Crossfire benifits ?

[Treebo88]

I'm back yet again for a stupid question thats already bin anwered in so many different ways on google etc i have to rely on the pro's to satisfy my need for knowlage

I have a i5 rig here that used to be used for a multimedia pc really just films etc on my tv, I have since put it all in a different case and have bin given a Sapphire 7850 1gb, And bin offered a second from someone else for £45 ...

Now im guessing the one 7850 1gb card will do ok for some black ops 2 zombies etc but now ive bin offered the other card im tempted but need some answers to a couple questions i have-

1-Will i see noticeable increases in frames p/s or not ?

2-Will the pc utilise both 1gb vram making 2gb or not ?

3-For the price of £45 am i getting value for money in the way of performance/benifits wise ?

Ive only ever gone with a single decent card ive never gone xfire before hence my noobness

And before its said yes ive searched but find many different answers but rather ask and get answers from experiance than here say hence my question on overclockers as you never seem to fail me yet !

 

[Megahackerd]

It would run better, the frames i dont and depend you your 2ng gpu
Mhd

 

[Idleman]

I'm back yet again for a stupid question thats already bin anwered in so many different ways on google etc i have to rely on the pro's to satisfy my need for knowlage

I have a i5 rig here that used to be used for a multimedia pc really just films etc on my tv, I have since put it all in a different case and have bin given a Sapphire 7850 1gb, And bin offered a second from someone else for £45 ...

Now im guessing the one 7850 1gb card will do ok for some black ops 2 zombies etc but now ive bin offered the other card im tempted but need some answers to a couple questions i have-

1-Will i see noticeable increases in frames p/s or not ? Yes

2-Will the pc utilise both 1gb vram making 2gb or not ? No

3-For the price of £45 am i getting value for money in the way of performance/benifits wise ? Yes

Ive only ever gone with a single decent card ive never gone xfire before hence my noobness

And before its said yes ive searched but find many different answers but rather ask and get answers from experiance than here say hence my question on overclockers as you never seem to fail me yet !

 

[oldestgregg]

For £45 its a defo yes! You should get around 70% scaling possibly more as the CPU shouldnt bottleneck it.

 

[tres_kun]

I find serious problems playing games at high settings with 1Gb of vram
and that being on a hd5850 20% slower then a HD7850
So get the other one and sell them
And stretch your budget to a HD7950 you will pourcese a bomb

With 1GB of VRAM crysis 3 has 70-80 gpu utilization and max memory consumption
Heck world of tancks runs out of vram on 1GB

 

[Puppetmaster]

I find serious problems playing games at high settings with 1Gb of vram
and that being on a hd5850 20% slower then a HD7850
So get the other one and sell them
And stretch your budget to a HD7950 you will pourcese a bomb

With 1GB of VRAM crysis 3 has 70-80 gpu utilization and max memory consumption
Heck world of tancks runs out of vram on 1GB

Can you provide evidence for this?

Because I just had a quick look at a 7850 is more than 20% faster over a 5850 and I can also tell you world of tanks is quite heavily CPU limited. Not to mention it doesn't support crossfire.

 

[Ferrari100]

I'm really hoping my 7990 overcomes the frame dropping issue with AMD's new catalyst release at the end of this month

 

[DaleTheWhale]

Can you provide evidence for this?

Because I just had a quick look at a 7850 is more than 20% faster over a 5850 and I can also tell you world of tanks is quite heavily CPU limited. Not to mention it doesn't support crossfire.

It make's sense what he stated, he was looking at the VRAM side of things and at 1080p, 1GB because very limited when you start bumping up the settings. So 2 cards at 1080p forcing out high/ultra graphics with 1GB VRAM, there's going to be a bottleneck somewhere down the line.

Sell both and get a 3GB 7950!

 

[Puppetmaster]

It make's sense what he stated, he was looking at the VRAM side of things and at 1080p, 1GB because very limited when you start bumping up the settings. So 2 cards at 1080p forcing out high/ultra graphics with 1GB VRAM, there's going to be a bottleneck somewhere down the line.

Sell both and get a 3GB 7950!

That maybe the case, but is it also not possible that hes just run out of GPU power or has a CPU that is holding him back?

When crossfire actually worked in WOT, I was very heavily CPU limited with 2 6970's and that's a with a 4.7GHz 2600K because the game only uses 1 thread. If he was using a 1156 or even 775 CPU with 2 cards with reasonable power, I'm sure he would have been held back by that.

 

[DaleTheWhale]

That maybe the case, but is it also not possible that hes just run out of GPU power or has a CPU that is holding him back?

When crossfire actually worked in WOT, I was very heavily CPU limited with 2 6970's and that's a with a 4.7GHz 2600K because the game only uses 1 thread. If he was using a 1156 or even 775 CPU with 2 cards with reasonable power, I'm sure he would have been held back by that.

I'm hoping he has the processor which is in his signature, a Haswell i7 will handle the cards fine, especially for a game of black ops 2 zombies!

 

[oldestgregg]

As long as he holds off on aa and msaa vram will be fine for now. If it was any more money I would have said no but its only £45 for quite a big boost in performance. Alkso the 6850 was slightly slower than the 5850 at launch but %5 tops and with drivers and such I would say that gap dosnt exist anymore.