- Sometimes you don't realize what you're missing

until it's staring you in the face.

But when you notice it,

it's just ...

So sweet, isn't it?

Well, that's what we finally have here today with Nvidia,

the opportunity to have our cake and eat it too,

because they have finally enabled resizable bar

on their desktop GeForce GPUs.

Get it?

Resizable bar, extra sweetness?

(laughs)

In theory, this is a simple driver update

that will unlock extra performance

on your existing GPU.

Assuming you're lucky enough to own one.

But what we're gonna find out

is if it is truly something for nothing,

or if it's just an illusion.

(upbeat music)

I'll give you the segue

to our sponsor for nothing though,

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(upbeat music)

Resizable bar has been a big deal

ever since AMD announced their implementation

of the feature called smart access memory.

If you haven't been keeping up with all the buzz,

it basically allows a CPU

to access all of a PCI Express device's memory at once,

rather than in small, 256 megabyte chunks,

as has been the case until now.

Resizable bar has existed in the data center

for some time now,

but it couldn't find momentum on the desktop

until AMD kicked off this

scramble to implement it industry wide.

Which kind of raises the question.

Why now?

Well, in the early days of PCI Express,

it wasn't a problem for gamers,

because game assets, like textures,

were sized proportionally to the video frame buffers

of that time.

But with the complexity of today's games,

and with modern graphics cards

having as much as 24 gigabytes of onboard memory,

you can easily imagine a situation

where the CPU could waste a lot of cycles,

getting the data it needs,

if it can only address 256 megabytes at a time,

ultimately eliminating this waste

is where our performance boost comes from.

The only problem is that in order to support it,

every device in the chain needs to be capable.

The CPU, the motherboard, and the PCI Express device,

which, in this case is a GPU.

Now we've already looked at Nvidia's

preliminary implementation of resizable bar

on mobile GeForce GPUs, with an MSI GE76 Raider laptop.

And at the time we concluded that there was

more to the sometimes impressive performance improvements

that AMD was getting,

than just enabling resizable bar.

And we also concluded that Nvidia

had some work to do before it was ready for prime time.

But even with it fully cooked,

it's important to know that not every game

or application will benefit,

and how the driver handles memory management

appears to play a major role

in what kind of performance uplift,

or fall you can expect.

That's where Nvidia's latest drivers,

and the free chocolate come in.

Our previous investigation showed

that the impact differs depending on CPU performance.

So we grabbed both, a Ryzen 5 5600X

and a Ryzen 9 5900X

to represent the mid-range and the high end.

We'll be using a GeForce RTX 3080,

and for comparison against team red,

we've got a Radeon RX 6800 XT.

Something to note is that because we're focused

on their respective improvements,

over stock performance,

and not on completely re-reviewing these cards,

all of the results for both sides

will be in relative percentages.

At 1080p, things are already really interesting.

Shadow of the Tomb Raider doesn't change much,

but where Radeon loses some performance

in the 5% lows on Ryzen 9,

GeForce gains hinting that Nvidia

might be doing a better job

of reducing die to die latency,

on AMD's own CPU, than AMD's graphics team is.

GTA V on the other hand,

gives GeForce a hard time,

with Radeon gaining a bit with Ryzen 5,

which further hints that AMD's implementation

favors single die CPU's.

As for F1 2020,

this is one of Nvidia's call-outs for performance uplift

and it brings the first major victory for resizable bar.

We ended up with slightly higher average frame times

across the board for team green, which is bad,

but significantly lower, 1% minimum frame times

that reach toward a 10% improvement on the 5,900 X.

That's good because in almost any game

improving performance during challenging scenes

is way more important

than that when animations are already smooth.

This is especially true in competitive titles

when performance tends to fall

in the heat of battle

because of all the character models and effects

that are on screen.

Again, Nvidia seems to be taking better advantage

of the extra course on the Ryzen 9.

Forza Horizon 4 is another call-out

and another win for Nvidia.

Although the pattern flips here,

with the Ryzen 5 pulling better improvements

across the board than the Ryzen 9.

This suggests that memory access patterns

play a significant role

in whether the die arrangement causes issues.

Radeon on the other hand struggles,

especially with the Ryzen 9,

where minimum frame rates are as much as 6% lower

then with resizable bar disabled,

which brings us back to our chocolate analogy, doesn't it?

It's perhaps unsurprising

that there's little change on Flight Sim 2020,

given how CPU-bound that game,

but Invidia does manage to eek out a slight improvement

with Ryzen 5,

while Radeon manages a bit better frame rates on Ryzen 9.

And Assassin's Creed Valhalla was the call-out title

that we found improvements for in our previous video,

and that continues today.

Nvidia pulls a respectable six to 9% improvement

across the board,

but then again that pales in comparison to team red,

pulling way ahead of stock with up to

18% higher performance.

Given the way that both teams are going back and forth here,

it seems like additional optimizations can still be made

for resizable bar on both sides, which is really promising.

Finally, CS GO, it's an older title

that already runs well on hardware of this caliber,

but we still manage to see a slight improvement

in minimum frame rates,

at the cost of some average FPS,

which is a price that most players should be willing to pay

for the reasons that I outlined before.

There is no price, by the way

for the new sticker packs that lttstore.com,

free with every order, checkmate Nvidia.

Moving on to 1440P.

You might not expect things to get better here,

but you'd be wrong.

While GeForce stays more or less the same

in Shadow of The Tomb Raider,

Radeon pulls two to 4% ahead with Ryzen 5,

and where GeForce loses in minimum frame rates

for no gain on Ryzen 9,

Radeon manages to gain about as many average frames

as it loses in minimums,

which in a non-competitive title like this one

might be an okay trade-off.

GTA V is a bit all over the place, with Ryzen 5,