*** Official AMD 7990 Owners Thread ***

[LtMatt]

Currently pulling 1288 KH/s with GPU's at 69c/66c and VRM's at 70c, 1.15v 1000/1500

Atta boy, can probably lower the voltage further.

 

[apg]

Atta boy, can probably lower the voltage further.

hmmm, does your bios give lower temps?

im currently at 1390kh and temps 73/80 - voltage 1.1mv

 

[supergt]

not tried OC'ing these yet however I was curious as to whether running at stock but at 1.025v means that it could be a decent clocker?

 

[apg]

not tried OC'ing these yet however I was curious as to whether running at stock but at 1.025v means that it could be a decent clocker?

quite possibly but you will only know with testing....

 

[supergt]

i cant find any overclocked benchmarks, anyone got a link to some?

 

[thefogo]

not tried OC'ing these yet however I was curious as to whether running at stock but at 1.025v means that it could be a decent clocker?

Mine runs stock at 1.03v but can't oc over 1100 without artifacting

 

[gpuerrilla]

i cant find any overclocked benchmarks, anyone got a link to some?

Im sure Matt uses one or two

 

[LtMatt]

Wow thats some really low voltage for stock clocks their lads. My cores seem to like voltage sadly and i need 1.135v for 1000/1500. However i can bench mine at 1150-1175 without too much trouble.

 

[thefogo]

Yeah, that was a typo I meant 1.13

 

[Defy Belief]

Well well well...

Windows 7, struggling to hit 60 consistently dipping to around 45, max probably about 70. GPU usage at 55% or so.

Windows 8, It's back.

Never drops below 90 from playing a few matches, the drivers must work a hell of a lot better on Win8.


http://postimage.org/app.php


image

Note the dips in Afterburner for usage are from me dying as I was pretty much running around like a headless chicken looking at the fps monitor.

Anyone struggling with their FPS on Windows 7 I'd seriously look at booting up Windows 8.

 

[thefogo]

Damn, seems I have to get Windows 8

 

[LtMatt]

Defy have you got an i5?

 

[thefogo]

He has a 2500k IIRC.
Edit: close enough

 

[Defy Belief]

Defy have you got an i5?

Yeah a 3570k @ 4.4ghz.

Damn, seems I have to get Windows 8

I've just installed the 8.1 trial for now mate, will last 90 days then I'll purchase a key I think.

 

[thefogo]

Yeah a 3570k @ 4.4ghz.



I've just installed the 8.1 trial for now mate, will last 90 days then I'll purchase a key I think.

Oh I didn't realise there was a trial. I might try it out.

 

[LtMatt]

Defy have you got an i5?

He has a 2500k IIRC.
Edit: close enough

Yeah a 3570k @ 4.4ghz.

I take you all back to this and something i posted a while back. Took some flak for it at the time too. Windows 8.1 using DX11.1 gives a boost to cpu performance. Now if a small change to DX11 can improve cpu performance this much, what can a whole new API do aka Mantle?

EA-DICE' upcoming online shooter Battlefield 4 will take advantage of DirectX 11.1 API, on PCs running Windows 8 and Windows 8.1. Running the game with DirectX 11.1 will have a positive performance impact compared to running it on DirectX 11.0, or on older operating systems like Windows 7 (which doesn't support DirectX 11.1). In the words of the technical director behind Frostbite, the underlying engine for Battlefield 4, "We use DX11.1, there are some optimizations in it (constant buffer offsets, dynamic buffers as SRVs) that we got in to the the API that improves CPU performance in our rendering when one runs with DX11.1." This could give Radeon HD 7000 series GPUs an edge over their GeForce competitors. GPUs

http://www.techpowerup.com/191505/b...ies-directx-11-1-renderer-with-fallbacks.html

 

[Defy Belief]

Oh I didn't realise there was a trial. I might try it out.

http://technet.microsoft.com/en-gb/evalcenter/hh699156.aspx

I take you all back to this and something i posted a while back. Took some flak for it at the time too. Windows 8.1 using DX11.1 gives a boost to cpu performance. Now if a small change to DX11 can improve cpu performance this much, what can a whole new API do aka Mantle?




http://www.techpowerup.com/191505/b...ies-directx-11-1-renderer-with-fallbacks.html

The difference is about 100% for me.

 

[Mathematics]

Some of you guys are getting awesome temps on air!

Doing a spot of mining at the moment with temps in the low 90's with 1120mv, 1075/1475 with +25 power limit. Each GPU getting between 730-750 Khash/s.

Does anyone know how to disable CrossFire? Just want to try something, apparently CrossFire can reduce Hashing by approx 10%.

Also big thanks to LT Matt, my 7990 is like a new card now its been flashed, absolutely stunning graphics whilst gaming!

 

[LtMatt]

Some of you guys are getting awesome temps on air!

Doing a spot of mining at the moment with temps in the low 90's with 1120mv, 1075/1475 with +25 power limit. Each GPU getting between 730-750 Khash/s.

Does anyone know how to disable CrossFire? Just want to try something, apparently CrossFire can reduce Hashing by approx 10%.

Also big thanks to LT Matt, my 7990 is like a new card now its been flashed, absolutely stunning graphics whilst gaming!

Sound like you're using the old bios dude. Theres a new one (check the thread) which has a higher TDP at stock so now only up to +20% is required. The new bios removes a small throttling issue that sometimes occured on the old one, which you're currently using.

 

[Footyslayer]

I would highly recommend what Matt says above. The newer BIOS operates very well, thanks to Matt for his time producing it