High overclocking DDR3 VRAM

[smeezekitty]

Ok so here is the thing. I have a DDR3 Radeon 6670
It is very starved for memory bandwidth so I experimented with overclocking

I managed to push the VRAM from a stock of 667MHz to 800MHz (20%!)
with no crashes and I didn't see any artifacts.

The framerate was increased nearly proportionally even with the core at stock

But this thing has no VRAM heatsinks and after running the 3 minute Unigine Valley
the VRAM chips measured ~55c on the surface according to my infrared therm and they
were uncomfortable to touch.

So I guess the question is overclocking the memory that high safe?

 

[Danbuscus25]

well, what are the internal temps of it? as long as it is under 80c it is ok, but try to keep it under 70c. i, too, have the 6670, but its the gddr5 version. i overclocked it by 20%, both the core and vram, and under furmark stress test, it maxed out at about 65c i think. i dont run it that way though, as i am currently being bottlenecked by my cpu so overclocking the gpu does nothing XD

 

[smeezekitty]

The GPU core peaks at 58c but it has no vram temp sensor

 

[Danbuscus25]

you should be ok then

 

[smeezekitty]

you should be ok then

Well I am mainly worried about damaging the VRAM chips.

Thanks anyway though

 

[Deuce65]

you should be ok then

Well I am mainly worried about damaging the VRAM chips.

Thanks anyway though

Just purchase some small heatsinks; they make them for just that very thing.

 

[Danbuscus25]

nice