Balanced choice of CPU to GPU.

April 4, 2011 at 14:53:31
Specs: Windows 7, 8 GIG
When does the CPU actually bottleneck the GPU? Can you give specific instances?

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April 4, 2011 at 21:45:51
A CPU Bottlenecks a GPU.When The GPU is more power full than the CPU or the GPU can process more than the CPU

Some instences of bottle neck are:

if you have a pentium 4 and an nvidia geforce gtx 580 or a gtx 260 then the CPU bottle necks the GUP.But if you have a core 2 duo e8400 @ 3.0 Ghz and an nvidia geforce gtx 580 or a gtx 260 then the CPU dosent bottleneck the GPU.Because the core 2 duo e8400 is faster than the GPU

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April 4, 2011 at 21:54:03
So why would anyone fork out the dough for the latest and greatest processor if anyone could just buy a 4x 965 and be ok?

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April 4, 2011 at 22:18:23
what are you saying thet you dont need a graphics processor

no no no no NO
CPUs are meant to process programs and data i think and GPUs are meant to Render textures and polygons a CPU cant do a GPU's Job.

For more information go here:

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April 5, 2011 at 06:37:04

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April 5, 2011 at 07:59:02
Thanks Mickliq, pretty much gave me my answer. There's absolutely no reason to spend so much on a processor! That's what I figured but wanted clarification.

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April 5, 2011 at 08:43:02
oh and if you are buying a processor dont buy a phenom II x4 965 buy a phenom II x2 560 BE and unlock the two disabled cores using a mother board that supports core unlocking and then over clock it science it is a black edition you will save a lot of money this way

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April 5, 2011 at 09:28:38
I should add that only when you are talking about GAMING does the CPU not matter so much. Thats because games do heavy graphical rendering, not necessarily heavy threading and calculations (what a CPU does best).

If you are talking about other tasks, like media encoding or virtualization software... then, yes, the CPU most definitely does warrant a good CPU.

Though, honestly, CPU prices pale in comparison to high end GPU's. I can buy an i5-2500k, one of the best consumer CPU's in the world, with a decent motherboard for under $400. That will make all my tasks faster, even gaming (though the contribution wouldn't be as large as one from a better GPU).

The highest end GPU's can easily approach that cost. And they will only help you in one area: gaming.

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April 5, 2011 at 09:41:57
That's another sweet idea! I had no idea that was possible. However, does the cost of the motherboard that supports "core unlocking" make it cost as much, or more than just getting the processor in the first place?

Sorry, coming back from a deployment soon and can't wait to build a new system!

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April 5, 2011 at 09:45:13

Ok so then with one of the newer CPU's couple I will notice a more than 'marginal' difference than if I used a phenom II x4 965 or a phenom II x2 560 BE?

When I say more than marginal, I guess I mean > 10 FPS.

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April 5, 2011 at 10:53:49
It depends on the game, the settings, the number of displays to make a statement like that.

Check this out.

Thats an example of GPU bottleneck. That game (Bad Company 2) utilizes multi-core CPU technology. All 4 core and 6 core CPUs are performing the same FPS at max settings. If you were to have some godly GPU setup that maximized their performance, then you would see the CPU make a difference in FPS.

Thats an example of CPU bottleneck. The game (Far Cry 2) is not as graphically demanding, and so the CPU is able to contribute to FPS. Here, we see a difference in ~40 FPS from the X4 to the i5-2500k. If you were to have a terrible GPU that couldn't keep up with the game, your CPU choice would not influence your observed FPS.

Bear in mind, those results are from an i5-2500k at STOCK speed: 3.3 GHz. You can overclock that bad boy to 4.5 GHz with a stock fan. Asus/MSI motherboards will take you there with the push of a button- absolutely no BIOS tweaking needed. If you get your hands a little more dirty, you can easily get that CPU up to 4.8 GHz (some will be lucky enough to get a standout chip that can do over 5.0 GHz). You're talking over a 40% increase in clock speed performance.

If you want to go with AMD, you can spend your money on the X4 setup now... you will be able to upgrade to a Bulldozer CPU when its released, but then you're paying more (2 CPUs + 1 Mobo) vs Intel (1 CPU + 1 mobo). The Intel LGA 1155 socket might be around for another year or two, so you could also possibly upgrade on the Intel motherboard down the line.

If I were building a new build (which I am currently) I wouldn't consider using anything but Sandy Bridge (which I am using), unless budget absolutely couldn't be stretched and performance compromise was not an issue.

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