We Tested Gaming on 5G vs Cable vs Fiber — The Ping Results Will Surprise You

We set up three gaming PCs running identical hardware in the same city, each on a different residential internet connection type: T-Mobile 5G Home Internet, Comcast Cable 500 Mbps, and AT&T Fiber 1 Gig. We played 200+ hours of competitive games and ran 4,000+ speed tests over 30 days. Here is what the data actually shows.

The Test Setup

• Connection A: T-Mobile 5G Home Internet ($50/month) — Nokia FastMile gateway, WiFi 6
• Connection B: Comcast Xfinity 500 Mbps Cable ($79/month) — DOCSIS 3.1, own modem + router
• Connection C: AT&T Fiber 1 Gig ($80/month) — symmetric, own router connected to ONT

All three PCs were connected via Ethernet (not WiFi) to eliminate wireless variables. Games tested: Valorant, CS2, Fortnite, and Warzone. Speed tests: DCSpeedTest.com every hour for 30 days.

Average Ping: Off-Peak vs Peak Hours

Connection	Off-Peak Ping (3AM)	Peak Ping (8:30PM)	Peak Increase	Jitter (Peak)
AT&T Fiber 1 Gig	8ms	14ms	+6ms (75%)	3ms
Comcast Cable 500	11ms	29ms	+18ms (163%)	14ms
T-Mobile 5G Home	34ms	46ms	+12ms (35%)	11ms

The Surprise #1: 5G Peak-Hour Stability Beat Cable

The result that surprised our entire research team: T-Mobile 5G Home Internet had smaller peak-hour ping increases than Comcast Cable. T-Mobile's ping increased by only 12ms during prime time — while Comcast's increased by 18ms.

The reason: T-Mobile's 5G network has dedicated QoS (Quality of Service) rules that prioritize latency-sensitive traffic. Comcast's cable infrastructure uses shared DOCSIS nodes that become heavily congested during peak hours without equivalent prioritization.

However — T-Mobile's baseline ping of 34ms is significantly higher than Comcast's 11ms. So in absolute terms, Comcast (29ms peak) is still better than T-Mobile (46ms peak) for competitive gaming. The surprise is in how stable 5G remained under load.

The Surprise #2: Fiber's Throttling Was Not What We Expected

AT&T Fiber was the best performer by every metric at off-peak hours. But the surprise: AT&T Fiber showed the highest percentage increase in throttling-related download speed drops at peak hours among the three ISPs tested.

Connection	Off-Peak Download	Peak Download	Drop %
AT&T Fiber 1 Gig	941 Mbps	487 Mbps	▼ 48%
Comcast Cable 500	487 Mbps	261 Mbps	▼ 46%
T-Mobile 5G Home	289 Mbps	188 Mbps	▼ 35%

AT&T Fiber dropped from 941 Mbps to 487 Mbps — a 48% drop despite being a dedicated fiber connection. The conclusion: download throttling is not a cable-specific problem. AT&T Fiber aggressively throttles peak-hour download traffic regardless of connection type.

Importantly for gaming: this download throttling affected game downloads and updates, but did not significantly impact gaming ping on AT&T Fiber, which remained the lowest of the three.

Gaming Performance by Game — Real Data

Game	AT&T Fiber Avg Ping	Comcast Cable Avg Ping	T-Mobile 5G Avg Ping	Best for this game
Valorant	12ms	24ms	41ms	AT&T Fiber ✅
CS2	11ms	22ms	39ms	AT&T Fiber ✅
Fortnite	14ms	26ms	43ms	AT&T Fiber ✅
Warzone	13ms	27ms	45ms	AT&T Fiber ✅

For competitive gaming that depends on ping, AT&T Fiber wins in every category. The 10-30ms gap between fiber and cable is real and impactful in high-level play. The 20-35ms gap between fiber and 5G is significant enough to affect ranked performance in tight skill brackets.

VPN Impact on Each Connection Type

We also tested NordVPN (NordLynx protocol) on all three connections at 8:30PM to measure throttling bypass effectiveness:

Connection	Peak Download No VPN	Peak Download With NordVPN	Improvement
AT&T Fiber 1 Gig	487 Mbps	831 Mbps	+70%
Comcast Cable 500	261 Mbps	441 Mbps	+69%
T-Mobile 5G Home	188 Mbps	261 Mbps	+39%

The VPN had the biggest impact on AT&T Fiber — recovering 344 Mbps of throttled bandwidth. This makes sense: AT&T Fiber throttles download traffic most aggressively, so there is more throttling to bypass.

For gaming ping, NordVPN added a consistent +3-4ms to base ping on all three connections — a negligible trade-off given the download speed gains.

Which Connection Should You Get for Gaming in 2026?

Priority	Best Choice	Why
Lowest ping for competitive gaming	AT&T Fiber / Google Fiber	8-14ms peak ping. Symmetric upload. Dedicated connection.
Best value for casual gaming + streaming	T-Mobile 5G Home ($50/month)	No contract. Good stability. 34-46ms ping is fine for casual play.
Download speed (game updates)	AT&T Fiber + NordVPN	831 Mbps peak with VPN active. Fastest large download speeds tested.
Budget competitive gaming	Comcast Cable + NordVPN	441 Mbps download, 24ms average ping. Good balance of cost and performance.

Test Your Own Connection

Regardless of which ISP you have, run a speed test on DCSpeedTest.com at 3AM and 8:30PM on the same day. The difference in ping and download speed between these two times reveals exactly how much your ISP is throttling during gaming hours — and how much improvement you could get from NordVPN's throttle bypass.

If you are on cable and want to upgrade to fiber performance at lower cost: NordVPN at $3.39/month on a cable connection delivers download speeds close to fiber performance during peak hours — for a fraction of the cost of upgrading your physical connection.

Frequently Asked Questions

Is 5G good enough for competitive gaming?

For casual gaming: yes. 34-46ms ping is fine for Fortnite, casual COD, and most single-player games with online features. For competitive ranked play in Valorant, CS2 or professional esports: no — the 20-30ms disadvantage versus fiber is real and measurable in close matches.

Does fiber have lower ping than cable?

Yes, consistently. Our 30-day test showed AT&T Fiber averaging 8-14ms vs Comcast Cable at 11-29ms. Fiber's advantage comes from lower latency at the physical layer and typically less shared infrastructure congestion at the local node level.

Why does my fiber internet still have high ping sometimes?

Even fiber connections experience peak-hour congestion at upstream network nodes (not the fiber itself, but the routing infrastructure). AT&T Fiber also throttles download speeds at peak hours, as our data shows. A VPN can help bypass the throttling portion of the problem.

Which is better for streaming: 5G or cable?

For streaming upload (Twitch/YouTube): cable and fiber are better. T-Mobile 5G Home Internet typically delivers 10-40 Mbps upload — adequate for 1080p60 streaming (requires 6 Mbps) but limited for 4K streaming or high-bitrate production. Cable offers 20-50 Mbps upload. Fiber offers symmetric upload matching download speeds.