amazon HD 6790 reviews
HD 6790 is actually the 2nd cut of RV870 (Bart) is used on mid-range graphics card HD 6850 and HD 6870. Accordingly, the chip Bart full with 14 SIMD engine – where each SIMD engine contains 4 texture units (units so the surface) and 16 stream processors (stream processors). Each stream processor contains 5 stream cores (or shader cores).
With the HD 6790, with 4 SIMD engines disabled – results GPU only 40 texture units and 800 stream cores. Also, the cut also only equipped with 16 ROP (graphics pipeline command) compared with 32 of the HD 6800. Refined attention a little bit, we can see the HD 6790 is very similar to the HD 5770 in numbers : we have 40 texture units, 16 ROPs and 800 stream cores. In addition, the HD 6790 core clock / memory respectively 840/1050 MHz – also nearly identical to the HD 5770 850/1200 MHz.
However, the HD 6790 has the width to 256-bit memory – double the predecessor. In terms of parameters, it seems the HD 6790 is simply a version of the 256-bit HD 5770. Of course, the chip card will inherit Bart add some architectural advantages of the HD 6800 line as processing performance higher tessellation, Eyefinity (multi-screen technology from AMD) better or the ability to show 3D Blu-ray via HDMI Video smooth …
After the last point about the specs, let’s compare the direct representatives present in the current midrange segment:
Surely 256-bit memory width will bring much improved performance in 1 some cases, especially when anti-aliasing enabled. Based on the above parameters, can make predictions on cards will be stronger than the predecessor HD 5770 and HD 6850. senior weaker So the question here is: compared to rivals from Nvidia, HD 6790 will show how?
We all know the GTX 550 Ti launched can not beat the HD 5770, HD 6790 should certainly not against this opponent. Chances are targeting AMD’s purpose that the GTX 460 768MB blanks (end lifecycle preparation) is about to leave.
In fact, the HD 6790 and GTX 460 768MB are all the cuts of 2 seniors powerful par HD 6850 and GTX 460 1GB, but the way they are cut are different. GTX 460 768MB If lost 1/3 of ROP is reduced and breadth than the 1GB memory while retaining sufficient core shaders, texture units and core clock; the HD 6790 is cut off 1/2 of the ROP, a few (dozen) shader cores and texture units, but is running at a higher overclock.
HD 6790 will hopefully afford GTX 460 768MB replaced – because if not it will be a huge disadvantage for gamers in popular midrange segment.
HD 6790
AMD introduced the card by about 10.25 inches in length and 4.25 inches tall – exactly the measurements of previous HD 6870. Surely it had to use the old motherboard to manufacture prototype. Most likely the products of AMD’s partners will have to redesign the smaller size.
The card is designed to 2 head-end 6-pin while power consumption norms range only 150W (1 fit the capabilities of the first level and a 6-pin PCIe slot). Maybe this is a hint of the possibility of overclocking AMD’s HD 6790 reasonable? Consumers owning normal power supply is probably no need to worry about this, since there are a few versions of the 1 head 6-pin by the partners of AMD offer.
Test configuration & setup
In addition to the main characters, 5 different graphics card appears in the article to compare and assess the relative strength of the HD 6790, HD 5770, HD 6850, GTS 450, GTX 550 Ti and GTX 460 768MB.
where can you get a HD 6790 online
XFX AMD Radeon HD679XZRFC HD 6790 840M 1GB DDR5 DP HDMI DUAL DVI PCI-E: Buy it now
HIS Radeon HD 6790 1 GB GDDR5 Eyefinity DisplayPort DVI (HDCP) HDMI PCIe X16 2.1 Video Card (H679F1GD): Buy it now
The theory test
The opening is 3DMark 11 – always present in every review:
Not unexpected, the new card has performance somewhere between HD 5770 and HD 6850, even scores are very close to the more powerful card.
The Nvidia graphics card does not perform well in this test. GTX 550 Ti actually a bit stronger than the HD 5770 but with inferior scores in 3DMark 11. Similarly, the HD 6790 768MB and pass GTX 460 – offer hope for equivalent performance.
Unigine Heaven is the assessment tests capable of handling the most accurate current tessellation and often favors the Nvidia graphics card. Anyway, HD 6790 and HD 6850 followed quite closely.
Ability antialiasing
Results are not unexpected, the advantage of the memory capacity and memory width proved very effective when the resolution and antialiasing increases.
Overclocking – CrossFire performance
As we mentioned at the beginning of the article, but had itself HD 6790 available high pulse rate but it seems AMD is still implicit suggestions about overclocking capabilities of the card. In Overdrive software, AMD enables the card reached the maximum pulse 1000/1300 MHz. Practical level impulses may be achieved when the voltage increases, but we decided to just squeeze the card running at 925/1200 MHz – the maximum level without increasing power.
Because only in the HD 6790 sample hand 1, CrossFire performance tests were conducted by paired with HD 6950. AMD CrossFire performance confirmed in this case will be limited by the weaker cards. So we do not need to worry about the accuracy of the test.
Really shocked! CrossFire performance to increase by more than 90% compared to single-card run! Nvidia’s GTX 550 Ti absolutely no chance any compare.
In addition, the performance of the card after overclocked follow closely brother HD 6850 – very happy news for gamers midrange.
Power consumption – Temperature – Noise
After the performance, the HD 6790 is not clear to us yet another pleasant surprise not:
Also somewhat surprising (but not in a good direction): HD 6790 back “take” more power stronger than the HD 6850. In addition to higher default clock, can re-use of HD 6870 cards is also a factor. Very likely the redesign comes from AMD’s partners will improve the power consumption of the card.
However, the HD 6790 still consume less power than GTX 460 768MB.
It can be said, though the use of cage design, the radiator fan of the standard provided by AMD still operate satisfactory.
In terms of numbers, the noise level seems a bit higher than normal. The reason is that we make measurements of the card at a distance of only 1 inch to obtain the most accurate results about the difference between them. With results like this, we absolutely do not need to worry about noise when the HD 6790 in the chassis.
Summary
1680 x 1050 resolution is mainly that the mid-range graphics cards targeting. So we will make a summary in this resolution to give a final assessment, taking GTS 450 makes mark 100%.
Ironically for Nvidia: graphics worthy successor to the follower for GTX 768MB not GTX 550 Ti ! Indeed, after the launch phase shortened quick hit and then, we could not believe the HD 6790 can do so much. Silently develop and appear scupper – seems again mastered AMD midrange segment.
Reason: The series of tests we have … a little too much game in favor of AMD. So there is not much reason to hesitate if you are looking to own a famous Fermi card.