors 68000
Mar 6, 2008
1,825
158
I cannot seem to find the R17 Resistor on my 7950 Powercolor PCS+, not sure maybe it's not labeled in my case?
 
boodaddyz

boodaddyz

macrumors member
Dec 25, 2008
63
2
In my case I am able to find R17 on my card, but there is no resistor on that spot. I have the Gigabyte R9 280x (Rev2) I have no clue what to do if R17 is blank. My camera is coming in the post tomorrow so I will post back images. Any help or advice would be much appreciated.
 
Revoxy

Revoxy

macrumors newbie
Apr 13, 2016
24
11
Mabe someone can help me out. After i have succsesfully overclocked my Pro 3.1 i'd like to change the PCIE Speed of my Gigabyte Windforce Card.

I also desoldered R17 but GPUz shows no difference in Linkspeed.
Looks like my card is using the standard pcb but has a different configuration:

2016-05-25 10.23.38.jpg

As you can see i resoldered R17 already.
Can someone measure the other resistor values for me, so i can configure this card exactly like the standard configuration?

Greetings, Stefan
 
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