REsults with new Geil pc4200 RAM and my foray into overclocking

[Slappy00]

Geil 2x 512MB 3.5ns pc4200RAM


On a abit IS7 (just got it with the quiet fan and GIGA-LAN from 3com ) and p4 2.4c

Results:

250 (500DDR) 1:1 @ 2.5-8-4-4 2.7v(Im not too keen on the timeings, I know 2.5 is good but the others escape me)

266 (533DDR) 1:1 @ 3-8-4-4 2.7v(mfg reccomend settings SPD seems to think otherwise: 2.5-8-4-4): post but hangs on memory/IDE dectection.

I cant seem to get my CPU any higher than that 3.0 barrier, granted I have stock Intel Cooling :/ and havent added any juce to the CPU (default voltage)

also setting the Game Accelerator on anything other than "AUTO" causes problems...

I might clock it higher on a 5:4 but will that not decrease performance from a 1:1

Anyways the memory works good but cant seem to get the 533FSB I want at 1:1. I can take up to 2.9v but the abit board only does 2.8 max so im kinda stuck till Abit decides to get more juce through there.

Edit: heh seems like even GeiL dont have the specs for this ram up yet but N.Egg just pumped the price up another $30.

 

[bjc112]

Bump that core voltage, you will shoot right over 3ghz..



DDR 533

You will be pushing a 1ghz FSB...

 

[tazdevl]

I went with the Geil PC4000 Ultra Plat for $300 shipped. I'm sure if I loosen up the timing to the same as the 4200 and crank the voltage, it'll clock as high as the 4200.

You're running into the 250MHZ FSB bug which is on both IS7 and IC7 boards. Supposedly Abit has a BIOS fix in the works, but who knows.

As to the vcore, as long as you keep it under 1.7v you will be safe.

I'd ditch that stock HSF or at least use a decent thermal compound with it if you're using the pad that came with the HS.

The timings are fine... CAS of 2.5 is better than 3. Others don't have as big of an impact on performance. The faster the RAM, the looser the timings. Basically all the memory manufacturers are using DDR333 and DDR 400 chips... binning and modifying them to run @ higher than their rated speed. Geil's stuff isn't true 3.5ns chips.

1:1 is the way to go if the RAM and CPU will take it. Run some benches in sandra to see the difference in RAM performance between 1:1 and a high FSB with 5:4.

Have to say that I'm pleasantly surprised with Geil so far.

Hopefully a higher vdimm will be included in the next BIOS fix from Abit. The new motherboard, the Max3, has a max vdimm of 3.1v. It's using the same components as the IC7 and I assume the IS7, so there's no reason why they couldn't bump things up for us.