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Nvidia GeForce GT 420m OCing - Page 2

post #11 of 15
Quote:
Originally Posted by Cakewalk_S;12739294 
I'm not sure if it was a game problem but Crysis locked up on me yesterday at 800MHz core. I was still able to get into task manager and end the program, I didn't go above 74C either. So I'm not quite sure if it was a GPU problem. I just backed it off to 740-760MHz.

I ran the OCCT test for a full 15 minutes as I was told. 15 minutes of actual test, not set, so it was a 20minute custom test.

I'm still trying to find the best setting for gaming...Haven't found it yet. But the 420m is quite a good GPU for OCing. Having the cooling pad blow air into the heatsink really helps keep temps down. I notice a good 10C difference on Idle when my cooling pad fans are on. The only modification I could really do to increase cooling is theres a black mesh between the grills under the laptop. Basically its like a dust protector, well since they're round holes, it cuts off probably quite a bit of air flow. But, not sure I want to totally disassemble my laptop to remove some plastic mesh...
When you have those lockups, pop open GPU-Z and have a look at your GPU clock. It should be in the default graphics card tab right above default clock. If your GPU clock is back to default that means that the lockup was caused by a unstable overclock. If you don't have GPU-Z yet, a quick google search will get you this program pretty quickly.
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post #12 of 15
Thread Starter 
It was my optical drive. I'm still running crysis off the CD and I guess it locked up because it didn't start spinning again. Something like that. I had EVGA precision open and the clocks never changed.

I can run all the settings on high with about 27-40fps average but thats with 0xAA. Its kinda annoying that when I add AA the FPS just absolutely gets destroyed. 2-4xAA will drop it down to 20-30fps. And every once and awhile it'll get really laggy and chop down to like 6fps. Its annoying. Wish I could get better performance.

I'm wondering. Could downclocking increase my FPS? I know its quite contrary but I'm wondering if somehow my clocks are too high and its causing lag... Looking at all the specs. The 420m should be the exact same chip to a 550m. Its just clocked lower... This could be true because I'm getting such good results at 550m settings...?

I played Crysis for a good hour and a half or so unfortunately, and I hit 77C. I'm not quite happy with that temp. Although its not that high, I'd like it lower since i'm OCing it that much. Thing is on stock clocks, I'll still hit 73C so its not that much of a difference.
post #13 of 15
Quote:
Originally Posted by Cakewalk_S View Post
It was my optical drive. I'm still running crysis off the CD and I guess it locked up because it didn't start spinning again. Something like that. I had EVGA precision open and the clocks never changed.

I can run all the settings on high with about 27-40fps average but thats with 0xAA. Its kinda annoying that when I add AA the FPS just absolutely gets destroyed. 2-4xAA will drop it down to 20-30fps. And every once and awhile it'll get really laggy and chop down to like 6fps. Its annoying. Wish I could get better performance.

I'm wondering. Could downclocking increase my FPS? I know its quite contrary but I'm wondering if somehow my clocks are too high and its causing lag... Looking at all the specs. The 420m should be the exact same chip to a 550m. Its just clocked lower... This could be true because I'm getting such good results at 550m settings...?

I played Crysis for a good hour and a half or so unfortunately, and I hit 77C. I'm not quite happy with that temp. Although its not that high, I'd like it lower since i'm OCing it that much. Thing is on stock clocks, I'll still hit 73C so its not that much of a difference.
Usaully a overclocking software would not change when it gets downclocked, you must use GPU-Z to see it change. About the FPS drop issue, the card is just simply not powerful enough to handle too much physics.
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post #14 of 15
Thread Starter 
There is quite a difference with temps when overclocked. I overclocked to the 540m setting. 672/1344/900 Core/Shader/Memory. I only hit 70C with this setting. At 740-780MHz on the Core, shader is doubled automatically. I'll get anywhere from 74-77C. Still not quite concerned with temps but certainly showing different temps.
post #15 of 15
i just oc'ed a Packard Bell Easynote TM with the same gpu. This is what i got, after getting it up to unstable, then down to stable, then down abit more.

Core Clock: 700Mhz
Shader Clock: 1400Mhz
Memory Clock: 820Mhz

My max temprature was 81degrees, but it went back down to 80, and now shuffles between 80 and 79.

I used MSI Kombustor to test my gpu, link:
http://www.geeks3d.com/20110407/download-msi-kombustor-2-0-2/
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