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View Full Version : Lapping the G400 :)



DuRaNgO[MU]
27th February 2000, 08:30
Earlier this week I decided to remove my G400 to try some new cooling ideas with the chip and memory, when I popped the heatsink off the G400 (Tennmax Lasagna), I noticed the heatsink compound wasn't making contact in the middle of the chip!(I always use as little compound as possible)
So using a tooling guide, I checked out the heatsink and found it to be perfectly flat, so on to the g400...
What I found was that the G400 chip had slightly raised edges on all four sides!
With some 600 grit sandpaper, I carefully sanded off the edges (used a permanent marker on the edges as a guide) bringing the surface to a much flatter and smoother finish(I then repeated this on my memory chips as they have heatsinks on them as well)
I was only able to get 3 more mhz out of the core and memory, I feel confident that the chips are running much cooler now than they were before which should extend the lifespan of the card http://forums.murc.ws/ubb/smile.gif
(note the speeds I reached were 3 higher than in my sig but I run at the sig speeds as there's not a large difference in performance just cooler chips)
jim

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Abit BE6 with P3 500 @ 5*124=620
14.6 gb Maxtor ata66 and 128mb ram
G400 vanilla 32mb @ 168/210
Sblive with Altec Lansing speaker combo
384k DSL and Realtek nic
Windows 98se with DX7a
3dMark2000 = 2956
Worn out reset button :O)

Cyberdude
28th February 2000, 11:51
OoOOOOoohhhhHh
NNiiiiiiiiIIIIce!!!!!
To bad there isn't a boardmonitor on it!!

p.s. are you the same DuRaNgO[MU] but with [MU] Xtra??

DuRaNgO[MU]
28th February 2000, 14:04
yeah, my pasword was lost when I changed my e-mail and typed it in wrong http://forums.murc.ws/ubb/frown.gif lol

Scout255
29th February 2000, 19:32
e-mail ant, he will change it for u

DuRaNgO[MU]
1st March 2000, 16:34
did already http://forums.murc.ws/ubb/frown.gif
no word back yet

TweetyPi
20th May 2000, 10:27
What kinda performance increase did u see when u O/Ced your G400??? I'm thinking about O/Cing mine, just wondered if it was worht it?

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Cel366@468 -BE6 -128mb's PC133 -G400SH32mb -SBLive! Value w/ LW3.0 -Quantunm SE U66 7200rpm 9.1Gb -Pro120 200/100/10mbps ethernet.

impact
27th May 2000, 09:13
Hey, check this (http://gloom.iwarp.com/g400-test.zip) out, it is an .xls document that compares the fps on differently clocked G400 in Quake2 and Breakneck. BTW, it's also done on a Celeron 458. http://forums.murc.ws/ubb/smile.gif