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Going for DDR2 900

post #1 of 5
Thread Starter 
Ok so this is the first time I have overclocked with a higher RAM speed as my goal. Right now I am limited by being too broke to buy another fan, so I am not going for much.

Here's my system at baseline:
CPU (AMD Athlon x2 4400+ Brisbane)
200 * 11.5 = 2.31 GHz
RAM (2 * 1Gb Corsair DDR2 800)
5-5-5-18

What I did:
CPU
225 * 10 = 2.25 GHz
RAM (Now DDR2 900)
See below

At first, I did not need to change my RAM timings for this OC. It booted successfully, passed a five hour Orthos Blend test. Bioshock was beautiful

Next day, no POST at all. Bad words were said. Changed Ram timings to 6-6-6-18 and it works. Later that day, no POST.

Any ideas as to why from anyone?
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X4 920 Gigabyte GA-MA770-S3 Geforce 9800 GT 2x 1GB DDR2 1066 
Hard DriveOptical DriveOSMonitor
320 Gb SATA 2 Seagate 7200 Memorex DVD+-RAM 525 Windows XP SP3 17'' Widescreen 
PowerCase
550 Watt Antec ChiefMax Hero 24 Gaming Case with LED 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X4 920 Gigabyte GA-MA770-S3 Geforce 9800 GT 2x 1GB DDR2 1066 
Hard DriveOptical DriveOSMonitor
320 Gb SATA 2 Seagate 7200 Memorex DVD+-RAM 525 Windows XP SP3 17'' Widescreen 
PowerCase
550 Watt Antec ChiefMax Hero 24 Gaming Case with LED 
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post #2 of 5
that's not an overclock >_>

and your RAM is NOT even close to 900mhz unless you messed around with the divider, which I don't think is even possible on your old mobo.

Your RAM can be somewhere around 680~700mhz if you didn't mess around with the divider.

what voltage are you using?

do 4-4-4-16 timings @ 2.1v with your cpu at 2.3ghz and if you're gonna do what you call "overclock" make sure that your results end up in a higher frequency than the stock -_-
Edited by Proxors - 6/14/08 at 1:23pm
Pwnsaucer
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Pwnsaucer
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post #3 of 5
Thread Starter 
Ok, there is no option in my BIOS for the RAM divider, but from what I understand, a CPU multiplier of x11 automatically has a divider of 6 and x10 has a divider of five. CPUID confirmed that the divider did drop to five and therefore I had a RAM speed of 450 MHz, DDR2 900

Also, there is no Vcore or VDIMM in my BIOS. Those bastards.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X4 920 Gigabyte GA-MA770-S3 Geforce 9800 GT 2x 1GB DDR2 1066 
Hard DriveOptical DriveOSMonitor
320 Gb SATA 2 Seagate 7200 Memorex DVD+-RAM 525 Windows XP SP3 17'' Widescreen 
PowerCase
550 Watt Antec ChiefMax Hero 24 Gaming Case with LED 
  hide details  
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X4 920 Gigabyte GA-MA770-S3 Geforce 9800 GT 2x 1GB DDR2 1066 
Hard DriveOptical DriveOSMonitor
320 Gb SATA 2 Seagate 7200 Memorex DVD+-RAM 525 Windows XP SP3 17'' Widescreen 
PowerCase
550 Watt Antec ChiefMax Hero 24 Gaming Case with LED 
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post #4 of 5
You cant really overclock if it doesnt post at such a small oc. On stock voltages, i got my bus to 240 and ram to 920 so i would lighten up on the oc.
Mill
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AMD FX-6100 Gigabyte 970A-UD3 Sapphire 7850HD OC G.skill 4GBx2 1600MHz 
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HAF 912 
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Mill
(9 items)
 
  
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AMD FX-6100 Gigabyte 970A-UD3 Sapphire 7850HD OC G.skill 4GBx2 1600MHz 
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Case
HAF 912 
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post #5 of 5
If you are just aiming to find the RAM maximum, keep the timings at stock--only increase if needed(will end up adding more performancein the end); higher timings make overclocking the RAM nearly pointless because bandwidth efficiency drops as soon as you raise the timings--and continuously up your fsb (i do it by increments of 5), until your computer cant post or pass either memtest, orthos, prime, or w/e stress test you use for at least 3minutes. Just overclocking your RAM up to some speed without testing it fully is pretty fruitless. Overclocking is meant to take time; dont rush it. Theres a guide somewhere on the site thats extremely helpful if you're new to overclocking as well.
Edited by Kvatch - 6/15/08 at 12:08am
Jimbo
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Jimbo
(13 items)
 
  
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AMD Phenom 9850 BE DFI LP DK 790GX M2RS BFG 8800GT 512MB 6GB DDR2 800 
Hard DriveOptical DriveOSMonitor
500GB Seagate HP DVD Writer and Sony DVD Drive Vista HP x64 1440x900 19" display 
KeyboardPowerCaseMouse
Saitek Gaming Keyboard Antec 850W Thermaltake v9 Sidewinder 
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