Overclocking memory

[Li'l ol' me]

I've got some PC3200 Twinmos (winbond chips) running on an abit nf7-s with
an XP2100. It's 2x256mb btw, so I'm using dual-channel mode as you'd
expect.

I'm currently running at 212x9 no problems. But when I try anything over
215fsb (430 for the DDR) I get memory errors in Memtest (the DOS one).

Now the mobo can go to 300fsb, and the CPU is well under the 2000mhz I've
had it do at lower FSB settings eg. 166x12, so I'm assuming it's the memory
itself.

What can I expect DDR400 to overclock to? I guess there's no answer to
that, but I'm usuing pretty decent stuff, and I'm disappointed I can't even
get close to a 10% increase. Would sticking some passive heatsinks on help?

tia

 

[MiniDisc_2k2]

I've got some PC3200 Twinmos (winbond chips) running on an abit nf7-s with
an XP2100. It's 2x256mb btw, so I'm using dual-channel mode as you'd
expect.

I'm currently running at 212x9 no problems. But when I try anything over
215fsb (430 for the DDR) I get memory errors in Memtest (the DOS one).

Now the mobo can go to 300fsb, and the CPU is well under the 2000mhz I've
had it do at lower FSB settings eg. 166x12, so I'm assuming it's the memory
itself.

What can I expect DDR400 to overclock to? I guess there's no answer to
that, but I'm usuing pretty decent stuff, and I'm disappointed I can't even
get close to a 10% increase. Would sticking some passive heatsinks on help?

tia

My DDR400 only successfully overclocks to DDR410 (but then again, that's
only the highest setting I can use, the next step up is 436, and it won't go
that high.

Just because the mobo can go up to 300fsb doesn't mean that you'll ever go
up that high. Mine can go up to 366 but I've never gotten it that high (for
obvious reasons). My FSB will only go up to 166MHz (which puts my DDR at
410). Can't you just take the divider down a notch? Using Dual-Channel
technology and an overclock at 410, you can get a transfer rate of 820!
That's enough for me. Usually, the dual-channel technology is faster than
the CPU FSB so there's really no reason to overclock the RAM.

Heatsinks generally never help, I've never seen any need for them. Then
again, I've never seen any memory overclock well. I've got high-quality
memory and it's still not overclocking well...

For future reference, this post belings in alt.comp.hardware.overclocking

 

[Li'l ol' me]

My DDR400 only successfully overclocks to DDR410 (but then again, that's
only the highest setting I can use, the next step up is 436, and it won't go
that high.

Just because the mobo can go up to 300fsb doesn't mean that you'll ever go
up that high.

No intention of doing so! Just stating that the FSB is well under max spec.

Mine can go up to 366 but I've never gotten it that high (for
obvious reasons). My FSB will only go up to 166MHz (which puts my DDR at
410). Can't you just take the divider down a notch?

I see you're running asynchronous, although I can't quite work out what
ratio (auto or 6:6 would give 333, and 5:6 would give 400). How 410? Sure
you're not doing 170fsb or thereabouts?

Using Dual-Channel
technology and an overclock at 410, you can get a transfer rate of 820!
That's enough for me. Usually, the dual-channel technology is faster than
the CPU FSB so there's really no reason to overclock the RAM.

Heatsinks generally never help, I've never seen any need for them. Then
again, I've never seen any memory overclock well. I've got high-quality
memory and it's still not overclocking well...

I have to stick heatsinks on my Radeon 8500 just to stop it overheating at
stock speed!