Can you imagine playing the latest update of Fortnite with those shitty 2015 visuals? No gamer would trade the GPUs we have today with any released pre-COVID, at least, and major credit goes to the VRAMs.
A video RAM is a card that manages data to impact the visuals, performance, speed, and streaming quality. The latest standardised VRAM is the GDDR7, which is constantly being compared to the GDDR6, and for good reasons. There’s a special buzz in the gaming community asking which card is better.
It’s natural to assume that the latest version is the best, but that’s not always the case. So, let’s see if the GDDR7 is better or if it is GDDR6 giving its successor a run for the money.
What is GDDR6 Memory?
Launched in January 2018, the GDDR6 chip has been the lifeline of gaming PCs ever since. Compared to all versions released before, the Graphics DDR6 exclusively emphasised graphics processing, whereas the others focused on basic performance. It excelled in providing great visuals for that time without sucking in excessive energy.
Before the GDDR6, gaming had certain limitations, particularly in terms of speed and feature support. For high-resolution games of 4K, version-6 provided a lag-free experience with zero visual downgrades.
Moreover, version-6 was the first to support the RTX technology and basic AI rendering, which was considered revolutionary among gamers.
What is GDDR7 Memory?
The GDDR7 chip was launched in March 2024; the same year it was standardised for the upcoming NVIDIA GPUs. Its USP is the AI acceleration support that enables parallel computation and management of workloads. It manages all Tensor cores of a graphics processing unit to enhance machine learning.
Version-7 is designed to power the GPU at a blazing fast speed so that it provides high frame rates. It also substantially reduces the buffer time for 8K gaming, thanks to its data transmission efficiency. The most important feature of version-7 is its limited power consumption, which beats even the toughest of its predecessors.
Differences of GDDR6 and GDDR7 Memory
Features | GDDR6 | GDDR7 |
Data Transfer Rate | 16 GBps max | 32 GBps max |
Bandwidth (256-bit bus) | 576 GB/s | 1 TB/s |
Signalling | PAM2 | PAM3 |
Power Consumption | 1.35V | 1.2V |
Channel | Two (16 bits) | Four (8 bits) |
Data Transfer Rate
There’s a lot that goes into the visuals of your games, for example, textures, shadows, light, and reflections. Processing all these things requires frame data that is handled by all versions of GDDR, but at different rates. A high transfer rate means you get fast frame rendering and smooth gameplay without any buffering.
The Graphics DDR6 has a transfer rate of 16 GBps, whereas the GDDR7 has a higher rate of 32 GBps. This 100% increase in rate means the latter enables heavy-duty execution in a graphically intense environment. With more data flowing to the GPU during a short span, you experience better responsiveness in gaming with greater detail.
Signalling Technology
Both versions of GDDR use the Pulse Amplitude Modulation (PAM) technology for signal generation. The main benefit of PAM is that it enables more information to be transmitted per clock cycle. PAM signalling ensures that the full potential of the GPU is not hindered during gaming because of limited memory bandwidth.
The Graphics DDR6 uses PAM2 or NRZ (Non Return Zero) signalling, whereas GDDR7 uses PAM3 signalling. While PAM2 uses two voltage levels to encode and decode words to binary numbers and vice versa, PAM3 has three voltage levels.
Hence, in GDDR6 chips, 1 1-bit signal is transmitted during each clock cycle. On the other hand, Graphics DDR7 transmits 1.5 bits per clock cycle for ultra-fast gaming.
Design & Construction
The Graphics DDR6 chip has a compact design with a dual-channel architecture, allowing 16-bit data sets to flow through it. According to the design guide, the dielectric constant (area to store energy) is made of glass, resin, and mixed materials. It consumes 1.35V of energy to power the graphics processing unit for performing its tasks.
On the contrary, the manufacturers are loud and proud about the eco-friendly construction of the GDDR7. Not only is it compact, but the Epoxy Moulding Compound construction keeps the temperature of the GPU cool at all times. Partial credit for temperature regulation goes to the low power consumption of only up to 1.2V.
AI Performance
It is a universally accepted fact that AI is a game-changer in gaming. Not just in terms of voice and command recognition, AI is altering visuals, reconstructing images, and getting hands-on with the game while you’re playing it. But such responsive AI performance is restricted to the Graphics DDR7 only. Version-7 supports high-end AI-driven gaming with real-time AI rendering.
As for GDDR6, the AI features are not as upscale. Version-6 supports average AI functioning, like managing primary routine workloads. While yes, it supports machine learning, the deep-learning models are mostly small to medium-sized, with minimum real-time inference provided.
Bandwidth & Gaming Performance
The rule of thumb states that the VRAM bandwidth should be high enough to facilitate smooth frame rates. Achieving stutter-free frame rates is only achievable if you have speedy access to crucial game figures. Memory band is directly related to the data transfer speed of a GPU. It determines how fast information is transferred from the VRAM to the GPU after being read or written.
The Graphics DDR6 chip, with a 256-bit bus, can achieve an expected memory bandwidth of 576 GB/s. This bandwidth is ideal for 1080p-1440p gaming performance, and can even perform decently at 4K resolution. However, version-7 has a 1 TB/s band designed to support 8K resolution gaming.
Final Verdict - Which Version is Better?
With no exaggeration whatsoever, GDDR7 is the best for gaming. It’s an all-rounder, a powerhouse, a sneak peek into what the future GPUs have in store for the gaming community. The GDDR6 isn’t even a decent competition with the low transfer rate and bandwidth. Its power draw, which was seemingly perfect a few years back, now looks outrageous in front of the version-7.
If you want to experience supersonic speed, stutterless gaming, and realistic visuals with rich details, you know which VRAM to opt for. Version-7 will not disappoint you anytime soon.
