Originally Posted by aerotracks
So. Took me a while to do the benchmarking, but results are worth it I hope.
First of all, I used the settings I normally would for gaming. That means 1440p, details cranked up to the max and MSAA 8x. No 800x600 stupidity. Race Track: New Union Trans America Pacers - California Race (4.6km) - driving the Mustang Mach 1 Twister Special.
I debated whether or not to overclock my 290s - but heavily overclocking the processor and not touching graphics is not realistic. I ended up choosing 1100/1375 to represent a regular stable overclock without overvolting.
OC Settings with Timing Configurator:
Warning: Spoiler! (Click to show)
A couple things are notable:
With one card, Grid2 is GPU bound at 1440p max settings and 8x MSAA. Results with different CPU settings are within the margin of error. With an overclock of just 4200 you are good to go.
The picture changes completely when turning on CrossFire. When using two cards, the single most important thing to get more fps out of your G3258 is overclocking your memory
. Hard to believe, mem speed is more important than cranking up your core from 4.2 to 4.7! Your uncore speed also has some importance, so don't neglect that either.
If you are on a lower resolution and/or using lower graphics settings, it wouldn't surprise me that you are seeing this phenomenon with a single card too.
Now without further due, the results. Enjoy
You not only tested the effect of CPU core OC but also the RAM OC and CPU uncore OC. For GRID 2, looks like higher CPU speeds won't help when you only have 2 CPU cores
I asked for those benchmarks coz from my own testing with my Palit GTX 750 Ti StormX Dual, there is no difference between 4.0 GHz and 4.3 GHz. There is only a small improvement going from 3.2 GHz to 4.0 GHz. I used a legit copy of Metro: Last Light for benchmarking (built-in benchmark tool)
My G3258 chip is limited to 4.3 GHz @ 1.325 Vcore that is why I can't test CPU core speeds up to 4.5 GHz. Based on my results, I just decided to run it at 4.2 GHz @ 1.275 Vcore
By the way, for the single R9 290, are the results also the average of 3 runs ?
If you have time, can you try those runs for Hitman: Absolution or Metro: Last Light ? Thanks
I hope other could also share their game benchmarks testing the difference between 4.2 GHz and 4.5+ GHzEdited by TPCbench - 9/29/14 at 6:55pm