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Would the AMD Radeon 7850 bottleneck with a

Last response: in Graphics & Displays
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June 29, 2012 7:03:47 PM

So I'm at the last section of building my first PC, and I almost have enough to purchase everything. I was wondering if a SAPPHIRE Radeon HD 7850 2GB 256-bit, or a XFX Double D FX-785A-CDFC Radeon HD 7850 2GB 256-bit would bottleneck with a AMD Phenom II X4 695 BE. I was planning on OCing it to the 975 clock or a tad higher, could I do that with the stock fan? I will be buying a 750 Watt PSU by Corsair. I'm also wondering if my motherboard would be holding back the card as it only has a 2.0 PCI and the 7850 is a 3.0 card. Should I just try to find a different card with a 2.1 PCI?

Mobo - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

CPU - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PSU - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Sapphire 7850 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

XFX 7850 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

If anything is unclear please ask and I will specify.


P.s I plan on playing mainly FPS shooter games on a 24" HDTV 1080p and not any higher. The first game I will probably buy is BF3, and I'd like to run things as high as possible with 35+ frams average(Higher would always be better but ya' know..
June 29, 2012 7:12:48 PM

Sadtrial said:
So I'm at the last section of building my first PC, and I almost have enough to purchase everything. I was wondering if a SAPPHIRE Radeon HD 7850 2GB 256-bit, or a XFX Double D FX-785A-CDFC Radeon HD 7850 2GB 256-bit would bottleneck with a AMD Phenom II X4 695 BE. I was planning on OCing it to the 975 clock or a tad higher, could I do that with the stock fan? I will be buying a 750 Watt PSU by Corsair. I'm also wondering if my motherboard would be holding back the card as it only has a 2.0 PCI and the 7850 is a 3.0 card. Should I just try to find a different card with a 2.1 PCI?

Mobo - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

CPU - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PSU - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Sapphire 7850 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

XFX 7850 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

If anything is unclear please ask and I will specify.


P.s I plan on playing mainly FPS shooter games on a 24" HDTV 1080p and not any higher. The first game I will probably buy is BF3, and I'd like to run things as high as possible with 35+ frams average(Higher would always be better but ya' know..


NOOOO!!!!!
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June 29, 2012 7:16:39 PM

zloginet said:
NOOOO!!!!!

What? No bottleneck? Please specify.. and please tweak down the dramatics :p 
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a b U Graphics card
June 29, 2012 7:51:35 PM

there is no sign of bottleneck build look pretty strong.
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June 29, 2012 7:55:04 PM

xtreme5 said:
there is no sign of bottleneck build look pretty strong.

What about the fact of putting the 3.0 PCI card into a 2.0 PCI slot on the motherboard? I know it's backwards compatible but wont it hold back the card a little, and if so by how much would you estimate?
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a b U Graphics card
June 29, 2012 7:56:22 PM

there is indeed no difference between PCI-E 3.0 and 2.1 or 2.0 you can use any PCI-E 3.0 GPU into 2.0 slot without any issue/troubles. here is the picture.

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a b U Graphics card
June 29, 2012 7:56:51 PM

Sadtrial said:
What about the fact of putting the 3.0 PCI card into a 2.0 PCI slot on the motherboard? I know it's backwards compatible but wont it hold back the card a little, and if so by how much would you estimate?


If anything holds you back, it'll be the CPU, not the 2.0 slot. You can OC the CPU though, so that's not REALLY that big of an issue.
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a b U Graphics card
June 29, 2012 8:00:25 PM

Sadtrial said:
What about the fact of putting the 3.0 PCI card into a 2.0 PCI slot on the motherboard? I know it's backwards compatible but wont it hold back the card a little, and if so by how much would you estimate?

PCI-E 3.0 uses twice bandwidth as compared to 2.0, PCI-E 3.0 become useful only when you have two or more high end GPU's in SLI/CF. It will gives you 100% performance but when you are SLI/CF of pci-e 3.0 card into 2.0 slots you will notice a decrease in performance.
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June 29, 2012 8:16:02 PM

Best answer selected by sadtrial.
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July 1, 2012 1:50:42 AM

DJDeCiBeL said:
If anything holds you back, it'll be the CPU, not the 2.0 slot. You can OC the CPU though, so that's not REALLY that big of an issue.

What clock would you say I'd have to OC the CPU till it wouldn't be a bottleneck?
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a c 271 U Graphics card
July 1, 2012 8:34:57 AM

This topic has been closed by Mousemonkey
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