AMD Radeon RX 6900 XT Review

Test Setup and Clock Speeds

AMD Radeon RX 6900 XT Review

Test Setup

We're still using our revamped test rig for the Radeon testing. We know that some of the more nit-picky of you might wonder why we're not also using the 5000 series Ryzen CPUs to make the most of the Rage mode, but Rage mode works on the Ryzen 9 3950X just fine, and we want to be able to compare like for like as always, and the 3950X is what we've tested everything else in our graphs on. Given that most people don't run CPUs as powerful as this, putting an even more powerful one in won't teach us anything nor help you in your decision making.

AMD Radeon RX 6900 XT
AMD Ryzen 9 3950X
ASUS ROG Crosshair VIII Formula
Corsair Dominator Platinum RGB Series DDR4 3600MHz
Corsair RM1000i PSU
Corsair iCUE H150i RGB Pro XT AIO
Corsair MP600 2TB PCIe 4.0 SSD
Corsiar Obsidian 500D RGB SE
Windows 10 x64 "May 2020" Update

Clock Speeds

Strangely the RX 6900 XT seems to prefer a little reduction in the voltage when you're overclocking it. Whether for yield reasons AMD have been a bit over-generous with the voltage, or we just got a golden GPU in the silicon lottery, but ours could be undervolted a fair way and still managed to push 2485 MHz peak boost and 2343 MHz average boost. Blimey Charlie.

AMD Radeon RX 6900 XT Review  

AMD Radeon RX 6900 XT Review  

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Most Recent Comments

16-12-2020, 00:17:59

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, 03:48:24

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, 08:04:11

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

16-12-2020, 20:45:05

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, 03:40:05

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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