M4800 Owner's Thread

Managed to edit the BIOS and overclock the GPU further.

Previously I was running 705MHz (default) OC'd to 840MHz

Now it's 840MHz (default) OC'd to 980MHz with turbo boost to 993MHz, temp is decent, 62c is the max I've seen so far after 3 runs of Heaven benchmark and few hours of Diablo 3 and WoW.

Memory is overclocked to 1900MHz, not much point in going higher than this.

Happy with the performance I'm getting now, maybe I won't need to upgrade the GPU for a while.

 

What kind of FPS did you gain from overclocking GPU?
Memory overclock from 1600 to 1900 is noticeable?

 

With Heaven benchmark (1920x1080, 8AA, Extreme Tessellation, DX11, Ultra quality, this seems to be the standard settings for benchmarking) I went from 7 fps to 10 fps.

With WoW at high settings, FPS stays around 60 (vsync'd), it doesn't dip to 50s as much as before, similar with Diablo 3.

Haven't tried other games yet but I expect to see similar gains.

Overclocking the memory from 1400 (default) to 1900 helps, but beyond that I don't see much difference.

 

Took my K1100M from 705/1500 to 900/1900 so far, and thermals and stability are still excellent.

My particular pet peeve application is War Thunder. I went from ~40fps at my old settings to >70, and I've now upped my quality options two full grades using the in-game presets. I've gone from sub-GTX 460 performance to roughly GTX 560 Ti levels, using desktop cards as a quick example.

The core seems to have lots of headroom, probably because it's the top grade of the top bin of that particular silicon, so the best of the best are in the GK107GL bins. The memory as well seems to be way, way underclocked. The markings on the chips on my K1100M show it to be rated to 2GHz, so it's only running 75% of nominal by default. Probably again just economies of scale and top bins, plus Quadros being run at less than 100% speed to increase certainty of no errors. Since my work isn't as sensitive to errors as it is to speed, I'm willing to take the trade and potentially void my warranty.

 

Seems like I've hit the limit with my K1100M, if I go beyond 1Ghz on the core, I get artifacts or crashes, but at 993MHz it's completely stable, but that's probably down to the voltage, I haven't tweaked it, and I don't intend to for now.

 

I wouldn't touch the voltage. It's likely to cause problems and can push the card beyond what the slot can handle.

I'm totally OK with risking my K1100M, I was planning on buying a K2100M from eBay before I started. Replacing my M4800 is a less happy prospect.

Personally I'd back down to 950 or even 900 in your situation, you want to have a safety margin to allow for things like blocked vents or waking up while in a bag. The more margin you have, the longer before things melt or catch fire, or just let the smoke out.

 

Yeah, I've clocked it a bit down to 980MHz, 993 wasn't as stable as I thought, gonna see how that goes.

It spends 99% its time on a dock so I'm not worried about it waking up in a bag, yet.

Also, any way to control or disable the keyboard light timeout?

 

There's a bios setting for that.


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I checked and couldn't find it, only the option to control the brightness, which isn't what I want, I'd like to able to keep it on until I turn it off, etc.

 

I can check mine in a half hour or so, but I remember there being a timeout setting (I.e. 1/2/5/10 s/always on).


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