Sapphire Radeon HD 7790 2GB OC Reviewccokeman -
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Sapphire HD 7790 2GB OC Testing:
Testing of Sapphire's HD 7790 OC equipped with 2GB of GDDR5 memory 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, including the GTX 650Ti Boost, will be using the 314.21 beta drivers. 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 release 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 2GB 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
- PowerColor PCS+ HD 7870 Myst
- Sapphire HD 7950 OC
- ASUS GTX 660 DC II TOP
- Sapphire HD 7790 Dual-X OC
- Powercolor HD 7850 PCS+
- XFX HD 7790 Black Edition Overclocked
- Sapphire HD 7790 2GB OC: Core 1240MHz, Memory 1640MHz
Overclocking on the Sapphire HD 7790 2GB OC proved a bit more fruitful than on the HD 7790 Dual-X just because some of the popular overclocking utilities have been updated to get that last little bit of clock speed out of the card. I saw that with the last HD 7790 I looked at that reached 1251MHz on the core and 1700MHz on the memory. Sapphire's HD 7790 2GB OC did not go quite that high but still was able to pull a 190MHz bump over the factory 1050MHz and was a bit stingy on the memory that already was clocked pretty close to its limits with just a 40MHz boost over the as delivered 1600MHz.
Even with that being said the HD 7790 2GB OC is one of the higher clocking cards in the comparison charts. Reaching these clock speeds did not require a boost to the power tune settings to reach the final clock speeds. If anything it impacted stability when used. Running the fan at 100% during the overclock testing allowed the card and components to stay cool, maximizing the overclock with a maximum temperature of 49 °C recorded. I usually like to use the utilities each manufacturer builds for its cards, but Sapphire TriXX is running a little behind on getting full functionality for the HD 7790 cards. I still ran into clock limits when setting the clock speeds, although I could set them in another utility and have them display correctly in TriXX. This is something that when fixed will once again make it the go to for Sapphire cards.
Maximum Clock Speeds:
Testing for the maximum clock speed consisted of looping Unigine Heaven 4.0 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