Messages

1

Overclocking / How to over clock an evega 78000 gt geforce pci/ e

« on: May 09, 2006, 10:12:57 AM »

http://downloads.guru3d.com/download.php?det=815

this is a registry flag that enables driver level overclocking on nvidia's cards. you'd access it from the standard display>advanced menu.

2

Overclocking / overclock vid card

« on: May 09, 2006, 10:09:06 AM »

http://www.techpowerup.com/atitool/

here's a guide to overclocking the x1900xt

note- with a different gpu, your voltages woud differ. If you have a different gpu, dont use the voltages they do.

3

Overclocking / whats overclocking?

« on: May 09, 2006, 10:00:00 AM »

you can overclock from software, using tools like clockgen, riva tuner(videocards) etc. or from the bios

If you have an hp, then while it's possible to find a clockgen that works, your board isn't going to be designed the way an enthusiast board is designed - you'd lack voltage increments, fsb increments, the power phase to the chip wont be as overdone as say, a DFI or ABIT board.

As for decreasing the life - it depends on the manner of the overclock (as J0etann outlined), and the processor.

e.g. The athlon xp-m. These were desktop bartons retested at lower voltages to see if they'd work. You could take one of these and jsut increase the fsb from 266MHz to 400MHz, drop the multiplier to 2/3 it's value, and set the voltage to that of the desktop counterpart, and it would run almost guaranteed. You wont be decreasing the lifetime compared to the other desktop chips because it was designed to handle that voltage, only tested to run with less. after that keep in creasing the multiplier, and you'd get anywhere from 2.3 to 2.7GHz on the old athlon-xp core. Not bad at all for back then

e.g.2 The 2.4C northwood. If a company has as easy time making chips, they wont sell all at just high speed. They'd lose out on either low end if it's too costly, or high end if it's too cheap. So intel for a while underclocked their chips. 2.4C northwood pentium 4s would easily run at 3.0 to 3.2 GHz without any voltage increase. Keep in mind, these chips are TESTED and set; they're designed to run at these speeds. But either one test failed, or they had a glut of high speed chips and had to make up bottom.

e.g.3 The pentium-m/celeron-m on desktop. Intels hottest chip - surprised? There's a difference between power and temperature. The prescott runs at about 60-70C tops (safely) but produces up to 130W. Old pentium-m's were designed to run even at 100C, but produced only 30W. Why was it hotter? It was designed to handle being in a crappy environment - a laptop. Not much cooling. Oh the pentium 4 on your lap can cause burns - because the heat energy given off is sooo much, but the "hot" pentium-m on your lap barely made you sweat. When desktop boards were available, overclockers put desktop heatsinks on these, letting them safely pump voltages through it and overclock them without worry on shortened lifespans.

e.g.4 This is BAD

The newcastle 130nm line doesn't like to be overclocked. The voltage isnt correct but i was still pushing 1.6+ which is scary. Only did that once, but if i had run this chip for a long time, then that would have burnt up easy http://images.thetechguide.com/forum/public/style_emoticons/<#EMO_DIR#>/smile.gif\' class=\'bbc_emoticon\' alt=\'\' />

4

Overclocking / OCing Sempron 64 2800+ on AsRock K8NF4G-SATA2

« on: May 09, 2006, 09:37:08 AM »

Lower the hypertransport multiplier. I peaked at 2.35GHz using the same board and chip.

downgrading the bios would help get you the voltage manipulation asrock disabled. If you want to do that, you'd need to fall back to version 1.2 http://www.asrock.com/support/download.asp...el=K8NF4G-SATA2

use that as a last resort, as you should always try to run the latest bios.

5

Overclocking / Overclocking a AMD Sempron 64 2800+

« on: May 08, 2006, 11:38:34 AM »

[quote name=\'ohm\' post=\'82878\' date=\'Jan 18 2006, 08:54 AM\']If you want to overclok then you should use corsair ram not kingston because corsair garantee their memory even you overclok it[/quote]
no ddr400 would guarantee an overclock. I usually recommend ddr500, because while it may not give the best latencies, you at least can overclock to 500 (25% fsb boost) keeping within the memory spec.

I used a similar system for a pc i built for my GF last christmas. I overclocked the chip from 1.6GHz to 2.35 on an asrock 6100 based mobo, and that board doesnt even let me adjust voltages. I clocked it down to 2.2GHz, and it's been running smoothly, in a rather hot climate, though while here, it never even broke 40C overclocked on the stock sink.

your chip has a multiplier of 8; your ram runs off the bus in a 1:1 ratio normally.
The base bus is 200MHz, giving your 2800+, a speed of 200*8=1600MHz, and ram a 200*2(for ddr) 400MHz. The HTT multiplier is x4, giving a hypertransport bus speed of 200x4=800MHz


step 1
define a stability test.
download prime95 http://www.mersenne.org/freesoft.htm
run the torture test for 10 mins to check your cpu each overclock. When running have a temp sensor up so you can make sure you're not going to kill your chip.


step 2
Increase the base bus speed by 15 MHz. This is available through the bios.
that would make the chip run at 1720MHz, and memory at 430MHz (asrocks bios applies a ratio to the memory on trying to overclock it. I was only able to see the true speed running cpu-z).
If you fail on the torture test, freeze or blue screen, then try these one at a time
a. drop the memory speed to 333/266/200, or apply a ratio that does that. 333 really means a 5/6 ratio, multiplied by the memory speed - so if 430 is unstable, a 5/6 ratio means you'd be running 358 MHz.
b. drop the HTT multiplier to x3 (HT bus is very sensitive)
c. increase voltage to cpu (vcore) by the next point

keep a note of your temps. If it seems high, back down.

6

Hardware / Computer

« on: May 07, 2006, 12:45:01 AM »

http://en.wikibooks.org/wiki/How_To_Build_A_Computer

havent looked through it all.


Edit : you have all the parts? What parts you have is the most important part of this - it has to work together. If you've got the parts, then it pretty much is like well, one of those toys (cept rather delicate http://images.thetechguide.com/forum/public/style_emoticons/<#EMO_DIR#>/wink.gif\' class=\'bbc_emoticon\' alt=\'\' /> ) with different shaped blocks and holes.

7

Hardware / dell shuts down

« on: May 07, 2006, 12:39:34 AM »

You can try using speedfan
http://www.almico.com/sfdownload.php

it should find the temp probes on your motherboard. It may not know which one is your cpu - but if you run something cpu intensive such as super-pi or prime, you'd know which one as you'd see the cpu temp jump.

prime95 url - http://www.mersenne.org/freesoft.htm

If you can run say prime 95 for 5 minutes (note the graphs in speed fan to see what temps you're getting!) then it's probably not your cpu temp causing the crash.


another possibility is memory. you can use prime95 to check your memory using the memory torture test. You can also use http://www.memtest86.com/

when it shuts down, note the exact time and check your event viewer.

start->run->"eventvwr"

look for warnings or errors especially under application and system.