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Need CPU that wont bottleneck high end GPU's

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  • CPUs
  • Bottleneck
  • AMD
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April 4, 2012 9:28:07 AM

Im looking for an AMD CPU that will be able to run around three hd 6000 series graphics cards in crossfire without bottleneck. Im looking for a powerful and fast amd cpu.

Will a Phenom II be able to handle this? Or should I go with the AMD FX 8150?


Thanks.

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April 4, 2012 9:37:30 AM

electricfirebolt said:
Im looking for an AMD CPU that will be able to run around three hd 6000 series graphics cards in crossfire without bottleneck. Im looking for a powerful and fast amd cpu.

Will a Phenom II be able to handle this? Or should I go with the AMD FX 8150?


Thanks.



Ok, firstly you need to tell us what you have now as far as a PC specs are, exactly what 6000 series cards do you have, and what is your budget?
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April 4, 2012 9:43:48 AM

Are you running 3 monitors? or 1? If so what res...

Obviously you can shift the bottleneck to the GPU's if you are running high enough resolution, if you are running low res you have no need for your monster setup.

As for the FX series, NO, sandy bridge i5-2500k OCed and over methinks
April 4, 2012 9:45:18 AM

Ok, Here is my specs.

Case: SilverStone Full ATX Case (Unsure on model but reliable and good airflow) - Purchased
Ram: DDR3 16gb 1600Mhz - Purchased
PSU: 1000W 80Plus - Purchasing
Motherboard: MSI 990FXA-GD80 - Purchasing
GPU's: 2x6850's (2GB Versions) Upgrading to triple/dual 6950 infuture.



April 4, 2012 9:59:13 AM

Im stuck between the FX and the Phenom II, The phenom has 6 physical cores whereas the FX 8150 really only has 4 physical cores.
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April 4, 2012 10:05:00 AM

Why AMD, you haven't commited to the MOBO (as in already bought it). Simple fact, you are not getting as good value going AMD at this time in the desktop space.

If you were buying an entry/mid level laptop different story. But this is the truth.

The impartial enthusiast can see that the sandy bridge architecture offers better performance/price for now. Roll on piledriver and change things please. but right now no contest.
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April 4, 2012 10:09:05 AM

Yeah sad to say you should be looking at intel although thats gonna be expensive for a triple crossfire board,
The only Amd cpu to get would be say a 1090t or 1100t although there hard to find then oc it on a decent cooler to at least 4.0ghz.
April 4, 2012 10:09:13 AM

My budget cannot support Intel CPU's, I originally considered them but there just too much.
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April 4, 2012 10:10:46 AM

i'd stop purchasing that mobo and get a 2500K setup and OC it.

if you want to stick with AMD then thats your choice, but it won't be as good.
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April 4, 2012 10:17:20 AM

you would be much better off going dual 7870 no by selling your 2 6850.
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April 4, 2012 10:25:03 AM

ASUS P9X79 PRO I have found for not a huge amount more (£50 or $75) with tri X-fire, and you would save almost that much buying the i5 2500k over the FX8150.

I think that if you are making the choice at least recognise that it is biased and you are conciously choosing to support AMD at a cost to yourself. Go you!

I will remain impartial and get the best for my budget.
April 4, 2012 10:29:59 AM

How you found that motherboard at that price is a mystery to me becouse I cannot.
April 4, 2012 11:29:36 AM

I can get the 990fx one for cheaper. Im also uk based.
April 4, 2012 12:03:23 PM

hello m8,

If you are on a tight budget theres really no need to go 3 way 6950 as 2 7870 would have better performance that saves you some money even two 7850 is probably good enough if you dont go past the 3 monitor config otherwise crossfire is a bit hard to justify unless you're above 1080p resolution. you can probbly get a good z68 MB for the same 140 which is able to do 3 way crossfire, but since you probably dont need it a mATX Z68 able to do it is even cheaper. SInce you saved money (around 100$ maybe a bit more) for going 2xcrossfire you'll be able to purchase i5 2500k and a good aftermarket cooler so that you achieve lets say at least 4.0ghz easily and that would give you like 20 fps more then a phenom at 3.7ghz oc in most games at 1080p.

Thats just my opinion, if you choose to go amd i wish the best of luck finding a pII x6 1100t because any other will never cut it.
April 4, 2012 12:10:16 PM

Quote:
ASUS P9X79 PRO I have found for not a huge amount more (£50 or $75) with tri X-fire, and you would save almost that much buying the i5 2500k over the FX8150.


That motherboard will not support i5 2500k since it is lga 2011 and the i5 is lga 1155 these are diferent sockets.
The cheapest cpu for that mobo is still more expensive than a i7 2600k which itself offers no real considerable advantage in gaming over the i5 2500k.
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April 4, 2012 12:18:53 PM

i7 2600k is also skt 1155.
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April 4, 2012 12:29:08 PM

sorry, my bad. totally right ^^...

Still I think tri-x-fire z-68 would be in the same price area.

and as for getting the 990fxa gd80 cheaper I would like to know where?
April 4, 2012 12:39:11 PM

Quote:
i7 2600k is also skt 1155.


I didnt say it wasn't...what i meant was if i7 2600k which is lga 1155 doesnt offer a considerable gain in gaming than a i5 2500k then theres no need to go lga 2011 with the cheapest processor which would be i7 3820. (the cheapest because he is on a budget)

i7 3820 + lga 2011 mobo should come around 150$ more than the i7 2600k mobo and this last one would cost 80$ more than if you go with i5 2500k. Since neither of the first two is actually offering any gains in gaming compared to the i5 2500 and sometimes the 2400 I cant see the point of considering the x79 motherboard.

That was my point...
April 13, 2012 12:49:00 PM

hey everyone
just wondering if I had an i7 3820 @ 4.5ghz

would it bottleneck my 4 way SLI gtx 680s?

thanks for the help! :) 
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April 15, 2012 4:40:23 PM

Russell_PC said:
hey everyone
just wondering if I had an i7 3820 @ 4.5ghz

would it bottleneck my 4 way SLI gtx 680s?

thanks for the help! :) 


I hit my head against the wall in actual disbelief at your question!!!!!!!!!!!
April 17, 2012 9:26:16 AM

haha i know its a bit much,
but im a little bit of an extremest haha

do you know if 4.5ghz would bottleneck tho?
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April 17, 2012 9:52:17 AM

Russell_PC said:
haha i know its a bit much,
but im a little bit of an extremest haha

do you know if 4.5ghz would bottleneck tho?


To be honest i have absolutely no idea, for what exactly do you need 4 x 680s? what res do you play at? you do realize the diminishing returns on quad sli are horrendous, what exactly is your rig,, pc case, psu, hdds, memory etc etc ??
April 17, 2012 10:22:57 AM

haha thats a good question but i do need it (want it) haha.
only cause I have 3 x 120mhz monitors in 3d, and I want the framerate to meet the refresh rate, haha as I said, I'm an extremist. I also have a thing for maxing game settings out and I refuse to lower settings including AA and such.

And my system specs are:

monitor:
3 x ASUS VG Series VG278H Black 27inch Nvidia 3D

Drives:
1 x Agility 60 gb SSD boot drive
1 x 1tb seagate sata 6gb/s HDD
2 x samsung dvd/cd RW drive

case:
1 x Level 10 gt

Components:
1 x i7 3820 3.6ghz OC at 4.5 ghz
1 x cooler master hyper 12 evo
1 x Asus Maximus IV Formula
4 x Evga gtx 680s
4 x 4gb g.skill z series 2133mhz ram (16gb)

power supply:
1 x cooler master AX 1200W

anyway :) 
I know you dont NEED 4 x 680s for this setup,
but i still think its worth it for the performance increase

anyway, is my 4.5ghz bottlenecking my 680s?

cheers!
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April 17, 2012 10:27:26 AM

if your stuck with an amd platform already then get a 960t and overclock the beans out of it... you may just get enough bandwidth not to bottleneck 2 680s but its doubtfull... even the highest end bulldozer will have issues at some point because of its poor single threaded performance. as you know not all games use 8 threads. in fact most use less than 3 so the 680 will choke sooner or later but sooner if you use 2 of em...

4 680's is a waste of time unless your gonna put em on a 2011 socker board as the pci wont have enough bandwidth to cope. even then i cant see any real reason to go that far with them cards unless your doing semi pro rendering... for gaming its just way past overkill as 1 card can max out every current game and give 60fps minimum even bf3 with x4 aa so 2 would be more than enough... you really would be wasting 1200 bux /900 quid... if you got 4 of em as 2 would never be used...

April 17, 2012 10:33:39 AM

the asus rampage iv formula is a 2011, and effectively so is the i7 3820.
^ read my system specs and preferences above. 4 way is necessary for what my preferences are.
April 17, 2012 5:16:54 PM

Pedrovsky said:
hello m8,

If you are on a tight budget theres really no need to go 3 way 6950 as 2 7870 would have better performance that saves you some money even two 7850 is probably good enough if you dont go past the 3 monitor config otherwise crossfire is a bit hard to justify unless you're above 1080p resolution. you can probbly get a good z68 MB for the same 140 which is able to do 3 way crossfire, but since you probably dont need it a mATX Z68 able to do it is even cheaper. SInce you saved money (around 100$ maybe a bit more) for going 2xcrossfire you'll be able to purchase i5 2500k and a good aftermarket cooler so that you achieve lets say at least 4.0ghz easily and that would give you like 20 fps more then a phenom at 3.7ghz oc in most games at 1080p.

Thats just my opinion, if you choose to go amd i wish the best of luck finding a pII x6 1100t because any other will never cut it.


+99
April 19, 2012 3:20:13 AM

Anyway, doesn't really matter why I need 4 x 680s.
All I really want to know is weather or not my i7 3820 overclocked to 4.5ghz will bottleneck these 4 cards.

thanks! :) 
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April 19, 2012 2:31:47 PM

its possible but it would depend on the software your running as much as the hardware.
there are issues with scaling when you get 3 or more cards. 2 cards should give 80% increase 3 cards may add another 50% but 4 your looking at between 5 and 20 percent only (as far as i know)... this may change when you put the cards on a pci-e 3.0 board. i dont think the low scaling is due to the cpu but rather a limit of the pci-e bandwidth.

April 20, 2012 3:18:25 AM

yeah PCI 3.0 is the way to go haha
so hopefully my board should do the trick then if its more so the high bandwidth that effects the scaling?
so you think at 4.5ghz I should be alright?
!