*** Official Radeon HD5800 Series Overclocking Thread ***

[ieatrawbacos]

The 9.11 betas have been out for a week.

http://developer.amd.com/gpu/ATIStre...s/default.aspx

[Mungri]

I got some results at last for my Xfire 5770s

The CPU is running at 3780 Mhz with turboboost, and the vga ram is at stock speed of 1200 Mhz in each run.

GPU @ 850 Mhz, P14690

GPU @ 900 Mhz, P15578

GPU @ 960 Mhz, P16124

They seem to respond really well to GPU increases, just hope I can unlock the upper limit to 1 Ghz and up soon. I'll be increasing the ram speed next.


Keeping the GPU at 960 Mhz, and increasing the ram:

Ram @ 1250 Mhz, P16797

Ram @ 1300 Mhz, P17020

Performance decrease at 1350 Mhz ram - P16773 (I tried two runs, similar result both times).

Ram @ 1445 MHz, P17215

It makes no sense overclocking the ram beyond the rated speed of 1250 Mhz, the gains above this frequency are pointless, but overclocking the GPU on these is good.

[CrimInalA]

The thread is called 5800 series overclocking thread . and you are posting 5700 series ? or did i miss something

[Mungri]

I think you missed the first line of the OP:

Official HD5870 / HD5850 / HD5770 / HD5750 Overclocking Thread

:p

[VOID WARRANTY]

The thread is called 5800 series overclocking thread . and you are posting 5700 series ? or did i miss something

Dont call the cops

[CrimInalA]

I think you missed the first line of the OP:



:p

so i DID miss something
got me abit confused but i'm all with you now

[Astennu]

I got some results at last for my Xfire 5770s

The CPU is running at 3780 Mhz with turboboost, and the vga ram is at stock speed of 1200 Mhz in each run.

GPU @ 850 Mhz, P14690

GPU @ 900 Mhz, P15578

GPU @ 960 Mhz, P16124

They seem to respond really well to GPU increases, just hope I can unlock the upper limit to 1 Ghz and up soon. I'll be increasing the ram speed next.


Keeping the GPU at 960 Mhz, and increasing the ram:

Ram @ 1250 Mhz, P16797

Ram @ 1300 Mhz, P17020

Performance decrease at 1350 Mhz ram - P16773 (I tried two runs, similar result both times).

Ram @ 1445 MHz, P17215

It makes no sense overclocking the ram beyond the rated speed of 1250 Mhz, the gains above this frequency are pointless, but overclocking the GPU on these is good.

Can you do the same tests with a game ? like DOWII or FC2 ?
I find the boost with the higher core speeds strange. You would think these GPU's would be bandwith limited. And i still think a 850 MHz 5770 should be faster then a HD4870 1gb but its not. the 4870 is about 8% faster.

[Mungri]

That is exactly what I thought, that these cards were bandwidth limited so the ram increases should have helped, but they dont. It seems to be overclocking the GPU on them that makes them a lot better. I would like to be able to get them to 1 Ghz.

I think the ram timings mess up above 1300 Mhz or something, because something causes it to loose prformance at 1350 Mhz.

I'll look for the Far Cry II benchmark now, I dont play FPS games but will see if I can get the benchmark. I've kept the cards clocked at 960 / 1300 for to test for stability in games, and they've been fine in a few MMO's, but I had to increase the voltage slightly from 1.13v to 1.16v to stop the display driver from crashing.

I think the 5770 is currently so much slower then the 4870 due to immature drivers, at least overclocking it brings it up to par with the 4800's somehow. One way to test would be underclock a 4870's ram down to half the clock of the 5770 so both have the same bandwith, while underclocking the 5770 GPU to the same as the 4870, but my 4870's are already wrapped up ready to post so Im not doing that.

Seems like I cant get the FC2 benchmark without buying the game, so I cant do that.

[mR Yellow]

I think the ram timings mess up above 1300 Mhz or something, because something causes it to loose prformance at 1350 Mhz.

Yes, your performance will get worse because the error correction is hitting in.

[Andrea deluxe]

whath is the max voltage for a 5870 gpu?

i try 970mhz with 1.3v but if i try 1000mhz system crash....

any help?

[mR Yellow]

whath is the max voltage for a 5870 gpu?

i try 970mhz with 1.3v but if i try 1000mhz system crash....

any help?

I get 1ghz on the core with 1.274 volts.

[Andrea deluxe]

I get 1ghz on the core with 1.274 volts.

my gpu can't get 1ghz....

i have try 1.35v....

but at default voltage get 925mhz.....

[billdavis]

whath is the max voltage for a 5870 gpu?

i try 970mhz with 1.3v but if i try 1000mhz system crash....

any help?

right now via software is 1.35v

processors usually like cold as much as volts so if you cant add volts add cooling

[Henry]

5850 CF @ 1075/1300 + GTS 250 (As PhysX)

[jaredpace]

That's a sweet setup, Henry. Thanks

[Henry]

@jaredpace : Thanks m8

A little update :



My RIG

[Chri$ch]

now with EK Waterblock

[Utnorris]

Ok, so here my latest at 1100/1298 at 4.6Ghz on my I7 920. I found that the drivers pre-10/13 actually give me a better score. I think I have more still, so I am going to keep playing with it.

[Utnorris]

How far will she go:

[Utnorris]

1125 seems to be the highest Core I can bench at. Not too bad of an overclock. Also, that is with the EK block on water at 1.35v.

[jaredpace]

1125 seems to be the highest Core I can bench at. Not too bad of an overclock. Also, that is with the EK block on water at 1.35v.

Thanks utnorris! How hot are the vrms? Can you show a few instances of GPU-Z?

[gabe]

1125 seems to be the highest Core I can bench at. Not too bad of an overclock. Also, that is with the EK block on water at 1.35v.

You should always clarify, on "chilled" water ;-) - A lot of readers do not measure their water-temps, so they have no point of reference with your 21c.

[Draxx]

right now via software is 1.35v

processors usually like cold as much as volts so if you cant add volts add cooling

My Asus 5870 with Smartdoctor allows upto 1.5v

[Gaul]

My Asus 5870 with Smartdoctor allows upto 1.5v

and with vgpu 1.5, max u got for gpu ? 1100 ? 1075 ?

[Utnorris]

You should always clarify, on "chilled" water ;-) - A lot of readers do not measure their water-temps, so they have no point of reference with your 21c.

True, but it is in my sig and usually most GPU only loops are not that far above ambient with a triple rad. But I will in the future. The only reason I give the water temp is so people know the delta between water temp and the actual GPU temp just in case they were considering the EK block. I am sure you can appreciate this since you make a water block for the HD5870 also. I will list the fact that it is a water chiller in the future for reference.

As far as my VRM's, not sure, but all three temps from Everest are within 2c of each other. Look on the far right of my SS and you will see them in the list.