Overclocking GeForce 256: temperatures?
After I overclocked my Celeron (from 900 MHz to 1.1 GHz), I started searching for a utility to overclock my GeForce 256 videocard. I found a little smart program, that must work with most nVidia cards - RivaTuner 2.0:
Here are some results using 3DMark2001:
Celeron 1,1 GHz/122 FSB, 256 RAM@122 MHz, 4:4:1, 1.825 V
nVidia GeForce 256 32MB
D3D Hardware T&L
Texture Format: Compressed
FSAA mode: none
Feb. 15, 2002:
(Windows XP, original Windows XP drivers)
[core: 108 MHz/RAM: 143 MHz]: 3DMark Score: 1707
[core: 120 MHz/RAM: 155 Mhz]: 3DMark Score: 1864
[core: 125 MHz/RAM: 165 MHz]: 3DMark Score: 1977
[core: 140 MHz/RAM: 180 MHz]: 3DMark Score: 2175
As it may be seen, increasing the core/RAM speed leads to a better performance. But when I touch the chip when set to 140/180, I think it's very hot, not as hot as when at 108/143. If anybody knows, what are the safe overcloking options for nVidia 256 cards? May I damage the chip if overclocked from 120/166 (default) to 140/180. And any cooling ideas? I think the original fan on the nVidia card is not very good... it's even sleeve bearing, not ball!
PS The strange default setting 108/143 is, of course, due to the 122 MHz FSB setting, at 4:4:1, as when set to these values, the PCI bus probably works at 30.5 MHz and the AGP at only 61 MHz; and the default settings of 256 cards are 120 MHz/166 MHz AT 33PCI/ 66 AGP bus. Am I right?
You could add a different 60mm cooling fan on the GPU. Also, a sleeve bearing fan that fits in a PCI slot will give better cooling. The memory clock settings (the 2nd #) will realize the most performance gains, but will also cause instability if pushed too high. My Asus V 7700 has a probe. OC'd to 220/438 DDR from 200/400, it runs @ or less than 120 F.
Last edited by missiveusa; 02-16-2002 at 12:49 PM.
I made various tests since then. Installed the nVidia Detonator 23.11 drivers; performance increased a bit. Here are some results:
Feb. 16, 2002:
(WinXP, nVidia 23.11 Detonator drivers)
[108/143]: 3DMark Score: 1903
[120/155]: 3DMark Score: 2074
[120/166]: 3DMark score: 2163
[125/165]: 3DMark Score: 2198
[140/180]: 3DMark Score: 2394
[150/205]: 3DMark Score: ==2613==
On 150 MHz core/205 MHz RAM I got the max results, with no system problems. When tried 165/215 and started 3DMark, the first frames of the test 1 were corrupt, so I immediately stopped all. I think something around 150/200 is the maximum, but now I run on 120/166 (default), for more safety, because I still have not a decent cooling.
May the GPU or the memory chips frye, when pushed up to 125% of their nominal values (for my card that means from 120/166 to 150/205)?
If anybody has any experience with the already a bit old nVidia 256, please, post a reply. Thanks!
Meanwhile, I appreciate very much the Riva Tuner 2.0. It's a very good program! And it helps me to get around this: my FSB frequency is 122@4:4:1, which means AGP at only 61 MHz, which means 108/143 MHz values on my card, instead of 120/166 (default ones for that model). Now I can set the values I want, no matter what's the FSB rate!!
Last edited by lefou; 02-16-2002 at 06:10 PM.
New Security Features Planned for Firefox 4
Another Laptop Theft Exposes 21K Patients' Data
Oracle Hits to Road to Pitch Data Center Plans
Microsoft Preps Array of Windows Patches
Microsoft Nears IE9 Beta With Final Preview
Simplified Analytics Improve CRM, BI Tools
Android Passes RIM as Top Mobile OS in 2Q
VMware Updates Hyperic System Management
File Monitoring Key to Enterprise Security
LinkedIn Snaps Up SaaS Player mSpoke