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512mb stick of ddr400 ultra ram

post #1 of 6
Thread Starter 
i already have 2 256mb sticks of ddr 400 both running at 200 mhz. when i put in the stick of 512 and then when i over clock it to 2.55 it becomes unstable. i reset my bios and after i reset it and try to turn it on the monitor doesnt turn on. then when i take out the stick of 512 ram it starts perfectly fine. i am able to get to 2.50 overclock stabley. any ideas.
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post #2 of 6
The different RAM sticks likely have different default timings. It is always wise to have a matching set of RAM when overclocking. A mix like you have is likely to cause instability. I would look into selling the 2 x 256 MB and getting a second (identical!) stick of the 512 MB

Or just sell all and get a 2 x 1GB set like the G.Skill Extreme PC 4000
    
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post #3 of 6
Thread Starter 
Quote:
Originally Posted by Chozart
The different RAM sticks likely have different default timings. It is always wise to have a matching set of RAM when overclocking. A mix like you have is likely to cause instability. I would look into selling the 2 x 256 MB and getting a second (identical!) stick of the 512 MB

Or just sell all and get a 2 x 1GB set like the G.Skill Extreme PC 4000

to be honest i have another board which needs ram and a case and everything so ill just put them on there. i have to say even with a 3% oc they run perfectly fine but when i get anything higher then 2.50 it causes trouble. and if i do get any other ram for this rig im goign to get pc4400 since my mobo can handel it
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CPUMotherboardGraphicsRAM
core 2 quad q9550 asus p5n-d  GTX 550 TI 8gb corsair xms2 2x4gb pairs 
Hard DriveOptical DriveOSMonitor
500gb sata drive & 2tb sata2 drive cd/dvd + cd/dvd burner windows vista ultimate 64bit aces x193w 
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post #4 of 6
A mixed set can run stable ... if you're lucky. In your case it seems to handle mild overclocks, and just get instable when you push harder...

You should look for something like this then:
G.SKILL 1GB (2 x 512MB) 184-Pin DDR SDRAM Unbuffered DDR 550 (PC 4400) Dual Channel Kit System Memory - Retail
http://www.newegg.com/Product/Produc...82E16820231019
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
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N/A Corsair HX520 Coolermaster Cavalier N/A 
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CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
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post #5 of 6
Thread Starter 
so u recommend getting rid of the 2 256 sticks
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500gb sata drive & 2tb sata2 drive cd/dvd + cd/dvd burner windows vista ultimate 64bit aces x193w 
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Prebuilt rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
core 2 quad q9550 asus p5n-d  GTX 550 TI 8gb corsair xms2 2x4gb pairs 
Hard DriveOptical DriveOSMonitor
500gb sata drive & 2tb sata2 drive cd/dvd + cd/dvd burner windows vista ultimate 64bit aces x193w 
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microsoft keyboard 850 watts xigmatex modular psu cool master logitech optical 
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post #6 of 6
For now, if you don't plan to buy additional RAM, run the 2x256MB (at 512MB total). That way you can run it Dual Channel. With only the 512MB stick, you'll run single channel.

You could try both (either 2x256MB or 1x512MB), just for the fun of it to see which overclocks better

Are you planning to buy RAM, or wait until you have enough for the PC4400?
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
KeyboardPowerCaseMouse
N/A Corsair HX520 Coolermaster Cavalier N/A 
Mouse Pad
N/A 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
KeyboardPowerCaseMouse
N/A Corsair HX520 Coolermaster Cavalier N/A 
Mouse Pad
N/A 
  hide details  
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