Msi 5850 max stable oc ?

[abhishekshukla1989]

I have 5850 at 950/1250 stable at 1.2volts with max temp of 84'c with kombuster.Can i go higher than this ?
How much of an overclock would be enough for 5850 to reach 5870 stock level?

 

[Lmeow]

Well you probably could, if the temperatures allow it. Just keep it below 85°C and you should be fine. In terms of the HD 5850 to reach the HD 5870 stock speed, you've already gone past it - the stock speeds of the HD 5870 is 850/1200 IIRC, and to get HD 5870 performance, you'd need around 860/1220 on the HD 5850.

 

[abhishekshukla1989]

Wow only one reply.Anyway the voltage which i have applied (1.2 volts) ,is it safe for 24/7 operation?Also i can get 1000/1150 overclock on my card at the same voltages.Which one you think would be more beneficial in games 1000/1150 or 950/1250.And i was asking about how much of an overclock would be required to get at the same performance level of hd 5870 not same clock level.
Thanks for the reply.

 

[wolfram23]

I've been OCing my 5850. Right now at 1.187V I was a bit unstable with 950/1250 but it was stable at 950/1225. I noticed that over 900 I didn't gain any FPS with the mem at 1200, but bumping it up that 25 increased it by about 4. So, I think you'll be getting best performance from the 950/1250 set up.

I looked for max voltage on this card with no luck from AMD/ATI website. Afterburner help says (if I recall, might want to check it) a max of 1.5V for this card. I think it's mostly going to be limited by temps, then. With my OC set up, I set the fan to manual to go from 20% @ 50C up to 40%@80C, and so far the temps haven't even hit 80C.

I plan to up the voltage and memory speeds to try and get maybe 1250 or 1275 stable, then from there set the base speed to whatever will give the most FPS (It probably won't be over 950). Of course, that's assuming I can keep it under 85C. I hear they're ok up to 90s but no sense pushing it too hard.

 

[abhishekshukla1989]

I've been OCing my 5850. Right now at 1.187V I was a bit unstable with 950/1250 but it was stable at 950/1225. I noticed that over 900 I didn't gain any FPS with the mem at 1200, but bumping it up that 25 increased it by about 4. So, I think you'll be getting best performance from the 950/1250 set up.

I looked for max voltage on this card with no luck from AMD/ATI website. Afterburner help says (if I recall, might want to check it) a max of 1.5V for this card. I think it's mostly going to be limited by temps, then. With my OC set up, I set the fan to manual to go from 20% @ 50C up to 40%@80C, and so far the temps haven't even hit 80C.

I plan to up the voltage and memory speeds to try and get maybe 1250 or 1275 stable, then from there set the base speed to whatever will give the most FPS (It probably won't be over 950). Of course, that's assuming I can keep it under 85C. I hear they're ok up to 90s but no sense pushing it too hard.

So you are saying that I won't be gaining any fps above 950 core and memory clock should be of more concern regarding fps.

 

[wolfram23]

Well, that's just what I noticed. If you're using Kombustor just try fiddling with them to see what happens, but yea I definitely think that a really high core won't matter if the memory can't keep up.

 

[wolfram23]

Hey man, just thought I'd let you know. I tweaked a little more today and had an interesting result. With the mem at 1225 I decided to see what would happen and dropped the core speed to 850 - and I gained 1-2 average FPS (@54)! I then slowly increased the mem, at about 1240 I needed to up voltage a tad, and I eventually had it stable at 850/1260 (I forget the voltage) and the FPS were averaging 55 sometimes touching 56. Just to see what happens, I set it to 875/1260 and it ended up crashing so I guess I either need more voltage or need to make a smaller step.

Just fyi my test was set to 16x10 4xAA windowed.

If you notice a stutter/large drop in FPS, it means it's a bit unstable and when that happened I was increasing voltage by 0.005 each time. Seems to be a good method.

 

[abhishekshukla1989]

Hey man, just thought I'd let you know. I tweaked a little more today and had an interesting result. With the mem at 1225 I decided to see what would happen and dropped the core speed to 850 - and I gained 1-2 average FPS (@54)! I then slowly increased the mem, at about 1240 I needed to up voltage a tad, and I eventually had it stable at 850/1260 (I forget the voltage) and the FPS were averaging 55 sometimes touching 56. Just to see what happens, I set it to 875/1260 and it ended up crashing so I guess I either need more voltage or need to make a smaller step.

Just fyi my test was set to 16x10 4xAA windowed.

If you notice a stutter/large drop in FPS, it means it's a bit unstable and when that happened I was increasing voltage by 0.005 each time. Seems to be a good method.

Which test are you talking about ?

 

[wolfram23]

MSI Kombustor. You can do stress tests and benchmarking.

 

[abhishekshukla1989]

I am getting 84 fps average at my settings.