Iris Plus Graphics 645 vs Radeon R9 390

Place in the ranking	245	666
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	11.65	no data
Power efficiency	5.79	20.47
Architecture	GCN 2.0 (2013−2017)	Generation 9.5 (2016−2020)
GPU code name	Grenada	Coffee Lake GT3e
Market segment	Desktop	Laptop
Design	reference	no data
Release date	18 June 2015 (9 years ago)	7 October 2019 (5 years ago)
Launch price (MSRP)	$329	no data

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

no data

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	2560	384
Core clock speed	no data	300 MHz
Boost clock speed	1000 MHz	1050 MHz
Number of transistors	6,200 million	no data
Manufacturing process technology	28 nm	14 nm+++
Power consumption (TDP)	275 Watt	15 Watt
Texture fill rate	160.0	50.40
Floating-point processing power	5.12 TFLOPS	0.8064 TFLOPS
ROPs	64	6
TMUs	160	48

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Bus support	PCIe 3.0	no data
Interface	PCIe 3.0 x16	Ring Bus
Length	275 mm	no data
Width	2-slot	no data
Supplementary power connectors	1 x 6-pin, 1 x 8-pin	no data
Bridgeless CrossFire	+	-

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory type	GDDR5	System Shared
High bandwidth memory (HBM)	-	no data
Maximum RAM amount	0 MB	System Shared
Memory bus width	512 Bit	System Shared
Memory clock speed	1000 MHz	System Shared
Memory bandwidth	384 GB/s	no data
Shared memory	-	+

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display Connectors	2x DVI, 1x HDMI, 1x DisplayPort	Portable Device Dependent
Eyefinity	+	-
Number of Eyefinity displays	6	no data
HDMI	+	-
DisplayPort support	+	-

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

CrossFire	+	-
FreeSync	+	-
PowerTune	+	-
TrueAudio	+	-
VCE	+	-
DDMA audio	+	no data
Quick Sync	no data	+

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX	DirectX® 12	12 (12_1)
Shader Model	6.3	6.4
OpenGL	4.6	4.6
OpenCL	2.0	3.0
Vulkan	+	1.3
Mantle	+	-

Synthetic benchmark performance

Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.

Combined synthetic benchmark score

This is our combined benchmark score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

R9 390 23.15
+419%

Iris Plus Graphics 645 4.46

Passmark

This is the most ubiquitous GPU benchmark. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.

R9 390 8901
+419%

Iris Plus Graphics 645 1716

3DMark Fire Strike Graphics

Fire Strike is a DirectX 11 benchmark for gaming PCs. It features two separate tests displaying a fight between a humanoid and a fiery creature made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic graphics and is quite taxing on hardware.

R9 390 12730
+572%

Iris Plus Graphics 645 1893

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Average FPS across all PC games

Here are the average frames per second in a large set of popular games across different resolutions:

Full HD

120−130
+380%

−380%

Cost per frame, $

1080p

2.74

no data

FPS performance in popular games

Full HD
Low Preset

Counter-Strike 2	12−14 +0%	12−14 +0%
Cyberpunk 2077	9−10 +0%	9−10 +0%
Elden Ring	10−11 +0%	10−11 +0%

Full HD
Medium Preset

Battlefield 5	12−14 +0%	12−14 +0%
Counter-Strike 2	12−14 +0%	12−14 +0%
Cyberpunk 2077	9−10 +0%	9−10 +0%
Forza Horizon 4	18−20 +0%	18−20 +0%
Metro Exodus	10−11 +0%	10−11 +0%
Red Dead Redemption 2	14−16 +0%	14−16 +0%
Valorant	9−10 +0%	9−10 +0%

Full HD
High Preset

Battlefield 5	12−14 +0%	12−14 +0%
Counter-Strike 2	12−14 +0%	12−14 +0%
Cyberpunk 2077	9−10 +0%	9−10 +0%
Dota 2	10 +0%	10 +0%
Elden Ring	10−11 +0%	10−11 +0%
Far Cry 5	23 +0%	23 +0%
Fortnite	24−27 +0%	24−27 +0%
Forza Horizon 4	18−20 +0%	18−20 +0%
Grand Theft Auto V	14−16 +0%	14−16 +0%
Metro Exodus	10−11 +0%	10−11 +0%
PLAYERUNKNOWN'S BATTLEGROUNDS	35−40 +0%	35−40 +0%
Red Dead Redemption 2	14−16 +0%	14−16 +0%
The Witcher 3: Wild Hunt	14−16 +0%	14−16 +0%
Valorant	9−10 +0%	9−10 +0%
World of Tanks	70−75 +0%	70−75 +0%

Full HD
Ultra Preset

Battlefield 5	12−14 +0%	12−14 +0%
Counter-Strike 2	12−14 +0%	12−14 +0%
Cyberpunk 2077	9−10 +0%	9−10 +0%
Dota 2	27 +0%	27 +0%
Far Cry 5	21−24 +0%	21−24 +0%
Forza Horizon 4	18−20 +0%	18−20 +0%
PLAYERUNKNOWN'S BATTLEGROUNDS	35−40 +0%	35−40 +0%
Valorant	9−10 +0%	9−10 +0%

1440p
High Preset

Dota 2	3−4 +0%	3−4 +0%
Elden Ring	5−6 +0%	5−6 +0%
Grand Theft Auto V	3−4 +0%	3−4 +0%
PLAYERUNKNOWN'S BATTLEGROUNDS	30−33 +0%	30−33 +0%
Red Dead Redemption 2	3−4 +0%	3−4 +0%
World of Tanks	30−35 +0%	30−35 +0%

1440p
Ultra Preset

Battlefield 5	6−7 +0%	6−7 +0%
Counter-Strike 2	9−10 +0%	9−10 +0%
Cyberpunk 2077	4−5 +0%	4−5 +0%
Far Cry 5	10−11 +0%	10−11 +0%
Forza Horizon 4	5−6 +0%	5−6 +0%
Metro Exodus	2−3 +0%	2−3 +0%
The Witcher 3: Wild Hunt	6−7 +0%	6−7 +0%
Valorant	12−14 +0%	12−14 +0%

4K
High Preset

Dota 2	16−18 +0%	16−18 +0%
Elden Ring	2−3 +0%	2−3 +0%
Grand Theft Auto V	16−18 +0%	16−18 +0%
Metro Exodus	0−1	0−1
PLAYERUNKNOWN'S BATTLEGROUNDS	12−14 +0%	12−14 +0%
Red Dead Redemption 2	3−4 +0%	3−4 +0%
The Witcher 3: Wild Hunt	16−18 +0%	16−18 +0%

4K
Ultra Preset

Battlefield 5	4−5 +0%	4−5 +0%
Cyberpunk 2077	1−2 +0%	1−2 +0%
Dota 2	16−18 +0%	16−18 +0%
Far Cry 5	5−6 +0%	5−6 +0%
Fortnite	3−4 +0%	3−4 +0%
Forza Horizon 4	3−4 +0%	3−4 +0%
Valorant	4−5 +0%	4−5 +0%

This is how R9 390 and Iris Plus Graphics 645 compete in popular games:

R9 390 is 380% faster in 1080p

All in all, in popular games:

there's a draw in 60 tests (100%)

Pros & cons summary

Performance score	23.15	4.46
Recency	18 June 2015	7 October 2019
Chip lithography	28 nm	14 nm
Power consumption (TDP)	275 Watt	15 Watt

R9 390 has a 419.1% higher aggregate performance score.

Iris Plus Graphics 645, on the other hand, has an age advantage of 4 years, a 100% more advanced lithography process, and 1733.3% lower power consumption.

The Radeon R9 390 is our recommended choice as it beats the Iris Plus Graphics 645 in performance tests.

Be aware that Radeon R9 390 is a desktop card while Iris Plus Graphics 645 is a notebook one.

Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.