Mac Pro 4,1 GPU bottleneck

[CuamckuyKot]

I've 2009 Mac Pro with 2xNehalem 2.66GHz processors.

I've just tested GTX 660 (even EFI-flashed), GTX 970 and GTX 750Ti.

What I've found out – they work at nearly 2/3 of what they could be.

I've compared with PC results of Unigine Heaven and Valley test and get that it is so.

How can we get GTX-card works for the full power?

May be the trouble is in processor and upgrade 4,1->5,1 with 2x5650 Xeon will make the deal?

 

[h9826790]

May be the trouble is in processor and upgrade 4,1->5,1 with 2x5650 Xeon will make the deal?

You get your results from bootcamp?

 

[GameFreak348]

trust me, its mac os x. I ran cinebench with my gtx 770. It got worse fps then a HD 5770 on Mac. But on windows it crushed the 5700

 

[ilikewhey]

this doesnt sound good i just bought a 4.1 8 core lol i guess im keeping my gtx 970 in my pc just for that tad longer

 

[GameFreak348]

this doesnt sound good i just bought a 4.1 8 core lol i guess im keeping my gtx 970 in my pc just for that tad longer

You could get a GTX 680 Mac Edition or Radeon HD 7950 Mac Edition and there wont be a problem

 

[CuamckuyKot]

You get your results from bootcamp?

No, I'm using Yosemite.

 

[ThoreEliasson]

Would you mind posting your Luxmark and Unigine Scores for 750 and 970 under Yosemite in their standard settings?

Thank you!

 

[CuamckuyKot]

I've just made money back for 970. So I can only use 750Ti.

There they are:

LuxMark 2.1

Room – 448 Points
Sala – 803 Points
LuxBall HDR – 6243 Points

Unigine Heaven
Extreme 1600x900 8хАА – 558 Score 22.1 FPS

 

[ThoreEliasson]

Thank you!

Sala more or less equals my 750.

 

[N19h7m4r3]

No, I'm using Yosemite.

Then you can't compare it to Windows tests since Windows Unigine defaults to Direct X which is faster than OpenGL.

Install Bootcamp with the latest NVIDIA drivers when then run Unigine at the exact same settings as the PC/Windows results you found. Then you can compare.

 

[AngryRedTicTac]

I'd never bothered to run Unigine Heaven on my 7950 equipped PRO in OSX, so I just gave it a whirl using my 10.9 boot. I'll run it on Yosemite tomorrow for comparison.

Unigine Heaven
Extreme 1600x900 8хАА – 772 Score 30.7 FPS

I'm sadly still running a plain 4X2.66, hopefully finally going to grab an X5677 4x3.46 soon. Given up on scrounging up enough for a 6 core for now.

I've just made money back for 970. So I can only use 750Ti.

There they are:

LuxMark 2.1

Room – 448 Points
Sala – 803 Points
LuxBall HDR – 6243 Points

Unigine Heaven
Extreme 1600x900 8хАА – 558 Score 22.1 FPS

 

[Agent007pr]

OP, maybe this will shed some light on your choice. I posted @ https://forums.macrumors.com/showthread.php?p=20290965&posted=1#post20290965