Radeon HD 7790 review -
Overclocking the graphics card
Overclocking the graphics card
As most of you know, with most video cards you can apply a simple series of tricks to boost the overall performance a little. Typically you can tweak on core clock frequencies and voltages.
What do we need?
One of the best tools for overclocking NVIDIA and ATI videocards is our own AfterBurner which will work with 90% of the graphics cards out there. We can really recommend it, download here.
Where should we go?
Overclocking: By increasing the frequency of the videocard's memory and GPU, we can make the videocard increase its calculation clock cycles per second. It sounds hard, but it really can be done in less than a few minutes. I always tend to recommend to novice users and beginners, to not increase the frequency any higher than 5% on the core and memory clock. Example: If your card runs at 600 MHz (which is pretty common these days) then I suggest that you don't increase the frequency any higher than 30 to 50 MHz.
More advanced users push the frequency often way higher. Usually when your 3D graphics start to show artifacts such as white dots ("snow"), you should back down 10-15 MHz and leave it at that. Usually when you are overclocking too hard, it'll start to show artifacts, empty polygons or it will even freeze. Carefully find that limit and then back down at least 20 MHz from the moment you notice an artifact. Look carefully and observe well. I really wouldn't know why you need to overclock today's tested card anyway, but we'll still show it.
All in all... do it at your own risk.
|Core Clock: 1000MHz||Core Clock: 1075MHz||Core Clock: 1200MHz|
|Boost Clock: 1000MHz||Boost Clock: 1075MHz||Boost Clock: 1200MHz|
|Memory Clock: 6000MHz||Memory Clock: 6400MHz||Memory Clock:6400MHz|
The Sapphire R7790 is really fun to tweak and play with and you will not be disappointed by the results. Coming from a reference 1000 MHz, to 1075 MHz factory overclocked is already nice. The reality is that we had it running stable at 1200 MHz with just a few tweaks:
You can use any tweak utility of preference of course, I'm just very handy with AfterBurner hence I use it all the time. But here's what you need to do:
- Increase power limiter to 120%
- Unfortunatekly we had no voltage control
- Increase core clock frequency to 1200 MHz
- You can leave the fan at default fan RPM
- Memory could not be clocked higher
Above, Sleeping Dogs, same maxed out image quality settings as before yet now with added overclock results. DX11 High Quality mode in-game AA enabled in-game AF enabled. As you can see that's free extra performance.
Above, 3DMark 11. There is an additional bump in this fairly GPU limited software. The interesting thing is that once overclocked this 139 EUR card would perform roughly at R7850 performance.
And here's Aliens vs Predator, which was showing a smaller performance increase. Likely the power boost function kicked in and the game then reached its maximum TDP (and lowered the clock frequency to match the desired power signature).
We test and review the PowerColor Radeon HD 7850 SCS3 today. This stock clocked Radeon HD 7850 is cooled passively, meaning it has no fans tool it down. That also means it's rather silent as it does not make any noise. But what about temperatures then you must be wondering ?
Gigabyte Radeon HD 7790 2GB OC review
We test and review the Gigabyte Radeon HD 7790 2GB OC edition, also known under SKU code GV-R7790OC-2GD. We benchmark the product incl FCAT Frametimes. The new graphics card is intended to boost a little more performance into entry-level gaming. The Gigabyte HD7790 OC 2GB clocks in at 1075 MHz on the boost engine, packed with totally silent custom cooling.
MSI Radeon HD 7790 TurboDuo OC review
We test and review the MSI Radeon HD 7790 OC edition, also known under SKU code R7790-1GD5-OC incl FCAT Frametimes. The new graphics card is intended to boost a little more performance into entry-level gaming.
Radeon HD 7990 review
We review the new AMD Radeon HD 7990 including FCAT frametime measurements. The dual GPU product that you guys learned to know under codename Malta finally is released. AMD it doing it in style, two fully equipped Tahiti XT2 GPUs versus good yet silent cooling. In this review we'll look at the product, the architecture, the benchmarks, including frametime based FCAT measurements. Head on over towards our AMD Radeon HD 7990.