Thursday, June 25, 2009

The curious case of the CPU bottleneck

People who bought machines way back in 2005 would probably have an Intel P4 or AMD Athlon 64 single core processor on their hands. Such people, like myself, would sometimes like to play games (yeah, right... sometimes...)

The price of upgrading to a new processor (a dual/tri/quad machine) is amplified by the fact that a CPU upgrade entails a motherboard and RAM upgrade in most cases (unless you are lucky enough to be stuck with the LGA775).

On the other hand, upgrading to a better graphics card is terribly cheap these days. Take a look at these prices (May 2009, Bangalore):
CardPrice in Rupees
ATI HD4670 5000
Geforce 9800 GT6500
ATI HD4770 8000
Geforce GTS 2508500


Another option is to upgrade the CPU, the motherboard and RAM. Lets look at a reasonable configuration
ComponentPrice in Rupees
Intel E7400 (2.8 Ghz Dual Core)6500
Intel Q8200 (2.33 Ghz Quad Core)8500
Cheap Motherboard4000
4 GB of DDR2 800 RAM2600


So, no matter how you swing, your pockets will get lighter by around 12-15k for the entire deal.

I am one of those weirdos who has a Single Core 1.8 Ghz CPU with 1 GB DDR RAM, and a grossly overpowered (for this setup) Geforce 9800GT 512MB. Why? I went with option 1... buy a GPU, leave the rest as it was 3 years ago.
Earlier, I had a Geforce 6800 GS, which was by no means a bad card 3 years ago...

Now that the stage is set, this article will tell you the true story behind the CPU bottleneck in games. How bad is it really, to have a crappy CPU coupled with a reasonably fast GPU? How much difference does the RAM make? These are things you will never see in regular GPU benchmarks, because they use a Core i7 (3 ghz) with 8 GB of 1600 MHz DDR3 RAM... crazy.

These numbers that I will be reporting are not in the true sense a benchmark, they are just a bunch of readings. I dont really have comparision data in most cases. Maybe I will put in some numbers from my friend, who has a Pentium 4 Dual Core rig with a 8800GS.

Watch this space for actual results over the next few days...

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