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Will C2D E7600 bottleneck 2x5770?

post #1 of 25
Thread Starter 
Hi!

I'm thinking of getting another 5700 for crossfire a few weeks later, but I don't know if the E7600 will be enough to handle them well.

Also I'm thinking of the PSU either, but as I have seen, the power consumption won't go over 180W under load, so I guess it can handle another 108W (that would be 288W).
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post #2 of 25
It shouldn't bottleneck. But your power supply is gonna be an issue. What is your 12v Rail rating?
My HD5770 has a hard time running off a 550w PSU with 38A 12v Rail.
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post #3 of 25
Thread Starter 
I'm sorry, I forgot that I've upgraded my PSU a while ago.
Now I have this 560W one: http://www.highpowersupply.com/hpc5x0A12C.html

It will be enough, right?
Edited by Xmister - 2/23/11 at 7:08am
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post #4 of 25
Thread Starter 
Quote:
Originally Posted by hellfire72 View Post
It shouldn't bottleneck.
I hope so, I just asked because I've seen at guru3d ( here and here ) that even an i7 920 bottlenecked a 3-way crossfire, that's why I was curious if an e7600 can handle a 2-way..
Edited by Xmister - 2/23/11 at 1:09pm
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post #5 of 25
In certain games, yes it will bottleneck, in most games it will not.

560w should be fine IMO, providing you don't have 3 hard drives or anything like that.
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post #6 of 25
Thread Starter 
I'm thinking of instead buying a new 5770 to cf, selling the old one and getting a 6950 which I can flash to 6970.

But that's a very new card, and the question is the same: How much this CPU would bottleneck it?
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post #7 of 25
As far as the bottleneck, I'm not sure why you would care.
It's a dual core, so it's going to be a bottleneck on any games that benefit from more than 2 cores. It's a FAST dual core though, so on most other games it's going to be fine.
Certain games are more CPU, or GPU, dependent, so it's not like you'll be maxing out the 5770CF or the 6970 all the time anyway regardless.
A lot of people will say to go for the single 6970 and CF it later. Problem is, they said the same thing with the 5770 when that was new. Whenever the 7000 series comes out, they will tell current 6900 series owners to sell their single card and get a 7000 that they can crossfire later.
It really depends on how much you can get for your 5770 now, and how much you want to put into a new GPU. Another 5770 can be had for $100 pretty easily right now.
A 6970 isn't a giant leap over a 5870, and the 5770CF comes really close to a 5870.
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post #8 of 25
Thread Starter 
The only thing why I would think about the 6970 instead of another 5770, that currently I don't have a crossfire capable board, so I would have to buy a new (and the two would be close to 6970 price range). But LGA775 is quite an old architecture, so I couldn't use that board for a long time anyway. And 6970 is the top ATi card right now, so I can probably prolong it to the new rig if I decide to upgrade in the future(maybe cf it then).
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post #9 of 25
Quote:
Originally Posted by Nixuz View Post
As far as the bottleneck, I'm not sure why you would care.
It's a dual core, so it's going to be a bottleneck on any games that benefit from more than 2 cores. It's a FAST dual core though, so on most other games it's going to be fine.
Certain games are more CPU, or GPU, dependent, so it's not like you'll be maxing out the 5770CF or the 6970 all the time anyway regardless.
A lot of people will say to go for the single 6970 and CF it later. Problem is, they said the same thing with the 5770 when that was new. Whenever the 7000 series comes out, they will tell current 6900 series owners to sell their single card and get a 7000 that they can crossfire later.
It really depends on how much you can get for your 5770 now, and how much you want to put into a new GPU. Another 5770 can be had for $100 pretty easily right now.
A 6970 isn't a giant leap over a 5870, and the 5770CF comes really close to a 5870.
This is a great way of putting it.

@OP, you are in abit of a dilemma.
You have two options.
1) If you go for an extra 5770 and new board, you will be stuck for options 1-2 years down the line, but you will have the latest board.
2)if you go for a 6970, you will have better performance but you will need to upgrade the board soon.

My advice: If you can get a new board/cpu and 5770 cheaper than a 6970 then go for it. It will perform slower in older games optimised for dual core (especially games that dont surpport crossfire), but for newer games i would bet that a 6 core with crossfire 5770s would beat a dual core and 6970.
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post #10 of 25
Thread Starter 
Quote:
Originally Posted by andypc View Post
My advice: If you can get a new board/cpu and 5770 cheaper than a 6970 then go for it. It will perform slower in older games optimised for dual core (especially games that dont surpport crossfire), but for newer games i would bet that a 6 core with crossfire 5770s would beat a dual core and 6970.
If I would buy a new CPU+MB then I would buy AMD 1090T, and then these two would cost just like a 2GB 6970. Also I would have to buy another 5770 too.
So it would be more costly.
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