How to overclock a 7850 past 1050MHz?

Arron17 · 11 May 2012 at 13:33

Ok, done some quick tests with Virtu MVP and there are massive differences.

I did these at Stock clocks with Heaven set to default apart from AA on x4 and tessellation on normal @ 1920 x 1080 with vsync on.

With Virtu MVP:
Run1: FPS = 39.5, Score = 996
Run2: FPS = 39.4, Score = 994

Without Virtu MVP:
Run1: FPS = 31.9, Score = 803
Run2: FPS = 31.9, Score = 803

So according to this Virtu MVP adds 8 FPS.
One thing I did notice though that was with Virtu MVP on I had some jitter when running through the benchmark but when I disabled it that jitter was gone.

VampyMage · 11 May 2012 at 13:35

My setting was default and AAx4 with tessellation on normal as well. 1920 x 1080 with no vsync on. Not sure how do I activate my gpu boost function though :O

Arron17 · 11 May 2012 at 13:39

VampyMage said:
My setting was default and AAx4 with tessellation on normal as well. 1920 x 1080 with no vsync on. Not sure how do I activate my gpu boost function though :O

I got a disc with my motherboard to install the Virtu MVP it uses the On board CPU GPU to boost performance. You might have one on your motherboard disc, alternatively go to your motherboard manufacturers website and Look for a Virtu MVP download. What motherboard do you have?

G-Sharp · 11 May 2012 at 13:47

tuffluck said:
i really don't believe that on the fans. you may want to try and run another program. i have 1200/5800 with fans on auto, and i think it gets up to 47%, but temps top out at 71c under 100% load for an hour. i have the same card as you.

What case do you have?

In the FT02 (known for being one of the best air cooling cases), with the settings I quoted (1190/5800 @ 1.25V), I get to 55 degrees C max in one run of Heaven DX11 (4xAA/1920x1080, medium tessellation) with the case fans on high and 57 degrees with the case fans on low with the GPU fans at 40%.

VampyMage · 11 May 2012 at 13:50

Arron17 said:
I got a disc with my motherboard to install the Virtu MVP it uses the On board CPU GPU to boost performance. You might have one on your motherboard disc, alternatively go to your motherboard manufacturers website and Look for a Virtu MVP download. What motherboard do you have?

I got the Asus P8H77-M LE, will check out the gpu boost feature later!

Twirlywoos · 11 May 2012 at 13:51

HeX said:
If BF3 is fine, I'd say it was Sniper Elite that is buggy tbh.

What do you mean by GPU spikes?

I just watched a video that said AF has the biggest performance impact on a GPU. AA is not needed as much if you game in 1080p. So I'll reduce AA and up AF.

At default Sniper Elite V2 has 16AF which is causing the crashing.

masto · 11 May 2012 at 14:38

Parkour82 said:
I have found that setting a user defined fan profile give much better results than just leaving the fans on auto. Currently running at 1200/5500 with only 1.155v. Temperatures max out at 56oC. Stable in Heaven, 3dmark11, Crysis 2 benchmark and a couple of hours playing Batman Arkham City.

I had a quick go at sorting out my fan profile, and managed to get 1180 stable at the same voltage as my previous 1160 max, so there's definitely still some scope for improvement there. Hopefully I'll get to play around a bit more over the weekend and reach the 1200 mark...

HeX · 11 May 2012 at 15:07

majnu said:
I just watched a video that said AF has the biggest performance impact on a GPU. AA is not needed as much if you game in 1080p. So I'll reduce AA and up AF.

At default Sniper Elite V2 has 16AF which is causing the crashing.

AF barely takes any GPU power these days, it's super efficient, you should just bang full (16x) AF on every game you play.

AA has a much bigger impact on performance than AF does.

VampyMage · 11 May 2012 at 15:47

Looks like the best settings for me now is 1150/5500 @1.145v, managed to play Crysis 2 for 1 hour without crashing. 1200/5800 @1.18v was good for 30mins then the grahpics in game starts to go haywire and I have to restart the game again for it to be normal. Guess the i5-3450 aint a good CPU to handle intense OC for the gfx card.

Twirlywoos · 11 May 2012 at 15:48

HeX said:
AF barely takes any GPU power these days, it's super efficient, you should just bang full (16x) AF on every game you play.

AA has a much bigger impact on performance than AF does.

These are spikes I refer to which has to be the cause for the game to crash.

I've not overclocked my i5 3750k and I have 16Gb Ram too, so I have not got the foggiest why it crashes all the time. When I turn down AF the GPU usage is at a steady level.

Arron17 · 11 May 2012 at 16:15

Ok, I'm confused as what Virtu MVP does or is supposed to help...

It increased my FPS a lot in the heaven benchmark, but I've just done a Crysis 2 Bench and it's killed the performance.

With stock clocks and with the settings in the Crysis 2 dx 11 thread I got Avg FPS with Virtu MPV = 19.1 and then Avg FPS WithOut Virtu MVP 40.7.

Would would it be killing performance in crysis and not in benchmarks. Is it better to OC with it off?

Arron17 · 11 May 2012 at 16:23

Ok now I'm even more confused, just ran the same bench but with the clocks at 1200/1250, there's still a drop in performance using Virtu MVP but this time it's only 4 FPS rather than the 20FPS at stock clocks.

lewism · 11 May 2012 at 17:23

lewism said:
Are people getting these results with any 7850? There's one for sale on offer this week only and i'm considering getting it if these overclocks are across the board.

this - http://www.overclockers.co.uk/showproduct.php?prodid=GX-295-SP&groupid=701&catid=56&subcat=411

or this - http://www.overclockers.co.uk/showproduct.php?prodid=GX-052-HS&groupid=701&catid=56&subcat=411

Anyone?

Double07 · 11 May 2012 at 17:26

Ive got the IceQ and it is stable at 1200/5500 @ 1.165V with temps running in the mid 50s. I could push it more and it's stable enough but I didn't see the point for general use.

psychodil · 11 May 2012 at 17:27

lewism said:
Anyone?

Certainly more likely with these non reference coolers. The twin frozr and these cards have a better chance than the reference cards of hitting higher clocks and remaining quiet at the same time :-)

Jschatt · 11 May 2012 at 17:40

I just recently bought an XFX 7850. I wiped all of the drivers off of my pc, downloaded Asus GPU Tweak, and downloaded the 12.4 Beta Display Drivers (but nothing else, so no CCC). However, when I go to advanced mode in GPUTweak, I can check the Overclocking Enhancement thing, but I don't have an option to change the voltage. The voltage doesn't even show up on the screen (next to GPU Clock, Memory Clock, and Fan Speed.) Any ideas why this would happening and how I could make the Voltage adjustable?

formula44 · 11 May 2012 at 19:17

Hi all,

Just want to share my Sapphire 7850 (non OC edition) result on Default Voltage (1125/1500)

3DMark Vantage

3DMark 11

Heaven 3.0

I used it for 24/7 and rock stable on game too. Here is some result on Batman AC 1.2

Physx off

Physx On

Arron17 · 11 May 2012 at 20:11

Think I've got my final stable clocks at 1200/1500 @ 1.185v

I get FPS = 57.8 Scores = 1455 in Heaven with Virtu MVP off
And I get FPS = 82.6 Scores = 2081 with Virtu MVP ON

Twirlywoos · 11 May 2012 at 20:34

that's a huge increaswe running with virtu mvp, when I turned mine on I got 0.01% increase. Is there a way to set it up for Heaven ?

Arron17 · 11 May 2012 at 20:41

It's set up by default in mine.

If you go into the applications bit in the settings Heaven should be listed. If it's not add it and tick the H box for HyperFormance.