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Is my i7 920 a bottleneck for my AMD Radeon 7950 boost?

post #1 of 39
Thread Starter 
These are the main parts of my whole system.

Intel i7 920 @ Stock(Can't overclock because of motherboard limitations)
8GB DDR3 @ 1066MHz
AMD Radeon 7950 @ 1125/1375
640 GB 7200RPM HDD

At those clockrates my 7950 should be close to a 7970GHz, and a good amount stronger than the 7970, but after looking at these andandtech benchmarks, my performance isn't even close.

The main diffrence is that anandtech has an i7 3960X @ 4.3GHz and 8GB of DDR3 @ 1866 MHz

Hitman Absolution
http://images.anandtech.com/graphs/graph6994/55136.png


I get 41FPS at the same settings. They get 52FPS with a weaker card(stock clock 7970) And almost 60FPS with the 7970GHz. I really really want to hit 60FPS in my games but it seems like I always fall short despite my GPU.

Sleeping Dogs
http://images.anandtech.com/graphs/graph6994/55144.png
http://images.anandtech.com/graphs/graph6994/55148.png

They get 87.4FPS average with a 7970 and a 59.9FPS minimum with a 7970. I get 73.6FPS average and 46.3 minimum on my card. Not complaining but I'd really love to be able to run the game at 60FPS locked all the time like they are.

In other games in the testing like Crysis 3 and Fary Cry 3, I don't get performance like they do either.

In the Valley Benchmark I get 37FPS at Extreme HD, and I noticed most other people with overclocked 7950s get better performance

Is my CPU and RAM speed really that big of a bottleneck? I know the i7 920 is old, but I never thought that it was actually a bottleneck in real world performance, especially at a GPU limited resolution like 1920 x 1080 with anti aliasing. It's actually annoying me because I got my card to experience perfect 60FPS 1080p gaming for the first time, and in a lot of games I only get about 40FPS where I see benchmarking sites getting 60FPS in the same areas.

It makes me feel like upgrading my CPU and mobo, but that's gonna cost a lot of money. Feels bad man...
    
CPUMotherboardGraphicsRAM
Intel Core i7 920 Dell 0R849J Sapphire Radeon 7950 @ 1125MHz/1375MHz (1.175v) 8GB DDR3 
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640GB Western Digital Windows Vista Home Premium 64bit 20" Dell S2009W 1600 x 900 Corsair GS 600 Watt 
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post #2 of 39
No it is not. If anything you should OC your 920, it is still an excellent processor.
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post #3 of 39
Quote:
Originally Posted by Woundingchaney View Post

No it is not. If anything you should OC your 920, it is still an excellent processor.

As stated in the OP, he can't overclock.

The 920 (when overclocked) won't even bottleneck a Titan, and at stock it shouldn't bottleneck a 7950. It's probably a combination of stock clock speeds on the 920 and the fact that you have a 7950 and not a 7970 (clock speeds aren't everything). I don't know if Hitman is CPU intensive, but having a stronger CPU, like their 3960x could help but that doesn't mean your 920 is bottlenecking your GPU.
Edited by ImmortalKenny - 5/31/13 at 7:48am
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post #4 of 39
Yes @ 2.66GHz its will bottleneck in a lot of games. Something like 4.0Ghz or a new IVY CPU will get you 20-30% extra performance. Some games that might not be the case but in most it will.
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post #5 of 39
37 in valley at 1125/1375? i got that at stock (7950) but my i7 SB was oc'ed to 4.5GHz. most prolly the stock 920.

edit: you've replaced that psu, right? i am not sure about the 8GB but you may not be taking advantage of triple channel.
Edited by rdr09 - 5/31/13 at 7:55am
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post #6 of 39
Quote:
Originally Posted by Koogiking View Post

Is my CPU and RAM speed really that big of a bottleneck?

Yup. Your CPU at stock 2.93GHz and ram at 1066MHz are definitely the causes. Now if you were able to push your 920 to around 3.8GHz and grab a kit of 1600 ram you'd be close to the Anandtech 7970GHz score.
post #7 of 39
I have measured that Core 2 Quad clocked to 3400Mhz is a perfect match to HD 7970 clocked to 1090Mhz.

If you can use any kind of comparation between Core 2 Quad and your I7 920 it will help you...
post #8 of 39
Get a new motherboard and unleash the potential of that i7-920

Here is used one if you want to save $$$
post #9 of 39
well i noticed that if my cpu @ stock and gpu overclocked fps is 20 lower then overclocked, but thats in bf3 and it will bee the bottle neck in the game @ 4ghz the cpu limitation is gone.
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post #10 of 39
Thread Starter 
Quote:
Originally Posted by rdr09 View Post

37 in valley at 1125/1375? i got that at stock (7950) but my i7 SB was oc'ed to 4.5GHz. most prolly the stock 920.

edit: you've replaced that psu, right? i am not sure about the 8GB but you may not be taking advantage of triple channel.

Oh yeah, I replaced the PSU a long time ago. I gotta update my system in my sig.

My RAM configuaration is really weird. My PC was originally a Dell, they sold the system with 4 x 1GB RAM @ 1066MHz. I later on added a single 4GB stick of RAM. So all in all it adds to 8GB, but it's probably all running in single channel.
    
CPUMotherboardGraphicsRAM
Intel Core i7 920 Dell 0R849J Sapphire Radeon 7950 @ 1125MHz/1375MHz (1.175v) 8GB DDR3 
Hard DriveOSMonitorPower
640GB Western Digital Windows Vista Home Premium 64bit 20" Dell S2009W 1600 x 900 Corsair GS 600 Watt 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel Core i7 920 Dell 0R849J Sapphire Radeon 7950 @ 1125MHz/1375MHz (1.175v) 8GB DDR3 
Hard DriveOSMonitorPower
640GB Western Digital Windows Vista Home Premium 64bit 20" Dell S2009W 1600 x 900 Corsair GS 600 Watt 
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