AMD Radeon RX 6900 XT Review

Introduction and Technical Specifications

AMD Radeon RX 6900 XT Review

Introduction

The last of the reviews I wrote which you should have read already but were lost when the server coughed it's guts up is the AMD Radeon RX 6900 XT. Thank you for bearing with us during what has been a difficult week and hopefully all the issues have been solved and we can get back to reviewing things on time instead of stuff we'd done a week ago. We love you all.

The Radeon RX 6800 absolutely blew our socks off, returning the Radeon brand name to the heights it has always deserved to be, but hasn't necessarily always been. One of our favourite cards ever was the HD 4850 because you could clock the hell out of it and get 4870 performance for a significantly lower investment. To see some of the GPUs they've released in the intervening years has been depressing to say the least. I know many of you believe we have a preference for one brand or the other here at OC3D but we're totally brand loyalty free. We want the best possible product at the lowest price, and we want all the manufacturers to push each other to make things work faster and be priced cheaper, regardless of who it is. We're on the consumers side.

With the success of the RX 6800 and 6800 XT we were hugely excited to see what performance AMD have squeezed from their new flagship card, the RX 6900 XT. With a significant price hike over the RX 6800 we're hoping for big things.

Technical Specifications

Now we're the first to admit that performance on paper is nearly meaningless. History has taught us that how good something looks isn't always representative of how it performs in the real world®. Nonetheless seeing how little extra heft the RX 6900 XT has when compared to its RX 6800 XT - for what is a fifty percent price hike - doesn't exactly fill us with excitement. But that's what our tests are for.

 Radeon RX 6800 XTRadeon RX 6900 XT
ArchitectureRDNA 2RDNA 2
Manufacturing Process7nm7nm
Transistor Count26.8 Billion26.8 Billion
Compute Units7280
Ray Accelerators7280
Stream Processors46085120
Game ClockUp to 2015 MHzUp to 2015 MHz
Boost ClockUp to 2250 MHzUp to 2250 MHz
Single Precision PerformanceUp to 20.74 TFLOPSUp to 23.04 TFLOPS
Half Precision PerformanceUp to 41.47 TFLOPSUp to 46.08 TFLOPS
Texture Fill RateUp to 648 GT/sUp to 720 GT/s
ROPs128128
Peak Pixel Fill RateUp to 288 GP/sUp to 288 GP/s
Infinity Cache128 MB128 MB
Memory16GB GDDR616GB GDDR6
Memory Bandwidth512 GB/s512 GB/s
Memory Interface256-bit256-bit
Board Power300W300W

Now to see them it the flesh..

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Most Recent Comments

16-12-2020, 05:17:59

Stoly
I really like how the 6800 series look.

They look like pro cards, no bells, whistles or blinky LEDs. Its been a while since I really liked an AMD reference card design.Quote

16-12-2020, 08:48:24

Dicehunter
Great review Tom !

Other people have said in their review that they think something is wrong on the driver and/or firmware side, A card with a fair chunk more under the hood should perform better, Not match a lower tier card or just slightly edge it out in certain titles, Unless RDNA2 really doesn't scale well like AMD said in the past and there are diminishing returns beyond a certain CU count.Quote

16-12-2020, 13:04:11

AngryGoldfish
Quote:
Originally Posted by Dicehunter View Post
Great review Tom !

Other people have said in their review that they think something is wrong on the driver and/or firmware side, A card with a fair chunk more under the hood should perform better, Not match a lower tier card or just slightly edge it out in certain titles, Unless RDNA2 really doesn't scale well like AMD said in the past and there are diminishing returns beyond a certain CU count.
There's diminishing returns for overclocks as well. Hitting 2.8Ghz is nice, but it only introduces a little extra performance.Quote

17-12-2020, 01:45:05

Kaapstad
Quote:
Originally Posted by AngryGoldfish View Post
There's diminishing returns for overclocks as well. Hitting 2.8Ghz is nice, but it only introduces a little extra performance.
When the Asus Strix 6900 XT LC turns up it will be a beast because of the AIO unit it comes with.

Overclocking works well providing you keep the thing cool, failing that it is a case of diminishing returns because of throttling.Quote

17-12-2020, 08:40:05

FTLN
Quote:
Originally Posted by Kaapstad View Post
When the Asus Strix 6900 XT LC turns up it will be a beast because of the AIO unit it comes with.

Overclocking works well providing you keep the thing cool, failing that it is a case of diminishing returns because of throttling.

Lets just hope the pump on it doent make a horrible whining noise like all the EVGA AIO cards..Quote
Reply
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