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Old 09-23-2008, 12:48 AM   #1 (permalink)
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Default Memory clock problem

I know, only second thread and I got another question. I got the answer I needed in the other thread, so hopefully this one will be helpful, aswell.

I have the K9A2 Platinum motherboard, and I got 8GB (4gb (2x2) kits) DDR2 800Mhz.

(Other stats:

AMD Phenom 9850 BE @2.9Ghz
Visiontek HD4870 512mb DDR5
CoolerMaster RealPower 550WA
Samsung 750GB 7200RPM 32MB Cache SATA 3.0GB/s HDD
CoolerMaster CM690 Case w/ All fans taken w/ Blue LED and Medium speed
Optical Drive, and other stuffs unperformance wise.)

Only problem is, my memory (A-Data ADQVE1B16K DDR2 800 4gb Kits x2) Newegg.com - A-DATA 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Desktop Memory For clarification; it's running at 400Mhz, and when I set the voltage down to 1.8v like required, it runs at 450Mhz after a reboot, but even when I tweak the BIOS to run at 1.2:66, it'll still only run at 400Mhz Unganged mode or Ganged mode. If I set it any higher than 1.2:66 (Maybe it was 1.2 that worked? Which ever) it just doesn't boot, and gives me a Memory-based Blue-screen-o-horrifying-slash-n-bash-death.

So, my question of the month: How do we get it running at 800Mhz like it's supposed to be? :laughing:
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Old 09-23-2008, 10:57 AM   #2 (permalink)
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Default Re: Memory clock problem

DDR2 means Dual Data Rate which means that your effective speed (800MHz) is twice your actual speed (400MHz). So it's already running at 800MHz
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Old 09-23-2008, 01:54 PM   #3 (permalink)
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Default Re: Memory clock problem

So when my ATI Overdrive system says "Memory Frequency: 400.** Mhz", running in dual-channel mode, it is really running at 800? If so, you're da man. And should it run in Ganged or Unganged mode?
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Old 09-23-2008, 01:58 PM   #4 (permalink)
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Default Re: Memory clock problem

Ganged = dual channel mode for ram. All cores get access to 100% of the ram.

Unganged = single channel. Each core gets access to a stick of ram.

The unganged mode is better as each core will get access to data quicker. Better for multi-tasking, in theory.
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Old 09-23-2008, 02:07 PM   #5 (permalink)
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Default Re: Memory clock problem

Okay, that helps. Thanks! It was in Unganged Forced mode, so when I saw "800Mhz" on the Bios, and "Single 400Mhz" in ATI Overdrive, I figrued it was only half speed. Thanks for your help.
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Old 09-23-2008, 02:58 PM   #6 (permalink)
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Default Re: Memory clock problem

No problem, glad to help
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