GA-P55-USB3 above 3.2 GHz (i7 860) results in half speed???

[rhalls]

An interesting issue on my two GA-P55-USB3 Machines: When I try to overclock above 3.2 GHz, it displays the correct speed, but the result is a very slow machine (about half the speed, tested with cinebench and other rendering tools). Up to 3.19 GHz all works fine. Then theres a break where he OS runs slower.
Core I7 860, OSX 10.6.2, Multibeast installations, DSDT.

What could that be? System temperature is well, I have a very nice cooler on my CPU (35 Degrees C with 3.19 GHz in normal operation, about 50 degrees when all cores are highly used).

 

[rhalls]

I had the same problem. My proc was stuck at 45 % in msr tools and I had half the score in geekbench that I had on a core 2 duo!

I did multiple re-install but I think that by updating to the latest chameleon (rc5) I solved the issue. Now running at 3.4 ghz.

Thanks for the reply, interesting point, I will try that and hope it helps! I didnt work with chameleon RC5 as for now, cause I use the MultiBeast Installers. But I will try with a fresh install.

 

[rhalls]

It took some time until I today had the time to test it out. And: Yes! Thanks! Chameleon RC5 did the job! I reached 4 GHz with 40 degrees idle and about 75 degrees with full power. Thats really great for 3d rendering things!

 

[rdurty2]

I wonder if I'm having this same problem. My i5-750 oc'ed to 4.0 gives me a score of only 4500 in geekbench.

I guess I should look into updating chameleon.

What the easiest way to either reinstall rc5 (if I already have it) or upgrade to rc5?

 

[rdurty2]

Well according to msr tools my cpu is running at 45%. I upgraded to chameleon rc5 and it's still only running at 45%. This sucks!!!!

I want my 4.0ghz in os x, not a measly 1.8

 

[diamond]

EERrrm posted this on the wrong thread. I have Safari, Chrome and Dev Chrome running and too many wondows!

Hello,

I had this problem! Fiddled with my CPU multiplier and got worse scores than stock settings!

I solved it reading this forum. Go into your BIOS and change all the CPU settings from Auto to Enabled (except the ones you don't want Enabled, set those to... Disabled).

My Hackintosh's Geekbench scores doubled and are now faster than my Windows 7 scores!

If it helps my scores are around 1100 with 32bit Geekbench. I've overlocked my 2.93GHz to 3.42Ghz, but for seom reason Turbo instantly boosts it to ~3.7Ghz and with all for cores I get ~3.8Ghz and with on 4.2Ghz. Weird! My ram is a bit over 2000Mhz!

 

[Murk1]

Hi, same problem, same board. When I use the software that came with the mobo to overclock, even just mid way, not maxed, baddd benchmark scores and very noticeable lag. I go back to stock, score are doubled or more
here is stock..
overclock stats below..
Thank you for your thoughts Diamond, but telling noobs to enable all the things you want, and disable the things you don't, well, If I knew that I guess I wouldn't be here scratching my head... specify please..

Integer Processor integer performance 3168 Overall Score-- 4056
Floating Point Processor floating point performance 5464
Memory Memory performance 3644
Stream Memory bandwidth performance 3069
System Information
Operating System Mac OS X 10.6.5 (Build 10H574)
Model Hackintosh Motherboard Apple Computer, Inc. Mac-F42C88C8 x.x
Processor Intel Core i5 760
Processor ID GenuineIntel Family 6 Model 30 Stepping 5
Processor Frequency 2.80 GHz Processors 1
Cores 4 Threads 4
L1 Instruction Cache 32.0 KB L1 Data Cache 32.0 KB
L2 Cache 256 KB L3 Cache 8.00 MB
Memory 4.00 GB 1332 MHz DDR3 FSB 532 MHz
BIOS Apple Computer, Inc. MultiBeast.tonymacx86.com
Integer Performance
Integer 3168
Blowfish
single-threaded scalar 1868
82.1 MB/sec

Blowfish
multi-threaded scalar 4464
182.9 MB/sec

Text Compress
single-threaded scalar 2246
7.18 MB/sec

Text Compress
multi-threaded scalar 2131
6.99 MB/sec

Text Decompress
single-threaded scalar 2498
10.3 MB/sec

Text Decompress
multi-threaded scalar 2486
9.91 MB/sec

Image Compress
single-threaded scalar 2500
20.7 Mpixels/sec

Image Compress
multi-threaded scalar 2552
21.5 Mpixels/sec

Image Decompress
single-threaded scalar 2628
44.1 Mpixels/sec

Image Decompress
multi-threaded scalar 5818
94.9 Mpixels/sec

Lua
single-threaded scalar 4363
1.68 Mnodes/sec

Lua
multi-threaded scalar 4470
1.72 Mnodes/sec

Floating Point Performance
Floating Point 5464
Mandelbrot
single-threaded scalar 2467
1.64 Gflops

Mandelbrot
multi-threaded scalar 2630
1.72 Gflops

Dot Product
single-threaded scalar 4039
1.95 Gflops

Dot Product
multi-threaded scalar 4459
2.03 Gflops

Dot Product
single-threaded vector 4824
5.78 Gflops

Dot Product
multi-threaded vector 5811
6.04 Gflops

LU Decomposition
single-threaded scalar 1331
1.18 Gflops

LU Decomposition
multi-threaded scalar 1416
1.24 Gflops

Primality Test
single-threaded scalar 6382
953.3 Mflops

Primality Test
multi-threaded scalar 5321
987.5 Mflops

Sharpen Image
single-threaded scalar 6218
14.5 Mpixels/sec

Sharpen Image
multi-threaded scalar 6444
14.8 Mpixels/sec

Blur Image
single-threaded scalar 7663
6.06 Mpixels/sec

Blur Image
multi-threaded scalar 17501
13.8 Mpixels/sec

Memory Performance
Memory 3644
Read Sequential
single-threaded scalar 4726
5.79 GB/sec

Write Sequential
single-threaded scalar 5513
3.77 GB/sec

Stdlib Allocate
single-threaded scalar 3711
13.8 Mallocs/sec

Stdlib Write
single-threaded scalar 1817
3.76 GB/sec

Stdlib Copy
single-threaded scalar 2456
2.53 GB/sec

Stream Performance
Stream 3069
Stream Copy
single-threaded scalar 3116
4.26 GB/sec

Stream Copy
single-threaded vector 3476
4.51 GB/sec

Stream Scale
single-threaded scalar 3155
4.09 GB/sec

Stream Scale
single-threaded vector 3191
4.31 GB/sec

Stream Add
single-threaded scalar 2790
4.21 GB/sec

Stream Add
single-threaded vector 3401
4.73 GB/sec

Stream Triad
single-threaded scalar 2996
4.14 GB/sec

Stream Triad
single-threaded vector 2434
4.56 GB/sec
========================================================

mildly overclocked to 3.15ghz

Integer Processor integer performance 1278 Overall Score-- 1978
Floating Point Processor floating point performance 2101
Memory Memory performance 2572
Stream Memory bandwidth performance 2819
System Information

Operating System Mac OS X 10.6.5 (Build 10H574)
Model Hackintosh Motherboard Apple Computer, Inc. Mac-F42C88C8 x.x
Processor Intel(R) Core(TM) i5 CPU 760 @ 2.80GHz
Processor ID GenuineIntel Family 6 Model 30 Stepping 5
Processors 1 Threads 4
Cores 4 Memory 4.00 GB 1500 MHz DDR3
Processor Frequency 3.15 GHz Bus Frequency 600 MHz
L1 Instruction Cache 32.0 KB L1 Data Cache 32.0 KB
L2 Cache 256 KB L3 Cache 8.00 MB
BIOS Apple Computer, Inc. MultiBeast.tonymacx86.com
Integer Section

Section Score 1278

Blowfish
single-threaded scalar 861
37.8 MB/sec

Blowfish
multi-threaded scalar 757
31.0 MB/sec

Text Compress
single-threaded scalar 1037
3.32 MB/sec

Text Compress
multi-threaded scalar 2185
7.17 MB/sec

Text Decompress
single-threaded scalar 1153
4.74 MB/sec

Text Decompress
multi-threaded scalar 950
3.79 MB/sec

Image Compress
single-threaded scalar 1150
9.50 Mpixels/sec

Image Compress
multi-threaded scalar 1071
9.02 Mpixels/sec

Image Decompress
single-threaded scalar 1212
20.4 Mpixels/sec

Image Decompress
multi-threaded scalar 1100
17.9 Mpixels/sec

Lua
single-threaded scalar 2011
774.4 Knodes/sec

Lua
multi-threaded scalar 1852
712.7 Knodes/sec

Floating Point Section

Section Score 2101

Mandelbrot
single-threaded scalar 1136
756.2 Mflops

Mandelbrot
multi-threaded scalar 1105
723.4 Mflops

Dot Product
single-threaded scalar 1851
894.7 Mflops

Dot Product
multi-threaded scalar 1873
853.7 Mflops

Dot Product
single-threaded vector 2221
2.66 Gflops

Dot Product
multi-threaded vector 2439
2.54 Gflops

LU Decomposition
single-threaded scalar 615
547.8 Mflops

LU Decomposition
multi-threaded scalar 590
517.7 Mflops

Primality Test
single-threaded scalar 2959
441.9 Mflops

Primality Test
multi-threaded scalar 2220
412.2 Mflops

Sharpen Image
single-threaded scalar 2862
6.68 Mpixels/sec

Sharpen Image
multi-threaded scalar 2682
6.18 Mpixels/sec

Blur Image
single-threaded scalar 3528
2.79 Mpixels/sec

Blur Image
multi-threaded scalar 3339
2.63 Mpixels/sec

Memory Section

Section Score 2572

Read Sequential
single-threaded scalar 2540
3.11 GB/sec

Write Sequential
single-threaded scalar 3637
2.49 GB/sec

Stdlib Allocate
single-threaded scalar 1696
6.33 Mallocs/sec

Stdlib Write
single-threaded scalar 2105
4.36 GB/sec

Stdlib Copy
single-threaded scalar 2882
2.97 GB/sec

Stream Section

Section Score 2819

Stream Copy
single-threaded scalar 2236
3.06 GB/sec

Stream Copy
single-threaded vector 3784
4.91 GB/sec

Stream Scale
single-threaded scalar 2349
3.05 GB/sec

Stream Scale
single-threaded vector 3246
4.38 GB/sec

Stream Add
single-threaded scalar 2527
3.81 GB/sec

Stream Add
single-threaded vector 3466
4.82 GB/sec

Stream Triad
single-threaded scalar 2370
3.28 GB/sec

Stream Triad
single-threaded vector 2578
4.83 GB/sec

 

[Lnx2Mac]

Thank you for your thoughts Diamond, but telling noobs to enable all the things you want, and disable the things you don't, well, If I knew that I guess I wouldn't be here scratching my head... specify please..

Check out my blog for Optimal BIOS settings.

 

[rhalls]

I must recall my post thazt simply upgrading to chameleon RC5 solves the issue - it once did, but i cant rede the thing. It doesnt work on my other machine and it doesnt work on the machine it once worked, bacause i thought i could upgrade to the newest rc5 release - and now i dont know with which version of chameleon it worked.... Sad..

 

[rhalls]

I didnt manage to redo the installation that worked and now i cant do that because i am in the middle of a project and dont want to risk a broken installation, but it may be the case that Chameleon-2.0-RC5-r593-Standard.pkg was the reason that it once worked. I found out that i used that version. In a week or two i will try that.