GA-Z68X-UD3H-B3 SSD Slow Write, but fine Read Speed!

[Paul]

Okay, so i just bought another hackintosh. And i got this very popular board (GA-Z68X-UD3H-B3) along with the OCZ Vertex 3 60GB, and other amazing components.
Now this is a very popular problem out there with this specific board, the read speeds of the SSD are right, but the write speeds are totally off. I have looked online, and everyone has this problem, but nobody has the solution. This problem occurs with or without TRIM.

I was hoping that the tonymacx86 community will be able to resolve this issue, and to show a superiority to the other forums.

 

[Paul]

Anyone? It is really frustrating to buy an ssd and to have the write speed of an hdd. I think it has to do with this motherboard, everyone with this motherboard has this problem.

 

[Sizarro]

I have a Crucial CT256M4SSD2 256GB SSD and your same mobo except mine is a Rev 1.3.

I ran two tests:

Test 1. Copying approx 10gb from a 7200 Seagate mechanical drive to the Crucial SSD. The copy rate averaged about 105mb/second.

Test 2. Copying (not a move) of approx 10gb from one folder to another folder on the Crucial SSD. The copy rate averaged about 150mb/second.

If you find anything, please post.

By the way, I ran these tests using LinuxMint and have temporarily put the hackintosh aside since I can't seem to get past the gray Apple logo after running MultiBeast (top 1/3 of the gray Apple logo boot screen is black with colored streaks; as if a graphics issue). I'm assuming you were successful using the BIOS F10 version (I had thought that may be my cause).

 

[eMacPaul]

I have a different (still GA) board, and a Kingston SSD, and get qualitatively similar results:


System (i5 760, 8GB RAM, GA-P55M-UD2)
dd count=10000000 if=/dev/zero of=/dev/null
5120000000 bytes transferred in 11.667780 secs (438815261 bytes/sec)

Drive Write

SATA HDD (500 GB WDC WD5000AAKS-007AA0)
dd count=10000000 if=/dev/zero of=/Users/paul/Desktop/test.dat
5120000000 bytes transferred in 61.058970 secs (83853363 bytes/sec)

SATA SSD (64 GB KINGSTON SV200S364G)
dd count=10000000 if=/dev/zero of=/Volumes/Mac\ OS\ X/test.dat
5120000000 bytes transferred in 103.262088 secs (49582573 bytes/sec)

eSATA HDD (1 TB SAMSUNG HD103SI)
dd count=10000000 if=/dev/zero of=/Volumes/Storage/test.dat
5120000000 bytes transferred in 65.465671 secs (78208929 bytes/sec)

Drive Read

SATA HDD
dd if=/Users/paul/Desktop/test.dat of=/dev/null
5120000000 bytes transferred in 47.313883 secs (108213482 bytes/sec)

SATA SSD
dd if=/Volumes/Mac\ OS\ X/test.dat of=/dev/null
5120000000 bytes transferred in 24.176114 secs (211779279 bytes/sec)

[/b]eSATA HDD
dd if=/Volumes/Storage/test.dat of=/dev/null
5120000000 bytes transferred in 79.894148 secs (64084794 bytes/sec)

 

[smolderas]

I have GA-Z68X-UD5-B3 and ocz vertex 3 120gb on sata3. If you tell me how I can test it, I will report back.


So here are my results:

$ time dd if=/dev/zero of=blabla bs=1000000 count=1024
1024+0 records in
1024+0 records out
1024000000 bytes transferred in 2.051230 secs (499212679 bytes/sec)

real	0m2.056s
user	0m0.001s
sys	0m0.348s
$ time dd if=blabla of=/dev/null bs=1000000 count=1024
1024+0 records in
1024+0 records out
1024000000 bytes transferred in 0.100890 secs (10149675884 bytes/sec)

real	0m0.102s
user	0m0.001s
sys	0m0.101s

 

[aokman]

i am getting interesting results also... i am getting good read speeds in blackmagic but low writes compared to other results with other macs.

using a Z68X-UD3H with a 120gb Corsair Force GT

Results 520.93
System Info
Xbench Version 1.3
System Version 10.7.2 (11C74)
Physical RAM 16384 MB
Model MacPro3,1
Drive Type Corsair Force GT
Disk Test 520.93
Sequential 317.85
Uncached Write 426.51 261.87 MB/sec [4K blocks]
Uncached Write 309.38 175.05 MB/sec [256K blocks]
Uncached Read 178.01 52.10 MB/sec [4K blocks]
Uncached Read 719.40 361.56 MB/sec [256K blocks]
Random 1442.72
Uncached Write 2291.96 242.63 MB/sec [4K blocks]
Uncached Write 641.06 205.23 MB/sec [256K blocks]
Uncached Read 4106.92 29.10 MB/sec [4K blocks]
Uncached Read 1876.74 348.24 MB/sec [256K blocks]

 

[scousi]

i am getting interesting results also... i am getting good read speeds in blackmagic but low writes compared to other results with other macs.

using a Z68X-UD3H with a 120gb Corsair Force GT

Results 520.93
System Info
Xbench Version 1.3
System Version 10.7.2 (11C74)
Physical RAM 16384 MB
Model MacPro3,1
Drive Type Corsair Force GT
Disk Test 520.93
Sequential 317.85
Uncached Write 426.51 261.87 MB/sec [4K blocks]
Uncached Write 309.38 175.05 MB/sec [256K blocks]
Uncached Read 178.01 52.10 MB/sec [4K blocks]
Uncached Read 719.40 361.56 MB/sec [256K blocks]
Random 1442.72
Uncached Write 2291.96 242.63 MB/sec [4K blocks]
Uncached Write 641.06 205.23 MB/sec [256K blocks]
Uncached Read 4106.92 29.10 MB/sec [4K blocks]
Uncached Read 1876.74 348.24 MB/sec [256K blocks]

I have the same board with corsair Force 3 120 GB with good results.

 

[aokman]

that is very puzzling, we have sort of similar xbench results, well nearly since the force gt is rated slightly faster. However black magic is reporting very differently...

need to try something else i think

 

[SnellenJelle]

I have just finished a clean lion machine with the Vertex 3 120gb and when I test with blackmagic I also get low (160mb/s) writing speeds and high (490mb/s) reading speeds.

I have TRIM enabled and everything is working fine.

Anybody has a explanation or solution?

 

[_KF_]

i think it's a "Blackmagic/DISK SPEED TEST" problem... try AJA System Test and check again...

http://www.aja.com/products/software/