Sapphire Radeon HD 7790 Dual-X OC Reviewccokeman -
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Sapphire HD 7790 Dual-X OC Testing:
Testing of the Sapphire Dual-X HD 7790 OC will consist of running it and comparison cards through the OverclockersClub.com suite of games and synthetic benchmarks. This will test the performance against many popular competitors. Comparisons will be made to cards of a range of capabilities to show where each card falls on the performance ladder. The games used are some of today's newest and most popular titles, which should be able to provide an idea of how the cards perform relative to each other.
The system specifications will remain the same throughout the testing. No adjustments will be made to the respective control panels during the testing to approximate the performance the end user can expect with a stock driver installation. I will first test the cards at stock speeds, and then overclocked to see the effects of an increase in clock speed. The cards will be placed in order from highest to lowest performance in each graph to show where they fall by comparison. The NVIDIA comparison cards will be using the 314.21 beta drivers.The AMD-based cards will be using the Catalyst 13.1 drivers and latest CAP profile with the exception of the HD 7790 which will use the press evaluation driver.
- Processors: Core i7 2600K @ 4.4 GHz 100 x 44
- CPU Cooling: Corsair Hydro Series H100
- Motherboard: Gigabyte Z68AP-D3
- Memory: Mushkin 993997 9-11-10-28 (1866 MHz)
- Video Card: Sapphire HD 7790 Dual-X OC
- Power Supply: Corsair AX1200
- Hard Drive: Corsair Force GT 240GB
- Optical Drive: Lite-On Blu-Ray
- Case: Corsair Obsidian 650D
- OS: Windows 7 Professional 64-bit
Comparison Video Cards:
- NVIDIA GTX 650Ti
- ASUS GTX 660Ti DC II TOP
- Powercoler PCS+ HD 7870 Myst
- Sapphire HD 7950 OC
- ASUS GTX 660 DC II TOP
- Sapphire HD 7790 Dual-X OC:Core 1200Hz, Memory 1600MHz
Overclocking the Sapphire HD 7790 Dual-X OC was a little disappointing since I felt there was so much more in the Bonaire core. Voltage options are not an option with this card so you are left with the limits imposed by the VBIOS. The only option to improve the situation short of modding the card will be to increase the power control settings in whichever utility you choose to use. For this card from Sapphire we used its TriXX utility version 4.60. It proves to be as functional as some of the other utilities on the market.
As a factory overclocked card, the Dual-X HD 7790 already comes with clock speeds of 1075MHz on the core and 1600MHz on the GDDR5 memory. Pretty stout clock speeds right out of the gate. The TriXX utility had clock speed limits well in excess of the capabilities of the card, however it seems the VBIOS once again is the limiting factor here with the maximum possible clock speeds that can be attempted are 1200MHz on the Bonaire core and the as delivered 1600MHz on the memory. Setting the clock speeds above this level just returned the clock speeds back to the last level set below 1200/1600MHz. With those limits it took literally 30 seconds to find the maximum clock speeds possible with this card. Quick and easy but there has to be more there.
Maximum Clock Speeds:
Testing for the maximum clock speed consisted of looping Unigine 3.0 for 30 minutes each to see where the clock speeds failed when pushed. If the clock speed adjustment failed, then the clock speeds and tests were rerun until they passed a full hour of testing.
- Gaming Tests:
- Metro 2033
- Crysis 3
- Batman: Arkham City
- Battlefield 3
- Unigine Heaven Benchmark 4.0
- Unigine Valley 1.0
- Sid Meier's Civilization V
- DiRT 3
- Far Cry 3
- Power Consumption