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Upgraded my memory to 8gigs and now it is slower? - Page 2

post #11 of 24
They are all the same types of memory?
post #12 of 24
Quote:
Originally Posted by phildog549 View Post
When I look at CPU-Z it says the memory is in dual channel and running at 400mhz.
Double that because DDR2 does 2 things per cycle or whatever.
post #13 of 24
Quote:
Originally Posted by phildog549 View Post
When I look at CPU-Z it says the memory is in dual channel and running at 400mhz.
well that sounds right maybe one stick is bad or something
    
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post #14 of 24
See, my RAM is running at 850mhz (BIOS confirms that), but CPU-Z picks it up at 425mhz.
post #15 of 24
Thread Starter 
Quote:
Originally Posted by microman View Post
well that sounds right maybe one stick is bad or something
Should I just pull sticks until the performance gets better?
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post #16 of 24
Thread Starter 
Quote:
Originally Posted by alex98uk View Post
They are all the same types of memory?
All the same type of memory.
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post #17 of 24
Have you tried flashing to the latest BIOS in case it's an issue with the software controlling the chipset or something

You can also check whether its dual channel in the memory tab of CPU-Z. Next to where it says "channels #"
post #18 of 24
Thread Starter 
Quote:
Originally Posted by alex98uk View Post
Have you tried flashing to the latest BIOS in case it's an issue with the software controlling the chipset or something

You can also check whether its dual channel in the memory tab of CPU-Z. Next to where it says "channels #"
Let me try that... brb
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post #19 of 24
Quote:
Originally Posted by phildog549 View Post
I run Matlab a lot and when I had 4 gigs my code took 11 secs and now that I have 8 gigs it takes 21 secs! Windows Vista also downgraded my memory performance.
Wow. Did you try running Memtest to see if one or more module is bad/faulty?

I run Matlab a lot for my research--nothing too intensive, just for data work-up, but I do know that sometimes Matlab doesn't run as fast on a computer with a lot of RAM because it doesn't know how to efficiently access it--like if a calc only needs, say, 512MB to complete, having 8GB complicates the calc because Matlab doesn't efficiently manage memory. Just something I've noticed, but I don't know if it can cause a ~100% increase in calc time...
    
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post #20 of 24
Thread Starter 
Interesting result.... When I am in Ubuntu I get the same performance that I had with the 4 gigs so it seems to be how Vista 64 bit handles 8 gigs of memory. Maybe there is a patch out there?
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Q9550 E0 @ 3.93 1.35 vcore EVGA 780i SLI (A1) EVGA GTX 260 Core 216 Gskill PC8000 
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My System
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CPUMotherboardGraphicsRAM
Q9550 E0 @ 3.93 1.35 vcore EVGA 780i SLI (A1) EVGA GTX 260 Core 216 Gskill PC8000 
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WD Vista 64bit-Linux 64bit Rolling on dubs 1000 W Antec 
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